KR101211207B1 - Cache system and caching service providing method using structure of cache cloud - Google Patents

Abstract

Disclosed are a cache system and a caching service providing method using a cache cloud structure. The cache system includes a switch for distributing and receiving requests from a plurality of clients to a plurality of proxy nodes, a plurality of proxy nodes and a plurality of proxy nodes for forwarding requests received from the switch to at least one cache node of the plurality of cache nodes. And a plurality of cache nodes for processing requests received from at least one proxy node.

Description

CACHE SYSTEM AND CACHING SERVICE PROVIDING METHOD USING STRUCTURE OF CACHE CLOUD}

Embodiments of the present invention relate to a cache system and a caching service providing method using a cache cloud structure.

In the caching solution according to the related art, each client has a structure connected to all the cache servers required. At this time, if a problem occurs in the cache server, the client should identify the problem directly and hash it using the cache server list independently. Here, the client refers to a system using a cache solution. For example, in a general web system, the client may mean a web server or a web application server (WAS).

That is, a client-driven fault-tolerance that adds additional functionality to the entire client is essential because the client using the caching solution must solve the cache server problem. In addition, when each client independently maintains a cache server list, a consistency problem occurs in a distributed hash table. For example, there is a problem that hashes for the same key can be matched to different cache servers.

Thus, there is a growing demand for the introduction of more secure and efficient cache technology.

Provided are a cache system and a caching service providing method capable of providing a caching service by accessing a cache cloud without requiring a client to individually access each of a plurality of cache servers.

There is provided a cache system and a caching service providing method capable of receiving a caching service without adding a separate configuration to a client.

Provided are a cache system and a caching service providing method that guarantees consistency even when a failure occurs between a client and a cache server using a proxy server.

By managing the cache cloud through a separate management configuration, there is no need to consider the scalability of the cache cloud in the client, and using the management configuration to monitor the statistical information and resource status of the proxy server or the cache server in real time to generate a failure A cache system and a caching service provision method are provided to prevent a problem and to continuously improve a service quality.

At least one of a plurality of proxy nodes and a plurality of proxy nodes for distributing and receiving a request received from a plurality of clients to a plurality of proxy nodes, a plurality of proxy nodes for forwarding a request received from the switch to at least one of the plurality of cache nodes A cache system is provided that includes a plurality of cache nodes that process a request received from a proxy node of.

According to one side, each of the plurality of proxy nodes to select at least one cache node based on the cache server list, the proxy server for sending a request to the cache node, the application initialization, start and shutdown, monitoring and HB of the proxy server And a node controller for controlling at least one of the Beats and an information collector for monitoring statistical resources of the proxy node to generate statistical information.

According to another aspect, each of the plurality of cache nodes includes at least one of a plurality of cache servers storing data on demand or providing data on request, application initialization, startup and shutdown, monitoring, and HB of each of the plurality of cache servers. It may include a node control unit for controlling the information collection unit for generating statistical information by monitoring the resources of the cache node.

According to another aspect, the cache system may further include a management node managing a plurality of proxy nodes and a plurality of cache nodes based on data received from the plurality of proxy nodes and the plurality of cache nodes. In this case, the management node may include a message relay unit for transmitting the information received from the node control unit included in the plurality of proxy nodes and the plurality of cache nodes to the management control unit, and the plurality of proxy nodes based on the information received through the message relay unit. A management control unit for identifying a state of the plurality of cache nodes and providing start and end commands for each of the plurality of proxy nodes and the plurality of cache nodes, and an information collection unit each of the plurality of proxy nodes and the plurality of cache nodes; It may include a monitoring unit for generating statistical information by using the received information, a user interface unit for communicating with a manager terminal connected via a network, and a database for storing information generated by the management control unit and the monitoring unit.

At least one of a proxy server that receives a client's request from the switch and sends the request to at least one cache node selected based on the cache server list among the plurality of cache nodes, application initialization, startup and shutdown, monitoring, and HB of the proxy server. Provided is a proxy system including a node controller for controlling the information and an information collector for monitoring the system resources and generating statistical information.

And a switch and a proxy server and a plurality of cache nodes, respectively, for distributing and forwarding a request received from a plurality of clients to a plurality of combo nodes, and at least one cache of the plurality of cache servers through the proxy server. A cache system is provided that includes a plurality of combo nodes for delivering to a server.

