CN103744906A - System, method and device for data synchronization - Google Patents
System, method and device for data synchronization Download PDFInfo
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Abstract
An embodiment of the invention provides a system, method and device for data synchronization and relates to the technical field of database systems. A data synchronization framework between an original master server and an original slave server is modified, and a parallel synchronization framework is adopted to solve the problem that data synchronization is not in time under high concurrency. The method comprises the steps of utilizing the data synchronization device to receive data synchronization instructions coming from a first database, and enabling the data synchronization instructions to be generated by the first database when data in the first database are modified; utilizing the data synchronization device to read a modification log of the first database according to the data synchronization instructions; utilizing the data synchronization device to determine a data synchronization mode needing adopting according to the modification log, and enabling the data synchronization mode needing adopting to comprise a single-thread synchronization mode or a multi-thread synchronization mode; utilizing the data synchronization device to enable the data modified in the first database to be synchronized in at least two databases except the first database according to the data synchronization mode needing adopting and the modification log.
Description
Technical field
The present invention relates to Database Systems technical field, relate in particular to a kind of data synchronous system, method and device.
Background technology
In the interactive system based on client/server network structure, on server, deposit up-to-date interaction data, wherein server includes master data base and some from database, and client is (as mobile phone terminal, Mail Clients etc.) needs of searching in order to improve access speed or off-line, can in local reservoir, retain the data trnascription of a buffer memory, the associated person information that user searches and accesses in client is all to obtain from local data trnascription, the data content that this just needs the master-slave database of server immediately synchronously to upgrade, make in data trnascription information and server, to be consistent in client, guarantee that the information that user obtains is accurately with effective, in addition, in client (as mobile phone terminal, Mail Clients etc.) in the time of need to writing new data to server, for guaranteeing other clients, can obtain in time the latest data of server, also the data content that needs the master-slave database of server immediately synchronously to upgrade.
In prior art, the synchronous mode of data is: after the data on server are modified, master data base more new data is synchronized to other from database, so that client removes to obtain more new data to any database.Although this, concentrate synchronous mode can make the data of client and database be consistent, but also there is very large problem: because the resource on database is (as the network bandwidth, disk I/O, CPU processing power etc.) be limited, when a large amount of client concurrent requests are synchronous, can cause the slack-off request of even refusing client of service impact, increase along with client terminal quantity, it is more and more serious that server resource problem can become, between master-slave database, need just can complete for a long time synchronous, synchronization failure even, need to wait the master data base could re-synchronization after the free time, cause the data trnascription information in client inconsistent with the period of service within a period of time, user cannot find up-to-date information, not only have a strong impact on user's use, reduced the work efficiency of server simultaneously.
Summary of the invention
Embodiments of the invention provide a kind of data synchronous system, method and device, by the modification daily record that utilizes data synchronization unit to read the first database, determine the position that needs synchrodata in other databases, and then data synchronization unit is synchronized to other databases by the data that are modified, changed the data synchronous architecture between original principal and subordinate's server, solved height and given the synchronous problem not in time of data.
For achieving the above object, embodiments of the invention adopt following technical scheme:
Embodiments of the invention provide a kind of data synchronous system, comprise at least two databases, and the data synchronization unit being connected with described at least two databases, wherein, in described at least two databases, include the first database;
Described data synchronization unit, for receiving the data synchronic command from the first database, described data synchronic command be the data in described the first database while being modified described in the first database generate; And according to described data synchronic command, read the modification daily record of described the first database; And according to described modification daily record, determine the data method of synchronization that needs employing, the described data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization; And according to the described data method of synchronization and the described modification daily record need adopting, described in the data that are modified in described the first database are synchronized at least two databases in the database except described the first database;
Described the first database, for sending described data synchronic command to described data synchronization unit, and allows described data synchronization unit to read described modification daily record;
Database in described at least two databases except described the first database, the data that are modified for receiving described first database of described data synchronization unit transmission.
