CN103064976A - Data for exchanging data among homogenous and heterogenous DBMSs (database management systems) on basis of active database technology - Google Patents
Data for exchanging data among homogenous and heterogenous DBMSs (database management systems) on basis of active database technology Download PDFInfo
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Abstract
The invention discloses a method for exchanging and synchronizing data among homogenous and heterogenous DBMSs (database management systems) on the basis of an active database technology. The method is used for conveniently and efficiently exchanging and synchronizing data among homogenous and heterogenous databases. The method includes steps of determining data environments of a source end and a target end with data to be synchronized; determining a corresponding relation between the data of the target end and the data of the source end; creating an initialization table and a log table in a database of the source end; forming corresponding operating commands in the database of the source end by the aid of data required for synchronization initialization in a storage process, and writing the operating commands into the created initialization table; creating inserting, modifying and deleting triggers on tables related to the source end with the data to be synchronized, splicing the synchronization operating commands required to be executed at the target end into character strings whenever the data change, and using the character strings as values of fields of operating commands of the log table to form a record in the log table; and exchanging and synchronizing the data. The operating commands are executed at the target end.
Description
Technical field
The present invention relates to database field, particularly a kind of based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology.
Background technology
At present, each enterprises and institutions is along with the continuous propelling of informatization, and different application systems constantly increase.But because application department is different, the exploitation carrier is different, development platform is different, the database isomerism is general, and particularly shortcoming is considered in the shared and exchange to information in each the application system construction, so that " information island " is more and more.This has not only affected data's consistency, reliability and authority, and causes the trade information service to be obstructed or limited, has affected the quality of informatization.Therefore, strengthening the basic database construction, carry out exchanges data between each application system and the basic database, is to guarantee enterprises and institutions' data reliability, conforming requisite measure.Therefore, Data Interchange Technology becomes one of hot technology of areas of information technology in recent years, and achievement in research constantly pushes away newly.Finishing science and technology according to Zhejiang Province's scientific and technical information research institute on November 29th, 2012 looks into newly, the related invention patent has in the recent period: (the software incorporated company of Hangzhou Newgrand of exchanges data and technology of sharing between a kind of heterogeneous system, Chinese invention patent: CN101957865A, open day: 2011.01.26), method for interchanging data (LANG CHAO GENERASOFT Co Ltd based on parallel processing, Chinese invention patent: CN1011969402A, open day: 2011.02.09), a kind of isomery, method for interchanging data between heterogeneous database and device thereof (Dalian million positive softcom limiteds, Chinese invention patent: CN102479182A, open day: 2012.05.30), the incremental data real-time synchronization apparatus and method of Log-based supervisory packet (UFSOFT Co Ltd, open day: 2012.06.20).Data Interchange Technology in these patents of invention provides feasible method for interchanging data.First three methods all is to do mass data processing, all needs the total data of source database end is transferred to target database at every turn, and volume of transmitted data is large, and time complexity is high.The 4th kind of method comprises two lock units.The first lock unit copies to the primary data in the first data source (source) in the second data source (destination end); The second lock unit, use the log management bag of the first data source to obtain the data manipulation statement of carrying out in the first data source, the data manipulation statement is applied to the second data source, synchronous to realize the incremental data between the first data source and the second data source, wherein, the log management bag has comprised storing process that the daily record of the first data source is analyzed, obtained data operation information from daily record, and data operation information comprises the sign of data manipulation statement, the operand of data manipulation statement and the affiliated affairs of data manipulation statement.There are 3 problems in this method, one, and the data that the method can only be used between the isomorphism database are synchronous.Because need an external sync application program to assist to finish synchronous working when heterogeneous database is synchronous.Its two, two data sources have to register in the same database server, only in this way, and could be synchronous by using storing process and affairs method to finish data.Its three, even the existence of synchronization program is arranged, need to be to the source data through can put in storage after calculating and processing the time when destination end, synchronization applications just needs change, makes troubles synchronously for data.
Summary of the invention
In order to solve the above-mentioned technical matters that exists in the prior art, the invention provides a kind ofly based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, be used to convenient, efficient exchanges data and the synchronous method of data are provided between heterogeneous database.The method comprises the steps:
One. the source that specified data is synchronous and destination end data environment;
Two. determine the corresponding relation of destination end and source data;
Three. in the source database, set up initial table and log sheet, comprise the operational order that field: ID, destination end are carried out in the described initial table, comprise field: ID, operational order, the action type of order, data modification time, synchronous regime, synchronous execution time that destination end is carried out in the described log sheet;
Four. in the database of source, utilize storing process with the operational order of the needed data correspondence of synchronous initiation in the destination end execution, and this operational order is write in the initial table of setting up in the step 3;
Five. on the table that the synchronous source of data relates to, set up and insert, revise, delete trigger, each data movement need to be spliced into character string in the synchronous operation order that destination end is carried out, and the value as the described operational order field of described log sheet forms a record in the log sheet;
Six. exchanges data and data synchronizing step:
(1) database configuration;
(2) target data library initialization;
(3) database synchronization.
