CN102055785A - Online upgrade method for distributed system, distributed system and equipment - Google Patents
Online upgrade method for distributed system, distributed system and equipment Download PDFInfo
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Abstract
The invention provides an online upgrade method for a distributed system, the distributed system and devices. The method comprises that: a server divides a software version file into a plurality of software blocks, generates a sub block data table of the software version file, and sends the sub block data table to a client; the client downloads the software blocks from storage addresses corresponding to the software blocks and downloading ports according to the sub block data table, and reports personal downloading progress and downloading ports for downloading of other clients; the server updates the sub block data table according to the downloading progress and the downloading ports reported by all the clients in the distributed system, and sends the updated sub block data table to the client; the client continuously executes the step of downloading the software blocks according to the updated sub block data table; and after the software version file is completely downloaded, the client performs online upgrade by adopting the software version file. Burden of the server and network bandwidth can be lightened.
Description
Technical Field
The present invention relates to the field of distributed technologies, and in particular, to an online upgrade method for a distributed system, and a device.
Background
With the development of computer technology, online upgrade of computer software has become an indispensable part of computer software. The online upgrading of the software is a good way for improving the function, stability and usability of the software and is also a way for continuously meeting the requirements of customers.
In distributed systems, online upgrades of software are also required. Currently, online upgrade of a distributed system can be divided into two phases: a downloading stage and an upgrading stage; in the downloading phase, a distributed terminal (hereinafter referred to as a client) serving as a client downloads a new software version from a server, as shown in fig. 1, fig. 1 is a schematic diagram of a software downloading manner of an existing distributed system, and in fig. 1, each client is connected to the server and downloads software from the server; in the upgrading stage, each client side adopts the downloaded new software version to upgrade.
Because a large number of clients exist in the distributed system, all the clients download software version files from the same server, which causes great pressure on the server and the network bandwidth; therefore, the existing online upgrading method of the distributed system has heavier burden on the server and the network bandwidth.
Disclosure of Invention
The invention provides an online upgrading method of a distributed system, which reduces the burden on a server and network bandwidth.
The invention also provides a distributed system and related equipment, which can reduce the burden of the online upgrade process of the distributed system on the server and the network bandwidth.
The technical scheme of the invention is realized as follows:
an online upgrade method of a distributed system comprises the following steps:
the server divides the software version file into a plurality of software blocks and generates a block data table of the software version file, wherein the block data table comprises a storage address and a download port corresponding to each software block;
the server sends the block data table to a client;
the client downloads the software block from the corresponding storage address and download port of the software block according to the block data table, and reports the download progress of the client and the download port for other clients to download;
the server updates the block data table according to the downloading progress and the downloading port reported by all the clients in the distributed system, and sends the updated block data table to the clients;
the client continuously executes the step of downloading the software block according to the updated block data table;
and after the client finishes downloading the software version file, the client adopts the software version file to carry out online upgrade.
A distributed system comprising a server and a plurality of clients, wherein,
the server is used for dividing the software version file into a plurality of software blocks, generating a block data table of the software version file, wherein the block data table comprises a storage address and a download port corresponding to each software block, and sending the block data table to the client; the system is also used for updating the block data table according to the downloading progress and the downloading port reported by all the clients in the distributed system and sending the updated block data table to the clients;
the client is used for downloading the software block from the corresponding storage address and the corresponding downloading port of the software block according to the block data table sent by the server, and reporting the downloading progress of the client and the downloading port for other clients to download; and the software version file is also used for online upgrading.
A server, comprising: the device comprises a block module, a block data table maintenance module and a download control module; wherein,
the blocking module is used for dividing the software version file into a plurality of software blocks;
the system comprises a block data table maintenance module, a block data table updating module and a block data table updating module, wherein the block data table maintenance module is used for generating a block data table of a software version file, and the block data table comprises a storage address and a download port corresponding to each software block; the system is also used for updating the block data table according to the downloading progress and the downloading port reported by all the clients in the distributed system;
and the download control module is used for sending the block data table to the client and also used for sending the updated block data table to the client.