Described modification daily record comprises stating to some extent and in the first database, is modified the content of data and is modified Global ID corresponding to data, and described Global ID is used to indicate the position of every data line in described the first database, wherein,
Described data synchronization unit, specifically for according to described modification daily record, reads the information that is modified data recording in described modification daily record, in the information that every is modified data, all comprises and is modified Global ID corresponding to data; And judge that whether each Global ID is consistent; If consistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the single-threaded method of synchronization; If inconsistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the multithreading method of synchronization; And the number N that calculates inconsistent Global ID in described each Global ID, N is greater than 1 integer; And to the database except described the first database, open N bar synchronizing thread respectively.
Embodiments of the invention provide a kind of method of data synchronization, comprise at least two databases, and described method comprises:
Data synchronization unit receives the data synchronic command from the first database, described data synchronic command be the data in described the first database while being modified described in the first database generate;
Described data synchronization unit, according to described data synchronic command, reads the modification daily record of described the first database;
Described data synchronization unit, according to described modification daily record, is determined the data method of synchronization that needs employing, and the described data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization;
Described data synchronization unit is according to the described data method of synchronization and the described modification daily record need adopting, described in the data that are modified in described the first database are synchronized at least two databases in the database except described the first database.
Described modification daily record comprises stating to some extent and in the first database, is modified the content of data and is modified Global ID corresponding to data, and described Global ID is used to indicate the position of every data line in described the first database.
Described data synchronization unit, according to described modification daily record, is determined the data method of synchronization that needs employing, and the described data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization, comprising:
Described data synchronization unit, according to described modification daily record, reads the information that is modified data recording in described modification daily record, in the information that every is modified data, all comprises and is modified Global ID corresponding to data;
Described data synchronization unit judges that whether each Global ID is consistent;
If consistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the single-threaded method of synchronization;
If inconsistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the multithreading method of synchronization.
If described inconsistent, described data synchronization unit determines that the described data method of synchronization that needs to adopt is after the multithreading method of synchronization, also comprises:
Described data synchronization unit calculates the number N of inconsistent Global ID in described each Global ID, and N is greater than 1 integer;
Described data synchronization unit is opened N bar synchronizing thread to the database except described the first database respectively.
Embodiments of the invention provide a kind of data synchronization unit, comprising:
Receiving element, receives the data synchronic command from the first database for data synchronization unit, described data synchronic command be the data in described the first database while being modified described in the first database generate;
Reading unit, according to described data synchronic command, reads the modification daily record of described the first database for described data synchronization unit;
Processing unit, according to described modification daily record, determines the data method of synchronization that needs employing for described data synchronization unit, and the described data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization;
Lock unit, for described data synchronization unit according to the described data method of synchronization and the described modification daily record need adopting, described in the data that are modified in described the first database are synchronized at least two databases in the database except described the first database.
Described modification daily record comprises stating to some extent and in the first database, is modified the content of data and is modified Global ID corresponding to data, and described Global ID is used to indicate the position of every data line in described the first database.
Described processing unit, according to described modification daily record, reads the information that is modified data recording in described modification daily record for described data synchronization unit, in the information that every is modified data, all comprises and is modified Global ID corresponding to data; Described data synchronization unit judges that whether each Global ID is consistent; If consistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the single-threaded method of synchronization; If inconsistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the multithreading method of synchronization.
Described processing unit, the number N of each inconsistent Global ID of Global ID described in also calculating for described data synchronization unit, N is greater than 1 integer; Described data synchronization unit is opened N bar synchronizing thread to the database except described the first database respectively.
