CN111585963A - Data acquisition method, system and storage medium - Google Patents
Data acquisition method, system and storage medium Download PDFInfo
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- CN111585963A CN111585963A CN202010269576.3A CN202010269576A CN111585963A CN 111585963 A CN111585963 A CN 111585963A CN 202010269576 A CN202010269576 A CN 202010269576A CN 111585963 A CN111585963 A CN 111585963A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention discloses a data acquisition method, a system and a storage medium, wherein the method comprises the following steps: the network management server sends a data packet requesting to acquire all data objects to the managed equipment; the managed device writes all data entries in the data array of the designated object identifier into a compressed file, and sends the file name of the compressed file to the network management server; after receiving the file name of the compressed file, the network management server calls a TFTP protocol to obtain the compressed file; the network management server decompresses the compressed file, reading all data entries of the specified object identifier stored in the decompressed file. According to the invention, all data in the data array are written into one compressed file by the managed device, and then the network management server is informed to acquire the compressed file and decompress all data by the TFTP protocol, so that a plurality of pieces of data can be transmitted by one data request, and the data acquisition efficiency is greatly improved.
Description
Technical Field
The present invention relates to the field of data processing technologies, and in particular, to a data acquisition method, system, and storage medium.
Background
SNMP (simple network management protocol) is a communication protocol for a network management server to perform remote management maintenance on a network device, and is used to acquire and configure the operating states and parameters of an operating system, a hardware module and service software in the network device, and the protocol uses OID (Object ID, Object identifier, OID is a string of characters in text form, the form of which is similar to an IP address, and is formed by separating a plurality of numerical values with dot numbers, for example, "1.2.3.4.1" represents the name of the device, "1.2.3.4.2" represents the system time of the device), and defines a key value for the data in array form, and the key is used to locate a certain piece of data in the identification data array.
Data such as the system operation time of the network device is non-array data because the data is only one. The parameters of the network port working rate of the network device are data in an array form, because the device has a plurality of network ports, one network port needs to be identified by one key value, the key can be defined to be equal to 1, 2 and 3. Note, however, that the key values are not regular and continuous, and may only be port 1, port 2, port 3, port 5, and not port 4.
On the basis, the SNMP protocol defines three communication data packets to acquire the data of the managed device:
(1) get-request packet, requesting to obtain data of the specified OID. If the specified OID is the array data, the data packet also needs to carry a key value to indicate which piece of the array data the target data is. And the network management server sends the information to the managed device. For example, data specifying OID as the internet access port state, and key equal to 2 is data for acquiring the internet access port 2 state.
(2) And a get-next-request data packet (request search data packet) requesting to acquire the next piece of data of the piece of data corresponding to the key value in the array data of the specified OID, and acquiring the first piece of data in the data array by default if the key value is not carried. And the network management server sends the information to the managed device. For example, data specifying OID as the internet access port state, and key equal to 2 are data for acquiring the internet access port 3 state. Because the network management server does not know the key values corresponding to all the data entries of the array data, all the data entries of the array data can be obtained by traversing only the get-next-request data packet: the key value is not carried when the first piece of data is obtained, the key value of the first piece of data is known after the first piece of data is obtained, the second piece of data is obtained according to the key value of the first piece of data, and all data items are obtained in the same way.
(3) A get-response packet (return data result packet) in response to the get-request packet and the get-next-request packet. And returning the acquired data value or returning an error code when the acquired data fails. The managed device sends the information to the network management server.
The SNMP protocol is encapsulated on the UDP protocol, and the data head of the SNMP protocol and OID and key values carried by the data head also occupy a part of data space; data is transmitted in a clear uncompressed form, limited to the maximum length of a data packet, and only one or a limited number of pieces of data can be transmitted per data request. Each time the managed device requests data, the managed device needs to search the data array for data conforming to the key, and when the data amount in the data array is large, the time taken for searching the data corresponding to the key or the next data corresponding to the key is long.
When all data items of the data array are obtained in a traversing mode, data can be obtained only one by one through a get-next-request data packet until the next data of the last data is obtained unsuccessfully; the time required to get all the data in the array is proportional to the amount of data in the data array. Taking VLAN data of switch equipment as an example, the VLAN data has 4094 pieces at most, and usually thousands of get-next-request packets and get-response communication packets are required to get the data, and the CPU operation capability of the switch is general, and in addition, the switch needs to match and search key values in a data array each time the switch processes a get-next-request, and it takes more than 10 seconds to get all VLAN data. Because of this, when the network management server refreshes and edits the data of the large data array, the time for the managed device to respond is too long, and the efficiency is low.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention mainly aims to provide a data acquisition method, a data acquisition system and a storage medium, and aims to solve the problems that in the prior art, when a network management server refreshes and edits data of a large data array, the time for waiting for the response of a managed device is too long, and the efficiency is low.