Distributing and forwarding a request received from a plurality of clients at a switch to a plurality of proxy nodes, forwarding a request received from the switch at a proxy node to at least one cache node of the plurality of cache nodes, and at the cache node A caching service providing method is provided that includes processing a request received from at least one proxy node of the proxy nodes.

Distributing and forwarding a request received from a plurality of clients at a switch to a plurality of combo nodes; at least one of a plurality of cache servers connected to the combo node through a proxy server including a combo node at the combo node; A method of providing a caching service is provided, the method comprising: controlling delivery to a cache server of a server; and controlling the at least one cache server to process a forwarded request at a combo node.

Clients may be provided with a caching service by accessing a cache cloud without having to individually connect to each of a plurality of cache servers.

Caching service can be provided without additional configuration.

Using a proxy server ensures consistency even in the event of a failure between the client and the cache server.

By managing the cache cloud through a separate management configuration, there is no need to consider the scalability of the cache cloud in the client, and using the management configuration to monitor the statistical information and resource status of the proxy server or the cache server in real time to generate a failure Prevention and continually improving service quality.

1 is a view showing an overview of a cache system according to an embodiment of the present invention.
2 is a block diagram illustrating an internal configuration of a cache system according to an embodiment of the present invention.
3 is a diagram illustrating a method for guaranteeing coherent hashing in a cache system according to an exemplary embodiment of the present invention.
4 is a view showing an overview of a cache system according to another embodiment of the present invention.
5 is a block diagram illustrating an internal configuration of a cache system according to another embodiment of the present invention.
6 is a flowchart illustrating a caching service providing method according to an exemplary embodiment of the present invention.
7 is a flowchart illustrating a caching service providing method according to another exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The cache system according to embodiments of the present invention is a service for quickly and securely providing a cache function, and may basically be configured in a cache cloud computing form.

1 is a view showing an overview of a cache system according to an embodiment of the present invention. 1 illustrates a plurality of clients 110, a cache cloud area 120, a management area 130, and a manager terminal 140. In this case, the cache system according to the present embodiment may include components included in the cache cloud area 120 and the management area 130. Here, the cache cloud area 120 includes a switch 121, a plurality of proxy nodes 122, and a plurality of cache nodes 123, and the management area 130 includes a management controller 131 and a user interface 132. ) Is included.

First, when a command is transmitted through the switch 121 in one of the plurality of clients 110, the command passes through one proxy node of the plurality of proxy nodes 122, and among the plurality of cache nodes 123. It may be delivered to and processed by at least one cache node. In this case, the result processed by the at least one cache node is transmitted to the corresponding client through one proxy node and the switch 121 of the plurality of proxy nodes 122. That is, the plurality of proxy nodes 122 may perform a relay role for information matching.

The switch 121 distributes load on proxy servers included in the plurality of proxy nodes 122 and is responsible for a health check.

In addition, the management area 130 may serve to help manage the cache system more easily by managing and monitoring the plurality of proxy nodes 122 and the plurality of cache nodes 123. In this case, the management area 130 may include at least a management controller 131 and a management web 132. The management control unit 131 and the user interface unit 132 will be described in more detail with reference to FIG. 2.

2 is a block diagram illustrating an internal configuration of a cache system according to an embodiment of the present invention. First, the client 210 may include the Memcached client 211 as a detailed component. Here, the memcached client 211, for example, may include a client program used for the use of the existing memcached (memcached) server. That is, the client 210 may use the caching service through the cache system according to the present embodiment without adding a separate configuration.

The switch 121 distributes the load to the plurality of proxy servers and performs the health check as described above. For example, if the health check cycle is set to 5 seconds, and no response is made, the proxy server determines that a failure has occurred and does not transmit a client's request or command.

2 illustrates only one proxy node 220 and one cache node 230 of the plurality of proxy nodes. Substantially, the plurality of proxy nodes and the plurality of cache nodes may communicate with each other, and the management node 240 to be described later may also communicate with each other, but in FIG. 2, the proxy node 220 and the cache are provided for convenience of description. Only the node 230 is used to describe the cache system.