Embodiments of the invention provide a kind of method of data synchronization, Apparatus and system, by the modification daily record that utilizes data synchronization unit to read the first database, determine the position that needs synchrodata in other databases, and then data synchronization unit is synchronized to other databases by the data that are modified, changed the data synchronous architecture between original principal and subordinate's server, solve height and given the synchronous problem not in time of data between original principal and subordinate's server, rebuild between server the new architecture regardless of principal and subordinate, not only solved and between database, carried out the synchronous latency issue of data, also solve user terminal and server and carried out service latency issue when mutual, greatly improved the work efficiency of server.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic flow sheet one of a kind of method of data synchronization that Fig. 1 provides for the embodiment of the present invention;
The schematic flow sheet two of a kind of method of data synchronization that Fig. 2 provides for the embodiment of the present invention;
The schematic flow sheet three of a kind of method of data synchronization that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of data synchronous system that Fig. 4 provides for the embodiment of the present invention;
The structural representation of a kind of data synchronization unit that Fig. 5 provides for the embodiment of the present invention.
Embodiment
In below describing, in order to illustrate rather than in order limiting, to have proposed the detail such as particular system structure, interface, technology, to thoroughly understand the present invention.Yet, not it will be clear to one skilled in the art that in there is no other embodiment of these details and can realize the present invention yet.In other situation, omit the detailed description to well-known device, circuit and method, in order to avoid unnecessary details hinders description of the invention.In addition, term " system " and " network " are often used interchangeably in this article herein.
Embodiment mono-
Embodiments of the invention provide a kind of method of data synchronization, as shown in Figure 1, comprising:
101, data synchronization unit receives the data synchronic command from the first database.
Wherein, the data synchronic command in the present embodiment be data in the first database while being modified the first database generate.In addition, the data synchronization unit in the embodiment of the present invention can include Jia Laila copied cells (Galera Replication) and write set copied cells (WSREP).
Embodiments of the invention provide a kind of method of data synchronization, data synchronization unit and data synchronous system, by the modification daily record that utilizes data synchronization unit to read the first database, determine the position that needs synchrodata in other databases, and then data synchronization unit is synchronized to other databases by the data that are modified, changed the data synchronous architecture between original principal and subordinate's server, solve height and given the synchronous problem not in time of data between original principal and subordinate's server, rebuild between server the new architecture regardless of principal and subordinate, not only solved and between database, carried out the synchronous latency issue of data, also solve user terminal and server and carried out service latency issue when mutual, greatly improved the work efficiency of server.
Exemplary, in the interactive system based on client/server network structure, client can write new data to server side, so that other clients can obtain up-to-date information from server side, wherein, server side can comprise a plurality of at least two databases, and the data synchronization unit being connected with at least two databases, client writes the data of renewal in a certain database, using this database as the first database, this first database need to be synchronized to the data of upgrading in other databases, so that can obtain in time up-to-date data message during other user side request msgs.When the data in the first database are modified, it is synchronous that generated data synchronic command designation data synchronous device carries out data to other databases except the first database, to guarantee consistance and the integrality of the data of server side.
102, data synchronization unit, according to data synchronic command, reads the modification daily record of the first database.
Wherein, revise daily record and include and in the first database, be modified the content of data and be modified Global ID corresponding to data, Global ID is used to indicate the position of every data line in the first database.For example, in the first database, the Global ID of the first row data is 101, in the first database, the Global ID of the second row data is 102, and this Global ID is used to indicate the position of every data line in the first database, so that data synchronization unit carries out synchronous operation to the data of other databases.
Concrete, after data synchronization unit receives the data synchronic command from the first database, it is synchronous that this instruction designation data synchronous device carries out data to other databases except the first database, now data synchronization unit reads the modification daily record of the first database, thereby determines that the data in concrete which place in the first database are changed.
103, data synchronization unit, according to revising daily record, is determined the data method of synchronization that needs employing.
Wherein, the above-mentioned data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization.The single-threaded method of synchronization is only used a thread passage to complete the transmission of data, and the single-threaded Program path of synchronously walking when executive routine is according under consecutive order row, must handle well above, just can carry out below.Accordingly, the multithreading method of synchronization is used many thread passages to complete the transmission of data simultaneously.
