JP5040301B2 - Terminal management system, method, and program - Google Patents

Description

  The present invention relates to a terminal management system, method, and program, and more particularly to a terminal management system, method, and program for managing a terminal device that executes a program using a package. It is another object of the present invention to provide a terminal device, an execution environment server, and a package server that can be used in such a terminal management system.

  Consider managing a terminal group such as a mobile phone, an information home appliance, a car navigation system, a POS terminal or a Kiosk terminal in a store. In order to manage these terminal groups, it is necessary to update or add programs that run on the terminals. In addition, it is necessary to back up a file that has been changed on the terminal side in preparation for failure or replacement of the terminal. As a conventional terminal management system, an example of a program distribution system is described in Patent Document 1. In this conventional terminal management system, when a terminal updates a program, the terminal downloads the difference between the new version and the old version, and configures the new version from the difference with the old version on the terminal side. Further, as another conventional terminal management system, an example of a program management apparatus is described in Patent Document 2. This conventional terminal management system refers to the operating conditions of the program to be installed, determines whether or not the terminal operates normally, and distributes the program only when it operates normally.

As a technology related to the terminal management system, an example of a storage system is described in Patent Document 3. This system stores multiple generations of backups in storage. This conventional storage system operates as follows. In other words, in this system, in addition to the operational volume from / to which data is read / written on the storage, a copy volume that stores a copy of the operational volume and a differential volume that stores differential data of snapshots of the operational volume are prepared. ing. The control device that controls the storage copies the data of the operation volume to the copy volume at a predetermined timing. Also, in response to a write request to the operation volume, the difference data from the snapshot is stored in the difference volume. By managing these generations, when a read request to the previous generation is received, the data of the old generation is backed up by reading the data from the differential volume and / or the copy volume.
JP 2001-273147 A JP 2001-022562 A JP 2006-107162 A

  The first problem of the prior art is that there is a library that is shared by a plurality of programs, and each program cannot cope with a request for a different version of the library. The reason is that, in the prior art, when an attempt was made to install a program in such a state, it was dealt with only by an error indicating that it was not compatible with the environment. The second problem is that the old version of the program cannot be used. The reason is that, in the conventional technique, a new version is configured using a difference between the old version and the new version, which causes the old version to be discarded.

  In the prior art, there is no distinction between a file that has been changed by the program itself and a file that has been changed to update the program. In file backup, files that have been changed due to program updates can be re-downloaded, so that it is not necessary to perform backup. However, the conventional technology does not distinguish between files that have been changed by the program and files that have been changed to update the program. The file is backed up in the same way as the file changed by the program, and the file in the terminal cannot be backed up efficiently.

  The present invention solves the above-described problems of the prior art, and even when a library shared by a plurality of programs exists, a terminal management system, method, and program that allow each program to refer to a different version of the library The purpose is to provide.

  Another object of the present invention is to provide a terminal management system, method, and program that can use an old version of the program even after the version of the program is updated.

  Another object of the present invention is to provide a terminal management system, method, and program capable of partitioning a program main body and a file updated as the program is executed and efficiently performing backup. .

  To achieve the above object, a terminal management system according to the present invention includes a terminal device, an execution environment server for storing a backup of the terminal device, and a package server for providing a package to the terminal device. In the management system, the terminal device stores a plurality of versions of the package, the original version, and a package management unit that stores and manages the directory in the storage device by dividing the difference between the versions, and the plurality of directories. A layer structure directory management unit having a function of mounting a directory as a mount point while having a layer structure, and the terminal device stores the directory in the storage device by using the layer structure directory management unit The package of the target version is composed of the original version of the package and the difference between the versions. To.

  In the terminal management system of the present invention, the terminal device uses the layer structure directory management means to configure the package of the target version from the original version of the package stored separately in the directory and the difference between the versions. Here, a package is a collection of a plurality of files necessary for executing a program or a library group used for execution of other packages. Differences between versions are compared to previous versions. This is a group of files (including additions and deletions) that have been changed. For example, it is assumed that the original version is the first version and the difference [first version-second version] and the difference [second version-third version] are included as differences between the versions. In this case, the terminal device constitutes the third version of the package with the first version, the difference [first version-second version], and the difference [second version-third version], and the difference between the first version and the difference [first version]. The first edition-the second edition] constitute the second edition of the package. In this way, the target version of the package is composed of the original version and the difference between the versions using the layer structure directory management means, so that the old version of the package is used while the latest version of the package is used. It becomes possible to do. Also, for example, when a program of a certain package uses a library of a specific version of another package, each program is configured by configuring the specific version of the package using the layer structure directory management means. You can refer to libraries in different versions of the package.

  In the terminal management system of the present invention, the terminal device mounts the original version of the package and the difference between the versions on a specific directory using the layer structure directory management means, and The structure which comprises a package is employable. For example, UnionFS is known as a file system having a function of mounting a plurality of directories on a certain directory while having a layer structure. By using the layer structure directory management means for realizing such a file system, for example, by mounting the first version of the package and the difference [first version-second version] on the mount point, the mount point It can be seen as the second version of the package, and the package of the target version can be configured from the original version of the package and the difference between the versions.

  In the terminal management system of the present invention, an execution environment management that configures an execution environment with the package of the configured target version and an update file storage directory for storing a file created / updated as the program is executed A configuration further comprising means can be adopted. The package is not changed by the program operation, and can be reacquired from the package server when attempting to restore the package. On the other hand, a file created / updated by executing a program cannot be obtained from others, and therefore needs to be backed up in preparation for restoration. By separating the directory for storing the update file from the directory for storing the package, it is sufficient to back up the update file storage directory at the time of backup, and an efficient backup can be realized.

  In the terminal management system of the present invention, the execution environment management means mounts the original version of the package and the difference between the versions on the directory serving as the mount point using the layer structure directory management means. It is possible to adopt a configuration in which a version package is configured and the execution environment is configured by mounting the update file storage directory on the configured target version package. Directory that needs to be backed up by mounting the directory so that files created and updated in the configured execution environment are stored in the update file storage directory using the layer structure directory management means (update file storage directory) And a directory that does not need to be backed up (a directory that is a source of a package and a directory that stores a difference between the versions), and backup efficiency can be improved.

  In the terminal management system of the present invention, after the execution environment is configured, the execution environment management unit uses the directory isolation unit to isolate a directory as a mount point into the execution environment, and installs the target version of the package. A configuration for executing a program can be employed. In this case, by isolating the installation program to the mount point corresponding to the execution environment, only the directories below the mount point can be seen from the installation program, and are created and updated as the installation program is executed. Since the file is stored in the update file storage directory, the original version of the package that constitutes the execution environment and the directory that stores the differences between the versions are not modified, and can be safely used between multiple execution environments. You can share packages.

  In the terminal management system of the present invention, when the execution environment is configured, the execution environment management means includes information on the mount point corresponding to the execution environment and the mount order of the directory to the mount point, and the update corresponding to the execution environment. A configuration can be adopted in which execution environment information including information related to the file storage directory is stored in the database. In this case, by referring to the database, it is possible to acquire information such as what execution environment exists, the correspondence between the execution environment and the mount point, or the mount order of the mount point.

  In the terminal management system of the present invention, it is possible to adopt a configuration in which the information regarding the update file storage directory includes information indicating whether or not the update file storage directory has been backed up. In this case, when the execution environment management means receives the backup request for the execution environment, the execution environment management means refers to the execution environment information, extracts the update file storage directory that has not been backed up from the update file storage directory, and extracts the extracted A configuration can be adopted in which the update file storage directory is transmitted to the execution environment server.

  In the terminal management system of the present invention, the execution environment server may be configured to store the contents of the received update file storage directory in the storage device when receiving the update file storage directory from the terminal device. In addition, when the execution environment server stores the contents of the received update file storage directory in a storage device, the database in the execution environment server includes information related to the directory storing the contents of the update file storage directory. A configuration for storing internal execution environment information can be employed.

  In the terminal management system of the present invention, after the backup of the update file storage directory, the execution environment management unit uses the layer structure directory management unit to create a new update file storage directory on the mount point corresponding to the execution environment. The structure which mounts can be employ | adopted. By mounting a new update file storage directory after backup of the update file storage directory, files created and updated after the backup are stored in a new update file storage directory. Therefore, at the time of the next backup, the new update file storage directory may be backed up, and the number of files to be backed up can be reduced.

  In the terminal management system of the present invention, when the execution environment server receives a request for restoring the backed up execution environment from the terminal device, the execution environment server refers to the in-server execution environment information and stores the update file storage directory to be restored. A configuration can be adopted in which a directory for storing contents is extracted, and the contents of the extracted directory are transmitted to the terminal device. For example, when reconfiguring the execution environment, the terminal device transmits a restore request to the execution environment server, and requests transmission of the update file storage directory mounted in the execution environment. In response to this request, the execution environment server transmits a backup of the requested update file storage directory to the terminal device. By doing so, the execution environment can be reconfigured in the terminal device.

  In the terminal management system of the present invention, when the terminal device operates as a proxy of the execution environment server, the execution environment management means of the terminal device operating as the proxy receives the update file storage directory from the backup source terminal device. , Storing the contents of the received update file storage directory in a storage device, storing other terminal execution environment information including information on the directory storing the contents of the update file storage directory in the database, and the execution environment A configuration can be adopted in which the contents of the received update file storage directory are transferred to the server. In this case, since the terminal device operates as a proxy for the execution environment server with respect to the other terminal device, the other terminal device that generates the backup request can execute the execution environment server even when the execution environment server cannot be directly accessed. Backup can be done. Further, by passing backup requests through a terminal device serving as a proxy, it is possible to prevent access from being concentrated on the execution environment server.

  In the terminal management system of the present invention, when the terminal device operating as the proxy receives a restore request from another terminal device, the terminal device refers to the other terminal execution environment information and stores the update file to be restored from the storage device It is possible to adopt a configuration in which a directory storing the contents of the directory is extracted and the extracted directory contents are transmitted to the terminal device that issued the restore request. In this case, instead of the execution environment server, the terminal device operating as a proxy transmits the contents of the backup file storage directory that was backed up to the terminal device that issued the restore request, thereby reducing the processing load on the execution environment server. be able to. When the terminal device that operates as a proxy differs between backup and restore, the backup is not stored in the terminal device that operates as the proxy. In such a case, the terminal device operating as a proxy may transfer the restore request to the execution environment server and perform the restore using the execution environment server.

  In the terminal management system of the present invention, the execution environment management means can adopt a configuration in which an environment for executing a program is isolated for each execution environment using a directory isolation means. In this case, by isolating the program execution for each execution environment by the directory isolation means, the directories constituting the other execution environments cannot be seen from each execution environment. For this reason, any version of the package can be shared with other execution environments and used as a unique one.

  In the terminal management system of the present invention, when the execution environment management means updates the version of the package used in the execution environment to a version newer than the version of the package currently used, a new mount point is used. Is created, and the directory mounted on the mount point directory corresponding to the execution environment is checked with reference to the execution environment information, and the layered directory management unit is used to check the directory mounted on the created directory. It is possible to adopt a configuration in which a directory mounted on a mount point corresponding to the execution environment, a version difference corresponding to the new version, and a new update file storage directory are mounted. In this case, mount the directory that was mounted in the original execution environment, the directory that stores the version differences corresponding to the new package version, and the newly created update file storage directory to the new mount point. An execution environment that uses a new version of the package can be configured. Also, by using the original mount point, the package can be used in the old version.

  In the terminal management system according to the present invention, when the execution environment management unit receives a layer combination request for combining the directories mounted on the mount point into one for the execution environment, the execution environment management unit stores the combined contents. A directory can be created, a mount point corresponding to the execution environment can be identified with reference to the execution environment information, and the contents of the directory viewed from the identified mount point can be copied to the created directory . When a large number of directories are mounted on the mount point, it is possible that performance decreases due to an increase in the number of mount directories. By integrating the contents of the directories visible from the mount point into one directory by the execution environment management means, it is possible to avoid performance degradation caused by mounting a large number of directories.

  In the terminal management system of the present invention, when the execution environment management means receives the layer combination request, it creates a directory that becomes a new mount point and an update file storage directory, and uses the layer structure directory management means, It is possible to adopt a configuration in which a directory obtained by copying the contents of a directory viewed from the identified mount point and the created new update file storage directory are mounted on the created directory as the new mount point.

  In the terminal management system of the present invention, the package server can adopt a configuration in which a plurality of versions of a package are stored in a storage device by dividing a directory according to the first version of the package and a difference between the versions. Since the package server needs to provide the terminal device with the requested version of the package, the package is classified into the first version (first version), the first version to the second version, the second version to the third version. Like a version, it is saved in the form of a difference between two adjacent versions. By doing so, the requested version of the package can be provided to the terminal device.

  In the terminal management system of the present invention, the terminal device refers to a database that stores package information including information about the version of the package or version difference stored in the storage device in the terminal device, and the package of the target version is It is possible to determine whether or not the configuration can be configured using the version or version difference in the terminal device, and when determining that the configuration is not possible, adopt a configuration that requests the package server to download a necessary version or version difference. it can. For example, when the third version of the package is required, the first version of the package, the version difference [first version-second version], and the version difference [second version-third version] are stored in the terminal device. When present, the third version can be configured with packages stored in the terminal device, so no download is necessary. On the other hand, when the first version of the package and the version difference [first version-second version] exist in the terminal device, the target third version cannot be configured by the package in the terminal device. [Second Edition-Third Edition] is downloaded from the package server. Further, when the package is not stored at all in the terminal device, the package server may be requested to download the target third version.

  In the terminal management system according to the present invention, when the package server receives a download request from the terminal device, the database stores in-server package information including information for specifying a directory for storing the version and version difference of each package. The directory required for configuring the version or version difference requested from the terminal device is extracted, and the extracted directory is mounted with a plurality of directories having a layer structure as a mount point directory. It is possible to employ a configuration in which a layer structure directory management means having a function of mounting is used to mount a directory as a mount point and the contents of the mount point directory are transmitted to the terminal device. For example, when a version difference [first version-third version] is requested from the terminal device, the package server uses the layer structure directory management unit to change the version difference [first version-second version] and the version difference [ Mount 2nd Edition-3rd Edition] on the mount point. Looking at this mount point, it corresponds to the version difference [first version-third version], so this may be transmitted to the terminal device.

  In the terminal management system of the present invention, when the package management means receives the contents of the mount point directory transmitted from the package server, the received contents are stored in the storage device as a new version or version difference. Can be adopted. For example, when the terminal device receives the third version of the package from the package server, the terminal device newly registers the third version in the storage device as the original version of the package. When a version difference [second version-third version] is received from the package server, the version difference [second version-third version] is newly registered in the storage device as a new version difference. By doing so, the version or version difference of the newly registered package can be used in the terminal device.

