CN111901420B - Data synchronization method, device and system - Google Patents
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Abstract
The application discloses a data synchronization method, which is applied to a client and comprises the steps of judging whether a first version of the client is smaller than a second version of a server stored by the client; if the first version is smaller than the second version, the second version is sent to the server, so that the server can acquire second data corresponding to the second version in a database; receiving the second data sent by the server; refreshing first data to be the second data, and updating the first version to be the second version, wherein the first data corresponds to the first version. According to the method, when the first version of the client is smaller than the second version, only the second version is sent to the server, the first data is not required to be sent, and the size of the version is far smaller than that of the data, so that the time consumption of the process of sending the second version is short, the data synchronization speed is improved, and meanwhile, the flow consumption is reduced. In addition, the application also provides a device and a system with the advantages.
Description
Technical Field
The present disclosure relates to the field of computer technologies, and in particular, to a data synchronization method, apparatus, and system.
Background
When the data volume is large, network fluctuation can have great influence on the data, so that the data between the clients and the server are inconsistent, such as conference cooperation white boards, and pen loss is easy to occur when writing is poor.
At present, when data synchronization is performed between a client and a server, the client directly sends local data to the server, the data of the client is compared with the data in the server, when the data is larger, the time spent for sending the local data to the server is long, the data synchronization speed is reduced, and more flow is consumed due to the larger data.
Therefore, how to solve the above technical problems should be of great interest to those skilled in the art.
Disclosure of Invention
The purpose of the application is to provide a data synchronization method, a data synchronization device and a data synchronization system, so that the data synchronization speed is improved, and the flow consumption is reduced.
In order to solve the above technical problems, the present application provides a data synchronization method, applied to a client, including:
judging whether the first version of the client is smaller than the second version of the server stored by the client;
if the first version is smaller than the second version, the second version is sent to the server, so that the server can acquire second data corresponding to the second version in a database;
receiving the second data sent by the server;
refreshing first data to be the second data, and updating the first version to be the second version, wherein the first data corresponds to the first version.
Optionally, the method further comprises:
if the first version is larger than the second version, the first data is sent to the server so that the server can compare the sizes of the first version and a target version, wherein the target version is a version of target data corresponding to the first data in a database;
and when the first version is smaller than the target version, receiving the target version sent by the server, and updating the first version into the target version.
Optionally, the method further comprises:
judging whether the second data are received within a preset time;
if the second data is received, executing the steps of refreshing first data into the second data and updating the first version into the second version, wherein the first data corresponds to the first version;
and if the second data is not received, executing the step of sending the second version to the server.
The application also provides a data synchronization device, comprising:
the first judging module is used for judging whether the first version of the client is smaller than the second version of the server stored by the client;
the first sending module is used for sending the second version to the server if the first version is smaller than the second version, so that the server can acquire second data corresponding to the second version in the database;
the first receiving module is used for receiving the second data sent by the server;
and the refreshing and updating module is used for refreshing first data into the second data and updating the first version into the second version, wherein the first data corresponds to the first version.
Optionally, the method further comprises:
the second judging module is used for judging whether the second data are received in a preset time;
the first execution module is used for executing the steps of refreshing first data into the second data and updating the first version into the second version if the second data is received, wherein the first data corresponds to the first version;
and the second execution module is used for executing the step of sending the second version to the server if the second data is not received.
The application also provides a data synchronization method, which is applied to the server and comprises the following steps:
when the first version of the client is smaller than the second version of the server stored by the client, receiving the second version sent by the client;
acquiring second data corresponding to the second version in a database;
and sending the second data to the client so that the client refreshes the first data into the second data and updates the first version into the second version, wherein the first data corresponds to the first version.
Optionally, the method further comprises:
when the first version is larger than the second version, receiving the first data sent by the client;
comparing the sizes of the first version and a target version, wherein the target version is a version of target data corresponding to the first data in a database;
and when the first version is smaller than the target version, sending the target version to the client so that the client updates the first version to the target version.
The application also provides a data synchronization device, comprising:
the second receiving module is used for receiving the second version sent by the client when the first version of the client is smaller than the second version in the server stored by the client;
the acquisition module is used for acquiring second data corresponding to the second version in the database;
and the second sending module is used for sending the second data to the client so that the client refreshes the first data into the second data and updates the first version into the second version, and the first data corresponds to the first version.