Concrete; data synchronization unit determines that according to revising daily record the method for the data method of synchronization that needs employing can comprise: data synchronization unit is according to revising daily record; read the information that is modified data recording in daily record of revising, in the information that every is modified data, all comprise and be modified Global ID corresponding to data; Data synchronization unit judges that whether each Global ID is consistent; If consistent, data synchronization unit determines that needing the data method of synchronization adopting is the single-threaded method of synchronization; If inconsistent, data synchronization unit determines that needing the data method of synchronization adopting is the multithreading method of synchronization.
104, the data method of synchronization that data synchronization unit adopts according to need and revise daily record, is synchronized to the data that are modified in the first database in above-mentioned at least two databases in the database except the first database.
Concrete, if data synchronization unit determines that needing the data method of synchronization adopting is the single-threaded method of synchronization, data synchronization unit is according to revising indicated unique Global ID in daily record so, and the data that are modified in the first database are synchronized in above-mentioned at least two databases in the database except the first database.Wherein, if there are a plurality of identical Global IDs, in order to guarantee that the operation of same Global ID can operate in order, so the operation of this Global ID can only sequentially be carried out, after first operation sends, after data synchronization unit receives synchronously successfully sign, then send the next one operation in this Global ID.
If data synchronization unit determines that needing the data method of synchronization adopting is the multithreading method of synchronization, data synchronization unit is according to revising indicated different Global ID in daily record so, respectively the data that are modified corresponding to different Global IDs is synchronized in above-mentioned at least two databases in the database except the first database.
Embodiments of the invention provide a kind of method of data synchronization, by data synchronization unit, receive the data synchronic command from the first database, data synchronic command be the data in the first database while being modified the first database generate; Data synchronization unit, according to data synchronic command, reads the modification daily record of the first database; Data synchronization unit, according to revising daily record, is determined the data method of synchronization that needs employing, needs the data method of synchronization adopting to comprise the single-threaded method of synchronization or the multithreading method of synchronization; The data method of synchronization that data synchronization unit adopts according to need and modification daily record, by the database except the first database in synchronous at least two databases of the data that are modified in the first database.This scheme determines by the modification daily record that utilizes data synchronization unit to read the first database the position that needs synchrodata in other databases, and then data synchronization unit is synchronized to other databases by the data that are modified, changed the data synchronous architecture between original principal and subordinate's server, solve height and given the synchronous problem not in time of data between original principal and subordinate's server, rebuild between server the new architecture regardless of principal and subordinate, not only solved and between database, carried out the synchronous latency issue of data, also solve user terminal and server and carried out service latency issue when mutual, greatly improved the work efficiency of server.
Embodiment bis-
Embodiments of the invention provide a kind of method of data synchronization, as shown in Figure 2, comprising:
201, data synchronization unit receives the data synchronic command from the first database.
Wherein, the data synchronic command in the present embodiment be data in the first database while being modified the first database generate.
Embodiments of the invention provide a kind of method of data synchronization, data synchronization unit and data synchronous system, by the modification daily record that utilizes data synchronization unit to read the first database, determine the position that needs synchrodata in other databases, and then data synchronization unit is synchronized to other databases by the data that are modified, changed the data synchronous architecture between original principal and subordinate's server, solve height and given the synchronous problem not in time of data between original principal and subordinate's server, rebuild between server the new architecture regardless of principal and subordinate, not only solved and between database, carried out the synchronous latency issue of data, also solve user terminal and server and carried out service latency issue when mutual, greatly improved the work efficiency of server.
Exemplary, in the interactive system based on client/server network structure, client can write new data to server side, so that other clients can obtain up-to-date information from server side, wherein, server side can comprise a plurality of at least two databases, and the data synchronization unit being connected with at least two databases, client writes the data of renewal in a certain database, using this database as the first database, this first database need to be synchronized to the data of upgrading in other databases, so that can obtain in time up-to-date data message during other user side request msgs.When the data in the first database are modified, it is synchronous that generated data synchronic command designation data synchronous device carries out data to other databases except the first database, to guarantee consistance and the integrality of the data of server side.