Each of the plurality of proxy nodes may communicate with one or more cache nodes of the plurality of cache nodes. In FIG. 2, for convenience of description, the proxy node 220 receives a client request through the switch 121, Assume that it communicates with cache node 230 to forward a received client's request.

The proxy node 220 may support a protocol for an existing cache server (MemCaddy server described above in this embodiment) so that the client can use the general MashCaddy client 211 as it is. In addition, proxy node 220 may provide consistency of cache data through consistent hashing and may handle failure of cache nodes. Consistent hashing and failure handling for cache nodes are discussed in more detail later. In addition, the proxy node 220 may simultaneously perform the role of the control server managing the associated cache nodes. That is, statistics information about the resources of the proxy node 220 may be provided and a real time load balancing function may be provided.

In order to perform such a function, the proxy node 220 may include a proxy server 221, a node controller 222, and an information collector 223 as detailed components.

The proxy server 221 receives a client's request received through the switch 121 and transmits the request to the cache 230 of the corresponding cache node 230.

The node controller 222 performs application initialization, start and end, monitoring, and heart beat (HB) of the proxy server 221. Here, the HB may refer to an operation of periodically checking whether the physical equipment and the application operate normally. That is, the cache system may add and delete cache servers without interruption of the proxy server 221 using the node controller 222. For example, it is possible to flexibly handle processes such as real-time removal of a failed cache server and expansion of a cache server when the performance of the proxy server reaches a threshold value.

In this case, the node controller 222 may start / stop / restart the proxy process by receiving a start / stop / restart command from the management controller 242. In addition, the node controller 222 may receive and process a command for adding a new cache server or deleting an existing cache server to the cache server list included in the proxy server 221 through the management controller 242.

The information collector 223 monitors the resources of the proxy node 220. In this case, the monitored result may be transmitted to the monitoring unit 243 of the management node 240 which will be described later. For example, the information collector 223 may monitor the statistical information such as the number of all requests received from the plurality of clients at the proxy node 220 and the number of requests not received at the cache node 230, and the like. Can be provided as a result.

The cache node 230 may include a plurality of memory servers 231, a node controller 232, and an information collector 233 as detailed components.

Each of the plurality of memory caches 231 may represent a cache server as a storage of cache data. For example, each of the plurality of memory caches 231 may be a memory server.

The node controller 232 performs application initialization, startup and termination, monitoring, and HB of the cache server. In this case, the node controller 222 may start / stop / restart the cache process by receiving a start / stop / restart command from the management controller 242.

The information collector 233 monitors the resources of the cache node 230. In this case, the monitored result may be transmitted to the monitoring unit 243 of the management node 240.

The management node 240 may include a message relay unit 241, a management controller 242, a monitoring unit 243, a web application server (WAS) 244, an RDB 245, and an RRD 246.

The message relay unit 241 may serve as a relay for receiving information transmitted from the node controller 222 of the proxy node 220 and the node controller 232 of the cache node 230 and transmitting the information to the management controller 242. Can be.

The management control unit 242 checks the status of each node through the information received from the node control units 222 and 230 through the message relay unit 241, gives commands to start and end of each node, and The health check of each node is performed based on the statistical information. In addition, the management controller 242 may be in charge of replacing each node as necessary.

For example, the management controller 242 may detect and process a failure of the proxy node 220 or the cache node 230 by using the HBs transmitted from the node controllers 222 and 232. The detection and handling of faults will be described in more detail later.

In addition, the management controller 242 may transmit the QoS (Quality of Service) data transmitted from the node controllers 222 and 232 and the QoS data measured by the management controller 242 to the monitoring unit 243. That is, the node controllers 222 and 232 of the proxy node 220 and the cache node 230 may measure QoS data and periodically transmit the QoS data to the management controller 242, and the management controller 242 may monitor the 243. QoS data can be transmitted over the network. The node controllers 222 and 232 may generate QoS data based on, for example, the execution time of the command measured by sending a "set" command and a "get" command to a registered IP port periodically. For example, the QoS data may include response rate information for each data size.

In addition, the management controller 242 may process start / stop / restart commands of the proxy node 220 or the cache node 230 received from the manager. To this end, the management controller 242 may request start / stop / restart to the node controllers 222 and 232 of the proxy node 220 and the cache node 230.