  In the terminal management system of the present invention, the terminal device operates as a proxy of the package server, and the package management means of the terminal device operating as the proxy receives the download request from the terminal device of the download request source, Referring to the package information, extract the directory required for configuring the requested version or version difference, and use the layer structure directory management means to extract the extracted directory onto the directory that becomes the mount point. It is possible to adopt a configuration in which the contents are mounted and the contents of the mount point directory are transmitted to the terminal device that requested the download. In this case, the terminal device operates as a proxy of the package server with respect to other terminal devices, so that other terminal devices that require downloading of the package are necessary even in a situation where the package server cannot be directly accessed. You can get the package. For packages that can be provided by a terminal device that operates as a proxy, the package is provided by the proxy, thereby reducing the processing load on the package server.

  In the terminal management system of the present invention, when the terminal device operating as the proxy cannot extract a directory required for constructing the download requested version or version difference, the download received from the download requesting terminal device A configuration in which the request is transferred to the package server can be adopted. The terminal device operating as a proxy does not always have the difference between the first version and each version for every package, and the package that the terminal device has may not be able to configure the requested version or version difference. . In such a case, a download request may be transferred to the package server and downloaded from the package server.

  In the terminal management system of the present invention, it is possible to adopt a configuration in which the information regarding the version or version difference of the package includes information indicating whether or not a directory corresponding to the version or version difference is used in the execution environment. In this case, when the package management unit is instructed by the storage device to delete the original version of the package or the directory that stores the version difference, whether or not the directory is in use with reference to the package information. A configuration can be adopted in which the directory to be erased is erased from the storage device when it is not in use. In this case, for the package that is instructed to be deleted, check whether the directory in which the package is stored is used in any execution environment, and execute the deletion after confirming that it is not used. In fact, you can avoid accidentally erasing packages that are being used.

  In the terminal management system of the present invention, the package management means transmits to the package server that notification is required when there is a package registration that can be newly provided on the server side, and has received the notification. In this case, a configuration for registering contents to be executed by the terminal device can be employed. When a new package that can be provided is registered on the server side, a message to that effect is sent to the terminal device, so that the terminal device can be newly provided on the server side. You can know the existence of another package. Regarding the contents to be executed when the notification is received, for example, an operation of downloading or installing a package that can be newly provided can be considered.

  In the terminal management system according to the present invention, when the package server receives notification from the terminal device that the notification is required, the package server stores the notification that the notification is required, and the storage device can store the version of the package that can be newly provided or When the version difference is registered, it is possible to adopt a configuration in which a new package version or a version difference can be provided to the terminal device.

  In the terminal management system of the present invention, the package management means is configured to execute the registered contents to be executed when receiving from the package server that a new package version or version difference can be provided. Can be adopted. For example, for a package that is scheduled to be used in advance, register that a notification is required when a new version (version difference) becomes available, and provide it as the contents to be executed when the notification is received Register download and installation of available version differences. When a notification is received from the package server, the latest version of the package must be downloaded from the package server when an execution request using the latest version of the package occurs by executing download and installation. Is no longer available and packages can be used quickly.

  The terminal device of the present invention includes a package management means for storing and managing a plurality of versions of a package in a storage device by dividing a directory according to an original version and a difference between the versions, and a plurality of directories at a mount point. And a layer structure directory management unit having a function of mounting the directory structure while having a layer structure, and using the layer structure directory management unit, the directory is divided and stored in the storage device. A package of a target version is configured from the version and the difference between the versions.

  The terminal device of the present invention mounts the original version of the package and the difference between the versions on a specific directory using the layer structure directory management means in the package configuration of the target version, A configuration that forms a package of a target version can be adopted.

  The terminal device according to the present invention includes an execution environment management unit that configures an execution environment by the package of the configured target version and an update file storage directory for storing a file created / updated as the program is executed. It is possible to adopt a configuration further comprising

  In the terminal device according to the present invention, the execution environment management unit mounts the original version of the package and the difference between the versions on the directory serving as the mount point using the layer structure directory management unit. A configuration in which the execution environment is configured by superimposing and mounting the update file storage directory on the package of the configured target version can be adopted.

  In the terminal device according to the present invention, the execution environment management unit uses the directory isolation unit to isolate a directory as a mount point in the execution environment after the configuration of the execution environment, and installs the target version of the package Can be adopted.

  In the terminal device according to the present invention, when the execution environment is configured, the execution environment management unit includes information on the mount point corresponding to the execution environment and the mount order of the directory to the mount point, and the update file corresponding to the execution environment. A configuration can be adopted in which execution environment information including information related to the storage directory is stored in the database.

  In the terminal device of the present invention, it is possible to adopt a configuration in which the information related to the update file storage directory includes information indicating whether or not the update file storage directory has been backed up.

  In the terminal device according to the present invention, when the execution environment management unit receives a backup request for the execution environment, the execution environment management means refers to the execution environment information and extracts an update file storage directory that has not been backed up from the update file storage directory. The extracted update file storage directory may be transmitted to an execution environment server that stores a backup of the execution environment in the terminal device.

  In the terminal device according to the present invention, the execution environment management means transmits the updated file storage directory to the execution environment server, and then uses the layered structure directory management means to newly create the file on the mount point corresponding to the execution environment. It is possible to adopt a configuration that mounts an update file storage directory.

  The terminal device of the present invention operates as a proxy of the execution environment server, and when the execution environment management means of the terminal device operating as the proxy receives the update file storage directory from the backup source terminal device, the received update file The contents of the storage directory are stored in a storage device, and the other terminal execution environment information including information on the directory storing the contents of the update file storage directory is stored in the database, and the received information is received by the execution environment server. A configuration for transferring the contents of the update file storage directory can be adopted.

  In the terminal device according to the present invention, when the execution environment management means of the terminal device operating as the proxy receives a restore request from another terminal device, the execution environment management means refers to the other terminal execution environment information and restores from the storage device It is possible to adopt a configuration in which a directory for storing the contents of the update file storage directory is extracted and the contents of the extracted directory are transmitted to the terminal device that issued the restore request.

  In the terminal device of the present invention, the execution environment management means can employ a configuration in which an environment for executing a program is isolated for each execution environment using a directory isolation means.

  In the terminal device according to the present invention, the execution environment management means sets a new mount point when updating the version of the package used in the execution environment to a version newer than the version of the package currently used. Is created, and the directory mounted on the mount point directory corresponding to the execution environment is checked with reference to the execution environment information, and the layered directory management means is used to create a directory on the created directory. It is possible to adopt a configuration in which a directory mounted on a mount point corresponding to the execution environment, a version difference corresponding to the new version, and a new update file storage directory are mounted.

  In the terminal device according to the present invention, when the execution environment management means receives a layer combination request for bringing together a group of directories mounted on a mount point for the execution environment, the execution environment management means stores the contents after the combination. The directory can be created, the mount point corresponding to the execution environment can be identified by referring to the execution environment information, and the contents of the directory viewed from the identified mount point can be copied to the created directory.

  In the terminal device according to the present invention, when the execution environment management means receives the layer combination request, it creates a directory as a new mount point, and stores the contents after the combination using the layer structure directory management means. It is possible to adopt a configuration in which a directory to be mounted is mounted on a directory that becomes the newly created mount point.

  The terminal device according to the present invention refers to a database that stores package information including information related to a version or version difference of a package stored in a storage device in the terminal device, and the target version package is a version in the terminal device or If it is determined whether it can be configured by using version differences, and if it is determined that it cannot be configured, a plurality of versions of the package are stored in the storage device by dividing the directory by the first version of the package and the difference between each version, A configuration may be adopted in which a package server that provides a package to the terminal device requests download of a necessary version or version difference.

  In the terminal device according to the present invention, the package management means may be configured to receive the necessary version or version difference from the package server and store it in a storage device.

  The terminal device of the present invention operates as a proxy of the package server, and the package management means of the terminal device operating as the proxy refers to the package information when receiving a download request from the terminal device of the download request source. Then, a directory required for composing a download requested version or version difference is extracted, and the extracted directory is mounted on a directory as a mount point using the layer structure directory management means, and the mount point A configuration in which the contents of the directory are transmitted to the terminal device that is the download request source can be employed.

  In the terminal device according to the present invention, when the package management means of the terminal device operating as the proxy is unable to extract a directory required for configuring the download requested version or version difference, the download request source terminal device A configuration can be adopted in which the received download request is transferred to the package server.

  In the terminal device of the present invention, it is possible to adopt a configuration in which the information related to the version or version difference of the package includes information indicating whether or not a directory corresponding to the version or version difference is used in the execution environment.

  In the terminal device according to the present invention, when the package management unit is instructed by the storage device to delete the version or version difference from which the package is based, the directory is in use with reference to the package information. It is possible to adopt a configuration in which it is checked whether or not there is a directory and the directory to be deleted is deleted from the storage device when it is not in use.

  In the terminal device of the present invention, the package management means transmits to the package server that a notification is required when there is a new package registration that can be provided on the server side, and when the notification is received In addition, it is possible to adopt a configuration for registering contents to be executed by the terminal device.

  In the terminal device of the present invention, the package management means adopts a configuration that executes the registered contents to be executed when receiving a notification that a new package version or version difference can be provided from the package server. it can.

The package server of the present invention comprises a package management means for storing and managing a plurality of versions of a package in a storage device by dividing a directory by a first version of the package and a difference between the versions, and the package management means includes: When a download request is received from the terminal device, the version requested from the terminal device or the version stored in the server including the information for specifying the version of each package and the directory for storing the version difference is stored. Extract the directories necessary to configure the version difference, and use the layer structure directory management means that has the function to mount multiple directories on the mount point directory while having the layer structure. Mount on the directory to be The contents of the directory, and transmits to the terminal device, and wherein the.

  In the package server according to the present invention, when the package management unit receives notification from the terminal device that a notification is required when there is a version or version difference of a package that can be newly provided on the server side, the notification is that the notification is required. When the version or version difference of a package that can be newly provided is registered in the storage device, the fact that the version or version difference of the new package can be provided is transmitted to the terminal device. Configuration can be adopted.

  The terminal management method of the present invention is a terminal management method for managing a computer that uses a package, wherein the computer has a function of mounting a plurality of directories in a directory serving as a mount point while having a layer structure. A directory management unit is used to configure a package of a target version from a version that is a source of a package that is stored separately in a storage device and a difference between the versions.

  In the terminal management method of the present invention, the computer mounts the original version of the package and the difference between the versions on a specific directory using the layer structure directory management means, and the package of the target version The structure which comprises can be employ | adopted.

  In the terminal management method of the present invention, the computer configures an execution environment by the configured target version package and an update file storage directory for storing a file created / updated as the program is executed. Can be adopted.

  In the terminal management method of the present invention, the computer mounts the original version of the package and the difference between the versions on the directory serving as the mount point by using the layer structure directory management means, and the package of the target version The execution environment can be configured by mounting the update file storage directory on the configured target version package and mounting it.

  In the terminal management method of the present invention, after the execution environment is configured, the computer uses a directory isolation means to isolate a directory as a mount point to the execution environment and execute an installation program for the target version of the package. Can be adopted.

  In the terminal management method according to the present invention, when the computer configures the execution environment, the information on the mount point corresponding to the execution environment and the mount order of the directory to the mount point, and the update file storage directory corresponding to the execution environment It is possible to employ a configuration in which execution environment information including information regarding the information is stored in a database.

  In the terminal management method of the present invention, it is possible to adopt a configuration in which the information regarding the update file storage directory includes information indicating whether or not the update file storage directory has been backed up.

  In the terminal management method of the present invention, when the computer receives a backup request for an execution environment, the computer refers to the execution environment information and extracts an update file storage directory that has not been backed up from the update file storage directory. A configuration can be adopted in which the extracted update file storage directory is transmitted to an execution environment server for storing a backup of the execution environment.

  In the terminal management method of the present invention, when the execution environment server receives the update file storage directory, the execution environment server can store the contents of the received update file storage directory in a storage device.

  In the terminal management method of the present invention, when the execution environment server stores the contents of the received update file storage directory in a storage device, the execution environment server stores the contents of the update file storage directory in a database in the execution environment server. A configuration for storing server execution environment information including information on directories can be adopted.

  In the terminal management method of the present invention, after the backup of the update file storage directory, the computer mounts a new update file storage directory on a mount point corresponding to the execution environment using the layer structure directory management means. Configuration can be adopted.

  In the terminal management method of the present invention, when the execution environment server receives a restore request for a backed up execution environment from the computer, the execution environment server refers to the execution environment information in the server and the contents of the update file storage directory to be restored It is possible to adopt a configuration in which a directory for storing the file is extracted and the contents of the extracted directory are transmitted to the computer.

  In the terminal management method of the present invention, when the computer operates as a proxy of the execution environment server and the computer operating as the proxy receives the update file storage directory from the backup source computer, the received update file storage directory In the storage device, and in the database, the other terminal execution environment information including information on the directory storing the contents of the update file storage directory is stored, and the received update file is stored in the execution environment server. A configuration for transferring the contents of the storage directory can be adopted.

  In the terminal management method of the present invention, when the computer that operates as the proxy receives a restore request from another computer, the computer that refers to the other terminal execution environment information refers to the update file storage directory to be restored from the storage device. A configuration in which a directory for storing contents is extracted and the contents of the extracted directory are transmitted to the computer that issued the restore request can be adopted.

  In the terminal management method of the present invention, the computer can employ a configuration in which an environment for executing a program is isolated for each execution environment by using a directory isolation means.

  In the terminal management method of the present invention, the computer becomes a new mount point when the version of the package used in the execution environment is updated to a version newer than the version of the package currently used. A directory is created, the directory mounted on the mount point directory corresponding to the execution environment is checked with reference to the execution environment information, and the layer structure directory management unit is used to create the directory on the created directory. It is possible to adopt a configuration in which a directory mounted on a mount point corresponding to the execution environment, a version difference corresponding to the new version, and a new update file storage directory are mounted.

  In the terminal management method of the present invention, when the computer receives a layer combination request for bringing together a group of directories mounted on a mount point for the execution environment, a directory for storing the contents after combination. The mount point corresponding to the execution environment is identified with reference to the execution environment information, and the contents of the directory viewed from the identified mount point can be copied to the created directory.

  In the terminal management method of the present invention, when the computer receives the layer combination request, the computer creates a directory to be a new mount point and an update file storage directory, and uses the layer structure directory management means to specify the specified mount. It is possible to adopt a configuration in which a directory obtained by copying the contents of a directory viewed from a point and the created new update file storage directory are mounted on the created directory as a new mount point.

  In the terminal management method of the present invention, the package server can adopt a configuration in which a plurality of versions of a package are stored in a storage device by dividing a directory by the first version of the package and a difference between the versions.