202, data synchronization unit, according to data synchronic command, reads the modification daily record of the first database.
Wherein, revise daily record and include and in the first database, be modified the content of data and be modified Global ID corresponding to data, Global ID is used to indicate the position of every data line in the first database.For example, in the first database, the Global ID of the first row data is A, in the first database, the Global ID of the second row data is B, and this Global ID is used to indicate the position of every data line in the first database, so that data synchronization unit carries out synchronous operation to the data of other databases.
Concrete, after data synchronization unit receives the data synchronic command from the first database, it is synchronous that this instruction designation data synchronous device carries out data to other databases except the first database, now data synchronization unit reads the modification daily record of the first database, thereby determines that the data in concrete which place in the first database are changed.
203, data synchronization unit, according to revising daily record, reads the information that is modified data recording in daily record of revising, and in the information that every is modified data, all comprises and is modified Global ID corresponding to data.
Exemplary, the partial content of revising daily record can be as shown in table 1.
Table 1
| Global ID's numbering | The sequence of operation |
| GTID1 | Insert，update，delete |
| GTID2 | Insert，update，delete |
| GTID1 | Insert，update，delete |
If it is consistent that 204 data synchronization units judge each Global ID, determine that needing the data method of synchronization adopting is the single-threaded method of synchronization.
Concrete, after data synchronization unit is according to the information that is modified data recording in revising log read modification daily record, whether each Global ID that judgement is revised in daily record is consistent, for example, if each Global ID is consistent (3 Global IDs of revising in daily record is all * * *-* *), determine that needing the data method of synchronization adopting is the single-threaded method of synchronization.The single-threaded method of synchronization is only used a thread passage to complete the transmission of data, and the single-threaded Program path of synchronously walking when executive routine is according under consecutive order row, must handle well above, just can carry out below.
If it is inconsistent that 205 data synchronization units judge each Global ID, data synchronization unit determines that needing the data method of synchronization adopting is the multithreading method of synchronization.
Concrete, after data synchronization unit is according to the information that is modified data recording in revising log read modification daily record, whether each Global ID that judgement is revised in daily record is consistent, for example, as shown in table 1,3 Global IDs of revising in daily record are not consistent, determine that needing the data method of synchronization adopting is the multithreading method of synchronization.
Further, if data synchronization unit determines that needing the data method of synchronization adopting is the multithreading method of synchronization, as shown in Figure 3, embodiments of the invention provide a kind of method of data synchronization also to comprise step 301-302.
301, data synchronization unit calculates the number N of inconsistent Global ID in each Global ID, and N is greater than 1 integer.
Concrete, after data synchronization unit is according to the information that is modified data recording in revising log read modification daily record, whether each Global ID that judgement is revised in daily record is consistent, for example, as shown in table 1, revise in 3 Global IDs in daily record, there is one for GTID2, two other Global ID is all GTID1, and data synchronization unit is determined the number 2 of the interior inconsistent Global ID of modification daily record of table 1 correspondence so, in the first database, has two row data to be modified.
302, data synchronization unit is opened N bar synchronizing thread to the database except the first database respectively.
Concrete, after data synchronization unit is determined the number N of inconsistent Global ID in each Global ID, according to the concrete numerical value of N, open N bar synchronizing thread and respectively the corresponding position of the database except the first database is carried out synchronously.As shown in table 1, the number 2 of inconsistent Global ID in the modification daily record of table 1 correspondence, in the first database, there are two row data to be modified, data synchronization unit is opened 2 synchronizing threads to the database except the first database respectively so, revise respectively the data of correspondence position in the database except the first database, and then complete the synchronous operation of database.
206, the data method of synchronization that data synchronization unit adopts according to need and revise daily record, is synchronized to the data that are modified in the first database in above-mentioned at least two databases in the database except the first database.