In order to achieve the above object, the present invention provides a data acquisition method, including the steps of:
the network management server sends a data packet requesting to acquire all data objects to the managed equipment;
the managed device writes all data entries in the data array of the designated object identifier into a compressed file, and sends the file name of the compressed file to the network management server;
after receiving the file name of the compressed file, the network management server calls a TFTP protocol to obtain the compressed file;
the network management server decompresses the compressed file, reading all data entries of the specified object identifier stored in the decompressed file.
Optionally, the data obtaining method, where the managed device writes all data entries in a data array of a specified object identifier into a compressed file, and sends a file name of the compressed file to a network management server, specifically includes:
the managed device receives the data packet requesting to acquire all the data objects;
the managed device acquires data packets of all data objects according to the request and writes all data entries in the data array of the designated object identifier into a compressed file;
and the managed equipment sends the file name of the compressed file to a network management server by returning a data packet for acquiring results of all the data objects.
Optionally, the data obtaining method, where the network management server sends a data packet requesting to obtain all data objects to the managed device, includes:
predefining the data packet for requesting to acquire all the data objects and the data packet for returning the result of acquiring all the data objects.
Optionally, the data obtaining method includes that the data packet requesting to obtain all data objects is used to request to obtain all data entries in the data array of the managed device specified object identifier.
Optionally, in the data obtaining method, the network management server reads all data entries of the specified object identifier stored in the decompressed file, and is used for remotely managing and maintaining the operating state and parameters of the managed device.
Optionally, in the data obtaining method, the information carried in the data packets requesting to obtain all the data objects includes an object identifier.
Optionally, in the data obtaining method, the information carried in the data packets of all the data objects requested to be obtained does not include a key value.
Optionally, in the data obtaining method, the managed device includes a switch.
In addition, to achieve the above object, the present invention further provides a data acquisition system, wherein the data acquisition system includes: the network management server and the managed device establish communication connection;
the network management server is used for sending a data packet requesting to acquire all data objects to the managed device;
the managed device is used for writing all data entries in the data array of the specified object identifier into a compressed file and sending the file name of the compressed file to the network management server;
the network management server is used for calling a TFTP protocol to obtain the compressed file after receiving the file name of the compressed file;
the network management server is used for decompressing the compressed file and reading all data entries of the specified object identifier stored in the decompressed file.
In addition, to achieve the above object, the present invention further provides a storage medium, wherein the storage medium stores a data acquisition program, and the data acquisition program realizes the steps of the data acquisition method as described above when being executed by a processor.
The invention sends a request to acquire data packets of all data objects to the managed equipment through a network management server; the managed device writes all data entries in the data array of the designated object identifier into a compressed file, and sends the file name of the compressed file to the network management server; after receiving the file name of the compressed file, the network management server calls a TFTP protocol to obtain the compressed file; the network management server decompresses the compressed file, reading all data entries of the specified object identifier stored in the decompressed file. According to the invention, all data in the data array are written into one compressed file by the managed device, and then the network management server is informed to acquire the compressed file and decompress all data by the TFTP protocol, so that a plurality of pieces of data can be transmitted by one data request, and the data acquisition efficiency is greatly improved.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of a data acquisition method of the present invention;
FIG. 2 is a schematic diagram of a preferred embodiment of the data acquisition system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the data acquisition method according to the preferred embodiment of the present invention includes the following steps:
step S10, the network management server sends a packet requesting to acquire all data objects to the managed device.
Specifically, the data has a plurality of values due to a plurality of specific objects, which is called array data (i.e. array data in the present invention), for example, the system time of the computer is non-array data, and the operating system in which the computer is running definitely has only one, that is, only one system time object; the size of a computer disk is data in an array mode, and the computer has a plurality of disk objects, such as a C disk and a D disk.
The network management server is a core component of a computer local area network, a network operating system is operated on the network management server, and the efficiency of the network management server directly influences the efficiency of the whole network. Therefore, a high-end computer or a dedicated server computer is generally used as the network management server. The network management server mainly has the following 4 functions:
(1) the network operating system is operated to control and coordinate the work among the computers in the network, so as to meet the requirements of users to the maximum extent and respond and process.
(2) Shared resources in a storage and management network, such as databases, files, applications, disk space, printers, plotters, and the like.
(3) For the application service of each workstation, a Client/Server (Client/Server) structure is adopted, so that the network Server not only acts as a network Server, but also acts as an application Server.
(4) Monitor and control network activities, actually manage the network, allocate system resources, learn and adjust system operating states, shut down/start up certain resources, and the like.