  In the terminal management method of the present invention, the computer refers to a database that stores package information including information related to the version or version difference of the package stored in the storage device in the terminal, and the target version of the package is stored in the terminal. It is possible to determine whether or not a configuration can be configured by using a version or a version difference, and when it is determined that the configuration cannot be performed, a configuration for requesting the package server to download a necessary version or version difference can be employed.

  In the terminal management method of the present invention, when the package server receives a download request from the computer, the package server stores a database for storing in-server package information including information for specifying a directory for storing the version and version difference of each package. A function for extracting a directory required for configuring a version or version difference requested by the computer and mounting the extracted directory on a directory serving as a mount point while having a layer structure. It is possible to employ a configuration in which a layer structure directory management means having a mount point is mounted on a directory serving as a mount point and the contents of the mount point directory are transmitted to the computer.

  In the terminal management method of the present invention, when the computer receives the contents of the mount point directory transmitted from the package server, the computer stores the received contents in the storage device as a new version or version difference. it can.

  In the terminal management method of the present invention, the computer operates as a proxy of the package server, and the computer operating as the proxy receives a download request from the download request source computer, refers to the package information, A directory required for configuring a version requested for download or a version difference is extracted, and the extracted directory is mounted on a directory serving as a mount point by using the layer structure directory management unit, and the mount point directory Can be adopted to transmit the contents of the above to the download request source computer.

  In the terminal management method according to the present invention, when the computer operating as the proxy cannot extract a directory required for configuring the download requested version or version difference, the computer receives the download request received from the download request source computer. A configuration of transferring to the package server can be adopted.

  In the terminal management method of the present invention, it is possible to adopt a configuration in which the information regarding the version or version difference of the package includes information indicating whether or not a directory corresponding to the version or version difference is used in the execution environment.

  In the terminal management method according to the present invention, when the computer is instructed to delete a directory that stores the version or version difference of the package from the storage device, the directory is in use with reference to the package information. It is possible to adopt a configuration in which the directory to be erased is erased from the storage device when it is not in use.

  In the terminal management method of the present invention, the computer transmits to the package server that a notification is required when there is a package registration that can be newly provided on the server side, and when the notification is received A configuration for registering contents to be executed by the computer can be employed.

  In the terminal management method of the present invention, when the package server receives notification from the computer that the notification is required, the package server stores the notification that the notification is required, and the version or version of the package that can be newly provided in the storage device When the difference is registered, a configuration can be adopted in which a new package version or a version difference can be provided to the computer.

  In the terminal management method of the present invention, when the computer receives from the package server that a new package version or version difference can be provided, the computer can execute the registered contents to be executed. .

Program of the present invention, a computer for controlling the terminal device, multiple versions of the package, the underlying plate, and, to save separately directories difference between the plate in the storage device managed by the package management unit, a plurality of the directory, the layer structure directory management unit having a function to mount while having a layer structure on a mount point directory, by using the layer structure directory management unit, the storage device of the package saved separately directory This is a program for causing an original version and a difference between the versions to function as a configuration unit that forms a package of the target version.

The program of the present invention, prior SL layer structure directory management means, on a particular directory, use a construction where to mount the difference between the underlying plate and the plate of the package, constitutes the plate package of the target it can.

In the program according to the present invention, the execution environment of the computer is configured by the package of the configured target version and an update file storage directory for storing a file created and updated as the package program is executed. It is possible to employ a configuration for further functioning as an execution environment management means .

In the program of the present invention, the execution environment management means mounts the original version of the package and the difference between the versions on the directory as the mount point using the layer structure directory management means. A configuration in which the execution environment is configured by superimposing and mounting the update file storage directory on the package of the configured target version can be adopted.

The program of the present invention, the execution environment management means forms the execution environment Then, using a directory isolation means, a directory to be the mount point and isolated in the execution environment, the object version of the package installation program You can adopt a configuration that perform.

In the program of the present invention, after the execution environment is configured , the execution environment management means includes information on the mount point corresponding to the execution environment and the mount order of the directory to the mount point, and the update file corresponding to the execution environment. the execution environment information including information about storage directory, can adopt a configuration you stored in a database.

  In the program of the present invention, a configuration in which the information related to the update file storage directory includes information indicating whether or not the update file storage directory has been backed up can be adopted.

The program of the present invention, the execution environment managing means extracts receives a backup request execution environment, with reference to the previous SL execution environment information, the update file storage directory of the non-backup of the update file storage directory and, the update file storage directory in which the extracted, can adopt a structure that sends to the execution environment server to store a backup of the execution environment.

In the program of the present invention, after the backup of the update file storage directory , the execution environment management means creates a new update file storage directory on the mount point corresponding to the execution environment using the layer structure directory management means. You can adopt a configuration you mount.

The program of the present invention, the execution environment management unit receives the update file storage directory from the backup source computer, stores the contents of the update file storage directory thus received in the storage device, in the database, the stores the other terminal execution environment information including information about the directory that stores the contents of the update file storage directory, the execution environment server can adopt a configuration to forward the contents of the received update file storage directory.

Directory program of the present invention, the computer, to store receives a restoration request from another computer, with reference to the previous SL other terminal execution environment information, the contents to be restored in the update file storage directory from said storage device A configuration for further functioning as a transmission unit that extracts the contents of the extracted directory and transmits the contents of the extracted directory to the computer that issued the restore request can be employed.

The program of the present invention, the execution environment managing means uses the directory isolation means, an environment to run the package program may employ a configuration you isolated for each of the execution environment.

The program of the present invention, the execution environment management unit, a version of the package that is available in the execution environment, when updated to a new version than the version of the package that is currently available, a new mount point Is created, and the directory mounted on the mount point directory corresponding to the execution environment is checked with reference to the execution environment information, and the layered directory management unit is used to check the directory mounted on the created directory. It can be employed and directories that are mounted on the mount point corresponding to the execution environment, the configuration you further mount plate differential and new update file storage directory corresponding to the new version.

The program of the present invention, the execution environment managing means for said execution environment, receives a layer binding request to summarize the mounted directory group on the mount point to one, for storing the contents of the following binding create a directory, with reference to the execution environment information specifying a mount point corresponding to the execution environment, you can adopt a configuration to copy the contents of the directory as seen from the mount point to the specified directory that the created .

The program of the present invention, the execution environment management unit receives the layer binding request to create a directory and update file storage directory as a new shelf mount point, by using the layer structure directory management unit, wherein and directory where you copied the contents of the directory as seen from the specified mount point, and the new update file storage directory in which the created, the configuration you mount on the directory to be a new mount point that the created can be adopted.

Program of the present invention, the computer, referring to a database that stores package information including information on a plate or a plate difference of the stored packages in the storage device, the package version of the package of interest is the storage As a requesting means for requesting a package server that provides a package to a terminal to download a necessary version or version difference, if it is determined whether it can be configured using a version or a version difference. A configuration for functioning can be adopted.

Program of the present invention, the computer receives the package transmitted from the package server, in order to further function as a package storage means for storing in said storage device for packages thus received as a new version or versions difference Configuration can be adopted.

Program of the present invention, the computer receives a download request from another computer functioning as the request unit, with reference to the previous SL package information needed to configure the plate or plate differential downloaded requested As a directory transmission unit that extracts a directory, mounts the extracted directory on a directory serving as a mount point using the layered directory management unit, and transmits the contents of the mount point directory to the other computer A configuration for further functioning can be employed.

Program of the present invention, the pre-Kiko computer, the when the directory needed to configure the downloaded requested version or versions difference can not be extracted, transfers the download request received from the other computer, the package server It is possible to employ a configuration for further functioning as a transfer means .

  In the program of the present invention, it is possible to adopt a configuration in which information relating to the version or version difference of the package includes information indicating whether or not a directory corresponding to the version or version difference is used in the execution environment.

The program of the present invention, the package management unit is instructed to erase the directory for storing the underlying plate or plate differential packages from the storage device by referring to the directory to use the pre-Symbol packages It checked whether it is in, when not in use, can adopt a configuration you erase a directory to be erased from the storage device.

In the program of the present invention, the package management means transmits to the package server that a notification is required when there is a new package registration that can be provided on the server side, and receives the notification. In this case, it is possible to adopt a configuration in which a process for registering contents to be executed by the computer is executed.

The program of the present invention, the package management unit is operable, when the plate or plate difference of the new package from the package server receives that made possible provided a process for executing the content to be executed, which is pre-Symbol Register The configuration to be executed can be adopted.

Program of the present invention, a computer, a plurality of versions of a package, package first edition, and a program for functioning as a package management means for stored and managed in the storage device by dividing a directory by the difference between the plate , and the said package management unit receives a download request from the terminal device, by referring to the database that stores the server in the package information including information for specifying the directory to store the plate and the plate difference of each package, the layer structure directory management unit having a function of the extracted directory needed to configure the plate or plate differential requested by the terminal apparatus, to mount while maintaining the layer structure in the directory where multiple directories the mount point de you used, the mount point to the directory where the extracted Mounted on directory, the contents of the mount point directory, and transmits to the terminal device, you characterized.

The program of the present invention, the package management unit receives the effect that requires notification of any plate or plate differential newly providable package at the server from the terminal device, that required the notification When a version or version difference of a package that can be newly provided is registered in the storage device, the fact that a new version or version difference of the package can be provided is transmitted to the terminal device. the configuration you can be adopted.

  In the terminal management system, method, and program of the present invention, a package is stored by dividing a directory in the form of an original version and a difference between the versions, and the layer structure directory management means is used when using the package. The package of the target version is constructed from the original version of the package and the differences between the versions. By doing so, the old version of the package can be used while the latest version of the package is used. Also, for example, when a program of a certain package uses a library of a specific version of another package, each program is configured by configuring the specific version of the package using the layer structure directory management means. You can refer to libraries in different versions of the package.

  In the terminal management system, method, and program of the present invention, the execution environment is configured by dividing a package and an update file storage directory for storing a file created / updated as the program is executed. When employed, the main part of the program can be separated from the part changed by the program operation. In this case, at the time of backup, the update file storage directory may be backed up, and an efficient backup can be realized.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the configuration of a terminal management system according to the first embodiment of the present invention. The terminal management system 100 includes a terminal 101, an execution environment server 111, and a package server 116. The package server 116 stores a plurality of files necessary for executing a program on the terminal or a group of libraries used for executing other packages (hereinafter referred to as a package). The execution environment server 111 stores a backup of the file updated by the operation of the program in the terminal. The execution environment server 111 and the package server 116 can be configured as separate servers. Alternatively, the function of the execution environment server 111 and the function of the package server 116 may be realized in the same server.

  The terminal 101 is configured as a computer system that executes various processes by program operations. Although only one terminal 101 is illustrated in FIG. 1, the terminal management system 100 may include a plurality of terminals 101. The terminal 101 includes a directory isolation unit 104, a layer structure directory management unit 105, an execution environment management unit 106, a database 107, a package management unit 108, a system control unit 109, and a request generation unit 110. In addition, an execution environment directory 102 and a package storage directory 103 are provided in a storage device such as a hard disk.

  The request generation unit 110 generates various requests according to user requests and the like. Examples of requests generated by the request generation unit 110 include a program execution request, an execution environment creation request, an execution environment backup request, and an execution environment restore request. The system control unit 109 controls the operation of each unit of the terminal 101. The system control unit 109 executes various processes using the execution environment management unit 106 and the package management unit 108 according to the request generated by the request generation unit 110. The layer structure directory management means 105 provides a function of mounting a plurality of directories on a certain directory while having a layer structure. The directory isolation means 104 provides a function of isolating a directory for each program to be executed.

  The layer structure directory management means 105 will be described with reference to FIG. In a file system that can use the layer structure directory management means 105, a plurality of directories can be mounted on a certain directory while having a layer structure. In FIG. 2, the directory / layer1 including the files foo, bar, and baz and the directory / layer2 including the file bar are mounted on / mnt with / layer1 on the bottom. When mounted in this way, looking in the / mnt directory, / layer1 / foo looks as / mnt / foo, / layer2 / bar looks as / mnt / bar, and / layer1 / baz becomes / mnt / baz appear. In this state, when / mnt / baz is updated, the updated content is saved as / layer2 / baz, and / layer1 / baz is not modified. For example, UnionFS is known as a file system having such a function.

  Next, the directory isolation means 104 will be described with reference to FIG. FIG. 3 shows a state where files foo and bar exist in a directory / DirA and a directory / DirB, respectively. In this case, if the process A is isolated to / DirA, / DirA / foo looks like / foo and / DirA / bar looks like / bar from the process A. Similarly, when the process B is isolated to / DirB, / DirB / foo looks like / foo and / DirB / bar looks like / bar from the process B. In this state, / DirB cannot be seen from the process A, and / DirA cannot be seen from the process B. Such means can be generally used as a system call or command called chroot in a Unix (registered trademark) OS. In some OSs, it is also realized as a function such as jail that extends chroot.

  The execution environment directory 102 has a mount point for isolating the operation environment for each program, and a directory for storing files updated by the operation of the program. The package storage directory 103 has a directory for storing a plurality of types and versions of packages. Each version of the package is provided by the original version of the package and the difference between the versions, and the package storage directory 103 stores the difference between the original version and the version by dividing the directory. . The difference between versions is a group of files (including additions and deletions) that have been changed from the previous version. When a package is used, a desired version of the package is configured by superimposing necessary version differences on the original version using the layer structure directory management means 105.

  The execution environment management means 106 creates, backs up, restores, etc. the execution environment. The execution environment is created by using the layer structure directory management means 105 and updating the package to be used in the execution environment among the versions or version differences stored in the package storage directory 103 at the mount point of the execution environment directory 102, and updating This is done by mounting a directory for storing files. When backing up and restoring the execution environment, the directory that stores the update file is the target of backup and restore. The package management unit 108 downloads a package and the like. When downloading, the necessary version or version difference of the package is acquired from the package server 116, and the acquired version or version difference of the package is stored in the package storage directory.

  FIG. 4 shows a directory structure in the recording device of the terminal 101. In this example, there are “mount point”, “update file”, and “package storage directory” under the root directory “/”, and “1” and “2” under “mount point”. Further, under the “update file”, there are “execution environment 1” and “execution environment 2”, and further below there are “first version”. Below the “package saving directory” are “package A”, “package B”, and “package C”, and below that are “first version” and the like. The “/ mount point” and “/ update file” directories in the figure correspond to the execution environment directory 102, and the “/ packages storage directory” corresponds to the package storage directory 103.