A client, comprising: the system comprises a downloading module, a communication module and an upgrading module; wherein,
the downloading module is used for downloading the software block from a storage address and a downloading port corresponding to the software block of the software version file according to the block data table sent by the server;
the communication module is used for reporting the downloading progress of the client and downloading ports for other clients to download to a server;
and the upgrading module is used for carrying out online upgrading by adopting the software version file.
In summary, the scheme provided by the present invention divides the software version file into a plurality of software blocks, and the server generates a block data table of the software version file and records the storage address and the download port corresponding to each software block; the client downloads the software version files in blocks under the control of the server, and when the client finishes downloading one software block, the client can provide the downloading of the software block for other clients; the client reports the downloading progress of the client and the downloading ports for other equipment to download, the server updates the block data table in real time and feeds the updated block data table back to the client regularly, and the client downloads the software blocks by using the updated block data table. By the mode, the invention can share the downloading of the software to each client, thereby lightening the burden on the server and the network bandwidth.
Drawings
FIG. 1 is a diagram illustrating a software download method of a conventional distributed system;
FIG. 2 is a schematic diagram of a software download method of the distributed system of the present invention;
FIG. 3 is a flowchart of an online upgrade method for a distributed system according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a server according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a client according to an embodiment of the present invention.
Detailed Description
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a software downloading manner of a distributed system according to the present invention, in fig. 2, a client and a server in the distributed system are connected in pairs, and the server controls software downloading and software upgrading of the client. The server logically divides the software version file into a plurality of software blocks, and the client can download the software blocks from the server and other clients which have finished downloading. In this way, the downloading pressure is transferred from the original server to all the clients in the network, thereby reducing the burden of the server.
The following examples are given for illustrative purposes. Referring to fig. 3, fig. 3 is a flowchart of an online upgrade method of a distributed system according to an embodiment of the present invention. The method specifically comprises the following steps:
step 301: a manager uploads a software version file to a server, the server verifies the software version file, generates a hash check code of the whole file, and refreshes a version relation table in a database for recording relevant information of the software version file; the version relationship includes: the device model and the version number of the server, a hash check code of the whole software version file, a compatible version number and the like.
Step 302: the server analyzes the software version file, logically divides the software version file into a plurality of software blocks according to a certain size (generally, the size of the software version file is n-th power of 2, and the size of the software version file can be adjusted according to the size of the software version file), forms a plurality of software blocks (the 'division' does not mean that the software version file is physically divided into a plurality of independent software blocks, but means that the software version file is logically divided into a plurality of software blocks to form a plurality of software blocks), and generates a block data table of the software version file, wherein the block data table can contain a storage address and a download port corresponding to each software block of the software version file; the hash check code of each software block can be further included for checking the software blocks after the downloading of the client is finished.
Table 1 below shows a table of block data generated by an embodiment of the present invention.
| ID of software block | Save address and download port | hash check code |
| 1 | l2.1.1.1：1678； | 777723983eff3ggg393k |
| 2 | l2.1.1.1：1678； | 3638339abdcdedda333 |
| 3 | l2.1.1.1：1678； | ababccd293939bc344a |
| …… | …… | …… |
TABLE 1 partitioned data Table
In table 1, the following is used between the address and the download port: "separate, start with letter" l "before saving address, and character after downloading address"; "end".
The individual software blocks are stored in the server before the download is provided. In this embodiment, the IP address of the server is 2.1.1.1, and the download port for providing download is 1678, so in table 1, the storage address of each software block is 2.1.1.1, and the download port is 1678.
In the process of downloading the software block by the client, the client reports the downloading progress of the client and the downloading ports for other clients to the server periodically, and the server updates the table 1 in real time according to the downloading progress of all the clients in the distributed system, which will be described in detail in the following process.