The invention predefines get-all-request data packets (data packets requesting to acquire all data objects) and get-all-response data packets (data packets returning the results of acquiring all data objects) so as to accelerate the acquisition of large data arrays on the basis of the communication of the two data packets. The data packet requesting to acquire all data objects is used for requesting to acquire all data entries in the data array of the managed device specified object identifier. The data packet requesting to acquire all the data objects and the data packet returning to acquire the results of all the data objects are TFTP data packets.
TFTP (simple File Transfer Protocol) is a Protocol in the TCP/IP Protocol suite for simple File Transfer between a client and a server; TFTP can be used in a UDP environment, such as when a program or file needs to be downloaded to many machines simultaneously, often requiring the use of the TFTP protocol; the TFTP code occupies a small memory, which is important for small computers or for some special-purpose devices that do not require a hard disk, but only a small-capacity rom with TFTP, UDP and IP fixed, and when the power is turned on, the device executes the code in the rom, broadcasts a TFTP request on the network, and the TFTP server on the network sends a response, including an executable binary program, which the device receives and puts into memory, and then starts to run the program, which increases the flexibility.
Specifically, the information carried in the get-all-request packet of all the data objects includes an Object identifier (OID, Object ID), but does not need to carry a key value. Wherein an Object Identifier (OID) is a globally unique value associated with an object to unambiguously identify the object, ensuring that the object is properly located and managed in the communication information processing; in general, OID is the identity card of the object in network communication.
Step S20, the managed device writes all data entries in the data array of the specified object identifier into a compressed file, and sends the file name of the compressed file to the network management server.
Specifically, the managed device receives the data packet requesting to acquire all the data objects; the managed device writes all data entries in the data array of the specified object identifier into a compressed file (the compression principle is to compress the binary code of the file, reduce the adjacent 0, 1 codes, such as 000000, and change it into 60 writes 60 to reduce the space of the file) according to the data packet of all the data objects obtained by the request; and the managed equipment sends the file name of the compressed file to a network management server by returning a data packet for acquiring results of all the data objects.
That is, after receiving the get-all-request packet, the managed device writes all data entries in the data array of the specified OID into a compressed file, and then sends the file name of the compressed file to the network management server by using the get-all-response packet.
Wherein the managed device comprises a switch.
Step S30, after receiving the file name of the compressed file, the network management server calls the TFTP protocol to obtain the compressed file.
Specifically, after receiving the get-all-response packet, the network management server calls a TFTP protocol to obtain the compressed file according to the file name of the compressed file.
Step S40, the network management server decompresses the compressed file, and reads all data entries of the specified object identifier stored in the decompressed file.
Specifically, the network management server decompresses the compressed file and reads all data entries for the specified OID stored in the decompressed file (i.e., the restored file).
Further, the function of the network management server reading the data entry is to remotely manage and maintain the operating state and parameters of the equipment. The SNMP protocol is generally used for managing and maintaining industrial and commercial devices, and for example, the management and maintenance of a common wireless router, a mobile phone computer can control the router by accessing ip 192.168.1.1 of the router by using a browser.
For example, taking the VLAN data of a device that modifies a switch (a network device for forwarding an electrical signal, which can provide an exclusive electrical signal path for any two network nodes accessing the switch) as an example, the VLAN data has a maximum of 4094 (one is equal to one object), each data has about 100 bytes, the data is written into a file and compressed into only 15KB, and taking the commonly used 512 bytes transmitted in each TFTP packet as an example, only 30 TFTP packets are needed to send all the data, and the time taken by a network management server to decompress and read the data in the file is 0.5 seconds in total.
Furthermore, the invention mainly aims at the acquisition operation of the large data array, the data has a plurality of numerical values due to a plurality of specific objects, the data is called array type data, for example, the size of a computer disk is the array type data, the computer has a plurality of disk objects, namely a C disk and a D disk, and when hundreds of specific objects exist, the data can be called the large data array.
The invention writes all data in the big data array into a file through the managed device, compresses the file, and then informs the network management server to acquire the compressed file by using a TFTP protocol and decompress all the data. Because the file is compressed and the data head of the TFTP protocol is much smaller than that of the SNMP protocol, the number of data items sent by one TFTP data packet is much larger than that of data items sent by one SNMP data packet, and the data acquisition efficiency is greatly improved.
Further, as shown in fig. 2, based on the above data acquisition method, the present invention also provides a data acquisition system, wherein the data acquisition system includes: a network management server 100 and a managed device 200, wherein the network management server 100 and the managed device 200 establish communication connection;
the network management server 100 is configured to send a data packet requesting to acquire all data objects to the managed device 200;
the managed device 200 is configured to write all data entries in the data array of the specified object identifier into a compressed file, and send a file name of the compressed file to the network management server 100;
the network management server 100 is configured to call a TFTP protocol to obtain the compressed file after receiving the file name of the compressed file;
the network management server 100 is configured to decompress the compressed file and read all data entries specifying the object identifier stored in the decompressed file.