  The execution environment management means 106 uses the layer structure directory management means 105, for example, “/ package saving directory / package A / first edition”, “/ package saving directory / package A / difference [first edition” in FIG. -Second Edition], "/ Package Save Directory / Package B / First Edition", "/ Update File / Execution Environment 1 / First Edition" are mounted in this order on "/ Mount Point / 1". As a result, the execution environment 1 (first version) is created. In the execution environment 1, the two types of packages A and B coexist because the package B depends on the package A to use the library provided by the package A, for example. At the time of mounting, “/ update file / execution environment 1 / first edition”, which is a directory for storing files updated by execution of the program, is mounted at the top. By mounting in this way, the file updated in the execution environment 1 (first version) is stored in “/ update file / execution environment 1 / first version”. The file stored in the package storage directory 103 is not affected.

  When executing the program, the directory isolation means 104 is used to isolate the execution of the program to “/ mount point / 1”. By doing so, other directories cannot be seen from the program, and security is improved. In addition, the path where the file used by the program exists can be freely set. That is, for example, for a file “/ package saving directory / package A / difference [first edition-second edition] /lib/libfoo.so”, a program running in the execution environment will receive “/ lib / libfoo”. .so "can be accessed as a file. Since it is different from the “/ lib” directory accessed by other programs, the “/ lib” directory can be used freely without considering overlapping file names.

  The database 107 stores information about the package stored in the package storage directory in the terminal 101 and information about the execution environment in the execution environment directory 102. FIG. 5 shows a specific example of information about packages stored in the database 107. A table 1301 shown in FIG. 6 stores a correspondence relationship between a package name held by the terminal 101 and a table holding information related to the package. The method of constructing the package name is arbitrary. For example, a URL can be used as the package name. In that case, the package name can be used as a unique ID, and the name of the package server can be included in the package name.

  The table 1302 is created for each package and stores information related to the package. A table 1302 shown in FIG. 5 corresponds to the package A, and stores the version number of the package A or the difference version number, the directory in which the package exists, and the usage status of the package. By referring to the table 1301, it is possible to know which package exists in the terminal 101. Also, by referring to the table 1302, for each package existing in the terminal 101, what is the current latest version, whether the directory that constitutes the package is in use, or the file of each version You can know how to configure it.

  FIG. 6 shows information about the execution environment stored in the database 107. A table 1401 shown in the figure stores the correspondence relationship between an execution environment name, a package name used in the execution environment, a table holding information about the execution environment, and a table holding information about the update file storage directory. . An URL can be used for the execution environment name in the same manner as the package name, and by doing so, the name of the execution environment server can be included in the execution environment name. The table 1402 is created for each execution environment and stores information related to the execution environment. The table 1402 shown in FIG. 6 corresponds to the execution environment 3, and the version number of the execution environment, the mount point that can use the execution environment of the version, the information on the version of the package in the version, and the mount point The information of the mount order is stored.

  The table 1403 stores information on the update file didirectory in the execution environment. A table 1403 illustrated in FIG. 6 corresponds to the update file storage directory in the execution environment 3, and stores the version number of the update file, the directory name, and information indicating whether backup has been performed. By referring to the table 1401, it is possible to know what execution environment exists and what type of package is used in the execution environment. Further, by referring to the table 1402, it is possible to know the latest version of the execution environment and the mount point at which the execution environment is mounted. By referring to the table 1403, the update file storage can be performed. You can know the directory backup status. The database 107 only needs to store necessary information, and the information recording format is not limited to the above-described tables 1301 and 1302 and the tables 1401 to 1403.

  Returning to FIG. 1, the execution environment server 111 includes an execution environment directory 112, a layer structure directory management unit 113, a database 114, and an execution environment management unit 115. The layer structure directory management unit 113 provides the same function as the layer structure directory management unit 105 in the terminal 101, that is, a function of mounting a directory on a certain directory while having a layer structure. The execution environment directory 112 stores a backup of the execution environment directory 102 in the terminal 101. In the backup, the update file storage directory (the directory under [/ update file] in FIG. 4) in the execution environment directory 102 is backed up. As a result of the backup, the directory under the update file directory in the terminal 101 is stored in the execution environment directory 112 of the execution environment server 111.

  The database 114 stores information equivalent to the information related to the execution environment stored in the database 107 of the terminal 101 (FIG. 6). That is, information related to the execution environment existing in the system (corresponding to the table 1401), information related to the configuration contents of each execution environment (corresponding to the table 1402), and information related to the update file storage directory (corresponding to the table 1403) are stored. To do. In response to a request for backup of the execution environment from the terminal 101, the execution environment management unit 115 stores the update file storage directory in the execution environment directory 102 in the terminal 101 in the execution environment directory 112 in the execution environment directory 112. . In addition, when a restore request is received from the terminal 101, the contents of the update file storage directory backed up in the execution environment directory 112 are transmitted to the terminal 101 to perform data restoration.

  The package server 116 includes a package storage directory 117, a layer structure directory management unit 118, a database 119, and a package management unit 120. The package storage directory 117 stores packages provided to the terminal 101. Each package version is stored in the package storage directory 117 for all types of packages that can be provided. In the package storage directory 117, each package is stored in the form of the difference [first version-second version], the difference [second version-third version],. The directory structure of the package storage directory 117 is the same as that of the package storage directory 103 of the terminal 101 shown in FIG. 4. For each package, the difference between the first version and the version is stored separately for each directory.

  The database 119 stores information similar to the information (FIG. 5) related to packages stored in the database 107 of the terminal 101. That is, information on packages that can be provided to the terminal 101 (corresponding to the table 1301) and information on storage locations of the respective packages (corresponding to the table 1302) are stored. Similar to the layer structure directory management unit 105 of the terminal 101, the layer structure directory management unit 118 provides a function of mounting a directory on the directory while having a layer structure. The package management unit 120 registers a package in the package storage directory 117 and provides the package stored in the package storage directory 117 to the terminal 101.

  When providing the package to the terminal 101, the package management unit 120 provides the terminal 101 with a difference from the package that the terminal 101 already has. For example, when the latest version of the package held by the terminal 101 is the second version, and the third version of the package is provided from the package server 116, the package management unit 120 uses the difference [second version-third version]. Is transmitted to the terminal 101. Further, when the latest version of the package held by the terminal 101 is the first version, and the third version of the package is provided from the package server 116, the package management unit 120 uses the difference [first version-third version]. Is transmitted to the terminal 101.

  Here, the package storage directory 117 stores differences between adjacent versions such as a difference between the first version and the second version and a difference between the second version and the third version. As in the third version, the difference between the versions in which the intermediate version is omitted is not saved. Such a difference between the versions obtained by skipping the halfway version is created by mounting the required difference between the versions on the temporary directory by using the layer structure directory management means 118. For example, when creating the difference [first version-third version], a temporary directory is created on the storage device, and the layer structure directory management unit 118 is used to create the difference [first version] on the temporary directory. -Second edition] and the difference [second edition-third edition] are mounted in this order. Since the contents of the temporary directory thus mounted correspond to the difference [first version-third version], the contents may be transmitted to the terminal 101 as the difference [first version-third version].

  Explain how to back up the execution environment. FIG. 7A shows the mount state in the execution environment 1 before backup, and FIG. 7B shows the mount state in the execution environment 1 after backup. As described above, the execution environment is created by mounting a package used in the execution environment on the mount point and mounting a directory for storing the update file thereon. In FIG. 7A, the first version of package A (“/ package saving directory / package A / first version”) and package A are added to mount point 1 corresponding to “/ mount point / 1” in FIG. Difference between the first and second editions ("/ package saving directory / package A / difference [first edition-second edition]"), the first edition of package B ("/ package saving directory / package B / first 1 version) and the first version of the directory for storing update files in the execution environment 1 ("/ update file / execution environment 1 / first version") are mounted in this order.

  In the state shown in FIG. 7A, since the “/ update file / execution environment 1 / first edition” directory is mounted at the top, the file group updated by the execution of the program in the execution environment 1 Saved in the directory. Therefore, when the execution environment is backed up, only the “/ update file / execution environment 1 / first edition” directory needs to be backed up. After the backup is executed, a new directory “/ update file / execution environment 1 / difference [first version-second version]” is created by the execution environment management means 106, and the created directory is shown in FIG. As shown, mount at the top of mount point 1. By doing so, the update performed in the execution environment 1 (second version) after the backup is performed is saved in “/ update file / execution environment 1 / difference [first version−second version]”. Therefore, when taking a backup again, it is only necessary to back up "/ update file / execution environment 1 / difference [first version-second version]". As a result, the backup target files can be reduced.

  Next, a case where different versions of the same package are used in different execution environments will be described. FIG. 8 shows a directory layer structure in an execution environment 2 different from the execution environment 1 shown in FIG. The execution environment 2 includes the first version of the package A (“/ package saving directory / package A / first version”) and the first of the package C at the mount point 2 corresponding to the “/ mount point / 2” directory of FIG. Version ("/ package save directory / package C / first edition") and the first version of the directory for saving update files in the execution environment 2 ("/ update file / execution environment 2 / first edition") It is created by mounting. The version of the package A used in the execution environment 2 is the first version, which is different from the version of the package A (second version) used in FIG.

  A program operating in the execution environment 2 is isolated to “/ mount point / 2” by the directory isolation means 104. Thus, for example, a file “/ package saving directory / package A / first edition / lib / libfoo.so” can be accessed as “/lib/libfoo.so”. On the other hand, since the program operating in the execution environment 1 (FIG. 7) is isolated at “/ mount point / 1”, “/ package storage directory / package A / difference [first version-second version] / lib / libfoo” If there is a file called “.so”, it can be accessed as “/lib/libfoo.so”. “/Lib/libfoo.so” in the execution environment 1 and “/lib/libfoo.so” in the execution environment 2 are different files. The packages are mounted on the mount point in the oldest order, and the directory isolation means 104 By isolating the operation of the program into a directory (mount point) of each execution environment, different versions of the package A can be used in the execution environment 1 and the execution environment 2.

  The operation when updating the package version in the same execution environment will be described. FIG. 9A shows the directory layer structure of the execution environment 3 before the package version is updated. The execution environment 3 (first version) is created by mounting the package A first version and the first version of the directory in which the update file in the execution environment 3 is stored on the mount point 3. In this situation, when the version of the package A is updated to the second version, the execution environment management means 106 creates the mount point 4 which is a new mount point, as shown in FIG. 9B. The first version of the package A mounted on the original mount point 3 and the first version of the update file are overlaid on the mount point 4 and the difference of the package A [first version-second version] Then, a new update file storage directory (first version-second version) is overlaid. In this way, the first version of the execution environment 3 that uses the first version of the package A can be separated from the second version of the execution environment 3 that uses the second version of the package A. By using point 3, the program can be used safely in an old package state.

  Hereinafter, a detailed operation procedure of the terminal management system 100 will be described. The state acquisition will be described. When the request generation unit 110 generates a system status acquisition request, the system control unit 109 returns information corresponding to the request with reference to the database. As the status acquisition request, for example, information on what package is present in the terminal 101, what is the latest version of the package, and whether the directory constituting the package is in use, for example. A request to get In addition, regarding the execution environment, there may be a request for acquiring information such as what package is used in the execution environment and which version of the package is used in each version of the execution environment. Such information can be acquired by referring to the tables 1301 and 1302 (FIG. 5) and the tables 1401 to 1403 (FIG. 6) of the database 107.

  The erasing of the package will be described. When the request generation unit 110 generates a package deletion request, the system control unit 109 requests the package management unit 108 to delete the corresponding package. Upon receiving the request, the package management unit 108 refers to the table 1302 of the database 107 for the package name and version or version difference of the package to be deleted, and confirms the usage status of the version or version difference of the package. If the usage state is “unused”, the package management unit 108 refers to the table 1302 to check the directory for storing the version or version difference of the package, and deletes the directory from the package storage directory 103. Also, the usage state in the table 1302 is updated to “delete”. If the usage status is “in use”, the directory cannot be deleted and an error is returned. If the usage status has already been “erased”, the processing is terminated as it is.

  Explain how to create an execution environment. FIG. 10 shows a procedure for creating an execution environment. The execution environment creation request is input from the request generation unit 110 to the system control unit 109. The execution environment creation request is given the name of the execution environment that performs the execution to be created and the name of the package used in the execution environment. An execution environment must be created once before a program is executed in the execution environment. When the system control unit 109 receives the execution environment creation request from the request generation unit 110, the system control unit 109 instructs the execution environment management unit 106 in the terminal to create the execution environment. When the execution environment management unit 106 receives an instruction to create an execution environment, the execution environment management unit 106 requests the execution environment management unit 115 of the execution environment server 111 to create an environment in order to register backup information (step A1).

  The execution environment management means 115 adds a new row to the table corresponding to the table 1401 of the database 114 after confirming that the execution environment having the same name as the name of the execution environment to be created does not already exist. Save environment name and package name information. Also, empty tables corresponding to the tables 1402 and 1403 are created corresponding to the execution environment to be created and stored in the database 114 (step A2). Since the execution environment name needs to be unique within the system, the execution environment management unit 115 returns an error when an execution environment having the same name as the execution environment to be created already exists.

When the execution environment management unit 106 of the terminal 101 receives a response from the execution environment management unit 115 of the execution environment server 111 that information registration to the database 114 has been normally performed, the execution environment management unit 106 stores the database 107 in the database Information similar to the registered information is registered (step A3). That is, a new row corresponding to the execution environment to be created is added to the table 1401 of the database 107, the execution environment name and the package name information are stored, and an empty table 1402 corresponding to the execution environment to be created. 1403 is created.

  Next, the procedure for executing the program will be described. FIG. 11 shows a procedure for executing the program. The program execution request is input from the request generation unit 110 to the system control unit 109. This execution request includes the name of the execution environment in which the program is executed, the specification of the version of the execution environment, the path of the program to be executed (for example, / bin / program_name), and the like. The path of the program to be executed may be fixed at / init, for example. In addition, the execution request can also include designation of executing the package of the program to be executed in the latest version, designation of whether or not to connect to the server, and the like. When the old version of the execution environment is specified in the execution environment version specification, the program using the old version of the package is executed. When the terminal 101 is disconnected from the network or when the execution request specifies that connection to the server is not performed, the program is executed in an already available execution environment.

  When receiving an execution request from the request generation unit 110, the system control unit 109 determines whether or not connection to the execution environment server 111 is possible (step B1). In Step B1, when the terminal 101 is disconnected from the network, or when the execution request specifies that the connection to the server is not performed, it is determined that the connection to the server is impossible. Further, when the terminal 101 is connected to the network and the execution request does not specify that the connection to the server is not performed, it is determined that the connection to the execution environment server 111 is possible.

  If the connection to the server is possible, the system control means 109 determines whether or not an execution request for the latest version has been made (step B2). When an execution request for the latest version is made, the database 107 is referred to and a package group used in the execution environment specified by the execution request is checked. The package used in the execution environment can be checked by referring to the table 1401 of the database 107. The system control unit 109 passes the name of the package group used in the execution environment to the package management unit 108. The package management unit 108 transmits the name of the package group to the package management unit 120 of the package server 116 and inquires the latest version number for each package. (Step B3).