The monitoring unit 243 may generate statistical information by receiving the monitored results for the resources of the proxy node 220 and the cache node 230 from the information collecting units 223 and 233 as described above. For example, the monitoring unit 243 may receive resource data from the information collecting units 223 and 233 of the proxy node 220 and the cache node 230, and analyzes the resource data to the RRD 246. Can be stored.

In addition, the monitoring unit 243 may analyze the QoS data received from the management control unit 242 and store it in the RRD 246 according to the size of the QoS data.

The WAS 244 is provided to provide a user interface for communicating with an administrator and may correspond to the user interface unit 132 described with reference to FIG. 1. That is, the administrator may access the WAS 244 through the administrator terminal and the web to monitor and manage the proxy server 220 and the cache server 230. For administrators or users, for example, the cache system, proxy node 220, QoS results of cache node 230, system resources such as proxy node 220 and cache node 230, network, disk, and proxy Usage information of the server 221 may be provided.

The relational database (RDB) 245 and the round robin database (RDR) 246 may refer to a database that stores data collected by the management controller 242 and the monitoring unit 243, respectively.

3 is a diagram illustrating a method for guaranteeing coherent hashing in a cache system according to an exemplary embodiment of the present invention. The first dotted line box 310 shows a list of keys included in four nodes and four nodes of the nodes 1 to 4. Here, each node may mean a cache node, and each key may be generated by a specific hash function. At this time, if a failure occurs in the node 4, the keys 'jkl', 'jkm' and 'jkn' are not available and the hashing values are inconsistent. The second dotted line box 320 shows a list of keys included in each of the three nodes and the three nodes of the nodes 1 to 3. That is, the keys 'jkl', 'jkm' and 'jkn' are distributed and stored in three nodes. As such, the proxy node of the cache system can ensure consistent hashing by distributing the keys of the failed cache node to nodes.

As described above, in the form of the existing Memcached client and Memcached server, the failure of the server can be spread to the failure of the client. However, in this embodiment, it is possible to more stably cope with the failure by using a proxy server as an intermediate medium.

For example, a client requests a job to the cache server through a "get" command, and if there is no response after a certain period of time, a cache miss is generated, and data is stored (eg, using a "set" command). If there is no response after a certain period of time, a server error occurs. At this time, the node control unit of the proxy node and the cache node can detect the state of the cache server, remove the failed cache server and control to continue processing the caching service in another cache server.

As another example, the proxy server may check the state of the cache server every second predetermined period during the first predetermined period from the moment of detecting the failure of the cache server. For example, the proxy server can check the status of the cache server every two seconds for 10 minutes. In this case, when the state of the cache server normally returns within 10 minutes, the proxy server may automatically connect the cache server to control the service to the client. This situation can be handled by the node control unit of the cache node, but if the node control unit fails to detect it, the proxy server performs its own health check in the case of temporary disconnection due to a network problem between the proxy node and the cache node. Can handle faults.

4 is a view showing an overview of a cache system according to another embodiment of the present invention. 4 illustrates a plurality of clients 410, a cache cloud area 420, a management area 430, and a manager terminal 140. In this case, the cache system according to the present embodiment may include components included in the cache cloud area 420 and the management area 430.

Here, the cache cloud area 420 may include a switch 421 and a plurality of combo nodes. In FIG. 4, the combo node 1 431 and the combo node N 432 are specifically illustrated among the plurality of combo nodes. In this case, each combo node may include a proxy server, a plurality of cache servers, a node controller, and an information collector. In FIG. 4, a triangular figure may mean a proxy server, and a cylindrical figure may mean a cache server. The circle figure written with "N" may mean a node controller, and the circle figure written with "C" may mean an information collection unit.

In addition, the management area 430 may include a management control unit and a user interface unit. In this case, in FIG. 4, a circle figure written with "AC" may mean a management controller, and a circle figure written with "UI" may mean a user interface unit.

Unlike the cache system described with reference to FIGS. 1 and 2, the cache system according to the present embodiment configures a proxy server and a cache server as one combo node.