Specifically, the managed device 200 receives the data packet requesting to acquire all the data objects; the managed device 200 acquires the data packets of all the data objects according to the request, and writes all the data entries in the data array of the designated object identifier into a compressed file; the managed device 200 transmits the file name of the compressed file to the network management server 100 by returning a data packet of the result of acquiring all the data objects.
The data packets requesting to acquire all the data objects and the data packets returning the results of acquiring all the data objects are predefined. The data packet requesting to acquire all data objects is used for requesting to acquire all data entries in the data array of the managed device specified object identifier. The information carried in the data packets of all the data objects, including the object identifier, is acquired by the request. And the information carried in the data packets of all the data objects is requested to be acquired and does not comprise the key value.
Further, the network management server 100 reads all data entries specifying object identifiers stored in the decompressed files for remote management to maintain the operation state and parameters of the managed device 200.
The managed device 200 comprises a switch.
The present invention also provides a storage medium, wherein the storage medium stores a data acquisition program, and the data acquisition program realizes the steps of the data acquisition method as described above when being executed by a processor.
In summary, the present invention provides a data acquisition method, a system and a storage medium, wherein the method includes: the network management server sends a data packet requesting to acquire all data objects to the managed equipment; the managed device writes all data entries in the data array of the designated object identifier into a compressed file, and sends the file name of the compressed file to the network management server; after receiving the file name of the compressed file, the network management server calls a TFTP protocol to obtain the compressed file; the network management server decompresses the compressed file, reading all data entries of the specified object identifier stored in the decompressed file. According to the invention, all data in the data array are written into one compressed file by the managed device, and then the network management server is informed to acquire the compressed file and decompress all data by the TFTP protocol, so that a plurality of pieces of data can be transmitted by one data request, and the data acquisition efficiency is greatly improved.
Of course, it will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program instructing relevant hardware (such as a processor, a controller, etc.), and the program may be stored in a computer readable storage medium, and when executed, the program may include the processes of the above method embodiments. The storage medium may be a memory, a magnetic disk, an optical disk, etc.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A data acquisition method, characterized in that the data acquisition method comprises:
the network management server sends a data packet requesting to acquire all data objects to the managed equipment;
the managed device writes all data entries in the data array of the designated object identifier into a compressed file, and sends the file name of the compressed file to the network management server;
after receiving the file name of the compressed file, the network management server calls a TFTP protocol to obtain the compressed file;
the network management server decompresses the compressed file, reading all data entries of the specified object identifier stored in the decompressed file.
2. The data acquisition method according to claim 1, wherein the managed device writes all data entries in the data array of the specified object identifier into a compressed file, and sends a file name of the compressed file to the network management server, and specifically includes:
the managed device receives the data packet requesting to acquire all the data objects;
the managed device acquires data packets of all data objects according to the request and writes all data entries in the data array of the designated object identifier into a compressed file;
and the managed equipment sends the file name of the compressed file to a network management server by returning a data packet for acquiring results of all the data objects.
3. The data acquisition method according to claim 1, wherein the network management server sends a packet requesting to acquire all data objects to the managed device, and before the step, the method further comprises:
predefining the data packet for requesting to acquire all the data objects and the data packet for returning the result of acquiring all the data objects.
4. The data acquisition method according to claim 1 or 3, wherein the data packet requesting acquisition of all data objects is used to request acquisition of all data entries in the data array of the managed device specified object identifier.
5. The data acquisition method according to claim 1, wherein the network management server reads all data entries of the specified object identifier stored in the decompressed file for remote management and maintenance of the operating status and parameters of the managed device.
6. The data acquisition method according to claim 1, wherein the information carried in the data packets requesting to acquire all data objects includes an object identifier.
7. The data acquisition method according to claim 6, wherein the information carried in the data packets requesting to acquire all data objects does not include a key value.
8. The data acquisition method according to claim 1 or 5, wherein the managed device includes a switch.
9. A data acquisition system, characterized in that the data acquisition system comprises: the network management server and the managed device establish communication connection;
the network management server is used for sending a data packet requesting to acquire all data objects to the managed device;
the managed device is used for writing all data entries in the data array of the specified object identifier into a compressed file and sending the file name of the compressed file to the network management server;
the network management server is used for calling a TFTP protocol to obtain the compressed file after receiving the file name of the compressed file;
the network management server is used for decompressing the compressed file and reading all data entries of the specified object identifier stored in the decompressed file.
10. A storage medium storing a data acquisition program which, when executed by a processor, implements the steps of the data acquisition method according to any one of claims 1 to 8.
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| CN113126920A (en) * | 2021-04-02 | 2021-07-16 | 深圳市杉岩数据技术有限公司 | Object storage batch reading and writing method, client, storage gateway and medium |
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