  When the package management unit 120 of the package server 116 receives an inquiry about the latest version number from the terminal 101, the package management unit 120 of the terminal 101 obtains the latest version number of the package in the package server 116 with reference to the database 119. Return to. The latest version number of the package can be acquired by referring to a table corresponding to the table 1302 in the database 119. The package management unit 108 in the terminal 101 receives the latest version number of each package from the package server 116 and returns the received latest version number to the system control unit 109.

  The system control unit 109 checks whether or not the version 101 package group to be used for execution exists in the terminal 101 (step B4). In step B4, when an execution request for the latest version is made, it is determined whether or not a version of the latest version number of the package returned in response to the inquiry in step B3 exists in the terminal 101. . When an execution request is made with the execution environment version specified, the program is executed with the existing execution environment version. However, in this system, erasure of the package is allowed. Thus, it is determined whether a version of the package used in the designated version exists in the terminal 101. If the required package does not exist in the terminal, it must be downloaded from the package server 116.

  When the version of the execution environment is specified, in step B4, when checking whether the package used in the version exists in the terminal, first, the table 1402 of the database 107 is referred to and specified. Acquires the name of the package used in the version of the execution environment and the version and version difference information. Next, the table of the table 1072 in the database 107 is searched to check whether or not the corresponding and version difference state is “erased”. If it is not “deleted”, the package used in the past is not deleted from the terminal 101, and the corresponding version and the difference between the versions exist effectively in the terminal 101.

  When an execution request for the latest version is made, in step B4, when checking whether a package used in the execution environment of the latest version exists in the terminal, first, the table 1402 of the database 107 is stored. Refer to and acquire the version number of each package used in the latest version of the execution environment. Next, a version difference number is created from the version number in the execution environment and the latest version number of the package inquired in step B3, and this is searched from the table 1302 of the database 107. If there is no corresponding difference or the status is “erased”, it is necessary to download from the package server 116.

  Even if the corresponding version difference does not directly exist in the terminal 101, it is not necessary to download it if it can be composed of a plurality of version differences. For example, if the version of the package used in the current execution environment is the first version, and the version number of the latest version existing in the package server 116 is the third version, the required version is the difference [first version -Third edition]. In this case, even if the difference [first version-third version] does not exist in the terminal 101, the difference [first version-second version] and the difference [second version-third version] exist. For example, the third version can be configured by using them in combination, so there is no need to download them.

  If the version difference existing in the terminal 101 is not complete, a difference from the latest version that can be configured by a combination of differences existing in the terminal 101 may be downloaded. For example, in the above example, if the version number of the latest version existing in the package server 116 is the fifth version, the difference [first version-fifth version] which is a required version is the difference [first version -Second edition] and differences [second edition-third edition] are not included. In this case, since the third version can be configured with the difference in the terminal 101, the difference [third version-fifth version] may be downloaded. More specifically, the latest version of the version that can be configured in the terminal 101 can be known by starting from a version that is not a difference and searching for successive differences. For example, in the above example, starting from the first version, the difference from the first version is searched. When the difference [first version-second version] is detected, the difference from the second version is searched for next. In this way, the latest version that can be configured in the terminal 101 can be known. When there are a plurality of differences, for example, when there is a difference [first version-second version] and a difference [first version-third version], both are searched and closer to the target version. Use the one that can reach the plate.

  In step B4, the system control unit 109 determines that the version of the package group to be used for execution does not exist in the terminal 101, and determines that the download is necessary. Download is instructed (step B5). At that time, the system control unit 109 notifies the package management unit 108 of the name of the package to be downloaded and the version number or version difference. In the download, when a part of the package exists in the terminal 101, a necessary difference is downloaded. If the necessary package does not exist in the terminal 101, the entire version is the download target, not the difference.

  FIG. 12 shows a procedure for downloading a package from the server. The package management means 108 transmits the name of the package to be downloaded and the version number or version difference to the package management means 120 of the package server 116, and requests the download of the package (step C1). When receiving the download request, the package management means of the package server 116 refers to the database 119 and extracts a necessary version difference directory group (step C2). For example, if the requested version difference number is the difference [first version-third version], the necessary version difference directory groups are the difference [first version-second version] and the difference [second version-second version]. 3rd edition].

  After extracting the directory group, the package management unit 120 creates a temporary directory and mounts the extracted directory group on the created temporary directory using the layer structure directory management unit 118 (step C3). By mounting the extracted directory group on the temporary directory, necessary version differences are held in the temporary directory. In the above example, by mounting the difference [first version-second version] and the difference [second version-third version] in this order on the temporary directory, the difference [ The contents of the first edition-the third edition] are retained. The package management unit 120 archives the contents of the temporary directory and transmits it to the terminal 101 that transmitted the download request (step C4).

  The package management unit 108 of the terminal 101 receives the archive of the version or version difference requested for download from the package server 116, and expands and stores the received archive in the package storage directory 103 (step C5). At this time, if the downloaded version or version difference is in the “erased” state in the table 1302 of the database 107, the package management unit 108 describes the downloaded version or version difference in the table 1302. Save to the directory you have. This is because there may be an execution environment that refers to the directory. Otherwise, a new directory is created and saved in that directory.

  The package management unit 108 updates the contents of the database 107 after storing in the package storage directory 103 (step C6). In step C6, for example, the version or version difference that was in the “erased” state in the table 1302 is updated to the “unused” state. Further, when a new directory is created and saved, a new row is added to the table 1302, and the version or version difference information downloaded from the server and the saved directory information are additionally registered in the database 107. .

  Returning to FIG. 11, the system control unit 109 checks whether there is a package on which the package group processed in the previous steps depends (step B6). Information about the dependent package is described in the package, and can be known, for example, by referring to a dependency information file existing in the directory of the package. The dependency information may vary depending on the package version even in the same package. In addition, the dependency information may be described in the database. In this case, the dependent package is checked with reference to the database.

  For example, when the package X depends on the package Y, the dependency information of the package X describes not only the dependency on the package Y but also the version of the package Y. For example, “depending on the P version”, “depending on an arbitrary version after the P version: use the latest version if there is a latest version”, Depends on version P or higher but depends on version Q or lower: Use latest version if version Q or lower is available "," Depends on version Q or lower: latest if version Q or lower is available "Use the version".

  If the system control unit 109 determines in step B6 that there is a dependent package, the system control unit 109 returns to step B3 and acquires the latest version number in the package server 116 for the dependent package. It should be noted that in the case of “Accurately depends on the P version”, if the P version exists in the terminal 101 or “Depends on the Q version or lower: If there is a latest version in the Q version or lower, the latest version If the Q version is in the terminal 101, the necessary version already exists in the terminal 101, so the latest package number is acquired from the package server 116 in step B3. There is no need.

  The execution environment management unit 106 determines a required version from the version number of the latest version acquired from the package server 116 and the dependency information. That is, in the case of “exactly depends on the P version”, if the server has a version higher than the P version, the required version is the P version. In addition, in the case of “depending on an arbitrary version of the P version or higher: If the latest version is available, the latest version is used”, and if the server has a version of the P version or higher, the required version is the latest version. . Depends on (version P or higher) version Q or lower: If the latest version is lower than version Q, use the latest version, assuming that the server has a version higher than version P If the latest version is smaller than the Q version, the required version is the latest version. If the latest version is the Q version or more, the Q version is the required version.

  Thereafter, as described above, it is determined whether or not the required version exists in the terminal 101. If the required version does not exist, the required version is downloaded from the package server 116. Thereafter, in step B6, the presence of a dependent package is determined. If a dependent package exists, the process returns to step B3. By repeating this process, all necessary packages including the dependent packages are downloaded.

  When the download is completed, the system control unit 109 determines whether a necessary package has been installed (step B7). “Installed” means that in the target execution environment, it is mounted at a certain mount point together with the update file storage directory, and the installation program has been executed to perform initial settings. . Whether or not it has been installed can be determined by referring to the database 107. In other words, if the version of the package to be determined is equal to or lower than the version described in the package version of the table 1402, it is already installed.

  Whether or not a package has already been installed is checked for all the packages used in the execution environment, including dependent packages. The system control unit 109 requests the execution environment management unit 106 to install a package that is determined not to be installed (step B8). This request includes the name of the package to be installed, the version or version difference number, and the execution environment of the installation destination. When the execution environment of the installation destination is the execution environment immediately after the creation of the execution environment (FIG. 10), that is, the execution environment where the installation has never been performed, the installation changes the execution environment of the execution environment. One version will be created. For execution environments that have already been installed, a new version of the execution environment is created by this installation.

  FIG. 13 shows an operation procedure of the execution environment management means 106 at the time of installation. When receiving the installation request, the execution environment management means 106 creates a directory that becomes a new mount point (step D1). Further, a new directory for storing the update file of the execution environment to be created is created (step D2). For example, if the latest version number of the current execution environment is the first version, the update file storage directory created in step D2 is a difference [first version-second version]. If the execution environment has never been installed, it is the first version.

  The execution environment management unit 106 refers to the database 107, and from the table 1402, among the existing execution environments, the versions or version differences of the packages and update files mounted in the latest version of the execution environment, and their mounting order Is acquired (step D3). Next, using the layer structure directory management means 105, the directories corresponding to them are acquired from the tables 1302 and 1403, and mounted on the mount points newly created in step D1 in the same order as the acquired mount order. Further, a directory for storing the version (version difference) of the package to be installed is overlaid, and a directory for storing the update file newly created in step D2 is mounted thereon (step D4). If the latest version of the execution environment does not exist, that is, if the execution environment has never been installed, the version of the package to be installed and the update file storage directory are displayed on the mount point. Mounted.

  The execution environment management unit 106 executes the installation program after isolating the mount point created in step D1 using the directory isolation unit 104 (step D5). The installation program is provided with the package and is used for initialization and the like. By isolating the mount point using the directory isolation means 104, the file updated by the installation is stored in a directory for storing the update file mounted at the highest level with respect to the mount point. For this reason, the package itself is not modified, and the package can be safely shared among a plurality of execution environments.

  After executing the installation program, the execution environment management means 106 inserts a row into the table 1402 of the database 107, and registers the installed package information and the mount order information as the new execution environment version information ( Step D6). The “version number” of the version of the new execution environment in the table 1402 is obtained by adding 1 to the previous version. In addition, the execution environment management unit 106 inserts a row into the table 1403 and stores information on a directory in which a newly created update file is stored. The “version number” in the table 1403 at this time is a difference from the previous version.

  Returning to FIG. 11 again, the system control unit 109 uses the directory isolation unit 104 to execute the program of the path specified in the execution request in the execution environment in which the package is installed (step B9). When executing the program, the system control means 109 sets the version of the package being used and the state of the version difference to “in use” for the table 1302 of the database 107. When the execution of the program is completed, if there is no other program using the version and difference of the package, the state in the table 1302 is updated to “unused”. Whether the program is being executed or terminated can be determined by using, for example, the following method. In other words, the directory in which the operation unit (for example, process) being executed is operating is examined using the function of the operating system. Since a process operating under a certain execution environment is operating under a specific mount point, this directory is searched from the table 1402 to determine which execution environment process is operating. it can.

  If it is determined in step B1 that connection to the network is impossible, that is, if the terminal 101 is disconnected from the network, or the execution request specifies that the program is to be executed without connecting to the server. If so, the process proceeds from step B1 to step B9, and the program is executed in the previously created execution environment. At that time, the system control means 109 confirms that the required package remains without being erased. Specifically, the mounted package and its version and version difference are extracted from the table 1402 of the database 107, the table 1302 is drawn for the version and version difference of the package, and the status is not “deleted”. Make sure. If the required package version and version difference have been erased, an error is displayed.

  Next, the update notification registration operation will be described. The update notification registration refers to registering the package server 116 so as to notify the terminal 101 when the version of the package is updated and a new version of the package can be provided. By receiving the update notification, it is possible to grasp the latest version number on the server side without periodically inquiring the latest version number from the package server 116. Also, by downloading and installing in advance when a new version becomes available, the latest version can be used quickly when an execution request occurs.

  FIG. 14 shows a procedure for registering update notification. When a request for registering an update notification is generated from the request generation unit 110, the system control unit 109 instructs the package management unit 108 to register an update notification. When the package is updated, the package management unit 108 requests the package management unit 120 of the package server 116 to register that in the terminal 101 (step E1). The update notification registration request includes the name of the target package for registering the update notification, and the package management unit 108 passes the name of the target package to the package management unit 120 of the package server 116 to register the update notification. Request.

  The update notification registration request can include the contents of processing executed when an update notification is received from the package server side. When the update notification registration request specifies the content to be executed when the update notification is received, the package management unit 108 registers the content in the terminal 101 (step E2). The contents to be executed when the update notification is received are requests to each means constituting the program or system. For example, when an update notification is received, the request generation unit 110 registers to the system control unit 109 that a download request is generated. In this case, when the package is updated in the package server 116, the terminal 101 can automatically download the updated version of the package.

  When receiving the update notification registration request, the package management unit 120 of the package server 116 records the name of the package that is the target of the update notification (step E3). At that time, the package management unit 120 records the update target package name and the request issuing terminal 101 in association with each other. By doing so, it is possible to specify a package for which an update notification is made for each terminal 101.

  The registration of a new package will be described. FIG. 15 shows a procedure for package registration. When the administrator of the package server 116 requests registration of a new package, the package management unit 120 creates a directory in the package storage directory 103 and registers a new package in the directory (step F1). The new package is given in the form of a difference from the first version or the previous version. The package given in the first version is a new package, and the package given by the difference from the previous version is an updated version of the existing package.

  The package management unit 120 registers information on the newly registered package in the database 119 (step F2). If the package to be registered is a new package, the package management unit 120 inserts a row into the table 1301 of the database 119, creates the table 1302, and registers information on the new package. If the new package is an updated version of the existing package, the table 1301 is referenced to identify the table 1302 corresponding to the existing package, and the contents of the updated version are registered in the table.

  The package management unit 120 determines whether or not the registered package is an update notification target (step F3). If the package is an update notification target package, a notification that the version of the package has been updated is sent to the requesting terminal 101 that requested the update notification registration (step F4). Upon receiving this notification, the package management unit 108 of the terminal 101 searches the contents to be executed when the update notification is received, registered in the update notification registration (FIG. 14), from the name of the updated package included in the update notification. Then, the contents are executed (step F5).

  Explain how to back up the execution environment. FIG. 16 shows a backup procedure of the execution environment. When the request generation unit 110 requests execution environment backup, the system control unit 109 requests the execution environment management unit 106 to back up the execution environment. In the execution environment backup request, the execution environment to be backed up is specified, and the system control unit 109 passes the name of the execution environment to be backed up to the execution environment management unit 106 and requests the backup.