Optionally, the method further comprises:
the third receiving module is used for receiving the first data sent by the client when the first version is larger than the second version;
the comparison module is used for comparing the sizes of the first version and a target version, wherein the target version is a version of target data corresponding to the first data in a database;
and the third sending module is used for sending the target version to the client when the first version is smaller than the target version, so that the client updates the first version to the target version.
The application also provides a data synchronization system, comprising:
a client for executing any one of the above data synchronization methods;
and the server is used for executing the steps of any one of the data synchronization methods.
The data synchronization method provided by the application is applied to a client and comprises the following steps: judging whether the first version of the client is smaller than the second version of the server stored by the client; if the first version is smaller than the second version, the second version is sent to the server, so that the server can acquire second data corresponding to the second version in a database; receiving the second data sent by the server; refreshing first data to be the second data, and updating the first version to be the second version, wherein the first data corresponds to the first version.
Therefore, the client side of the data synchronization method compares the local first version with the second version in the locally stored server, and only sends the second version to the server when the first version is smaller than the second version, so that the server obtains second data corresponding to the second version in the database, sends the second data to the client side, and further enables the client side to refresh the first data into the second data, and update the first version into the second version.
In addition, the application also provides a device and a system with the advantages.
Drawings
For a clearer description of embodiments of the present application or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description that follow are only some embodiments of the present application, and that other drawings may be obtained from these drawings by a person of ordinary skill in the art without inventive effort.
Fig. 1 is a flowchart of a data synchronization method according to an embodiment of the present application;
FIG. 2 is a flowchart of another data synchronization method according to an embodiment of the present disclosure;
fig. 3 is a block diagram of a data synchronization device according to an embodiment of the present application;
FIG. 4 is a flowchart of another data synchronization method according to an embodiment of the present disclosure;
FIG. 5 is a flowchart of another method for synchronizing data according to an embodiment of the present disclosure;
fig. 6 is a block diagram of another data synchronization device according to an embodiment of the present application.
Detailed Description
In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
As described in the background art, at present, when data synchronization is performed, the client directly sends local data to the server, compares the data of the client with the data in the server, and when the data is larger, it takes time to send the local data to the server, so as to reduce the data synchronization speed, and because the data is larger, more traffic is consumed.
In view of this, the present application provides a data synchronization method, please refer to fig. 1, fig. 1 is a flowchart of a data synchronization method provided in an embodiment of the present application, and the method is applied to a client, and includes:
step S101: and judging whether the first version of the client is smaller than the second version of the server stored by the client.
The first version is a version of first data stored locally by the client, each data has its corresponding version, and the second version corresponds to second data stored in the server.
Step S102: and if the first version is smaller than the second version, sending the second version to the server so that the server can acquire second data corresponding to the second version in the database.
The first version is smaller than the second version, which indicates that the first data in the client is not the latest data and data synchronization is needed, so that the second version is sent to the server, thereby enabling the server to acquire the latest second data stored in the database and send the second data to the client, and simultaneously, indicating that the server receives the second version sent by the client.
Step S103: and receiving the second data sent by the server.
Step S104: refreshing first data to be the second data, and updating the first version to be the second version, wherein the first data corresponds to the first version.
Further, after the client sends the second version to the server, the method further includes: storing the first data in a local response list; correspondingly, after receiving the second data sent by the server, the method further comprises: the first data in the response list is removed.
The client in the application is a client with a data synchronization thread, constantly compares with the version in the server, has high instantaneity, ensures the consistency of data, avoids the existing synchronization mode of limited retry or active triggering retry, or requests the complete data of the server to the client after reconnecting the network,
the data synchronization method comprises the steps that a client compares a local first version with a second version in a locally stored server, and only sends the second version to the server when the first version is smaller than the second version, so that the server obtains second data corresponding to the second version in a database and sends the second data to the client, the client refreshes the first data into the second data and updates the first version into the second version, the client only needs to send the second version in the process of data synchronization, the first data is not required to be sent, the size of the version is far smaller than that of the data, the time consumption of the process of sending the second version is short, the data synchronization speed is improved, and the flow consumption is reduced.
Referring to fig. 2, in one embodiment of the present application, a data synchronization method includes:
step S201: and judging whether the first version of the client is smaller than the second version of the server stored by the client.
Step S202: and if the first version is smaller than the second version, sending the second version to the server so that the server can acquire second data corresponding to the second version in the database.
Step S203: and receiving the second data sent by the server.
Step S204: refreshing first data to be the second data, and updating the first version to be the second version, wherein the first data corresponds to the first version.
Step S205: and if the first version is larger than the second version, sending the first data to the server so that the server compares the sizes of the first version and a target version, wherein the target version is the version of target data corresponding to the first data in a database.