Step 303: the server sends an upgrade command to the client in the distributed system, and the sending of the upgrade command can be directly realized through Socket or can be issued by adopting protocols such as SNMP and the like.
Step 304: and after receiving the upgrading command, the client sends an upgrading request to the server, wherein the upgrading request comprises the model of the client and the current software version information.
Step 305: after receiving an upgrade request of a client, a server judges whether the client needs to be upgraded online according to the model and software version information of the client, and if the client does not need to be upgraded, the server directly replies a message which does not need to be upgraded; if the client side needs to download the software version file, a hash check code of the corresponding software version file is searched (the hash check code is used for checking the whole software version file after the client side finishes downloading, the checking mode is the same as the general mode in the prior art, the method is not limited by the invention) and the data table of the blocks (namely the table 1), and the searched content is transmitted to the client side.
In addition, the server can send the download speed of each software block to the client while sending the block data table to the client; when downloading the software block, the subsequent client can download the software block according to the downloading speed of the software block. In this way, the server controls the downloading speed of the client.
Step 306: and the client randomly selects part of file blocks in the block data table, and downloads the file blocks from the corresponding storage addresses and download ports of the file blocks.
Step 307: in the downloading process, the client requests the updated block data table from the server periodically, and reports the downloading progress of the client and the downloading port for other clients to download at the same time of the request, for example, the downloading port can be reported in the form of table 2.
TABLE 2 download progress and download Port of client
Step 308: after receiving the request of the client, the server firstly feeds back the updated block data table to the client. When the storage addresses of one software block in the block data table exceed 10, the 10 storage addresses and the download ports of the software block can be randomly selected and fed back to the client. The server updates the block data table (table 1) according to the downloading progress and the downloading port (table 2) reported by all the clients in the system; the way of updating the block data table may be: when the downloading progress reported by the client indicates that a software block is downloaded completely, the server adds the address of the client to the storage address corresponding to the software block in the block data table, and adds the downloading address reported by the client to the downloading address corresponding to the software block.
Table 3 is an updated block data table.
TABLE 3 updated chunking data Table
Taking the software block 1 as an example, after a period of downloading, the number of the downloading addresses of the software 1 is increased to 3; this means that in addition to the server, 2 clients have completed downloading software block 1 (client addresses 192.168.1.1 and 10.165.100.1, respectively) and are able to provide downloading of software block 1 to other clients (download ports 5698 and 2345, respectively). When the number of the storage addresses of one software block exceeds 20, the oldest storage address and the oldest download port can be deleted, and new storage addresses and new download ports are written in, so that new download requests can be continuously distributed to new clients, and the burden of each client is relatively balanced. Of course, in order to ensure the success factor of downloading, the corresponding storage address of each software block may be more, and the present invention does not limit this.
Step 309: after receiving the updated block data table, the client searches for the software blocks which are not downloaded in the updated block data table, randomly selects one of the software blocks, sequentially initiates connection requests to the storage addresses of the software blocks according to the updated block data table, and downloads the software blocks from the storage addresses and the download ports which are successfully connected if the connection is successful; if all the saved addresses are not successfully connected, the next software block can be selected for downloading, and so on. The client can also randomly select a plurality of software blocks to be downloaded simultaneously. The client and the server repeatedly execute steps 307 to 309 until the client finishes downloading all the software blocks of the software version file.
It can be seen that, because the software version file is downloaded in blocks, and the client that has downloaded part of the software blocks can provide downloads for other clients, the downloading process does not simply depend on the performance of the server and the bandwidth of the network where the server is located, and can transfer pressure to each client and the network between the clients.