  When the execution environment management unit 106 receives a backup request, the execution environment management unit 106 refers to the table 1403 of the database 107 and extracts an unbackup version or version difference directory group of update files in the execution environment (step G1). Thereafter, the extracted directory group is archived together with the corresponding row in the table 1401 of the database 107 and the tables 1402 and 1403 and transferred to the execution environment server 111 (step G2).

  When the execution environment management unit 115 of the execution environment server 111 receives the unbackup directory group and the archive of the database 107 from the terminal 101, the execution environment management unit 115 expands the received archive to the execution environment directory 112 and the database 114 from the terminal 101. The transmitted content (information) is saved (step G3). Thereby, the information held in the execution environment server 111 and the information held in the terminal 101 can be in the same state.

  The execution environment management unit 106 of the terminal 101 creates a new update file storage directory after transmitting the archive to the execution environment server 111, and uses the layer structure directory management unit 105 to store the created update file storage directory. Mount on the mount point used in the environment (step G4). Thereafter, the database 107 is updated (step G5). In step G5, a row is inserted into the table 1402 of the database 107, and the information is saved as a new version of the execution environment. At this time, the information stored in the table 1402 is the same as the previous version except that the version number is incremented by 1 and the newly created update file storage directory is added to the mount order item. is there. Also, information on the newly created update file storage directory is added to the table 1403, and the backup item is set to “done” for the update file storage directory that was backed up.

  Explain how to restore the execution environment. FIG. 17 shows a procedure for restoring the execution environment. When the request generation unit 110 requests the execution environment to be restored, the system control unit 109 requests the execution environment management unit 106 to restore the execution environment. In the execution environment restore request, the execution environment to be restored is specified, and the system control unit 109 passes the name of the execution environment to be restored to the execution environment management unit 106 and requests the restore.

  The execution environment management unit 106 requests the execution environment server 111 to transmit information on the update file storage directory stored in the execution environment backup (step H1). Upon receiving this request, the execution environment management means 115 of the execution environment server 111 refers to the database 114 to specify the storage location of the execution environment to be restored, and the contents of the update file storage directory to be restored from the execution environment directory 112. To get. Further, information related to the update file storage directory to be restored is extracted from the database 114, archived, and transmitted to the terminal 101 (step H2).

  When the execution environment management unit 106 of the terminal 101 receives the contents of the update file storage directory to be restored and the database information from the execution environment server 111, the execution environment management unit 106 expands the archive, and stores the directory structure at the time of backup in the execution environment directory 102. Restore. Further, the contents of the database 107 are restored to those at the time of backup (step H3). As a result, the execution environment is restored to the state of the execution environment at the time of backup.

  Inquiries about package download, installation, and the latest version number can be executed independently of the execution request processing (FIG. 11). When the request generation unit 110 generates these requests, the system control unit 109 uses the package management unit 108 to inquire about download, installation, and the latest version number in response to the request. Making these executable independently has the following advantages. In other words, when downloading or installing is performed in response to an execution request, it may take time until the program is actually executed after the execution request is generated. Therefore, the package update is periodically checked, the package is downloaded and installed in advance, and the package in the terminal 101 is updated. In this case, when an execution request is generated, it is not necessary to download and install a package, and the time until program execution can be shortened. Further, since the program can be executed without being connected to the package server 116, it is not necessary for the terminal 101 to be connected to the network at the time of execution request.

  When a periodic package update check is performed, first, a list listing packages to be subjected to the package update check is prepared. This list should include packages that are expected to be used in the future in addition to the packages currently in use. For the packages listed in the list, the latest version number in the package server 116 is acquired in the same procedure as in step B3 (FIG. 11), and this is compared with the version number of the package in the terminal 101. The latest version of the package is downloaded from the package server 116 in the same procedure as in step B5, and installation is performed in the same procedure as in step B8. At this time, if there is a package on which the latest version of the package depends, the package is also downloaded and installed as necessary.

  In the present embodiment, the package is stored in the package storage directory by dividing the directory by the original version of the package and the difference between the versions. When using the package, the layer structure directory management means is used. The package of the target version is configured by mounting the original version of the package and the difference between the versions on the mount point. In this way, when there are multiple versions of the same package, a desired version of the package can be configured. If there is a library shared from multiple programs, each program Can refer to another version of the library. In addition, by managing packages with differences, even when a package version is updated and a new version package is available, mounting the old version package keeps the package in the old version state. Can be used.

  In this embodiment, a layer structure management unit is used to configure an execution environment by superimposing an update file storage directory on a directory for storing packages. In this way, it is possible to distinguish between the program body part and the files that are updated as the program is executed. When backing up, an efficient backup can be performed by backing up the updated file storage directory. realizable. In addition, after backup, the new version (version difference) update file storage directory is overlaid on the backed up update file storage directory, and in the next backup, backup is performed for the unupdated new version update file storage directory. By doing so, the backup efficiency can be further increased.

  Next, a second embodiment of the present invention will be described. In the terminal management system of the second embodiment, each terminal 101 (FIG. 1) has the functions of the execution environment server 111 and the package server 116, and provides server functions to other terminals. More specifically, the execution environment management unit 106 provides functions such as execution environment backup and restoration to other terminals instead of the execution environment management unit 115 of the execution environment server 111. Further, the package management unit 108 provides functions such as package provision to other terminals instead of the package management unit 120 of the package server 116. Which terminal provides a server function to which terminal is determined in advance. Or you may determine dynamically according to the network connection condition between terminals.

  FIG. 18 shows a flow of requests and data in the terminal management system in this embodiment. In this example, the terminal B 1502 operates as a proxy for the terminal A 1501. That is, the terminal A 1501 issues a request such as a package download request and an execution environment backup / restore request to the terminal B 1502 instead of the execution environment server 111 and the package server 116. The terminal B 1502 provides a function as a server to the terminal A 1501 as a proxy for the execution environment server 111 and the package server 116.

  When the package management unit 108 of the terminal B 1502 receives a download request from the terminal A 1501 (corresponding to Step C1 in FIG. 12), it determines whether or not the requested package is stored in the package storage directory 103 of the terminal B 1502. . If it is stored, the processing of steps C2 to C4 is performed, and the requested package is stored in the terminal A1501. When the requested package does not exist in its own terminal, the download request received from the terminal A 1501 is transferred to the package server 116. In this case, the terminal A 1501 acquires a necessary package from the package server 116.

  When the package management means 108 of the terminal B 1502 receives an inquiry about the version number of the latest package from the terminal A 1501 (step B 3 in FIG. 11), the inquiry is transferred to the package server 116. When receiving an update notification registration request from the terminal A 1501 (step E1 in FIG. 14), the update notification registration is performed in the terminal B 1502, and the package server 116 is requested to register the update notification. At this time, the fact that the update notification is to be transmitted to the terminal A 1501 is registered as the content of the processing performed when the update notification is received from the package server 116. In this case, when the package is updated by the package server 116, the terminal A 1501 receives the update notification via the terminal B 1502 which is a proxy.

  When the package management unit 108 of the terminal B 1502 receives an execution environment creation request from the terminal A 1501 (corresponding to step A1 in FIG. 10), it registers information for backup of the execution environment in the database 107 and also executes the execution environment server. The creation request is transferred to 111. As a result, backup information is registered in the databases of both the terminal B 1502 as a proxy and the execution environment server 111. Also, when receiving an archive of a directory to be backed up from the terminal A 1501 (corresponding to step G2 in FIG. 16), the backup contents are stored in the database 107 and the execution environment directory 102, and then the received archive is stored in the execution environment server 111. Forward. As a result, the backup of the terminal A 1501 is stored in both the terminal B 1502 and the execution environment server 111. Since the terminal and the server have the same package storage directory and database structure, the terminal B 1502 simply adds the contents received from the terminal A 1501 to the execution environment directory 102 and the database 107.

  For a restore request from the terminal A 1501 (corresponding to step H1 in FIG. 17), the terminal B 1502 searches the execution environment directory 102 and the database 107, extracts the contents backed up from the terminal A 1501, and transmits this to the terminal A 1501. That's fine. If the terminal used by the terminal A 1501 as a proxy differs between the backup time and the restore time, the backup of the terminal A 1501 is not stored in the proxy. In that case, a terminal that stores a backup of the terminal A 1501 may be searched, a restore request may be transferred to the terminal, and restoration may be performed using a proxy at the time of backup. Alternatively, the restore request may be transferred to the execution environment server 111 and restored by the execution environment server 111.

  In the present embodiment, the terminal is operated as a proxy for the execution environment server and the package server, and access to the server is configured to go through the terminal that operates as a proxy. In this way, even when the terminal cannot be connected directly to the server or when access to the server is slow, using another terminal that acts as a proxy, backup of the execution environment and package You can download it. In addition, there is also an effect that server addition can be reduced by performing processing that should originally be performed by the server at the proxy terminal instead. Other effects are the same as those of the first embodiment.

  Subsequently, a third embodiment of the present invention will be described. In the present embodiment, the execution environment management means 106 mounts the directory group mounted on the mount point into one directory as appropriate. When combining a group of directories into one directory, first, a new directory for storing files on the mount point is created, and files on the mount point are copied to the directory. After that, the created directory is mounted on another mount point, and a directory for storing the update file is overlaid thereon.

  FIG. 19 shows an operation procedure when collecting directories. When the request generation unit 110 generates a layer combination request, the system control unit 109 requests the execution environment management unit 106 to combine directory groups. The layer combination request includes an execution environment name to be combined and a designation as to whether or not to delete the old update file storage directory after the combination. When the execution environment management unit 106 receives the layer combination request from the system control unit 109, the execution environment management unit 106 refers to the database 107 to check the latest version of the mount point of the execution environment to be combined, and to update the file on the mount point. Copy to the created directory (step I1). As a directory to be created at this time, for example, “/ execution environment + package /” is prepared separately from the execution environment directory 102 and the package storage directory 103 (FIG. 4), and is created thereunder.

  The execution environment management unit 106 creates a new mount point and a directory for storing the update file (step I2). After that, the directory in which the file is copied in step I1 and the created update file storage directory are mounted on the created mount point, and the execution environment is reconstructed (step I3). The version of the execution environment is updated by rebuilding the execution environment. After the mount to the mount point, if the deletion of the old update file storage directory is instructed by the layer combination request, the update file storage directory mounted on the mount point before the combination is deleted (step I4). When erasing is performed in step I4, the free capacity of the storage device can be expanded, but it cannot be executed in the old execution environment.

  FIG. 20 shows the state of the mount points before and after combining the directory group into one. FIG. 9A shows a state before the directory group is integrated into one, and the first version of the package A, the first version of the update file of the execution environment 3 and the package on the “mount point 4”. The difference between the first version and the second version of A and the difference between the first version and the second version of the update file of the execution environment 3 are mounted in this order. In this case, when viewed from the mount point 4, the package A to be used appears as the second version, and the version of the execution environment 3 (version of the update file storage directory) appears as the second version.

  The execution environment management means 106 creates a new directory and copies a file that can be seen from the mount point 4 to the created directory. At that time, by using the layer structure directory management means 105 to mount the directories on the mount point 4 in the order shown in FIG. 20A, for example, the difference between the first version of the package A and the package A When a file having the same file name exists in [first edition-second edition], only the difference [first edition-second edition] of package A is visible from the mount point 4, and the difference of package A [first edition] Only the 1st edition-2nd edition file is copied to the newly created directory.

  Assuming that the copy destination directory of the directory group mounted on the mount point 4 is “package A: second edition + execution environment 3: second edition”, the execution environment management means 106, as shown in FIG. This directory is mounted on the mount point 5 which is a new mount point. The execution environment management unit 106 further mounts the update file difference [second version-third version] of the execution environment 3 on the mount point 5 to create the third version of the execution environment 3. The directory “package A: second edition + execution environment 3: second edition” in FIG. 20B corresponds to the directory group mounted on the mount point 4 shown in FIG. The point 4 and the mount point 5 are equivalent in content.

  Returning to FIG. 19, the execution environment management unit 106 updates the contents of the database 107 by combining the directories on the mount point into one directory and mounting the directory on the new mount point together with the update file storage directory. (Step I5). In step I5, a line for storing information related to the updated version of the execution environment is added to the table 1402 of the database 107, and information related to the mount point and the mount order is stored in that line. In addition, when the old update file storage directory is deleted in step I4, the old version of the execution environment cannot be used. Therefore, the row corresponding to the old version of the execution environment is deleted from the table 1402.

  When updating the database 107, a line for storing information on the newly mounted update file storage directory on the combined directory is added to the table 1403, and information on the new update file storage directory is registered in that line. To do. At this time, the version of the execution environment is not a version difference but a single version (second version in the example of FIG. 20). In addition, the new update file storage directory is treated as an unbackup. When the old update file storage directory is deleted in step I4, the version line corresponding to the deleted directory is deleted from the table 1403.

  In the present embodiment, a plurality of directories mounted on the mount point are appropriately combined into one directory. In this way, the number of directories mounted on the mount point can be reduced, the processing load of the layered directory management means can be reduced, and the execution speed can be improved. In other words, reducing the number of directories on the mount point can reduce performance degradation due to the large number of directories.

  In addition, when a file with the same name exists among multiple directories mounted on the same mount point, only the latest one file is actually used, but the same name is used in each directory. Files are held, but when these directories are combined into one, only one file is held, and the disk capacity to be used can be reduced. Other effects are the same as those of the first embodiment.

  Then, the structure which operates a terminal and each server with a computer program is demonstrated. FIG. 21 shows the configuration. Terminal A 180 and terminal B 181 correspond to terminal 101 in FIG. The terminal A180 and the terminal B181 have a computer A1801 and a computer B1803, respectively. The computer A 1801 and the computer B 1803 operate based on computer programs stored in the recording media 1802 and 1804, and realize operations similar to the operations of the terminal 101 described in the first to third embodiments.

  The execution environment server 182 and the package server 183 have a computer C1805 and a computer D1807, respectively. A computer C 1805 and a computer D 1807 operate based on computer programs stored in the recording media 1806 and 1808, and realize the same operations as the operations of the execution environment server 111 and the package server 116 described in the first to third embodiments. To do.

  For restoration, for example, when restoring the second version of the execution environment, the first version of the update file storage directory and the difference [first version-second version] are acquired from the execution environment server 111. These are mounted on the mount point, but the restoration method is not limited to this. For example, in the execution environment server 111, the first version of the update file storage directory and the difference [first version-second version] are mounted on the temporary directory using the layer structure directory management unit 113, and the The content of the temporary directory may be transmitted to the terminal 101, and the terminal 101 may mount the received single version update file storage directory (second version) on the mount point.

