CN104426923A - Data synchronization method and apparatus - Google Patents
Data synchronization method and apparatus Download PDFInfo
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- CN104426923A CN104426923A CN201310367360.0A CN201310367360A CN104426923A CN 104426923 A CN104426923 A CN 104426923A CN 201310367360 A CN201310367360 A CN 201310367360A CN 104426923 A CN104426923 A CN 104426923A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
- G06F16/275—Synchronous replication
Abstract
The invention discloses a data synchronization method and apparatus. The method comprises the following steps: after a first device performs data synchronization on a second device, the first device receiving verification information sent by the second device, the verification information being used for determining whether the data synchronization succeeds; the first device determining whether the data synchronization succeeds at least according to the verification information; and in case that the data synchronization fails, the first device performing the data synchronization on the second device. According to the invention, the problem of errors in the data synchronization among devices is solved, and the data synchronization reliability is improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method of data synchronization and device.
Background technology
The simultaneous techniques of existing memory database between active and standby and multimode (during when multiple module, No. 1 module data is distributed to other module as reference data) more adopts change list and the synchronous mode of change records, when showing and record changes, the packing of these delta datas is sent to standby host or other module, just when data change, just meeting trigger data is synchronous for these synchronization mechanisms, and whether the judgment mechanism of data variation is table record revise, if do not have data modification would not trigger data synchronous.
Because network environment is complicated, between active and standby and multimode, data are all straddle message, message goes out receiving terminal in active or synchronizing process unavoidably and occurs abnormal phenomenon, especially after synchronously completing, the region memory that receiving terminal appearance record is deposited is by situation about stepping on, this situation is generally difficult to find, and if now No. 1 module data do not occur amendment also would not trigger data synchronous, the data of this situation standby host and other module just there will be mistake.If carried out masterslave switchover in this case, then can there is unknown disaster in system.
For the problem that in correlation technique, between equipment, synchrodata is made mistakes, at present effective solution is not yet proposed.
Summary of the invention
The invention provides a kind of method of data synchronization and device, with the problem that at least between solution equipment, synchrodata is made mistakes.
According to an aspect of the present invention, provide a kind of method of data synchronization, comprising: to carry out to the second equipment after data syn-chronization completes at the first equipment, described first equipment receives the check information that described second equipment sends, wherein, described check information is used for determining that whether described data syn-chronization is successful; According to described check information, described first equipment at least judges that whether described data syn-chronization is successful; When described failure of data synchronization, described first equipment carries out data syn-chronization to described second equipment.
Preferably, when described first equipment and/or the local idle device resource of described second equipment exceed threshold value, described method of data synchronization is started; Or, receive starting command, start described method of data synchronization.
Preferably, described equipment comprise following one of at least: processor resource, memory source, bandwidth resources, IO resource.
Preferably, when described check information comprises versions of data, according to described check information, described first equipment judges whether described data syn-chronization successfully comprises: described first equipment judges whether the versions of data from versions of data number and described first equipment of described second equipment is number identical, if identical, then determine data syn-chronization success, if not identical, then determine failure of data synchronization.
Preferably, when data syn-chronization be database data, described check information comprises: the School Affairs that described second equipment calculates the part or all of record in the reservation chart in database, according to described check information, described first equipment judges whether described data syn-chronization successfully comprises: in the table corresponding with described reservation chart that described first equipment stores this locality, corresponding record calculates the School Affairs of described first equipment; Described first equipment judges that whether the School Affairs of described second equipment is identical with the School Affairs of described first equipment, if identical, determine data syn-chronization success, if not identical, then determines failure of data synchronization.
According to a further aspect in the invention, provide a kind of data synchronization unit, be arranged in the first equipment, it is characterized in that, comprising: receiver module, after data syn-chronization completes, receiving the check information that described second equipment sends for carrying out to the second equipment at the first equipment, wherein, described check information is used for determining that whether described data syn-chronization is successful; According to described check information, judge module, at least judging that whether described data syn-chronization is successful; Synchronization module, for when described failure of data synchronization, carries out data syn-chronization to described second equipment.