Step 310: while the client downloads the software blocks, the server periodically detects and records the download and upgrade status of all clients in the distributed system, as shown in table 4.
| ID of client | IP address | Download status | Upgrade status | Whether it is available or not |
| pc_01 | 1.1.1.1 | Complete the process | Success of the method | Is that |
| terminal_01 | 2.2.2.2 | Complete the process | Wait for upgrade | Is that |
| Oper_02 | 3.3.3.3 | Unfinished | Is that | |
| Oper_01 | 4.4.4.4 | Unfinished | Whether or not |
TABLE 4
Step 311: the server detects the downloading condition of the client in real time, and when the client which finishes downloading the software version file in the distributed system exceeds a preset proportion (the proportion can be set according to actual needs), an upgrading command can be issued to the client which finishes downloading, so that the online upgrading of the client is controlled. For those clients that need to restart or interrupt the connection with the server during the upgrade process, if the running state of the client does not need to be changed during the upgrade process, the clients can automatically perform the upgrade operation after the download is completed without the control of the server. And after the upgrade is finished, the client reports the upgrade result to the server.
In the above embodiment, the client requests the server for the updated block data table periodically, and the server feeds back the updated block data table to the client according to the request of the client (see steps 307 and 308); the present invention may also provide the updated block data table to the client in other manners, for example, the server periodically and actively sends the updated block data table to the client.
In the above embodiment, while the client requests the updated chunk data table from the server, the client reports its downloading progress and the downloading ports for other clients to download (see step 307). For example:
in step 305, when the server determines that the client needs to perform online upgrade, the server further sends the reporting condition of the client to the client; or, the user using the client sets the reporting condition of the client artificially;
and in the subsequent downloading process, the client reports the downloading progress of the client and the downloading port for other clients to download according to the reporting condition.
The reporting condition may be set according to an actual situation, for example:
the setting mode is as follows:
setting a reporting condition as a fixed period, and reporting by the client according to the fixed period;
the setting mode is two:
setting the reporting condition as the number of software blocks which are downloaded after the last reporting, for example, 5, and reporting by the client when the number of data blocks which are downloaded after the last reporting reaches 5;
the setting mode is three:
and simultaneously setting the 2 reporting conditions, and reporting by the client when any one of the reporting conditions is met, for example:
reporting condition (1): the fixed period is 30 s;
reporting condition (2): the number of the software blocks which are downloaded after the last reporting is 5;
after the client reports for one time, starting a timer, and simultaneously recording the number of the latest downloaded software blocks, if the timer reaches 30s and the number of the latest downloaded software blocks is 3, reporting by the client because the condition (1) is met;
if the timer reaches 20s and the number of the latest downloaded software blocks is 5, the client reports the latest downloaded software blocks as the condition (2) is met.
Obviously, the 2 reporting conditions can be set to be larger, so that when the downloading speed of the client is higher, the client generally meets the condition (2) firstly, the client can report in time, and the update of the block data table by the server is ensured not to be delayed excessively relative to the actual situation in the system; when the downloading speed of the client is relatively low, the above condition (1) is generally met firstly, and the client can report the same information in a relatively large period, so that the number of times of reporting the same information by the client is relatively small, and the bandwidth resource is saved.
In the whole process of the embodiment, the server updates the downloading conditions of all the clients in the distributed system in real time and periodically sends the updated block data table to the clients; the client downloads the software blocks from the devices capable of providing downloads, including servers and other clients, according to the block data table. All the clients are both downloading devices of the software and providing the downloading devices, so that the downloading burden can be dispersed to all the devices in each system, and the burden on the server and the network bandwidth is reduced; and the software version file is downloaded in blocks, so that the downloading speed can be improved.
In addition, in the process, the server controls the software downloading and software upgrading of the client in the distributed system, and can control the downloading speed and the upgrading restarting time.
It should be noted that, in practical applications, the functions of dividing the software blocks, controlling downloading and upgrading may be implemented by one server, or may be implemented by a plurality of servers in the system together.