Concrete, if data synchronization unit determines that needing the data method of synchronization adopting is the single-threaded method of synchronization, data synchronization unit is according to revising indicated unique Global ID in daily record so, and the data that are modified in the first database are synchronized in above-mentioned at least two databases in the database except the first database.Wherein, if there are a plurality of identical Global IDs, in order to guarantee that the operation of same Global ID can operate in order, so the operation of this Global ID can only sequentially be carried out, after first operation sends, after data synchronization unit receives synchronously successfully sign, then send the next one operation in this Global ID.
If data synchronization unit determines that needing the data method of synchronization adopting is the multithreading method of synchronization, data synchronization unit is according to revising indicated different Global ID in daily record so, respectively the data that are modified corresponding to different Global IDs is synchronized in above-mentioned at least two databases in the database except the first database.
Embodiments of the invention provide a kind of method of data synchronization, by data synchronization unit, receive the data synchronic command from the first database, data synchronic command be the data in the first database while being modified the first database generate; Data synchronization unit, according to data synchronic command, reads the modification daily record of the first database; Data synchronization unit, according to revising daily record, is determined the data method of synchronization that needs employing, needs the data method of synchronization adopting to comprise the single-threaded method of synchronization or the multithreading method of synchronization; The data method of synchronization that data synchronization unit adopts according to need and modification daily record, by the database except the first database in synchronous at least two databases of the data that are modified in the first database.This scheme determines by the modification daily record that utilizes data synchronization unit to read the first database the position that needs synchrodata in other databases, and then data synchronization unit is synchronized to other databases by the data that are modified, changed the data synchronous architecture between original principal and subordinate's server, solve height and given the synchronous problem not in time of data between original principal and subordinate's server, rebuild between server the new architecture regardless of principal and subordinate, not only solved and between database, carried out the synchronous latency issue of data, also solve user terminal and server and carried out service latency issue when mutual, greatly improved the work efficiency of server.
Embodiment tri-
Embodiments of the invention provide a kind of data synchronous system, as shown in Figure 4, comprise at least two databases 1, and the data synchronization unit 01 being connected with at least two databases, wherein, at least two databases, include the first database 02 and the database except the first database 03;
Data synchronization unit 01, for receiving the data synchronic command from the first database, data synchronic command be the data in the first database while being modified the first database generate; And according to data synchronic command, read the modification daily record of the first database; And according to revising daily record, determine the data method of synchronization that needs employing, need the data method of synchronization adopting to comprise the single-threaded method of synchronization or the multithreading method of synchronization; And the data method of synchronization adopting according to need and revise daily record, the data that are modified in the first database are synchronized at least two databases in the database except the first database;
The first database 02, for sending data synchronic command to data synchronization unit, and allows data synchronization unit to read modification daily record;
Embodiments of the invention provide a kind of data synchronous system, by data synchronization unit, receive the data synchronic command from the first database, data synchronic command be the data in the first database while being modified the first database generate; Data synchronization unit, according to data synchronic command, reads the modification daily record of the first database; Data synchronization unit, according to revising daily record, is determined the data method of synchronization that needs employing, needs the data method of synchronization adopting to comprise the single-threaded method of synchronization or the multithreading method of synchronization; The data method of synchronization that data synchronization unit adopts according to need and modification daily record, by the database except the first database in synchronous at least two databases of the data that are modified in the first database.This scheme determines by the modification daily record that utilizes data synchronization unit to read the first database the position that needs synchrodata in other databases, and then data synchronization unit is synchronized to other databases by the data that are modified, changed the data synchronous architecture between original principal and subordinate's server, solve height and given the synchronous problem not in time of data between original principal and subordinate's server, rebuild between server the new architecture regardless of principal and subordinate, not only solved and between database, carried out the synchronous latency issue of data, also solve user terminal and server and carried out service latency issue when mutual, greatly improved the work efficiency of server.