Preferably, data synchronization unit also comprises: start module, for when described first equipment and/or the local idle device resource of described second equipment exceed threshold value, starts described data synchronization unit; Or, for receiving starting command, start described data synchronization unit.
Preferably, described device resource comprise following one of at least: processor resource, memory source, bandwidth resources, IO resource.
Preferably, described judge module is also for when described check information comprises versions of data, judge whether the versions of data from versions of data number and described first equipment of described second equipment is number identical, if identical, then determine data syn-chronization success, if not identical, then determine failure of data synchronization.
Preferably, when data syn-chronization be database data, described check information comprises: the School Affairs that described second equipment calculates the part or all of record in the reservation chart in database, described judge module also calculates the School Affairs of described first equipment for corresponding record in the table corresponding with described reservation chart that store this locality, judge that whether the School Affairs of described second equipment is identical with the School Affairs of described first equipment, if identical, determine data syn-chronization success, if not identical, then determine failure of data synchronization.
By the present invention, adopt and to carry out to the second equipment after data syn-chronization completes at the first equipment, the first equipment receives the check information that the second equipment sends, and wherein, check information is used for determining data syn-chronization whether success; According to this check information, first equipment at least judges that whether data syn-chronization is successful; When failure of data synchronization, the first equipment carries out data syn-chronization to the second equipment, solves the problem that synchrodata between equipment is made mistakes, and improves the reliability of data syn-chronization.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the method for data synchronization according to the embodiment of the present invention;
Fig. 2 is the structure chart of the data synchronization unit according to the embodiment of the present invention;
Fig. 3 is memory database data inspection according to the preferred embodiment of the invention and synchronous structure chart;
Fig. 4 is data checks according to the preferred embodiment of the invention and synchronous flow chart;
Fig. 5 is internal memory data base synchronous data verifying function module topology structure chart according to the preferred embodiment of the invention;
Fig. 6 is that internal memory data base synchronous data verifies interaction figure according to the preferred embodiment of the invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Provide a kind of method of data synchronization in the present embodiment, Fig. 1 is the flow chart of the method for data synchronization according to the embodiment of the present invention, and as shown in Figure 1, the method comprises following step:
Step S102, to carry out after data syn-chronization completes to the second equipment at the first equipment, the first equipment receives the check information that the second equipment sends, and wherein, this check information is used for determining the whether success of described data syn-chronization;
Step S104, according to check information, the first equipment at least judges that whether data syn-chronization is successful;
Step S106, when failure of data synchronization, the first equipment carries out data syn-chronization to the second equipment.
Pass through above-mentioned steps, add and carry out according to check information the mechanism that judges, thus the first equipment can be made to judge, and whether data syn-chronization is successful, thus provide possibility for finding that synchrodata is made mistakes, solve the problem that synchrodata between equipment is made mistakes, improve the reliability of data syn-chronization between equipment.
Preferably, the method shown in above-mentioned Fig. 1, in the present embodiment, when the local idle device resource of the first equipment and/or the second equipment exceedes threshold value, can log-on data synchronous method; Or, can after receiving starting command, log-on data synchronous method.Such as, the resource be mainly concerned with in the process of implementation comprises CPU, internal memory, network interface bandwidth and disk I/O, and user can configure the Tidle threshold of this four classes resource, thinks system idles when this four classes resource idleness exceedes this four threshold values.Can require that these four resource equal free time exceed threshold value simultaneously, the single resource free time also can be required to exceed threshold value and just can start said method.Such as, when the cpu resource free time more than 50% time, then can start this data checks mechanism.As another preferred mode, the manual triggering of user or configuration inspection time point can also be provided to start this checking mechanism.
In the present embodiment, between first equipment and the second equipment, checking information can have a variety of, such as, when check information comprises versions of data, according to this check information, first equipment judges whether data syn-chronization successfully comprises: the first equipment judges whether the versions of data from versions of data number and first equipment of the second equipment is number identical, if identical, determines data syn-chronization success, if not identical, then determine failure of data synchronization.