The invention also proposes a distributed system comprising a server and a plurality of clients, wherein,
the server is used for dividing the software version file into a plurality of software blocks, generating a block data table of the software version file, wherein the block data table comprises a storage address and a download port corresponding to each software block, and sending the block data table to the client; the system is also used for updating the block data table according to the downloading progress and the downloading port reported by all the clients in the distributed system and sending the updated block data table to the clients;
the client is used for downloading the software block from the corresponding storage address and the corresponding downloading port of the software block according to the block data table sent by the server, and reporting the downloading progress of the client and the downloading port for other clients to download; and the software version file is also used for online upgrading.
The invention further provides a server, and referring to fig. 4, fig. 4 is a schematic structural diagram of the server according to the embodiment of the invention. The server includes: a block module 401, a block data table maintenance module 402 and a download control module 403; wherein,
a block dividing module 401, configured to divide the software version file into a plurality of software blocks;
a block data table maintenance module 402, configured to generate a block data table of the software version file, where the block data table includes a storage address and a download port corresponding to each software block; the system is also used for updating the block data table according to the downloading progress and the downloading port reported by all the clients in the distributed system;
and a download control module 403, configured to send the block data table to the client, and further send the updated block data table to the client.
The block data table maintaining module 402 may be configured to, when it is received that the download progress reported by the client indicates that one software block has been downloaded, add the address of the client to the storage address corresponding to the software block in the block data table, and add the download port reported by the client to the download port corresponding to the software block.
The present invention further provides a client, referring to fig. 5, and fig. 5 is a schematic structural diagram of the client according to an embodiment of the present invention. The client comprises: a download module 510, a communication module 520, and an upgrade module 530; wherein,
a downloading module 510, configured to download the software block from a storage address and a downloading port corresponding to the software block of the software version file according to the block data table sent by the server;
a communication module 520 for reporting the download progress of the client to the server and a download port for other clients to download
And the upgrading module 530 is used for performing online upgrading by using the software version file.
The communication module 520 may include: a reporting condition saving submodule 521, a judging submodule 522 and a reporting submodule 523;
the reporting condition saving submodule 521 is configured to save reporting conditions, where the reporting conditions are: the fixed period or the number of the software blocks downloaded by the client is fixed;
the determining submodule 522 is configured to determine whether the client meets the reporting condition, and when the client meets the reporting condition, instruct the reporting submodule 523 to report the client;
the reporting submodule 523 is configured to report the downloading progress of the client and the downloading port for other clients to download to the server according to the instruction of the determining submodule 522.
The download module 510 may be configured to randomly select a software block that has not been downloaded by the client in the block data table, sequentially initiate a connection request to the storage address of the software block, and if the connection is successful, download the software block from the storage address and the download port that are successfully connected; if the connection is unsuccessful, other software blocks are continuously selected for downloading.
In summary, in the solution provided by the present invention, the server divides the software version file into a plurality of software blocks, generates a block data table of the software version file, and records a storage address and a download port corresponding to each software block; the client downloads the software version file in blocks, when the client finishes downloading one software block, the client can provide the downloading of the software block for other clients, and the client reports the downloading progress of the client and a downloading port for other equipment to download to the server according to a preset reporting condition; and the server updates the block data table in real time, feeds the updated block data table back to the client according to the request of the client, and the client downloads the software block by using the updated block data table. By the mode, the invention can share the downloading of the software to each client, thereby lightening the burden on the server and the network bandwidth. In addition, the server can control the software downloading and software upgrading of the client in the distributed system, provide more accurate schedule control and plan control,
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A method for online upgrade of a distributed system, the method comprising:
the server divides the software version file into a plurality of software blocks and generates a block data table of the software version file, wherein the block data table comprises a storage address and a download port corresponding to each software block;
the server sends the block data table to a client;
the client downloads the software block from the corresponding storage address and download port of the software block according to the block data table, and reports the download progress of the client and the download port for other clients to download;
the server updates the block data table according to the downloading progress and the downloading port reported by all the clients in the distributed system, and sends the updated block data table to the clients;
the client continuously executes the step of downloading the software block according to the updated block data table;
and after the client finishes downloading the software version file, the client adopts the software version file to carry out online upgrade.