Embodiment tetra-
Embodiments of the invention provide a kind of data synchronization unit, as shown in Figure 5, comprising:
Receiving element 11, receives the data synchronic command from the first database for data synchronization unit, data synchronic command be the data in the first database while being modified the first database generate;
Reading unit 12, according to data synchronic command, reads the modification daily record of the first database for data synchronization unit;
Processing unit 13, according to revising daily record, determines the data method of synchronization that needs employing for data synchronization unit, needs the data method of synchronization adopting to comprise the single-threaded method of synchronization or the multithreading method of synchronization;
Lock unit 14, the data method of synchronization adopting according to need for data synchronization unit and revise daily record, is synchronized to the data that are modified in the first database at least two databases in the database except the first database.
Further, revise daily record and include and in the first database, be modified the content of data and be modified Global ID corresponding to data, Global ID is used to indicate the position of every data line in the first database.
Further, processing unit 13, according to revising daily record, reads the information that is modified data recording in daily record of revising for data synchronization unit, in the information that every is modified data, all comprises and is modified Global ID corresponding to data; Data synchronization unit judges that whether each Global ID is consistent; If consistent, data synchronization unit determines that needing the data method of synchronization adopting is the single-threaded method of synchronization; If inconsistent, data synchronization unit determines that needing the data method of synchronization adopting is the multithreading method of synchronization.
Further, processing unit 13, also calculates the number N of each inconsistent Global ID of Global ID for data synchronization unit, and N is greater than 1 integer; Data synchronization unit is opened N bar synchronizing thread to the database except the first database respectively.
Embodiments of the invention provide a kind of data synchronization unit, by data synchronization unit, receive the data synchronic command from the first database, data synchronic command be the data in the first database while being modified the first database generate; Data synchronization unit, according to data synchronic command, reads the modification daily record of the first database; Data synchronization unit, according to revising daily record, is determined the data method of synchronization that needs employing, needs the data method of synchronization adopting to comprise the single-threaded method of synchronization or the multithreading method of synchronization; The data method of synchronization that data synchronization unit adopts according to need and modification daily record, by the database except the first database in synchronous at least two databases of the data that are modified in the first database.This scheme determines by the modification daily record that utilizes data synchronization unit to read the first database the position that needs synchrodata in other databases, and then data synchronization unit is synchronized to other databases by the data that are modified, changed the data synchronous architecture between original principal and subordinate's server, solve height and given the synchronous problem not in time of data between original principal and subordinate's server, rebuild between server the new architecture regardless of principal and subordinate, not only solved and between database, carried out the synchronous latency issue of data, also solve user terminal and server and carried out service latency issue when mutual, greatly improved the work efficiency of server.
Those skilled in the art can be well understood to, for convenience and simplicity of description, only the division with above-mentioned each functional module is illustrated, in practical application, can above-mentioned functions be distributed and by different functional modules, completed as required, the inner structure that is about to device is divided into different functional modules, to complete all or part of function described above.The system of foregoing description, the specific works process of device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
In the several embodiment that provide in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described module or unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and also can adopt the form of SFU software functional unit to realize.
If the form of SFU software functional unit of usining described integrated unit realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.Understanding based on such, the all or part of of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) carry out all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a data synchronous system, is characterized in that, comprises at least two databases, and the data synchronization unit being connected with described at least two databases, wherein, in described at least two databases, includes the first database;
Described data synchronization unit, for receiving the data synchronic command from the first database, described data synchronic command be the data in described the first database while being modified described in the first database generate; And according to described data synchronic command, read the modification daily record of described the first database; And according to described modification daily record, determine the data method of synchronization that needs employing, the described data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization; And according to the described data method of synchronization and the described modification daily record need adopting, described in the data that are modified in described the first database are synchronized at least two databases in the database except described the first database;
Described the first database, for sending described data synchronic command to described data synchronization unit, and allows described data synchronization unit to read described modification daily record;
Database in described at least two databases except described the first database, the data that are modified for receiving described first database of described data synchronization unit transmission.