When the first version is greater than the second version, the first data in the client is newer than the second data in the database of the server, so the client sends the first data to the server, and it should be noted that the first data carries an identification code indicating its category and the first version. However, there may be other clients in the database of the server that send to the target data in the server. After the server receives the first data, the target data corresponding to the identification code of the first data is found in the database according to the identification code of the first data, and then the first version is compared with the target version of the target data.
Step S206: and when the first version is smaller than the target version, receiving the target version sent by the server, and updating the first version into the target version.
When the first version is smaller than the target version, the target data corresponding to the target version is indicated to be newer than the first data, and at the moment, the client receives the target version sent by the server and updates the local first version to be the target version.
Further, when the first version is equal to the target version, the first data is the latest data, and the first data at the client does not need to be synchronized and is not processed; when the first version is larger than the target version, the first data is the latest data, the first data at the client side does not need to be synchronized, and the client side sends the first data to the server at the moment, so that the server obtains the latest data, and the data synchronization of the server is realized.
It is noted that when the first version is equal to the second version, no processing is required.
According to the data synchronization method provided by the embodiment, the first data is sent to the server only when the first version of the client is larger than the second version, so that the data synchronization is performed, when the first version is smaller than the second version, only the second version is needed to be sent to the server, the first data is not needed to be sent, and the size of the version is far smaller than the size of the data, so that the time consumption for sending the second version is short, the data synchronization speed is improved, and the flow consumption is reduced.
Preferably, on the basis of the foregoing embodiment, in one embodiment of the present application, the data synchronization method further includes:
judging whether the second data are received within a preset time;
if the second data is received, executing the steps of refreshing first data into the second data and updating the first version into the second version, wherein the first data corresponds to the first version;
and if the second data is not received, executing the step of sending the second version to the server.
It should be noted that, the preset time is not specifically limited in this application, and may be set by itself. For example, the preset time may be 10 seconds, or 15 seconds, or the like.
Preferably, on the basis of the foregoing embodiment, in one embodiment of the present application, the data synchronization method further includes:
judging whether the target version is received within a preset time;
if the target version is received, a step of updating the first version to the target version is executed;
and if the target version is not received, executing the step of sending the first data to the server.
The following describes a data synchronization device provided in an embodiment of the present application, and the data synchronization device described below and the data synchronization method described above may be referred to correspondingly.
Fig. 3 is a block diagram of a data synchronization device according to an embodiment of the present application, and referring to fig. 3, the data synchronization device may include:
a first judging module 100, configured to judge whether the first version of the client is smaller than the second version of the server stored in the client;
a first sending module 200, configured to send the second version to the server if the first version is smaller than the second version, so that the server obtains second data corresponding to the second version in the database;
a first receiving module 300, configured to receive the second data sent by the server;
and the refreshing and updating module 400 is configured to refresh the first data into the second data and update the first version into the second version, where the first data corresponds to the first version.
The data synchronization device of this embodiment is used to implement the foregoing data synchronization method, so that the specific implementation in the data synchronization device may be found in the foregoing example portions of the data synchronization method, for example, the first determining module 100, the first transmitting module 200, the first receiving module 300, and the refreshing and updating module 400, which are respectively used to implement steps S101, S102, S103, and S104 in the foregoing data synchronization method, so that the specific implementation thereof may refer to the description of the corresponding examples of each portion and will not be repeated herein.
Optionally, the data synchronization device further includes:
the second judging module is used for judging whether the second data are received in a preset time;
the first execution module is used for executing the steps of refreshing first data into the second data and updating the first version into the second version if the second data is received, wherein the first data corresponds to the first version;
and the second execution module is used for executing the step of sending the second version to the server if the second data is not received.
Optionally, the data synchronization device further includes:
a fourth sending module, configured to send the first data to the server if the first version is greater than the second version, so that the server compares the sizes of the first version and a target version, where the target version is a version of target data corresponding to the first data in a database;
and the receiving and updating module is used for receiving the target version sent by the server when the first version is smaller than the target version, and updating the first version into the target version.
The present application also provides a data synchronization method, please refer to fig. 4, fig. 4 is a flowchart of another data synchronization method provided in an embodiment of the present application, where the method is applied to a server, and includes:
step S301: and when the first version of the client is smaller than the second version of the server stored by the client, receiving the second version sent by the client.
