CN104243508A - Server, client side and file synchronization method - Google Patents
Server, client side and file synchronization method Download PDFInfo
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- CN104243508A CN104243508A CN201310225820.6A CN201310225820A CN104243508A CN 104243508 A CN104243508 A CN 104243508A CN 201310225820 A CN201310225820 A CN 201310225820A CN 104243508 A CN104243508 A CN 104243508A
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Abstract
A file synchronization method comprises the following steps: a server calculates first verification information of the synchronized file and sets up a verification information data base; the server receives a synchronization request sent by a client side and sends the first verification information and a modified time of the synchronized file to the client side; if the client side determines that the modified time of the synchronization file and the modified time of the synchronized file are different, and the synchronization file is bigger than a preset value, then second verification information of the synchronization file is calculated; the client side calculates a difference file according to the first and second verification information; the client side sends the difference files and the second verification information to the server; the server receives the difference files and the second verification information, updates the synchronized file according to the difference file and replaces the first verification information in the verification information database with the second verification information. The invention also provides the server and the client side; the synchronization method can realize fast file synchronization between the server and the client side.
Description
Technical field
The present invention relates to file synchronization, particularly relate to the file synchronisation method between a kind of server and client.
Background technology
RSYNC is the efficient File Synchronization tool of one under class unix environment, and it, by optimized synchronization data flow, decreases data traffic, improve file transmission efficiency simultaneously.But there are some problems in traditional RSYNC.In the algorithm of traditional RSNYC, as shown in Figure 1, when having a file request, server end all needs first to calculate local by the weak check value of synchronous documents and strong check value at every turn, is sent to client after having calculated.At this moment client also will calculate the weak check value of local synchronous documents and strong check value, compares after calculating differential file and is sent to server end.Server end after receiving differential file, in conjunction with the differential file received file access pattern out.
Visible in traditional algorithm, main expense is all used in the calculating of weak check value and strong check value.When request that is a lot of when file or client is a lot, server end needs to process huge amount of calculation, and server end will form the bottleneck of check value calculating, and the synchronizing speed of whole system will sharply decline.If the file on server and client side natively synchronously, still can carry out calculating in original algorithm, transmit, compare all operations such as recovery, add much meaningless computing time, greatly reduce file synchronization efficiency.
Summary of the invention
In view of above content, be necessary to provide a kind of server and a kind of client, file synchronization can be carried out efficiently.
Separately, there is a need to provide a kind of file synchronisation method, file synchronization can be carried out efficiently.
A kind of server provided in embodiment of the present invention, be connected with client, described server stores is by synchronous documents, described client stores synchronous documents, described server comprises: module is set up in check information storehouse, described by the first check information of synchronous documents for calculating, and set up check information storehouse, described check information storehouse comprises described first check information; Server end transceiver module, for sending described first check information to described client after receiving the synchronous documents request that described client sends, and receive the second check information of described synchronous documents and described synchronous documents and described by the differential file between synchronous documents from described client; Server file correction verification module, is describedly replaced with described second check information by synchronous documents by described first check information in described check information storehouse for upgrade according to the described differential file received.
Preferably, described check information storehouse is set up module and the information of verification information bank is stored with the form of Hash single linked list, described Hash single linked list store one described by the information of synchronous documents.
Preferably, described first check information is described by the weak check value of synchronous documents and strong check value, and described second check information is the weak check value of described synchronous documents and strong check value.
Preferably, described check information storehouse also comprises described by the modification time of synchronous documents, and described server end transceiver module is also for being sent to described client by the described modification time by synchronous documents.
A kind of client provided in embodiment of the present invention; be connected with server; described client stores synchronous documents, the modification time of described synchronous documents and the preset value of a file size; described server stores is by synchronous documents and described by the modification time of synchronous documents; described client comprises: client transceiver module; for sending synchronization request from described client to described server, also for receiving the described by the first check information of synchronous documents and modification time of described server transmission; Client judge module, whether identical with the described modification time by synchronous documents for judging the modification time of described synchronous documents, also for judging whether the size of described synchronous documents is greater than described preset value; Client file correction verification module, for when the modification time of described synchronous documents is different from the described modification time by synchronous documents and size that is described synchronous documents is greater than described preset value, calculates the second check information of the described synchronous documents in described client and calculate described synchronous documents and described by the differential file between synchronous documents in conjunction with described first check information.