2. data synchronous system according to claim 1, it is characterized in that, described modification daily record comprises stating to some extent and in the first database, is modified the content of data and is modified Global ID corresponding to data, and described Global ID is used to indicate the position of every data line in described the first database, wherein
Described data synchronization unit, specifically for according to described modification daily record, reads the information that is modified data recording in described modification daily record, in the information that every is modified data, all comprises and is modified Global ID corresponding to data; And judge that whether each Global ID is consistent; If consistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the single-threaded method of synchronization; If inconsistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the multithreading method of synchronization; And the number N that calculates inconsistent Global ID in described each Global ID, N is greater than 1 integer; And to the database except described the first database, open N bar synchronizing thread respectively.
3. a method of data synchronization, is characterized in that, comprises at least two databases, and described method comprises:
Data synchronization unit receives the data synchronic command from the first database, described data synchronic command be the data in described the first database while being modified described in the first database generate;
Described data synchronization unit, according to described data synchronic command, reads the modification daily record of described the first database;
Described data synchronization unit, according to described modification daily record, is determined the data method of synchronization that needs employing, and the described data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization;
Described data synchronization unit is according to the described data method of synchronization and the described modification daily record need adopting, described in the data that are modified in described the first database are synchronized at least two databases in the database except described the first database.
4. method according to claim 3, it is characterized in that, described modification daily record comprises stating to some extent and in the first database, is modified the content of data and is modified Global ID corresponding to data, and described Global ID is used to indicate the position of every data line in described the first database.
5. method according to claim 3, it is characterized in that, described data synchronization unit, according to described modification daily record, is determined the data method of synchronization that needs employing, the described data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization, comprising:
Described data synchronization unit, according to described modification daily record, reads the information that is modified data recording in described modification daily record, in the information that every is modified data, all comprises and is modified Global ID corresponding to data;
Described data synchronization unit judges that whether each Global ID is consistent;
If consistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the single-threaded method of synchronization;
If inconsistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the multithreading method of synchronization.
6. method according to claim 5, is characterized in that, if described inconsistent, described data synchronization unit determines that the described data method of synchronization that needs to adopt is after the multithreading method of synchronization, also comprises:
Described data synchronization unit calculates the number N of inconsistent Global ID in described each Global ID, and N is greater than 1 integer;
Described data synchronization unit is opened N bar synchronizing thread to the database except described the first database respectively.
7. a data synchronization unit, is characterized in that, comprising:
Receiving element, receives the data synchronic command from the first database for data synchronization unit, described data synchronic command be the data in described the first database while being modified described in the first database generate;
Reading unit, according to described data synchronic command, reads the modification daily record of described the first database for described data synchronization unit;
Processing unit, according to described modification daily record, determines the data method of synchronization that needs employing for described data synchronization unit, and the described data method of synchronization adopting that needs comprises the single-threaded method of synchronization or the multithreading method of synchronization;
Lock unit, for described data synchronization unit according to the described data method of synchronization and the described modification daily record need adopting, described in the data that are modified in described the first database are synchronized at least two databases in the database except described the first database.
8. data synchronization unit according to claim 7, it is characterized in that, described modification daily record comprises stating to some extent and in the first database, is modified the content of data and is modified Global ID corresponding to data, and described Global ID is used to indicate the position of every data line in described the first database.
9. data synchronization unit according to claim 7, is characterized in that,
Described processing unit, according to described modification daily record, reads the information that is modified data recording in described modification daily record for described data synchronization unit, in the information that every is modified data, all comprises and is modified Global ID corresponding to data; Described data synchronization unit judges that whether each Global ID is consistent; If consistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the single-threaded method of synchronization; If inconsistent, described data synchronization unit determines that the described data method of synchronization that need adopt is the multithreading method of synchronization.
10. data synchronization unit according to claim 9, is characterized in that,
Described processing unit, the number N of each inconsistent Global ID of Global ID described in also calculating for described data synchronization unit, N is greater than 1 integer; Described data synchronization unit is opened N bar synchronizing thread to the database except described the first database respectively.
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