Checking information can also comprise: the School Affairs that the second equipment calculates the part or all of record in the reservation chart in database, according to this check information, the first equipment judges whether described data syn-chronization successfully comprises: in the table corresponding with described reservation chart that the first equipment stores this locality, corresponding record calculates the School Affairs of the first equipment; First equipment judges that whether the School Affairs of the second equipment is identical with the School Affairs of the first equipment, if identical, determine data syn-chronization success, if not identical, then determines failure of data synchronization.
Preferably, these reservation charts can be the whole tables related in this data syn-chronization, also can be some the important tables related in data syn-chronization.
As another preferably embodiment, after failure of data synchronization being detected, can also detect it has been any partial data synchronization failure, then the data of only synchronization failure again.
In the present embodiment, additionally provide a kind of data synchronization unit, this menu processing unit, for realizing above-mentioned method, is described, does not repeat them here in above-described embodiment and preferred implementation.It should be noted that, the title of the module in following apparatus does not form the actual restriction to this module, such as, receiver module can be expressed as " for carry out after data syn-chronization completes to the second equipment at the first equipment, receive the module of the check information that described second equipment sends ", following module all can realize within a processor, such as, receiver module can be expressed as " a kind of processor, for to carry out after data syn-chronization completes to the second equipment at the first equipment, receive the check information that described second equipment sends ", or, " a kind of processor, comprise receiver module " etc.
Fig. 2 is the structure chart of the data synchronization unit according to the embodiment of the present invention, and as shown in Figure 2, this device 20 comprises: receiver module 22, and judge module 24 and synchronization module 26, be described this device below.
Receiver module 22, after data syn-chronization completes, receives the check information that the second equipment sends for carrying out to the second equipment at the first equipment, and wherein, check information is used for determining data syn-chronization whether success; According to check information, judge module 24, at least judging that whether data syn-chronization is successful; Synchronization module 26, for when failure of data synchronization, carries out data syn-chronization to the second equipment.
Preferably, in the present embodiment, data synchronization unit also comprises: start module, for when the first equipment and/or the local idle device resource of the second equipment exceed threshold value, and log-on data synchronizer; Or, for receiving starting command, log-on data synchronizer.
Preferably, device resource comprise following one of at least: processor resource, memory source, bandwidth resources, input and output IO resource.
Preferably, judge module 24 is also for when this check information comprises versions of data, judge whether the versions of data from versions of data number and this first equipment of this second equipment is number identical, if identical, then determine data syn-chronization success, if not identical, then determine failure of data synchronization.
Preferably, when data syn-chronization be database data, this check information comprises: the School Affairs that this second equipment calculates the part or all of record in the reservation chart in database, this judge module also calculates the School Affairs of this first equipment for corresponding record in the table corresponding with this reservation chart that store this locality, judge that whether the School Affairs of this second equipment is identical with the School Affairs of this first equipment, if identical, determine data syn-chronization success, if not identical, then determine failure of data synchronization.
Below in conjunction with preferred embodiment, the present invention will be described.
Fig. 3 is memory database data inspection according to the preferred embodiment of the invention and synchronous structure chart, as shown in Figure 3, comprising: start policy management module 32, data review module 34, Data dissemination module 36, is described modules below.
Start policy management module 32: be responsible for guaranteeing that this checking mechanism starts at system idle time, mainly comprise the configuration of CPU, internal memory, network interface bandwidth and disk I/O Tidle threshold, the statistics of this four classes resources occupation rate, and the execution (achieving the function of above-mentioned startup module) that human task triggers.
Data review module 34: be in charge of registration of tabling look-up to be checked, the School Affairs of tables of data record calculates, School Affairs inspection (achieving the function of above-mentioned judge module 24) between the transmitting-receiving of School Affairs data and active and standby, multimode;
Data dissemination module 36: be responsible for the record of single table to be distributed to appointment receiving terminal, receiving terminal is responsible for receiving data and being updated in memory table, and transmitting terminal is responsible for packing data from table and is sent to receiving terminal (achieving the function of above-mentioned synchronization module 26).