Preferably, described client transceiver module is also for sending described differential file and described second check information extremely described server.
Preferably, described first check information is described by the weak check value of synchronous documents and strong check value, and described second check information is the weak check value of described synchronous documents and strong check value.
Preferably, described client also comprises: when the modification time of described synchronous documents is identical with the described modification time by synchronous documents, described client no longer carries out file synchronization; When the modification time of described synchronous documents is different from the described modification time by synchronous documents and size that is described synchronous documents is less than described preset value, then synchronous documents is directly sent to described server by client sending module.
A kind of file synchronisation method that embodiment of the present invention provides, be applied to synchronous documents between server and client side, described server stores is by synchronous documents, described client stores synchronous documents, the modification time of described synchronous documents and the preset value of a file size, described file synchronisation method comprises: described server calculates describedly is set up check information storehouse by the first check information of synchronous documents, and the information in described check information storehouse comprises described first check information and described by the modification time of synchronous documents; Described client sends synchronization request; Described server send after receiving described synchronization request described first check information and described by the modification time of synchronous documents to described client; If described client judges that the modification time of described synchronous documents is different from the described modification time by synchronous documents and size that is described synchronous documents is greater than described preset value, then calculate the second check information of described synchronous documents; Described client calculates described synchronous documents and described by the differential file between synchronous documents according to described second check information and described first check information; Described differential file and described second check information are sent to described server by described client again; After described server receives described differential file and described second check information, to upgrade according to described differential file and describedly by synchronous documents, described first check information in described check information storehouse is replaced with described second check information.
Preferably, the information in described check information storehouse stores with the form of Hash single linked list, described Hash single linked list store one described by the information of synchronous documents.
Preferably, described first check information is described by the weak check value of synchronous documents and strong check value, and described second check information is the weak check value of described synchronous documents and strong check value.
Preferably, described file synchronisation method also comprises: when described client judge described identical with the modification time of described synchronous documents by the modification time of synchronous documents time, then do not carry out file synchronization; When described client judge described by the modification time of synchronous documents different from the modification time of described synchronous documents and the size of described synchronous documents is less than described preset value time, then directly transmit described synchronous documents to described server, then by described in described server update by synchronous documents.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of traditional file synchronisation method.
Fig. 2 is an implementation environment figure of file synchronisation method of the present invention.
Fig. 3 is the functional block diagram of server and client side of the present invention.
Fig. 4 is the execution mode schematic diagram that the information verifying information bank in server of the present invention stores.
Fig. 5 is a schematic diagram of file synchronisation method of the present invention.
Fig. 6 is the flow chart of file synchronisation method one execution mode of the present invention.
Main element symbol description
Server 100
Module 102 is set up in check information storehouse
Check information storehouse 103
Server end transceiver module 104
Server file correction verification module 106
Client 200
Client transceiver module 202
Client judge module 204
Client file correction verification module 206
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Fig. 2 is an implementation environment figure of file synchronisation method of the present invention.Wherein, client 200 is connected with server 100 by network, and wherein, client 200 is the SmartClient equipment such as panel computer, desktop computer, notebook computer and smart mobile phone.In client 200, store synchronous documents, in server 100, store by synchronous documents, wherein synchronous documents and had identical filename by synchronous documents.After the synchronous documents in client 200 is modified, to require in server 100 corresponding also to be made corresponding amendment by synchronous documents, then whole process need file synchronization.
Fig. 3 is the functional block diagram of server and client side of the present invention.In the present embodiment, server 100 comprises check information storehouse and sets up module 102, check information storehouse 103, server end transceiver module 104 and server end file verification module 106, and client 200 comprises client transceiver module 202, client judge module 204 and client file correction verification module 206.