Further, source described in the step 1 and destination end data environment comprise database engine, the table at synchronizing information place, the field that relates to.
Further, the corresponding relation of the destination end data of the exchange of specified data described in the step 2 and source data comprises definite source database table collection and the field, the destination end database table collection that relate to and the field that relates to.
Further, described in the step 5 in the log sheet synchronous regime field be made as not executing state.
Further, described target database initialization step comprises: with the source related data, copy to destination end, the first data consistent node that composition data is synchronous, according to data base configuration file, utilize the initial table in the step 4, initialization data is copied to the target database from source database.
Further, described database synchronization adopts synchronously instant or cycle synchronisation.
Further, described database synchronization is specially: read by the synchronous regime in the log sheet that obtains in the step 5 and be the action statement field of the record of executing state not, carry out this action statement in destination end, the synchronous regime of revising this record in the source log sheet is the executed state, charges to lock in time.
Use the method to make it possible to when exchanges data or data are synchronous, only incremental data is carried out, operation flow to the data operation all is encapsulated among the DBMS of source by the active database technology, has guaranteed the independence of exchanges data application program and database.The present invention has utilized database technology, active database technology, XML technology and JDBC technology.
Description of drawings
Fig. 1 is the database configuration process flow diagram;
Fig. 2 is the target database initialization flowchart;
Fig. 3 is the database synchronization process flow diagram.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
A kind of based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, comprise the steps:
1. the destination end of specified data exchange and the database engine of source are so that access.
2. the destination end data of specified data exchange and the corresponding relation of source data, and destination end business demand that the source data are calculated and processed.Comprise source database table collection and the field, the destination end database table collection that relate to and the field that relates to.
3. in the source database, create initial table and incremental data log sheet.Comprise the information such as operational order that ID, destination end are carried out in the initial table.Comprise the action type, data modification time, synchronous regime of operational order that ID, destination end carry out, order, the synchronous main information such as execution time in the incremental data log sheet.This point is and has one of key distinction of additive method now.
4. in the database of source, the operational order of utilizing storing process that the needed data correspondence of synchronous initiation in 6.2 is carried out in destination end is write in the initial table in 3.
5. the correlation table in source utilizes the active database technology,, data is carried out additions and deletions transform into and be condition as rule with trigger, and the synchronous operation statement that will carry out destination end is as event design and definition eca rule.Specific practice is, the active service function of utilizing the source data base management system (DBMS) to provide, increase, delete, change trigger in source table design, the action statement of the data synchronous operation of the destination end that the data movement of source is corresponding is combined into character string and inserts in 3 log sheets of describing, wherein, " synchronous regime " field is made as not executing state.With relating to synchronously the main operation of database side, be encapsulated among the DBMS, reduce the transmission load of network, the application program (application program of narration in 6) of accomplishing synchronization call and sync database are by stronger independence.This also is one of key distinction with existing additive method.
6. exchanges data and data synchronization applications step are set.The function of this step comprises: database configuration, target data library initialization and database synchronization three large major functions.
6.1 as shown in Figure 1, database configuration, the main realization is configured the database information of the residing working environment of this applying step, such as database engine, JDBC driving and required synchronous database information etc.The user arranges heterogeneous database and needs synchronizing information in the XML file behind the configuration data library information, comprises database name and the table that relates to etc.
6.2 as shown in Figure 2, the target data library initialization is realized the source related data, copies to destination end, the first data consistent node that composition data is synchronous.According to data base configuration file, utilize the initial table in 4, initialization data is copied to the target database from source database.
6.3 as shown in Figure 3, database synchronization, the instant or periodic incremental data synchronizing function of realization source database and target database.In the XML file, behind the configuration data library information, database, log sheet and the link information thereof of source and destination end is set synchronously, the method for synchronization (synchronously instant or cycle synchronisation) is set.Set up the interface channel between sync database.Utilize JAVA JDBC " affair mechanism ", to guarantee synchronous integrality and the consistance of data.Affairs begin, read by 4 " synchronous regimes " that write in 3 log sheets of describing and be " action statement " field of the record of executing state not, carry out this action statement in destination end, revising " synchronous regime " that should record in the source log sheet is the executed state, charge to lock in time, affairs finish.