Fig. 4 is data checks according to the preferred embodiment of the invention and synchronous flow chart, and as shown in Figure 4, data receiver Rx end represents, data sending terminal Tx represents, comprises step as follows:
Step S402, when powering on, Tx end and Rx end are registered to verification administration module all tables doing timing verification that needs respectively;
The timing of step S404, Tx end performs and starts tactful judgement, and notifies that Rx end does the judgement starting strategy, when meeting strategy or the manual triggering of user starts, sending out message to Rx end, starting this data checks mechanism;
Step S406, Rx end mails to Tx end the database data version number of the machine;
Step S408, Tx end receives Rx and holds the versions of data number sent, and compares with the versions of data number of the machine, if version number is inconsistent, then trigger data conventional synchronous flow process carries out data syn-chronization, if version number is consistent, then issues the message that Rx end starts to carry out data checks;
The all registered tables of step S410, Tx end traversal, do School Affairs to the record of each table and calculate, and be stored in table record checking data district;
Step S412, Rx end receives Tx and holds the message of carrying out data checks sent, and starts to travel through all registered tables, does School Affairs calculate the record of each table, and table and School Affairs information are mail to Tx end;
Step S414, Tx end receives Rx and holds the School Affairs information sent to compare with table record check field data, checks if unanimously terminate this, if inconsistent, packed one by one by table and mails to Rx end;
Step S416, Rx end receives Tx and holds the table record data and School Affairs information sent, carries out data check, if unanimously, is then updated in memory table, and notifies that Tx end continues the transmission of next table; If inconsistent, notice Tx end retransmits this table;
Notify after step S418, Tx end distributes all inconsistent table records that Rx holds this to check and terminates, terminate this check process.
Fig. 5 is internal memory data base synchronous data verifying function module topology structure chart according to the preferred embodiment of the invention, as shown in Figure 5, starts tactical management and starts this data checks mechanism when system resources sit idle for guaranteeing; Data review module, for checking that whether data sending terminal is consistent with data receiver related data table record internal storage data, for inconsistent data, is distributed by Data dissemination module, is guaranteed the correctness of data.
Fig. 6 is that internal memory data base synchronous data verifies interaction figure according to the preferred embodiment of the invention, as shown in Figure 6, comprises the steps:
Step S602, the table of registration examine, the allocation list that main registration change is little, this kind of table remains unchanged for a long period of time, and not easily finds if there is mistake;
Step S604, when user triggers start-up check mechanism or current system resource meets idle strategy, then starts this checking mechanism;
Step S606, receiving terminal request checking data version number, if version number is inconsistent, illustrates that data there occurs change, triggers conventional synchronous flow process and carries out data syn-chronization; If versions of data number is consistent, then illustrate that current receiving terminal should be consistent with the data of transmitting terminal, now do table record verification;
Step S608, if checking data is consistent, terminates this and checks, if inconsistent, then inconsistent table record is sent to receiving terminal, bring the School Affairs data of this table to verify for receiving terminal when sending table record.
Step S610, receiving terminal receives and records laggard row data check, and verification, not by then notifying that transmitting terminal is retransmitted, verifies by then this record being updated in table internal memory.
This preferred embodiment provides a kind of mechanism utilizing memory block between active and standby and multimode regularly to do School Affairs inspection to guarantee the correctness of data.School Affairs mechanism is utilized to check databases when system resource is more idle: due to memory database in order to quick response data is accessed, all records are all left in internal memory, and these data centralizations leave in a continuous print internal storage data region, the record of each table is also deposit continuously.The record of each table does School Affairs inspection, when between active and standby and multimode, data syn-chronization completes, standby host and other module timed sending School Affairs data are to No. 1 primary side of module, primary side judges that whether the School Affairs of receiving terminal is consistent with the machine table record School Affairs, if inconsistent, trigger data is synchronous to appointment receiving terminal.