Before file synchronization, check information storehouse is set up module 102 and is obtained by the check information of synchronous documents, and set up check information storehouse 103 according to obtained check information, wherein, check information storehouse 103 comprises by the first check information of synchronous documents and modification time, and is by the weak check value of synchronous documents and strong check value by the first check information of synchronous documents.In the present embodiment, check information storehouse set up module 102 according to synchronous recording before or calculate by the weak check value of synchronous documents and strong check value obtain that server 100 stores by the first check information of synchronous documents.
In the present embodiment, the data in check information database are stored with the form of Hash single linked list, and as shown in Figure 4, Hash single linked list comprises head pointer and multiple node, and Hash single linked list is uniquely determined by head pointer name.In the present embodiment, comprised multiple data block by synchronous documents, each data block has corresponding weak check value and strong check value.Simultaneously, the head pointer of Hash single linked list is called by the filename of synchronous documents, and the data field of each node stores the weak check value of each data block and the modification time of strong check value and each data block, the pointer field of each node then stores the address of next data block storage.In addition, each by the information of synchronous documents for what store with Hash table, once have data block to increase and decrease or amendment, corresponding node then can be seated in the start node of Hash table, therefore, namely each is the modification time that corresponding Hash table start node stores the update time of synchronous documents.
Continue to go to Fig. 3, wherein client transceiver module 202 is for sending synchronization request from described client to described server 100.
The described synchronization request that server end transceiver module 104 sends for receiving client transceiver module 202, by verification information bank 103 in the first check information and be sent to client 200 by the modification time of synchronous documents and received by client transceiver module 202.In the present embodiment, client transceiver module 202 is sent to by synchronous documents ground the first check information and modification time with the form of data packet.
Client judge module 204 client transceiver module 202 receive the first check information and by synchronous documents ground modification time after, start to judge that the modification time of the synchronous documents stored in client 200 and server 100 store whether identical by the modification time of synchronous documents, if the modification time both judging is identical, then illustrate that synchronous documents does not make any amendment relative to by synchronous documents, therefore do not need to carry out synchronously, if the modification time both judging is not identical, then illustrate that synchronous documents is relative to having been made certain amendment by synchronous documents, then client judge module 204 continues to judge whether the size of synchronous documents is greater than a preset value, if judge, the size of synchronous documents is less than a preset value, then directly synchronous documents is sent to server 100 by client transceiver module 202, if but judge that the size of synchronous documents is greater than a preset value, then carry out process below.In the present embodiment, described preset value is 5,000,000, if the result that client judge module 204 judges is less than 5,000,000, now directly transmit synchronous documents to server 100 required time will be less than and carry out synchronous institute spended time with RSYNC algorithm, therefore when synchronous documents is very little, synchronous documents can be directly sent to server 100 and not need to carry out a series of calculating again by client transceiver module 202.For the preset value in present embodiment, in other embodiments, also other numerical value can be set to as required.
Client file correction verification module 206 is for calculating the second check information of the synchronous documents in client 200 and calculating the differential file of synchronous documents in conjunction with the first check information.Wherein, second check information is the weak check value of synchronous documents and strong check value, the first check information that client 200 can send according to the server end transceiver module 104 of the second check information and reception in addition comparison can calculate amended synchronous documents with by a differential file of synchronous documents, this differential file is a key element in synchronizing process.In the present embodiment, differential file is made up of an instruction file table and a variance data file, and the two is then generate according to the generating algorithm of RSYNC differential file.
After client file correction verification module 206 generates differential file and the second check information, the differential file of generation and the second check information are sent to server 100 and are received by server end transceiver module 104 by client transceiver module 202.
After server end transceiver module 104 receives differential file and the second check information, server file correction verification module 106 will upgrade by synchronous documents according to differential file and the first check information in verification information bank 103 is replaced with the second check information.In the present embodiment, after server end transceiver module 104 receives the differential file that client 200 sends, server file correction verification module 106 is in conjunction with differential file and corresponding being generated a new file and stored by synchronous documents, wherein, new file is replaced corresponding to synchronous documents, and have and correspondence by the identical filename of synchronous documents.