Of the present invention based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology by database technology and active database technology, by storing process initialization operation statement collection is write initial table, by trigger incremental data is formed action statement with active service and be recorded in the log sheet.This process does not need the external application intervention, has played the maximum packaging effect of data synchronous operation to database side.Make the data synchronization applications program have preferably independence to different data synchronisation requirement.Namely when the data synchronisation requirement changes, only need to change storing process and trigger on the database server, and application program does not need change.
Because the operation (synchrodata preparation) to the source database realizes with database technology and active database technology, therefore, has not only reduced the data transmission between application program and the database server, and has improved the synchronous time efficiency of data.In data synchronization process, the DBA(data base administrator) only provides the access limit of initial table and the log sheet of source for application designer or operating personnel, to the destination end database, access limit to synchronous object table only is provided, and other all data are sealed the application program of data exchange.Therefore the present invention has ensured security and the authority of data better than other method.
Shown in the above and the figure only is preferred implementation of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from principle of the present invention, can also make some modification and improvement, these also should be considered as belonging to protection scope of the present invention.
Claims (7)
1. one kind based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, comprises the steps:
One. the source that specified data is synchronous and destination end data environment;
Two. determine the corresponding relation of destination end and source data;
Three. in the source database, set up initial table and log sheet, comprise the operational order that field: ID, destination end are carried out in the described initial table, comprise field: ID, operational order, the action type of order, data modification time, synchronous regime, synchronous execution time that destination end is carried out in the described log sheet;
Four. in the database of source, utilize storing process with the needed data of synchronous initiation, form the corresponding operational order of carrying out in destination end, and this operational order is write in the initial table of setting up in the step 3;
Five. on the table that the synchronous source of data relates to, set up and insert, revise, delete trigger, each data movement need to be spliced into character string in the synchronous operation order that destination end is carried out, and the value as the described operational order field of described log sheet forms a record in the log sheet;
Six. exchanges data and data synchronizing step:
(1) database configuration;
(2) target data library initialization;
(3) database synchronization.
2. as claimed in claim 1 based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, it is characterized in that: source described in the step 1 and destination end data environment comprise database engine, the table at synchronizing information place, the field that relates to.
3. as claimed in claim 1 based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, it is characterized in that: the destination end data of the exchange of specified data described in the step 2 and the corresponding relation of source data comprise determines source database table collection and the field, destination end database table collection and the aiming field that relate to.
4. as claimed in claim 1 based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, it is characterized in that: described in the step 5 in the log sheet synchronous regime field be made as not executing state.
5. as claimed in claim 1 based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, it is characterized in that: described target database initialization step comprises: with the source related data, copy to destination end, the first data consistent node that composition data is synchronous, according to data base configuration file, utilize the initial table in the step 4, initialization data is copied to the target database from source database.
6. as claimed in claim 1 based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, it is characterized in that: described database synchronization adopts synchronously instant or cycle synchronisation.
7. as claimed in claim 4 based on exchanges data and method of data synchronization between the same isomery DBMS of active database technology, it is characterized in that: described database synchronization is specially: read by the synchronous regime in the log sheet that obtains in the step 5 and be the action statement field of the record of executing state not, carry out this action statement in destination end, the synchronous regime of revising this record in the source log sheet is the executed state, charges to lock in time.
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| CN103970834A (en) * | 2014-04-02 | 2014-08-06 | 浙江大学 | Recovery method for incremental data synchronization fault in isomerous database synchronizing system |
| CN104331425A (en) * | 2014-10-20 | 2015-02-04 | 许继电气股份有限公司 | Data synchronization method for real-time database of power grid monitoring system |
| CN104346681A (en) * | 2013-08-08 | 2015-02-11 | 中国科学院计算机网络信息中心 | Method for actively acquiring data from heterogeneous enterprise information systems |
| CN104598531A (en) * | 2014-12-25 | 2015-05-06 | 广东电子工业研究院有限公司 | Incremental data migration method among heterogeneous relational databases based on trigger |
| CN104778175A (en) * | 2014-01-13 | 2015-07-15 | 世纪禾光科技发展（北京）有限公司 | Method and system for realizing data synchronization of heterogeneous database |
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| CN109614444B (en) * | 2018-11-12 | 2023-05-16 | 武汉达梦数据库股份有限公司 | Data initialization method during data synchronization |
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| CN112084259A (en) * | 2020-08-20 | 2020-12-15 | 中国船舶重工集团公司第七一五研究所 | Database real-time synchronization method based on extended field characteristic marking |
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Granted publication date: 20151028 Termination date: 20180114 |