CN103810060A - Data backup method and system thereof based on distributed database - Google Patents
Data backup method and system thereof based on distributed database Download PDFInfo
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- CN103810060A CN103810060A CN201310595338.1A CN201310595338A CN103810060A CN 103810060 A CN103810060 A CN 103810060A CN 201310595338 A CN201310595338 A CN 201310595338A CN 103810060 A CN103810060 A CN 103810060A
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Abstract
The invention discloses a data backup method and system thereof based on a distributed database. According to an embodiment of the invention, the data backup method comprises steps as follows: a data backup start time point and a backup stop time point are set; and data between the data backup start time point and the backup stop time point are determined, and the determined data are backed up. According to the data backup method and system thereof based on the distributed database, data can be backed up as required, so that disk read-write resources are saved, and disk space is saved.
Description
Technical field
The present invention relates to database application technical field, especially a kind of data back up method and system thereof based on distributed data base.
Background technology
MongoDB is a kind of database based on distributed document storage, can provide extendible high-performance data storage solution for WEB application.
Mongodb has many merits, is used for important production environment by increasing enterprise.In this case, the backup of data is vital.Mongodb provides data backup function, and groundwork principle is: oplog.rs(Update log in database is recorded to storehouse) in all data integrities export to local file and deposit with json form.
But there is following shortcoming in the data backup scenario of distributed data base of the prior art:
(1) each time backup all need by data integrity derive, cause consuming a large amount of disk read-write resources, and can there are a large amount of repeating datas in complete derivation repeatedly, waste server disk space.
(2) be merely able to data to export as a file, if data volume is larger, by producing a very large file, cause taking larger storage space so.
(3) cannot carry out real-time streams backup, up-to-date data can not get backing up timely, and therefore after disaster, data are difficult to return to good working condition.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of data back up method and system thereof based on distributed data base, causes consuming the technical matters of a large amount of disk read-write resources and waste disk space to solve the complete data backup of the distributed data base existing in prior art.
For addressing the above problem, a kind of data back up method is provided according to an aspect of the present invention, comprising: data backup start time point and backup stand-by time point are set; Data between specified data backup start time point and backup stand-by time point, and established data is backed up.
Wherein, the described step that established data is backed up comprises: backup file size threshold value is set; Established data is directed into multiple backup files in order, and wherein, each backup file size is not more than described backup file size threshold value.
Wherein, described method also comprises: monitor the Update log file of described distributed data base, judge whether described Update log file is written into information; If data corresponding to writing information are carried out to data backup.
Wherein, described method also comprises: rise time stamp tab file, the temporal information that described Update log file is written into information is recorded to described timestamp tab file.
Wherein, described method also comprises: in the time restarting to carry out data backup, determine that the time location of last termination is proceeded data backup according to described timestamp tab file.
A kind of data backup system is provided according to another aspect of the present invention, comprises: module is set, for data backup start time point and backup stand-by time point are set; Data backup module, for the data between specified data backup start time point and backup stand-by time point, and backs up established data.
Wherein, described data backup module comprises: threshold value setting module, for backup file size threshold value is set; Data importing module, for established data is directed into multiple backup files in order, wherein, each backup file size is not more than described backup file size threshold value.
Wherein, described system also comprises: monitoring module, for monitoring the Update log file of described distributed data base; Judge module, for judging whether described Update log file is written into information, if described data backup module is carried out data backup to data corresponding to writing information.
Wherein, described system also comprises: generation module, for rise time stamp tab file; Time logging modle, is recorded to described timestamp tab file for the temporal information that described Update log file is written into information.
Wherein, in the time that described data backup module restarts to carry out data backup, determine that according to described timestamp tab file the time location of last termination is proceeded data backup.
According to technical scheme of the present invention, by data backup start time point and backup stand-by time point are set, and data between BACKUP TIME terminal, can realize and carry out as required data backup, thereby save disk read-write resource, and save disk space.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by the specific embodiment of the present invention.
Accompanying drawing explanation
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the object of preferred implementation is shown, and do not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is the process flow diagram of data back up method according to an embodiment of the invention;
Fig. 2 is the process flow diagram of data back up method according to another embodiment of the present invention;
Fig. 3 is according to the process flow diagram of the real-time streams backup method of the embodiment of the present invention;
Fig. 4 is the structured flowchart of data backup system according to an embodiment of the invention;
Fig. 5 is the structured flowchart of data backup system according to another embodiment of the present invention;
Fig. 6 is the structured flowchart of data backup system according to yet another embodiment of the invention.
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in accompanying drawing, but should be appreciated that and can realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order more thoroughly to understand the disclosure that these embodiment are provided, and can be by the those skilled in the art that conveys to complete the scope of the present disclosure.