The first version being smaller than the second version indicates that second data corresponding to the second version in the server is newer than first data corresponding to the first version in the client, and the first data of the client needs to be data synchronized, and at the moment, the server receives the second version sent by the client.
Step S302: and obtaining second data corresponding to the second version in the database.
Step S303: and sending the second data to the client so that the client refreshes the first data into the second data and updates the first version into the second version, wherein the first data corresponds to the first version.
According to the data synchronization method, when the first version of the client is smaller than the second version of the server stored in the client, the server only receives the second version sent by the client, further obtains second data corresponding to the second version, and sends the second data to the client, so that the client performs data synchronization, the size of the version is far smaller than that of the data, therefore the time consumption of the process of receiving the second version is short, the data synchronization speed is improved, and meanwhile the flow consumption is reduced.
Referring to fig. 5, in one embodiment of the present application, the data synchronization method includes:
step S401: and when the first version of the client is smaller than the second version of the server stored by the client, receiving the second version sent by the client.
Step S402: and obtaining second data corresponding to the second version in the database.
Step S403: and sending the second data to the client so that the client refreshes the first data into the second data and updates the first version into the second version, wherein the first data corresponds to the first version.
Step S404: and when the first version is larger than the second version, receiving the first data sent by the client.
When the first version is greater than the second version, the second data corresponding to the second version in the server is not new to the first data locally sent by the client, so that the server receives the first data sent by the client, wherein the first data carries an identification code representing the category of the first data and the first version.
Step S405: comparing the sizes of the first version and a target version, wherein the target version is the version of target data corresponding to the first data in a database.
The target data are data sent by other clients stored in a database of the server, and after the server receives the first data, the target data corresponding to the identification code of the first data are found in the database according to the identification code of the first data, so that the first version and the target version are compared.
Step S406: and when the first version is smaller than the target version, sending the target version to the client so that the client updates the first version to the target version.
And when the first version is smaller than the target version, indicating that the target data corresponding to the target version is newer than the first data, and sending the target version to the client so that the client updates the local first version to be the target version.
Further, when the first version is equal to the target version, the first data is the latest data, and the first data at the client does not need to be synchronized and is not processed; when the first version is larger than the target version, the first data is the latest data, and the server receives the first data sent by the client, so that the latest data is obtained, and the data synchronization of the server is realized.
It is noted that when the first version is equal to the second version, no processing is required.
The following describes a data synchronization device provided in an embodiment of the present application, and the data synchronization device described below and the data synchronization method described above may be referred to correspondingly.
Fig. 6 is a block diagram of another data synchronization device according to an embodiment of the present application, and referring to fig. 6, the data synchronization device may include:
a second receiving module 500, configured to receive, when a first version of a client is smaller than a second version of the server stored by the client, the second version sent by the client;
an obtaining module 600, configured to obtain second data corresponding to the second version in the database;
and a second sending module 700, configured to send the second data to the client, so that the client refreshes the first data into the second data, and updates the first version into the second version, where the first data corresponds to the first version.
The data synchronization device of this embodiment is used to implement the foregoing data synchronization method, so that the specific implementation of the data synchronization device may be referred to the foregoing example portions of the data synchronization method, for example, the second receiving module 500, the obtaining module 600, and the second sending module 700, which are respectively used to implement steps S301, S302, and S303 in the foregoing data synchronization method, so that the specific implementation thereof may refer to the corresponding respective partial examples and will not be described herein again.
Optionally, the data synchronization device further includes:
the third receiving module is used for receiving the first data sent by the client when the first version is larger than the second version;
the comparison module is used for comparing the sizes of the first version and a target version, wherein the target version is a version of target data corresponding to the first data in a database;
and the third sending module is used for sending the target version to the client when the first version is smaller than the target version, so that the client updates the first version to the target version.
The application also provides a data synchronization system, comprising:
the client is used for executing the steps of the data synchronization method in the embodiment;
and the server is used for executing the steps of the data synchronization method in the embodiment.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The data synchronization method, the device and the system provided by the application are described in detail above. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
Claims (10)
1. A data synchronization method, applied to a client, comprising:
judging whether the first version of the client is smaller than the second version of the server stored by the client; the first version is a version of first data stored locally by the client;
if the first version is smaller than the second version, the second version is sent to the server, so that the server can acquire second data corresponding to the second version in a database;
receiving the second data sent by the server;
refreshing first data to be the second data, and updating the first version to be the second version, wherein the first data corresponds to the first version.