In this case, when a command is transmitted through the switch 421 from one client of the plurality of clients 410, the command may be delivered to and processed by one of the plurality of combo nodes. Within a combo node, the proxy server may receive the command and transmit the command to at least one of the plurality of cache servers, and the cache server receiving the command may store or provide data according to the received command. have. The results processed by the at least one cache node are delivered to the client via the proxy server and the switch 421. In this case, the proxy server may be used for a relay role for information integrity.

The switch 421 distributes the load on the proxy server included in each of the plurality of combo nodes, and is in charge of a health check.

In addition, the management area 430 may serve to help manage a cache system more easily by managing and monitoring a plurality of combo nodes.

5 is a block diagram illustrating an internal configuration of a cache system according to another embodiment of the present invention. First, the client 510 may include the Memcached client 511 as a detailed component. Here, the memcached client 511 may include, for example, a client program used for use of an existing memcached server. That is, the client 510 may use the caching service through the cache system according to the present embodiment without adding a separate configuration.

As described above, the switch 421 distributes the load to the proxy server included in each of the plurality of combo nodes and is responsible for the health check. For example, if the health check cycle is set to 5 seconds, and no response is made, the proxy server determines that a failure has occurred and does not transmit a client's request or command.

5 illustrates only the combo node N 432 among the plurality of combo nodes. In FIG. 5, a caching service will be described based on the combo node N 432 for convenience of description.

The combo node N 432 may support a protocol for an existing cache server (MemCaddy server described above in this embodiment) so that the client can use the universal MMC client 511 as it is. In addition, combo node N 432 can provide consistency of cache data through coherent hashing using proxy server 520 and can handle failure of cache nodes. Coherent hashing and failure handling for cache nodes have already been described in detail, and since the same method is used in the present embodiment, repetitive description is omitted. In this case, the proxy server 520 may also simultaneously perform the role of the control server managing the associated cache nodes. In addition, the combo node N 432 may provide statistical information on resources of each of the plurality of memcache dies which are the proxy server 520 and the cache servers, and provide a real-time load balancing function.

In order to perform such a function, the combo node N 432 may include a proxy server 520, a plurality of memory caches 530, a node controller 540, and an information collector 550 as detailed components.

The proxy server 520 receives a client request received through the switch 421 and transmits the request to the corresponding memory 530.

Each of the plurality of memory caches 530 may represent a cache server as a storage of cache data. For example, each of the plurality of memory caches 530 may be a memory server. In this case, the cache server receiving the client's request from the proxy server 520 may store or provide cache data according to a command related to the request.

The node controller 540 may perform application initialization, start and end, monitoring, and HB of the combo node N 432. That is, the cache system may add and delete cache servers without interrupting the proxy server 520 using the node controller 540. For example, it is possible to flexibly handle processes such as real-time removal of a failed cache server and expansion of a cache server when the performance of the proxy server reaches a threshold value.

In this case, the node controller 540 may start / stop / restart the proxy process by receiving a start / stop / restart command from the management node 560. In addition, the node controller 540 may receive and process a command for adding a new cache server or deleting an existing cache server to the cache server list included in the proxy server 520 through the management node 560. The management node 560 described in FIG. 2 is not in communication with the proxy node 220 and the cache node 230 in FIG. 2, but in communication with a plurality of combo nodes as in FIG. 5. Since it may operate in the same manner as 240, repeated description thereof will be omitted.

The information collector 550 monitors the resources of the combo node N 432. In this case, the monitored result may be transmitted to the management node 560 which will be described later. For example, the information collecting unit 550 may provide statistical information such as the number of all requests received from the plurality of clients at the proxy server 520 and the number of requests not received from the plurality of memory caches 530. It can serve as the monitored result.

A description omitted in FIG. 5 may refer to the description before FIG. 5.

6 is a flowchart illustrating a caching service providing method according to an exemplary embodiment of the present invention. The caching service providing method according to the present embodiment may be performed by the cache system described with reference to FIG. 2. In FIG. 6, a caching service providing method will be described by describing a process in which components included in a cache system perform each step.

In step 610, the cache system distributes and forwards the requests received from the plurality of clients in the switch to the plurality of proxy nodes. First, each of the plurality of clients may use a client program used to use an existing cache server, such as Memcached client. The client may be provided with a caching service through the cache system according to the present embodiment without adding a separate configuration. The switch balances the load across multiple proxy servers and is responsible for health checks. For example, if the health check cycle is set to 5 seconds, and no response is made, the proxy server determines that a failure has occurred and does not transmit a client's request or command.