  As described above, the present invention has been described based on the preferred embodiments. However, the terminal management system, method, and program of the present invention are not limited to the above-described embodiments. Those modified and changed as described above are also included in the scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be applied to uses such as mobile phones, information appliances, car navigation systems, and terminal groups such as POS terminals and Kiosk terminals in stores. Moreover, it is applicable not only to a terminal but also to managing a plurality of server groups in a data center.

The block diagram which shows the structure of the terminal management system of 1st Embodiment of this invention. The schematic diagram for demonstrating the function of a layer structure directory management means. The schematic diagram for demonstrating the function of a directory isolation | separation means. The figure which shows the directory structure in the recording device of a terminal. The figure which shows the specific example of the information regarding the package which a database memorize | stores. The figure which shows the specific example of the information regarding the execution environment which a database memorize | stores. (A) shows the mount state in the execution environment 1 before backup, and (b) in the figure shows the mount state in the execution environment 1 after backup. The figure which shows the directory layer structure in the execution environment 2. FIG. (A) And (b) is a figure which shows the directory layer structure of the execution environment 3 before and after updating the version of a package. The flowchart which shows the procedure at the time of creating an execution environment. The flowchart which shows the procedure in the case of program execution. The flowchart which shows the procedure at the time of downloading a package from a server. The flowchart which shows the operation | movement procedure of the execution environment management means at the time of installation. The flowchart which shows the procedure in the case of update notification registration. The flowchart which shows the procedure in the case of package registration. The flowchart which shows the procedure of backup of an execution environment. The flowchart which shows the procedure of restoration of an execution environment. The block diagram which shows the flow of the request | requirement in the terminal management system in 2nd Embodiment of this invention, and data. The flowchart which shows the operation | movement procedure at the time of putting together the directory on a mount point. (A) And (b) is a figure which shows the mode of the mount point before and behind combining a directory group into one. The block diagram which shows the structure of the terminal management system using a computer.

Explanation of symbols

100: terminal management system 101: terminal 102, 112: execution environment directory 103, 117: package storage directory 104: directory isolation means 105, 113, 118: layer structure directory management means 106, 115: execution environment management means 107, 114, 119: Database 108, 120: Package management means 109: System control means 110: Request generation means 111: Execution environment server 116: Package servers 1301, 1302, 1401 to 1403: Table

Claims (108)