File syn chronizing system in execution mode, according to the coordinated operation of modules, can realize efficient file synchronization.
Fig. 5 is a schematic diagram of file synchronisation method of the present invention, as shown in Figure 5, by setting up what a checking information storehouse in advance at server 100 end, store each by the check information of synchronous documents, when receiving the synchronization request of client 200, check information by respective file sends to client 200, so client 200 is only needed to calculate the check information of synchronous documents, do not need to go to calculate by the check information of synchronous documents at server 100 end more simultaneously, so, not only increase the speed of file synchronization, also mitigate the computation burden of server 100.
Fig. 6 is the flow chart of file synchronisation method one execution mode of the present invention.Described file synchronisation method can be applicable in the server 100 shown in Fig. 3 and client 200, and is performed by the coordination of functional module wherein to realize its function.
In step S602, check information storehouse is set up module 102 and is set up check information storehouse 103 at server 100 end, and wherein, check information storehouse 103 comprises by the first check information of synchronous documents and modification time.Wherein, first check information is by the weak check value of synchronous documents and strong check value, in the present embodiment, in check information storehouse 103, the first check information has two sources, namely can according under synchronous recording before by the first check information of synchronous documents, or go out by the first check information of synchronous documents, namely by the weak check value of synchronous documents and strong check value in the direct calculated in advance of server 100 end.
In step s 604, server end transceiver module 104 receives the synchronization request that in client 200, client transceiver module 202 sends, in the present embodiment, and the filename of synchronous documents and identical by the filename of synchronous documents in server 100.
In step S606, server end transceiver module 104 is by by the first check information of synchronous documents and sent to client 200 by the modification time of synchronous documents, and received by client transceiver module 202, in the present embodiment, the first check information and sent to client 200 with a kind of form of data packet by the modification time of synchronous documents.
In step S608, client judge module 204 judges that whether the modification time of synchronous documents is in consistent by the modification time of synchronous documents, if consistent, illustrate synchronous documents relatively by synchronous documents without any change, therefore do not carry out synchronous, then return step S604, continue the synchronization request being waited for client 200 by server end transceiver module 104, if but the modification time of both judgements is inconsistent, then
In step S610, client judge module 204 judges whether the size of synchronous documents is greater than a preset value, if judge, the size of synchronous documents is less than a preset value, then in step S620, synchronous documents is directly sent to server 100 by client transceiver module 202, then upgrades by synchronous documents in step S618.If judge, the size of synchronous documents is greater than a preset value, then
In step S612 and step S614, client file correction verification module 206 calculate the synchronous documents in client 200 the second check information and in conjunction with client transceiver module 202 receive the first check information calculated difference file.In the present embodiment, second check information of synchronous documents comprises the weak check value of synchronous documents and strong check value, simultaneously, differential file in present embodiment comprises a dial gauge file and a variance data file, wherein, dial gauge file and variance data file generate according to RSYNC differential file generating algorithm.
In step S616, the differential file of generation and the second check information are sent to server 100 end by client transceiver module 202.
In step S618, server file correction verification module 106 generates a new file according to the differential file that server end transceiver module 104 receives, and by old replaced to the new file that generates by synchronous documents, simultaneously, also the first check information in verification information bank 103 is replaced to the second check information, in the present embodiment, new file is identical with amended synchronous documents, and and is had identical filename by synchronous documents.
According to the present invention, in the process of file synchronization, by establishing in advance by the information bank of synchronous documents, decreasing the amount of calculation of server 100 end, having saved computing time, improve file synchronization efficiency.