2. The data synchronization method of claim 1, further comprising:
if the first version is larger than the second version, the first data is sent to the server so that the server can compare the sizes of the first version and a target version, wherein the target version is a version of target data corresponding to the first data in a database; the first data carries the first version;
and when the first version is smaller than the target version, receiving the target version sent by the server, and updating the first version into the target version.
3. The data synchronization method of claim 2, further comprising:
judging whether the second data are received within a preset time;
if the second data is received, executing the steps of refreshing first data into the second data and updating the first version into the second version, wherein the first data corresponds to the first version;
and if the second data is not received, executing the step of sending the second version to the server.
4. A data synchronization device, comprising:
the first judging module is used for judging whether the first version of the client is smaller than the second version of the server stored by the client; the first version is a version of first data stored locally by the client;
the first sending module is used for sending the second version to the server if the first version is smaller than the second version, so that the server can acquire second data corresponding to the second version in the database;
the first receiving module is used for receiving the second data sent by the server;
and the refreshing and updating module is used for refreshing first data into the second data and updating the first version into the second version, wherein the first data corresponds to the first version.
5. The data synchronization device of claim 4, further comprising:
the second judging module is used for judging whether the second data are received in a preset time;
the first execution module is used for executing the steps of refreshing first data into the second data and updating the first version into the second version if the second data is received, wherein the first data corresponds to the first version;
and the second execution module is used for executing the step of sending the second version to the server if the second data is not received.
6. A data synchronization method, applied to a server, comprising:
when the first version of the client is smaller than the second version of the server stored by the client, receiving the second version sent by the client; the first version is a version of first data stored locally by the client;
acquiring second data corresponding to the second version in a database;
and sending the second data to the client so that the client refreshes the first data into the second data and updates the first version into the second version, wherein the first data corresponds to the first version.
7. The data synchronization method of claim 6, further comprising:
when the first version is larger than the second version, receiving the first data sent by the client;
comparing the sizes of the first version and a target version, wherein the target version is a version of target data corresponding to the first data in a database;
and when the first version is smaller than the target version, sending the target version to the client so that the client updates the first version to the target version.
8. A data synchronization device, comprising:
the second receiving module is used for receiving the second version sent by the client when the first version of the client is smaller than the second version in the server stored by the client; the first version is a version of first data stored locally by the client;
the acquisition module is used for acquiring second data corresponding to the second version in the database;
and the second sending module is used for sending the second data to the client so that the client refreshes the first data into the second data and updates the first version into the second version, and the first data corresponds to the first version.
9. The data synchronization device of claim 8, further comprising:
the third receiving module is used for receiving the first data sent by the client when the first version is larger than the second version;
the comparison module is used for comparing the sizes of the first version and a target version, wherein the target version is a version of target data corresponding to the first data in a database;
and the third sending module is used for sending the target version to the client when the first version is smaller than the target version, so that the client updates the first version to the target version.
10. A data synchronization system, comprising:
a client for performing the steps of the data synchronization method according to any one of claims 1 to 3;
server for performing the steps of the data synchronization method according to claim 6 or 7.
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| CN102737028A (en) * | 2011-04-01 | 2012-10-17 | 深圳市赛格导航科技股份有限公司 | Synchronization method and synchronization system of database |
| CN103716370B (en) * | 2013-10-13 | 2018-01-02 | 北界创想（北京）软件有限公司 | The method and apparatus that data syn-chronization is carried out between multiple client |
| CN103678494B (en) * | 2013-11-15 | 2018-09-11 | 北京奇虎科技有限公司 | Client synchronization services the method and device of end data |
| CN104580425A (en) * | 2014-12-26 | 2015-04-29 | 北京中交兴路车联网科技有限公司 | Client data synchronization method and system |
| CN107577678B (en) * | 2016-06-30 | 2021-02-09 | 华为技术有限公司 | Method, client and server for processing database transaction |
| US10789262B2 (en) * | 2017-05-16 | 2020-09-29 | Sap Se | Progressive chart rendering |
| CN109218418A (en) * | 2018-09-04 | 2019-01-15 | 北京粉笔未来科技有限公司 | Method of data synchronization and device calculate equipment and storage medium |
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| CN103002011A (en) * | 2012-10-29 | 2013-03-27 | 北京奇虎科技有限公司 | Server-based data updating method and server |
| WO2018045758A1 (en) * | 2016-09-08 | 2018-03-15 | 华为技术有限公司 | Data storage method and data centre |
| CN106850745A (en) * | 2016-12-23 | 2017-06-13 | 北京五八信息技术有限公司 | A kind of real-time synchronization method and device |
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