2. The method of claim 1, wherein the manner of reporting the download progress of the client and the download ports for other clients to download is as follows:
and reporting according to the reporting condition which is sent to the client by the server in advance or the reporting condition which is set by the user in advance.
3. The method of claim 2, wherein the reporting condition is: the fixed period or the number of the software blocks downloaded by the client.
4. The method according to claim 1 or 2, wherein the server updates the block data table according to the download progress and download port reported by all clients in the distributed system as follows:
and when the downloading progress reported by the client indicates that one software block is downloaded, adding the address of the client to a storage address corresponding to the software block in a block data table, and adding a downloading port reported by the client to a downloading port corresponding to the software block by the server.
5. The method according to claim 1 or 2, wherein the client downloads the software block from the corresponding storage address and download port of the software block according to the block data table by:
the client randomly selects the software blocks which are not downloaded in the block data table, sequentially initiates connection requests to the storage addresses of the software blocks, and downloads the software blocks from the storage addresses and the download ports which are successfully connected if the connection is successful; if the connection is unsuccessful, other software blocks are continuously selected for downloading.
6. A distributed system comprising a server and a plurality of clients, wherein,
the server is used for dividing the software version file into a plurality of software blocks, generating a block data table of the software version file, wherein the block data table comprises a storage address and a download port corresponding to each software block, and sending the block data table to the client; the system is also used for updating the block data table according to the downloading progress and the downloading port reported by all the clients in the distributed system and sending the updated block data table to the clients;
the client is used for downloading the software block from the corresponding storage address and the corresponding downloading port of the software block according to the block data table sent by the server, and reporting the downloading progress of the client and the downloading port for other clients to download; and the software version file is also used for online upgrading.
7. A server, characterized in that the server comprises: the device comprises a block module, a block data table maintenance module and a download control module; wherein,
the blocking module is used for dividing the software version file into a plurality of software blocks;
the block data table maintenance module is used for generating a block data table of the software version file, and the block data table comprises a storage address and a download port corresponding to each software block; the system is also used for updating the block data table according to the downloading progress and the downloading port reported by all the clients in the distributed system;
and the download control module is used for sending the block data table to the client and also used for sending the updated block data table to the client.
8. The server according to claim 7, wherein the block data table maintaining module is configured to, when it is received that the downloading progress reported by the client indicates that a software block has been downloaded completely, add the address of the client to the storage address corresponding to the software block in the block data table, and add the download port reported by the client to the download port corresponding to the software block.
9. A client, the client comprising: the system comprises a downloading module, a communication module and an upgrading module; wherein,
the download module is used for downloading the software block from the corresponding storage address and download port of the software block of the software version file according to the block data table sent by the server;
the communication module is used for reporting the downloading progress of the client and downloading ports for other clients to download to a server;
and the upgrading module is used for carrying out online upgrading by adopting the software version file.
10. The client of claim 9, wherein the communication module comprises: a reporting condition saving submodule, a judging submodule and a reporting submodule;
the reporting condition saving submodule is configured to save reporting conditions, where the reporting conditions are: the fixed period or the number of the software blocks downloaded by the client is fixed;
the judging submodule is used for judging whether the client meets the reporting condition or not, and when the client meets the reporting condition, the reporting submodule is instructed to report;
and the reporting submodule is used for reporting the downloading progress of the client and the downloading port for other clients to download to the server according to the indication of the judging submodule.
11. The client according to claim 9 or 10, wherein the downloading module is configured to randomly select a software block that has not been downloaded by the client in the block data table, sequentially initiate a connection request to a storage address of the software block, and if the connection is successful, download the software block from the storage address and the download port that are successfully connected; if the connection is unsuccessful, other software blocks are continuously selected for downloading.
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