Claims (12)
1. a server, is connected with client, and described server stores is by synchronous documents, and described client stores synchronous documents, and it is characterized in that, described server comprises:
Module is set up in check information storehouse, described by the first check information of synchronous documents for calculating, and sets up check information storehouse, and described check information storehouse comprises described first check information;
Server end transceiver module, for sending described first check information to described client after receiving the synchronous documents request that described client sends, and receive the second check information of described synchronous documents and described synchronous documents and described by the differential file between synchronous documents from described client; And
Server file correction verification module, is describedly replaced with described second check information by synchronous documents by described first check information in described check information storehouse for upgrade according to the described differential file received.
2. server as claimed in claim 1, is characterized in that, described check information storehouse is set up module and the information in described check information storehouse stored with the form of Hash single linked list, described Hash single linked list store one described by the information of synchronous documents.
3. server as claimed in claim 1, it is characterized in that, described first check information is described by the weak check value of synchronous documents and strong check value, and described second check information is the weak check value of described synchronous documents and strong check value.
4. server as claimed in claim 1, it is characterized in that, described check information storehouse also comprises described by the modification time of synchronous documents, and described server end transceiver module is also for being sent to described client by the described modification time by synchronous documents.
5. a client, be connected with server, described client stores synchronous documents, the modification time of described synchronous documents and the preset value of a file size, and described server stores is by synchronous documents and described by the modification time of synchronous documents, it is characterized in that, described client comprises:
Client transceiver module, for sending synchronous documents request to described server, also for receiving the described by the first check information of synchronous documents and modification time of described server transmission;
Client judge module, whether identical with the described modification time by synchronous documents for judging the modification time of described synchronous documents, also for judging whether the size of described synchronous documents is greater than described preset value;
Client file correction verification module, for when the modification time of described synchronous documents is different from the described modification time by synchronous documents and size that is described synchronous documents is greater than described preset value, calculates the second check information of the described synchronous documents in described client and calculate described synchronous documents and described by the differential file between synchronous documents in conjunction with described first check information.
6. client as claimed in claim 5, is characterized in that, described client transceiver module is also for sending described differential file and described second check information extremely described server.
7. client as claimed in claim 5, it is characterized in that, described first check information is described by the weak check value of synchronous documents and strong check value, and described second check information is the weak check value of described synchronous documents and strong check value.
8. client as claimed in claim 5, is characterized in that, also comprise:
When the modification time of described synchronous documents is identical with the described modification time by synchronous documents, described client no longer carries out file synchronization;
When the modification time of described synchronous documents is different from the described modification time by synchronous documents and size that is described synchronous documents is less than described preset value, described synchronous documents is directly sent to described server by described client sending module.
9. a file synchronisation method, be applied to synchronous documents between server and client side, described server stores is by synchronous documents, described client stores synchronous documents, the modification time of described synchronous documents and the preset value of a file size, it is characterized in that, described file synchronisation method comprises:
Described server calculates describedly is set up check information storehouse by the first check information of synchronous documents, and the information in described check information storehouse comprises described first check information and described by the modification time of synchronous documents;
Described client sends synchronization request;
Described server send after receiving described synchronization request described first check information and described by the modification time of synchronous documents to described client;
If described client judges that the modification time of described synchronous documents is different from the described modification time by synchronous documents and size that is described synchronous documents is greater than described preset value, then calculate the second check information of described synchronous documents;
Described client calculates described synchronous documents and described by the differential file between synchronous documents according to described second check information and described first check information;
Described differential file and described second check information are sent to described server by described client again; And
After described server receives described differential file and described second check information, to upgrade according to described differential file and describedly by synchronous documents, described first check information in described check information storehouse is replaced with described second check information.
10. file synchronisation method as claimed in claim 9, is characterized in that, the information in described check information storehouse stores with the form of Hash single linked list, described Hash single linked list store one described by the information of synchronous documents.
11. file synchronisation methods as claimed in claim 9, is characterized in that, described first check information is described by the weak check value of synchronous documents and strong check value, and described second check information is the weak check value of described synchronous documents and strong check value.