In step 620, the proxy node forwards the request received from the switch to at least one cache node of the plurality of cache nodes. Each of the plurality of proxy nodes may be in communication with one or more cache nodes of the plurality of cache nodes. That is, the proxy node may support a protocol for an existing cache server so that the client can use the general Maddy cache client as it is.

Here, the proxy node may provide consistency of cache data through coherent hashing, and may handle failure of cache nodes. In addition, the proxy node may simultaneously perform the role of the control server managing the associated cache nodes. That is, the proxy node may provide statistical information about the resource and provide a real-time load balancing function.

In step 630, the cache node processes the request received from at least one proxy node of the plurality of proxy nodes. In this case, each of the cache nodes may include a plurality of cache servers that are stores of cache data. That is, the cache node may store or provide cache data according to the request received in step 630.

7 is a flowchart illustrating a caching service providing method according to another exemplary embodiment of the present invention. The caching service providing method according to the present embodiment may be performed by the cache system described with reference to FIG. 5. In FIG. 7, a caching service providing method will be described by describing a process of performing components by the components included in the cache system.

In step 710, the switch distributes and forwards the requests received from the plurality of clients to the plurality of combo nodes. First, each of the plurality of clients may use a client program used to use an existing cache server, such as Memcached client. The client may be provided with a caching service through the cache system according to the present embodiment without adding a separate configuration. The switch balances the load across multiple proxy servers and is responsible for health checks. For example, if the health check cycle is set to 5 seconds, and no response is made, the proxy server determines that a failure has occurred and does not transmit a client's request or command.

In step 720, the combo node controls to transmit a request received from the switch to at least one cache server of a plurality of cache servers connected to the combo node through a proxy server included in the combo node. That is, the combo node may include a proxy server and a plurality of cache servers. In this case, the combo node may provide a real-time load balancing function through a proxy server, and may guarantee coherent hashing of a plurality of cache servers. It may also handle the failure of cache servers.

The combo node may further include a node control unit for performing application initialization, startup and termination, monitoring, and HB of the combo node, and an information collection unit for generating statistical information by monitoring the resources of the combo node, and the cache system may manage the managed node. If further included, it may provide statistical information through communication with the management node or may provide status information of the combo node.

In step 730, the cache system controls at least one cache server in the combo node to process the forwarded request. In other words, the cache server may store or provide cache data according to the delivered request.

6 and 7 may refer to FIGS. 1 to 5.

As such, according to embodiments of the present invention, a client may be provided with a caching service by accessing a cache cloud without having to individually access each of a plurality of cache servers, and does not add a separate configuration at the client. If you do not have a caching service. In addition, consistency may be ensured even when a failure occurs between the client and the cache server by using the proxy server. In addition, by managing the cache cloud through a separate management configuration, there is no need to consider the scalability of the cache cloud in the client, and by using the management configuration to monitor the statistical information and resource status of the proxy server or cache server in real time It can prevent the occurrence of failures and continually improve the quality of service.

The methods according to embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. In addition, the above-described file system can be recorded in a computer-readable recording medium.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

110: multiple clients
120: cache cloud zone
121: switch
122: multiple proxy nodes
123: multiple cache nodes
130: management area

Claims (20)