This preferred embodiment is the synchronous protection mechanism of a kind of memory database; because have the idle inspection policy of resource and the manual mechanism triggered of user, when do not affect business and Appropriate application system resource ensure that correctness and the reliability of memory database data.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of data synchronization, is characterized in that, comprising:
To carry out after data syn-chronization completes to the second equipment at the first equipment, described first equipment receives the check information that described second equipment sends, and wherein, described check information is used for determining the whether success of described data syn-chronization;
According to described check information, described first equipment at least judges that whether described data syn-chronization is successful;
When described failure of data synchronization, described first equipment carries out data syn-chronization to described second equipment.
2. method according to claim 1, is characterized in that,
When described first equipment and/or the local idle device resource of described second equipment exceed threshold value, start described method of data synchronization; Or,
Receive starting command, start described method of data synchronization.
3. method according to claim 2, is characterized in that, described equipment comprise following one of at least: processor resource, memory source, bandwidth resources, IO resource.
4. according to the method in any one of claims 1 to 3, it is characterized in that,
When described check information comprises versions of data, according to described check information, described first equipment judges whether described data syn-chronization successfully comprises:
Described first equipment judges whether the versions of data from versions of data number and described first equipment of described second equipment is number identical, if identical, then determine data syn-chronization success, if not identical, then determines failure of data synchronization.
5. according to the method in any one of claims 1 to 3, it is characterized in that,
When data syn-chronization be database data, described check information comprises: the School Affairs that described second equipment calculates the part or all of record in the reservation chart in database, according to described check information, described first equipment judges whether described data syn-chronization successfully comprises:
In the table corresponding with described reservation chart that described first equipment stores this locality, corresponding record calculates the School Affairs of described first equipment;
Described first equipment judges that whether the School Affairs of described second equipment is identical with the School Affairs of described first equipment, if identical, determine data syn-chronization success, if not identical, then determines failure of data synchronization.
6. a data synchronization unit, is characterized in that, is arranged in the first equipment, it is characterized in that, comprising:
Receiver module, after data syn-chronization completes, receives the check information that described second equipment sends for carrying out to the second equipment at the first equipment, and wherein, described check information is used for determining the whether success of described data syn-chronization;
According to described check information, judge module, at least judging that whether described data syn-chronization is successful;
Synchronization module, for when described failure of data synchronization, carries out data syn-chronization to described second equipment.
7. device according to claim 6, is characterized in that, also comprises:
Start module, for when described first equipment and/or the local idle device resource of described second equipment exceed threshold value, start described data synchronization unit; Or, for receiving starting command, start described data synchronization unit.
8. device according to claim 7, is characterized in that, described device resource comprise following one of at least: processor resource, memory source, bandwidth resources, input and output IO resource.
9. the device according to any one of claim 6 to 8, is characterized in that,
Described judge module is also for when described check information comprises versions of data, judge whether the versions of data from versions of data number and described first equipment of described second equipment is number identical, if identical, then determine data syn-chronization success, if not identical, then determine failure of data synchronization.
10. the device according to any one of claim 6 to 8, is characterized in that,
When data syn-chronization be database data, described check information comprises: the School Affairs that described second equipment calculates the part or all of record in the reservation chart in database, described judge module also calculates the School Affairs of described first equipment for corresponding record in the table corresponding with described reservation chart that store this locality, judge that whether the School Affairs of described second equipment is identical with the School Affairs of described first equipment, if identical, determining data syn-chronization success, if not identical, then determine failure of data synchronization.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310367360.0A CN104426923A (en) | 2013-08-21 | 2013-08-21 | Data synchronization method and apparatus |
| PCT/CN2014/073628 WO2015024377A1 (en) | 2013-08-21 | 2014-03-18 | Data synchronization method, apparatus and device, and computer storage medium |
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| CN201310367360.0A CN104426923A (en) | 2013-08-21 | 2013-08-21 | Data synchronization method and apparatus |
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| CN112019610A (en) * | 2020-08-21 | 2020-12-01 | 广东德圳智能技术有限公司 | Cloud edge coordination method and system |
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| WO2015024377A1 (en) | 2015-02-26 |
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