12. file synchronisation methods as claimed in claim 9, is characterized in that, also comprise:
When described client judge described identical with the modification time of described synchronous documents by the modification time of synchronous documents time, then do not carry out file synchronization;
When described client judge described by the modification time of synchronous documents different from the modification time of described synchronous documents and the size of described synchronous documents is less than described preset value time, then directly transmit described synchronous documents to described server, then by described in described server update by synchronous documents.
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| CN201310225820.6A CN104243508A (en) | 2013-06-07 | 2013-06-07 | Server, client side and file synchronization method |
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| CN201310225820.6A CN104243508A (en) | 2013-06-07 | 2013-06-07 | Server, client side and file synchronization method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105282243A (en) * | 2015-09-28 | 2016-01-27 | 深圳市金立通信设备有限公司 | File synchronization method and terminal |
| CN107480267A (en) * | 2017-08-17 | 2017-12-15 | 无锡清华信息科学与技术国家实验室物联网技术中心 | A kind of method that file difference synchronizing speed is improved using locality |
| CN108337303A (en) * | 2018-01-24 | 2018-07-27 | 中国银联股份有限公司 | A kind of method of data synchronization and distributed system |
| CN109739810A (en) * | 2018-12-07 | 2019-05-10 | 中山市江波龙电子有限公司 | File synchronisation method, server, client and the device with store function |
| WO2019157881A1 (en) * | 2018-02-13 | 2019-08-22 | 论客科技（广州）有限公司 | Method and device for mail synchronization, and computer-readable storage medium |
| CN110177106A (en) * | 2019-05-31 | 2019-08-27 | 贵州精准健康数据有限公司 | Medical imaging data transmission system |
| CN111291011A (en) * | 2020-02-19 | 2020-06-16 | 北京百度网讯科技有限公司 | File synchronization method and device, electronic equipment and readable storage medium |
| WO2020199724A1 (en) * | 2019-04-04 | 2020-10-08 | 中国银联股份有限公司 | Data processing method, server and device |
| CN111880970A (en) * | 2020-08-04 | 2020-11-03 | 杭州东方通信软件技术有限公司 | Rapid remote file backup method |
| WO2023241582A1 (en) * | 2022-06-14 | 2023-12-21 | 华为技术有限公司 | Data synchronization method and system, and medium, program product and electronic device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105282243A (en) * | 2015-09-28 | 2016-01-27 | 深圳市金立通信设备有限公司 | File synchronization method and terminal |
| CN107480267A (en) * | 2017-08-17 | 2017-12-15 | 无锡清华信息科学与技术国家实验室物联网技术中心 | A kind of method that file difference synchronizing speed is improved using locality |
| CN108337303A (en) * | 2018-01-24 | 2018-07-27 | 中国银联股份有限公司 | A kind of method of data synchronization and distributed system |
| WO2019157881A1 (en) * | 2018-02-13 | 2019-08-22 | 论客科技（广州）有限公司 | Method and device for mail synchronization, and computer-readable storage medium |
| CN109739810A (en) * | 2018-12-07 | 2019-05-10 | 中山市江波龙电子有限公司 | File synchronisation method, server, client and the device with store function |
| WO2020199724A1 (en) * | 2019-04-04 | 2020-10-08 | 中国银联股份有限公司 | Data processing method, server and device |
| CN110177106A (en) * | 2019-05-31 | 2019-08-27 | 贵州精准健康数据有限公司 | Medical imaging data transmission system |
| CN111291011A (en) * | 2020-02-19 | 2020-06-16 | 北京百度网讯科技有限公司 | File synchronization method and device, electronic equipment and readable storage medium |
| CN111291011B (en) * | 2020-02-19 | 2023-10-20 | 北京百度网讯科技有限公司 | File synchronization method and device, electronic equipment and readable storage medium |
| CN111880970A (en) * | 2020-08-04 | 2020-11-03 | 杭州东方通信软件技术有限公司 | Rapid remote file backup method |
| WO2023241582A1 (en) * | 2022-06-14 | 2023-12-21 | 华为技术有限公司 | Data synchronization method and system, and medium, program product and electronic device |
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Application publication date: 20141224 |