A switch for distributing and forwarding requests received from the plurality of clients to the plurality of proxy nodes;
The plurality of proxy nodes forwarding a request received from the switch to at least one cache node of the plurality of cache nodes; And
The plurality of cache nodes processing a request received from at least one proxy node of the plurality of proxy nodes
Including,
Each of the plurality of proxy nodes,
A proxy server that selects the at least one cache node based on a cache server list and sends the request to the cache node; And
Node control unit for controlling at least one of application initialization, start and end, monitoring, and heart beat (HB) of the proxy server
Cache system comprising a. The method of claim 1,
Each of the plurality of proxy nodes,
Information collecting unit for generating statistical information by monitoring the resource of the proxy node
The cache system further comprises. The method of claim 1,
The node control unit,
Receiving, start, stop, and restart commands to start, stop, and restart the process of the proxy server. The method of claim 1,
The node control unit,
Adding a cache server to the cache server list or deleting a cache server from the cache server list based on a cache server add / delete command. The method of claim 2,
The information collecting unit,
A cache for generating, as statistical information, information on at least one of the number of all requests sent from the plurality of clients to the corresponding proxy node and the number of requests not received from the cache node that delivered the request among the plurality of cache nodes. system. The method of claim 1,
Each of the plurality of cache nodes,
A plurality of cache servers storing data according to the request or providing data according to the request;
A node controller for controlling at least one of application initialization, start and termination, monitoring, and HB of each of the plurality of cache servers; And
Information collecting unit for generating statistical information by monitoring the resources of the cache node
Including, the cache system. 7. The method according to claim 1 or 6,
The node control unit,
A cache system for measuring the response speed for each data size based on the execution time of the predetermined command. 7. The method according to claim 1 or 6,
The HB includes the operation of periodically checking whether the physical equipment and the application is operating normally. The method of claim 1,
A management node for managing the plurality of proxy nodes and the plurality of cache nodes based on data received from the plurality of proxy nodes and the plurality of cache nodes.
The cache system further comprises. 10. The method of claim 9,
The management node,
A message relay unit for transmitting the information received from the node control unit included in each of the plurality of proxy nodes and the plurality of cache nodes to a management control unit;
Grasping the state of the plurality of proxy nodes and the plurality of cache nodes based on the information received through the message relay unit, and providing start and end commands for each of the plurality of proxy nodes and the plurality of cache nodes. The management control unit;
A monitoring unit generating statistical information by using information received from an information collecting unit included in each of the plurality of proxy nodes and the plurality of cache nodes;
A user interface unit communicating with an administrator terminal connected through a network; And
Database for storing the information generated by the management control unit and the monitoring unit
Including, the cache system. The method of claim 10,
The management control unit,
Transmitting information on the response speed for each data size received through the node controller included in each of the plurality of proxy nodes and the plurality of cache nodes and information on the response speed for each data size measured by the management controller to the monitoring unit. , Cache system. The method of claim 11,
The monitoring unit,
And storing information on a response speed for each data size received from the management controller in the database according to the size of the data. The method of claim 10,
The management control unit,
And a start and end command for each of the plurality of proxy nodes and the plurality of cache nodes based on commands of the manager terminal received through the user interface unit. A proxy server that receives a client's request from a switch and sends the request to at least one cache node selected based on a cache server list among a plurality of cache nodes;
A node controller for controlling at least one of application initialization, start and termination, monitoring, and HB of the proxy server; And
Information collector to monitor system resources and generate statistical information
Proxy system comprising a. 15. The method of claim 14,
The node control unit,
Add a cache server to the cache server list or delete a cache server from the cache server list based on a cache server add / delete command. A switch that distributes and forwards the requests received from the plurality of clients to the plurality of combo nodes; And
The plurality of combo nodes each including a proxy server and a plurality of cache servers, and forwarding a request received from the switch to at least one of the plurality of cache servers through the proxy server;
Cache system comprising a. 17. The method of claim 16,
Each of the plurality of combo nodes,
A node controller for controlling at least one of application initialization, start and end, monitoring, and HB of the combo node; And
Information collecting unit that generates statistical information by monitoring the resources of the combo node
The cache system further comprises. Distributing and forwarding a request received from the plurality of clients to the plurality of proxy nodes in the switch;
Forwarding, at a proxy node, a request received from the switch to at least one cache node of a plurality of cache nodes; And
Processing a request received from at least one proxy node of the plurality of proxy nodes at a cache node
Including,
Delivering to the cache node,
Selecting the at least one cache node based on a cache server list in the proxy server included in the proxy node, and transmitting the request to the cache node; And
Controlling at least one of application initialization, startup and termination, monitoring, and heart beat (HB) of the proxy server by a node controller included in the proxy node;
Caching service providing method comprising a. Distributing and forwarding a request received from the plurality of clients to the plurality of combo nodes in the switch;
Controlling the combo node to forward a request received from the switch to at least one cache server of a plurality of cache servers connected to the combo node through a proxy server included in the combo node; And
Controlling the at least one cache server to process the forwarded request at the combo node
Caching service providing method comprising a. A computer-readable recording medium having recorded thereon a program for performing the method of claim 18.

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