In a terminal management system having a terminal device, an execution environment server for storing a backup of the terminal device, and a package server for providing a package to the terminal device,
The terminal device is
Package management means for storing and managing a plurality of versions of a package in a storage device by dividing the directory by the original version and the difference between the versions;
A layer structure directory management means having a function of mounting a plurality of directories on a mount point directory while having a layer structure;
The terminal device uses the layer structure directory management means to configure a package of a target version from a version that is a source of a package that is stored separately in the storage device and a difference between the versions. A terminal management system.   2. The terminal device mounts the original version of the package and the difference between the versions on a specific directory using the layer structure directory management unit, and configures the package of the target version. The terminal management system described in 1.   The execution environment management means which comprises an execution environment by the package of the said target version comprised and the update file preservation | save directory for preserve | saving the file created / updated with execution of a program is further provided. Or the terminal management system of 2.   The execution environment management means uses the layer structure directory management means to mount a source version of the package and a difference between the versions on a directory that is a mount point, and configures a package of a target version. The terminal management system according to claim 3, wherein the execution environment is configured by mounting the update file storage directory on the configured target version package.   5. The execution environment management unit, after configuring the execution environment, uses a directory isolation unit to isolate a directory as a mount point in the execution environment and execute an installation program for the target version of the package. The terminal management system described in 1.   When the execution environment is configured, the execution environment management means includes information related to the mount point corresponding to the execution environment and the mount order of the directory to the mount point, and information related to the update file storage directory corresponding to the execution environment. The terminal management system according to claim 4 or 5, wherein execution environment information is stored in a database.   The terminal management system according to claim 6, wherein the information regarding the update file storage directory includes information indicating whether or not the update file storage directory has been backed up.   When the execution environment management unit receives a backup request for the execution environment, the execution environment management unit refers to the execution environment information, extracts an unbackup backup file storage directory from the update file storage directory, and stores the extracted update file The terminal management system according to claim 7, wherein a directory is transmitted to the execution environment server.   9. The terminal management system according to claim 8, wherein when the execution environment server receives an update file storage directory from the terminal device, the execution environment server stores the content of the received update file storage directory in a storage device.   When the execution environment server stores the contents of the received update file storage directory in a storage device, the database in the execution environment server includes information on the directory storing the contents of the update file storage directory. The terminal management system of Claim 9 which memorize | stores environmental information.   The said execution environment management means mounts a new update file storage directory on the mount point corresponding to the said execution environment using the said layer structure directory management means after backup of the said update file storage directory. The terminal management system described.   When the execution environment server receives a restore request for the backed up execution environment from the terminal device, the execution environment server refers to the execution environment information in the server and extracts a directory for storing the contents of the update file storage directory to be restored. The terminal management system according to claim 10 or 11, wherein the contents of the extracted directory are transmitted to the terminal device.   When the terminal device operates as a proxy of the execution environment server and the execution environment management means of the terminal device operating as the proxy receives the update file storage directory from the backup source terminal device, the received update file storage directory In the storage device, and in the database, the other terminal execution environment information including information on the directory storing the contents of the update file storage directory is stored, and the received update file is stored in the execution environment server. The terminal management system according to claim 12, wherein the content of the storage directory is transferred.   Upon receiving a restore request from another terminal device, the terminal device operating as the proxy refers to the other terminal execution environment information and stores a directory for storing the contents of the update file storage directory to be restored from the storage device. The terminal management system according to claim 13, wherein the terminal management system extracts the contents of the extracted directory and transmits the contents of the extracted directory to the terminal device that issued the restore request.   The terminal management system according to claim 6, wherein the execution environment management unit isolates an environment in which a program is executed for each execution environment using a directory isolation unit.   The execution environment management means creates a directory as a new mount point when updating the version of the package used in the execution environment to a version newer than the version of the package currently used. The directory mounted on the mount point directory corresponding to the execution environment is checked with reference to the execution environment information, and the layer structure directory management unit is used to mount the mount corresponding to the execution environment on the created directory. The terminal management system according to any one of claims 6 to 15, wherein a directory mounted on a point, a version difference corresponding to the new version, and a new update file storage directory are mounted.   When the execution environment management means receives a layer combination request for bringing together a group of directories mounted on a mount point for the execution environment, the execution environment management means creates a directory for storing the combined contents, 17. The mount point corresponding to the execution environment is identified with reference to the execution environment information, and the contents of the directory viewed from the identified mount point are copied to the created directory. Terminal management system.   When the execution environment management means receives the layer combination request, it creates a directory to be a new mount point and an update file storage directory, and uses the layer structure directory management means to create a directory viewed from the specified mount point. The terminal management system according to claim 17, wherein the directory in which the contents of the file are copied and the created new update file storage directory are mounted on the created directory as a new mount point.   The terminal according to any one of claims 3 to 18, wherein the package server stores a plurality of versions of a package in a storage device by dividing a directory by a first version of the package and a difference between the versions. Management system.   The terminal device refers to a database that stores package information including information related to package versions or version differences stored in a storage device in the terminal device, and the target version package is a version or version difference in the terminal device. The terminal management system according to claim 19, wherein it is determined whether or not it can be configured, and if it is determined that it cannot be configured, the package server is requested to download a necessary version or version difference.   Upon receiving a download request from the terminal device, the package server refers to a database that stores package information in the server including information for specifying a directory for storing the version and version difference of each package, and the terminal device Using the layer structure directory management means having the function of extracting a directory required for configuring the version or version difference requested from, and mounting a plurality of directories on the mount point directory while having a layer structure, The terminal management system according to claim 20, wherein the extracted directory is mounted on a directory serving as a mount point, and the contents of the mount point directory are transmitted to the terminal device.   The terminal management according to claim 21, wherein when receiving the contents of the mount point directory transmitted from the package server, the package management means stores the received contents in the storage device as a new version or a version difference. system.   When the terminal device operates as a proxy of the package server, and the package management means of the terminal device operating as the proxy receives a download request from the terminal device of the download request, the terminal device downloads with reference to the package information A directory necessary for constructing the requested version or version difference is extracted, and the extracted directory is mounted on a directory serving as a mount point by using the layer structure directory management unit, and the mount point directory The terminal management system according to any one of claims 20 to 22, wherein contents are transmitted to the terminal device that is the download request source.   The terminal device operating as the proxy forwards the download request received from the download request source terminal device to the package server when the directory required for configuring the download requested version or version difference cannot be extracted. The terminal management system according to claim 23.   The terminal according to any one of claims 20 to 24, wherein the information about the version or version difference of the package includes information indicating whether or not a directory corresponding to the version or version difference is used in the execution environment. Management system.   When the package management means is instructed from the storage device to delete the original version of the package or the directory that stores the version difference, the package management means refers to the package information and checks whether the directory is in use. The terminal management system according to claim 25, wherein the directory to be erased is erased from the storage device when not in use.   The package management means transmits to the package server that notification is required when there is a new package registration that can be provided on the server side, and is executed by the terminal device when the notification is received. The terminal management system according to any one of claims 19 to 26, wherein content registration is performed.   When the package server receives notification that the notification is required from the terminal device, the package server stores the notification required, and when a version or version difference of a package that can be newly provided is registered in the storage device, 28. The terminal management system according to claim 27, wherein information indicating that a new package version or version difference can be provided is transmitted to the terminal device.   29. The terminal management system according to claim 28, wherein the package management means executes the registered contents to be executed when receiving from the package server that a new package version or version difference can be provided. . Package management means for storing and managing a plurality of versions of a package in a storage device by dividing the directory by the original version and the difference between the versions;
A layer structure directory management means having a function of mounting a plurality of directories on a mount point directory while having a layer structure;
A terminal device comprising the layer structure directory management means, wherein a package of a target version is configured from a base version of a package stored separately in a directory in the storage device and a difference between the versions.   In the configuration of the target version of the package, the layer structure directory management means is used to mount the original version of the package and the difference between the versions on a specific directory, thereby configuring the target version of the package. The terminal device according to claim 30.   31. The information processing apparatus according to claim 30, further comprising: an execution environment management unit that configures an execution environment by using the configured target version package and an update file storage directory for storing a file created / updated as the program is executed. Or the terminal device of 31.   The execution environment management means uses the layer structure directory management means to mount a source version of the package and a difference between the versions on a directory that is a mount point, and configures a package of a target version. 33. The terminal device according to claim 32, wherein the execution environment is configured by mounting the update file storage directory on a configured target version package.   The execution environment management means, after the execution environment is configured, uses a directory isolation means to isolate a directory as a mount point in the execution environment and execute an installation program for the target version of the package. The terminal device described in 1.   When the execution environment is configured, the execution environment management means includes information related to the mount point corresponding to the execution environment and the mount order of the directory to the mount point, and information related to the update file storage directory corresponding to the execution environment. The terminal device according to claim 33 or 34, wherein execution environment information is stored in a database.   36. The terminal device according to claim 35, wherein the information related to the update file storage directory includes information indicating whether or not the update file storage directory has been backed up.   When the execution environment management unit receives a backup request for the execution environment, the execution environment management unit refers to the execution environment information, extracts an unbackup backup file storage directory from the update file storage directory, and stores the extracted update file 37. The terminal apparatus according to claim 36, wherein the directory is transmitted to an execution environment server that stores a backup of the execution environment in the terminal apparatus.   The execution environment management unit mounts a new update file storage directory on a mount point corresponding to the execution environment using the layer structure directory management unit after transmitting the update file storage directory to the execution environment server. The terminal device according to claim 37.   When the execution environment management means of the terminal device operating as a proxy of the execution environment server receives the update file storage directory from the backup source terminal device, the storage device stores the contents of the received update file storage directory. And storing other terminal execution environment information including information on the directory storing the contents of the update file storage directory in the database, and storing the contents of the received update file storage directory in the execution environment server. The terminal device according to claim 37 or 38, wherein the terminal device is transferred.   When the execution environment management unit of the terminal device operating as the proxy receives a restore request from another terminal device, the execution environment management means refers to the other terminal execution environment information, and the contents of the update file storage directory to be restored from the storage device 40. The terminal device according to claim 39, wherein a directory for storing the file is extracted, and the contents of the extracted directory are transmitted to the terminal device that issued the restore request.   41. The terminal device according to claim 35, wherein the execution environment management unit isolates an environment in which a program is executed for each execution environment using a directory isolation unit.   The execution environment management means creates a directory as a new mount point when updating the version of the package used in the execution environment to a version newer than the version of the package currently used. The directory mounted on the mount point directory corresponding to the execution environment is checked with reference to the execution environment information, and the layer structure directory management unit is used to mount the mount corresponding to the execution environment on the created directory. The terminal device according to any one of claims 35 to 41, wherein a directory mounted on the point, a version difference corresponding to the new version, and a new update file storage directory are mounted.   When the execution environment management means receives a layer combination request for bringing together a group of directories mounted on a mount point for the execution environment, the execution environment management means creates a directory for storing the combined contents, 43. The mount environment corresponding to the execution environment is identified with reference to the execution environment information, and the contents of the directory viewed from the identified mount point are copied to the created directory. Terminal equipment.   When the execution environment management means receives the layer combination request, it creates a directory as a new mount point, and uses the layer structure directory management means to create the directory for storing the combined contents 44. The terminal device according to claim 43, wherein the terminal device is mounted on a directory that becomes a new mount point.   A package of a target version can be configured using a version or version difference in the terminal device with reference to a database that stores package information including information about the version or version difference of the package stored in the storage device in the terminal device. If it is determined whether or not it can be configured, a plurality of versions of the package are stored in a storage device by dividing a directory by the first version of the package and a difference between the versions, and the package is stored in the terminal device. 45. The terminal device according to any one of claims 32 to 44, which requests a download of a necessary version or version difference from a package server that provides the information.   The terminal device according to claim 45, wherein the package management unit receives the necessary version or version difference from the package server and stores the received version or version difference in a storage device.   The package management means of the terminal device that operates as a proxy of the package server and receives the download request from the download request source terminal device refers to the package information and receives the download requested version or A directory necessary for constituting a version difference is extracted, the extracted directory is mounted on a directory serving as a mount point using the layered structure directory management means, and the contents of the mount point directory are downloaded as the download point. 47. The terminal device according to claim 45 or 46, which transmits to a requesting terminal device.   When the package management means of the terminal device operating as the proxy cannot extract a directory required for configuring the download requested version or version difference, the download request received from the download request source terminal device is The terminal device according to claim 47, wherein the terminal device is transferred to a package server.   The terminal according to any one of claims 45 to 48, wherein the information about the version or version difference of the package includes information indicating whether a directory corresponding to the version or version difference is used in the execution environment. apparatus.   When the package management means is instructed from the storage device to delete the original version of the package or the directory that stores the version difference, the package management means refers to the package information and checks whether the directory is in use. The terminal device according to claim 49, wherein the directory to be erased is erased from the storage device when not in use.   The package management means transmits to the package server that notification is required when there is a new package registration that can be provided on the server side, and is executed by the terminal device when the notification is received. The terminal device according to any one of claims 45 to 50, which registers content.   52. The terminal device according to claim 51, wherein the package management unit executes the registered content to be executed when receiving a notification that a new package version or version difference can be provided from the package server. Package management means for storing and managing a plurality of editions of a package in a storage device by dividing a directory by the first edition of the package and the difference between each edition ,
When receiving a download request from the terminal device, the package management means refers to a database that stores in-server package information including information for specifying a directory for storing the version and version difference of each package, and the terminal device Using the layer structure directory management means having the function of extracting a directory required for configuring the version or version difference requested from, and mounting a plurality of directories on the mount point directory while having a layer structure, A package server , wherein the extracted directory is mounted on a directory serving as a mount point, and the contents of the mount point directory are transmitted to the terminal device . When the package management means receives notification that a notification is required when there is a version or version difference of a package that can be newly provided on the server side from the terminal device, the package management means stores that the notification is required and stores the notification in the storage device. When the plate or plate differential newly providable and became the package is registered, the effect plate or the plate difference of the new package has become possible to provide, and transmits to the terminal device, according to claim 53 Package server. A terminal management method for managing computers that use packages,
The computer is a source of a package that is divided and stored in a storage device using layer structure directory management means having a function of mounting a plurality of directories on a mount point directory while having a layer structure. A terminal management method comprising configuring a package of a target version from a version and a difference between versions. 56. The computer according to claim 55 , wherein the computer mounts the original version of the package and the difference between the versions on a specific directory using the layer structure directory management unit, and configures the target version of the package. The terminal management method as described. 57. The computer according to claim 55 or 56 , wherein the computer configures an execution environment by the configured target version package and an update file storage directory for storing a file created and updated as the program is executed. The terminal management method as described. The computer uses the layer structure directory management means to mount the original version of the package and the difference between the versions on the directory that is the mount point, and configures the target version of the package. 58. The terminal management method according to claim 57 , wherein the execution environment is configured by mounting the update file storage directory on a version of the package. 59. The computer according to claim 58 , wherein, after the execution environment is configured, the directory isolation unit is used to isolate a directory as a mount point in the execution environment and execute an installation program for the target version of the package. Device management method. When the computer configures the execution environment, the execution environment information includes information related to the mount point corresponding to the execution environment and the mount order of the directory to the mount point, and information related to the update file storage directory corresponding to the execution environment. 60. The terminal management method according to claim 58 or 59 , wherein the terminal management method is stored in a database. 61. The terminal management method according to claim 60 , wherein the information related to the update file storage directory includes information indicating whether or not the update file storage directory has been backed up. When the computer receives the execution environment backup request, the computer refers to the execution environment information, extracts the update file storage directory that is not backed up from the update file storage directory, and extracts the extracted update file storage directory. 62. The terminal management method according to claim 61 , wherein the terminal management method is transmitted to an execution environment server for storing a backup of the execution environment. 64. The terminal management method according to claim 62 , wherein when the execution environment server receives the update file storage directory, the execution environment server stores the content of the received update file storage directory in a storage device. When the execution environment server stores the contents of the received update file storage directory in a storage device, the database in the execution environment server includes information on the directory storing the contents of the update file storage directory. 64. The terminal management method according to claim 63 , wherein environmental information is stored. The terminal according to claim 64 , wherein after the backup of the update file storage directory, the computer mounts a new update file storage directory on a mount point corresponding to the execution environment using the layered structure directory management means. Management method. When the execution environment server receives a restore request for a backed up execution environment from the computer, the execution environment server refers to the execution environment information in the server and extracts a directory for storing the contents of the update file storage directory to be restored, 66. The terminal management method according to claim 64 or 65 , wherein the contents of the extracted directory are transmitted to the computer. When the computer operates as a proxy of the execution environment server, and the computer operating as the proxy receives the update file storage directory from the backup source computer, the computer stores the contents of the received update file storage directory in the storage device. And storing other terminal execution environment information including information on the directory storing the contents of the update file storage directory in the database, and transferring the contents of the received update file storage directory to the execution environment server. The terminal management method according to claim 66 . Upon receiving a restore request from another computer, the computer operating as the proxy extracts the directory storing the contents of the update file storage directory to be restored from the storage device with reference to the other terminal execution environment information. 68. The terminal management method according to claim 67 , wherein the contents of the extracted directory are transmitted to the computer that issued the restore request. The terminal management method according to any one of claims 60 to 68 , wherein the computer uses a directory isolation unit to isolate an environment in which a program is executed for each execution environment. When updating the version of the package used in the execution environment to a version newer than the version of the package currently used, the computer creates a directory that becomes a new mount point, and The directory mounted on the mount point directory corresponding to the execution environment is checked by referring to the information, and the layer structure directory management unit is used to check the directory mounted on the mount point corresponding to the execution environment. 70. The terminal management method according to any one of claims 60 to 69 , further comprising: mounting a directory mounted on the server, a version difference corresponding to the new version, and a new update file storage directory. When the computer receives a layer combination request for bringing together a group of directories mounted on a mount point for the execution environment, the computer creates a directory for storing the combined contents, and the execution environment information The terminal management according to any one of claims 60 to 70 , wherein a mount point corresponding to the execution environment is identified with reference to and the contents of the directory viewed from the identified mount point are copied to the created directory. Method. Upon receipt of the layer combination request, the computer creates a directory to be a new mount point and an update file storage directory, and uses the layer structure directory management means to display the contents of the directory viewed from the specified mount point. 72. The terminal management method according to claim 71 , wherein the copied directory and the created new update file storage directory are mounted on the created directory as a new mount point. The terminal according to any one of claims 57 to 72 , wherein the package server stores a plurality of versions of a package in a storage device by dividing a directory by a first version of the package and a difference between the versions. Management method. The computer refers to a database that stores package information including information about the version or version difference of the package stored in the storage device in the terminal, and the target version package uses the version or version difference in the terminal. 74. The terminal management method according to claim 73 , wherein it is determined whether or not configuration is possible, and if it is determined that configuration is not possible, the package server is requested to download a necessary version or version difference. When the package server receives a download request from the computer, the package server makes a request from the computer by referring to a database that stores package information in the server including information for specifying a directory for storing the version and version difference of each package. The directory necessary for composing the version or version difference is extracted, and the directory is extracted by using a layer structure directory management means having a function of mounting a plurality of directories on the mount point directory while having a layer structure. 75. The terminal management method according to claim 74 , wherein a directory is mounted on a directory serving as a mount point, and the contents of the mount point directory are transmitted to the computer. The terminal management method according to claim 75 , wherein when receiving the contents of the mount point directory transmitted from the package server, the computer stores the received contents in a storage device as a new version or a version difference. When the computer operates as a proxy of the package server, and the computer operating as the proxy receives a download request from the download request source computer, the computer refers to the package information and download requested version or version difference The directory necessary for configuring the file is extracted, and the extracted directory is mounted on the directory serving as the mount point by using the layer structure directory management means, and the contents of the mount point directory are converted into the download request source. 77. The terminal management method according to any one of claims 74 to 76 , which is transmitted to the computer. When the computer operating as the proxy cannot extract the directory required for configuring the download requested version or version difference, the download request received from the download request source computer is transferred to the package server. The terminal management method according to claim 77 . The terminal according to any one of claims 74 to 78 , wherein the information related to the version or version difference of the package includes information indicating whether or not a directory corresponding to the version or version difference is used in the execution environment. Management method. When the computer is instructed by the storage device to delete the original version of the package or the directory that stores the version difference, the computer refers to the package information to check whether the directory is in use. The terminal management method according to claim 79 , wherein if not, the directory to be deleted is deleted from the storage device. The computer transmits to the package server that a notification is required when there is a package registration that can be newly provided on the server side, and registration of contents to be executed by the computer when the notification is received The terminal management method according to any one of claims 73 to 80 , wherein: When the package server receives notification from the computer that notification is required, the package server stores that notification is required, and when a new version or version difference of a package that can be newly provided is registered in the storage device, 84. The terminal management method according to claim 81 , wherein information indicating that a package version or version difference can be provided is transmitted to the computer. 83. The terminal management method according to claim 82 , wherein the computer executes the registered contents to be executed upon receiving from the package server that a new package version or version difference can be provided. The computer that controls the terminal device,
Package management means for storing and managing a plurality of versions of a package in a storage device by dividing a directory by the original version and the difference between the versions,
A layer structure directory management means having a function of mounting a plurality of directories on a mount point directory while having a layer structure ;
Using the layer structure directory management unit, configuring means for configuring the object version of the package from the difference between the underlying plate and the plate in which the packages are stored separately directory in the storage device, for causing functioning as program. Before SL layer structure directory management means, on a particular directory, and mount the difference between the plate and the plate which is the source of the package, constitutes the plate package of the target, the program of claim 84. The computer, and the package version of the constructed object, as an execution environment managing means constituting an execution environment by the update file storage directory for storing files that are created and updated along with the execution of a package of programs 86. The program according to claim 84 or 85 for further functioning . The execution environment management means uses the layer structure directory management means to mount a source version of the package and a difference between the versions on a directory that is a mount point, and configures a package of a target version. 87. The program according to claim 86 , wherein the execution environment is configured by mounting the update file storage directory on a configured target version package. The execution environment management means forms the execution environment Then, using a directory isolation means to isolate a directory to be the mount point in the execution environment, to run the installation program of the target version of the package, according to claim The program according to 87 . The execution environment management means includes, after the execution environment is configured, information related to the mount point corresponding to the execution environment and the mount order of the directory to the mount point, and information related to the update file storage directory corresponding to the execution environment. the execution environment information, you stored in a database, the program according to claim 87 or 88. 90. The program according to claim 89 , wherein the information related to the update file storage directory includes information indicating whether or not the update file storage directory has been backed up. The execution environment management means, upon receiving a backup request of the execution environment, referring to the previous Symbol execution environment information, the update to extract the non-backup update file storage directory of one of the file storage directory, extract out the update file the storage directory, that sends the execution environment server for storing backup execution environment, program of claim 90. The execution environment managing means after the backup of the update file storage directory, by using the layer structure directory management means, you mount a new update file storage directory on the mount point corresponding to the execution environment, according to claim 91 The program described in. The execution environment management unit receives the update file storage directory from the backup source computer, stores the contents of the update file storage directory thus received in the storage device, in the database, the content of the update file storage directory stores the other terminal execution environment information including information on the stored directory, the execution environment server, to forward the contents of the received update file storage directory, program according to claim 91 or 92. The computer receives a restoration request from another computer, with reference to the previous SL other terminal execution environment information, extracts the directory for storing contents to be restored in the update file storage directory from said storage device, said extraction 94. The program according to claim 93 , further causing a transmission unit to transmit the contents of the directory thus transmitted to the computer that issued the restore request. The execution environment managing means uses the directory isolation means, it isolates the environment to run the package program for each of the execution environment, program according to any one of claims 89-94. The execution environment management means creates a directory as a new mount point when updating the version of the package used in the execution environment to a version newer than the version of the package currently used. The directory mounted on the mount point directory corresponding to the execution environment is checked with reference to the execution environment information, and the layer structure directory management unit is used to correspond to the execution environment on the created directory. a directory that is mounted on a mount point, you further mount plate differential and new update file storage directory corresponding to the new edition, the program according to any one of claims 89 to 95. The execution environment managing means for said execution environment, receives a layer binding request to summarize the mounted directory group on the mount point to one, create a directory for storing the contents after binding, the Referring to the execution environment information specifying a mount point corresponding to the execution environment, to copy the contents of the directory as seen from the mount point to the specified directory that the created, to any one of claims 89-96 The listed program. The execution environment management unit receives the layer binding request to create a directory and update file storage directory as a new shelf mount point, by using the layer structure directory management unit, viewed from the mount point and the specific and directories to copy the contents of a directory, and a new update file storage directory that the created, that mounts on the directory as a new mount point the created, the program of claim 97. The computer, with reference to the database that stores the package information including information on a plate or a plate difference of the stored packages in the storage device, using a plate or plate differential package version of the package of interest is the storage Claim for further functioning as a request means for requesting a download of a required version or version difference to a package server that provides a package to the terminal. 86. The program according to any one of 86 to 98 . The computer receives the package transmitted from the package server, according to claim 99 for further functions as a package storage means for storing in said storage device for packages thus received as a new version or versions difference program. The computer receives a download request from another computer functioning as the request unit, with reference to the previous SL package information, extracts the directory needed to configure the plate or plate differential downloaded requested, the A request for mounting the extracted directory on a directory serving as a mount point using the layered directory management unit, and further causing the contents of the mount point directory to function as a directory transmission unit for transmitting to the other computer. Item 99. The program according to item 99 or 100 . Before the Kiko computer, the when the directory needed to configure the downloaded requested version or versions difference can not be extracted further features a download request received from the other computer, as a transfer means for transferring the package server 102. The program according to claim 101 for causing the program to occur. The program according to any one of claims 99 to 102 , wherein the information about the version or version difference of the package includes information indicating whether or not a directory corresponding to the version or version difference is used in the execution environment. . The package management unit is instructed to erase the directory for storing the underlying plate or plate differential packages from the storage device, whether the directory with reference to the previous SL package information is in use examined, when not in use, you erase a directory to be erased from the storage device, the program of claim 103. The package management means transmits to the package server that notification is required when there is a new package registration that can be provided on the server side, and is executed by the computer when the notification is received. to execute processing for registering the content of the program according to any one of claims 99 to 104. The package management unit is operable, when the plate or plate difference of the new package from the package server receives that became possible to provide, to execute the process of executing the content to be executed, which is pre-Symbol registered to claim 105 The listed program. A program for causing a computer to function as a package management means for storing and managing a plurality of editions of a package, a first edition of the package, and a directory in a difference between each edition in a storage device ,
When receiving a download request from the terminal device , the package management means refers to a database that stores in-server package information including information for specifying a directory for storing the version and version difference of each package, and the terminal device Using the layer structure directory management means having the function of extracting a directory required for configuring the version or version difference requested from, and mounting a plurality of directories on the mount point directory while having a layer structure, the extracted directory and mounted on a mount point directory, the contents of the mount point directory, and transmits to the terminal device, wherein the to Help program that. The package management unit receives the effect that requires notification of any plate or plate differential newly providable package at the server from the terminal device stores the fact that require the notification, in the storage device When the plate or plate differential newly providable and became the package is registered, the effect plate or the plate difference of the new package has become possible to provide, that sends to the terminal device, according to claim 107 of the program.

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