The present invention is for distributed data base, for example, for Mongodb database.With reference to figure 1, Fig. 1 is that described method comprises according to the process flow diagram of the data back up method based on distributed data base of the embodiment of the present invention:
Step S102, arranges data backup start time point and backup stand-by time point.
The data of storing in database have time word segment information (being entry time), can view the entry time of data by the configuration file of database.Just can determine the position of the data of backup beginning by the data backup start time point arranging, just can determine the position of backing up the data that stop by data backup stand-by time point is set.Wherein, above-mentioned time point comprises this moment.
Step S104, the data between specified data backup start time point and backup stand-by time point, and established data is backed up.
By data to be backed up in the beginning and ending time point specified data storehouse arranging, thereby established data is backed up.By above-described embodiment, can need according to user the beginning and ending time of specific data backup, carry out as required the backup of partial data, and without all carry out full backup at every turn, thereby save disk read-write resource, and save disk space.
In actual applications, if need the data of backup less, in the time carrying out data backup, can directly established data be directed in a backup file, and can be to operations such as this backup file remove.But, if need the data of backup larger, in the time being directed in a backup file, before completing, backup can not move and the operation such as deletion this backup file, therefore can take larger disk space, cause not having space storage data.
In one embodiment of the invention, the data of need backup can be directed into local multiple backup files in order.First the size threshold value (for example 1G) that needs to arrange in this case backup file, this threshold value represents the cutting size of backup file.For example, by in the data importing backup file oplog_backup.1 in database, in the time that oplog_backup.1 file reaches 1G, regenerate a new backup file oplog_backup.2, switch to oplog_backup.2 file and proceed backup, by that analogy, until data full backup is complete.According to above-described embodiment, after backup file switches, old file will no longer do any change, user now can by old backup file compressed storage in other storeies to discharge local backup space, guaranteed that local backup space has enough spaces that writes all the time.
Describe the details of above-mentioned processing in detail below in conjunction with Fig. 2.Fig. 2 is the process flow diagram of data back up method according to an embodiment of the invention, and described method comprises step:
Step S202, after data backup starts, first needs to determine data to be backed up.Judge whether to be provided with start-stop BACKUP TIME point, if be provided with start-stop BACKUP TIME point, perform step S204, otherwise execution step S206.
Step S204, according to the backup mode of the start-stop BACKUP TIME point operating part data that arrange.For example, in database, find the start-stop BACKUP TIME point of setting by time (time) field, determine that the data between start-stop BACKUP TIME point (containing the terminal moment) are data to be backed up.
Step S206, complete data backup mode, determines to be data to be backed up by the total data in database.
Step S208, generates backup file, for example: oplog_backup.1 in this locality.By this backup file of the data importing to be backed up oplog_backup.1 determining.
Step S210, judges that whether current backup file oplog_backup.1 is greater than default backup file cutting size, if it is performs step S212, otherwise directly performs step S214.Described backup file cutting size, the size that namely backup file must not exceed.Reach after this size at current backup file, current backup file need stop writing, and should switch to another backup file and proceed data backup.
Need explanation, backup file cutting size can arrange according to actual conditions such as local storage space size and file sizes to be backed up, for example: 1G, 2G, 5G or other value, the present invention does not limit.
Step S212, backup file oplog_backup.1 reaches the cutting size of setting, and this file oplog_backup.1 is no longer continued to write.Generate new backup file oplog_backup.2 in this locality, switch to new backup file oplog_backup.2 and proceed data importing.
After backup file switches, old file (oplog_backup.1) no longer does any change, can will after old backup file (oplog_backup.1) compression, be stored in other storer to discharge local storage space.
Step S214, judges whether data backup completes, if do not completed, proceeds data backup, and data are sequentially imported to backup file oplog_backup.n, and makes the size of file oplog_backup.n be no more than the size of cutting size.
If data backup completes, this flow process finishes.
By current need Backup Data backup complete after, for example, if the data in database are upgraded (writing or retouching operation), the data of renewal need to be carried out to back-up processing in real time, the namely backup of real-time streams, so that the data in Backup Data and database are consistent to the full extent.
Describe the back-up processing process of real-time streaming data in detail below in conjunction with Fig. 3.In database, the various operations of Update log file (oplog file) database of record, when one write behavior (comprise add and retouching operation) and successfully occur after, can be by complete the behavior oplog file that deposits in.By real-time monitoring oplog file, detect the behavior that writes that oplog file occurs, can judge that renewal has occurred the data in database.When finding that new write operation occurs oplog file, so can read data corresponding this write operation and export to local backup file in real time.
With reference to figure 3, comprise the following steps according to the real-time streams backup method of the embodiment of the present invention:
Whether step S302-S304, monitors Update log file (oplog file) in real time, detect it and write, and if it is performs step S308, otherwise continues execution step S302.
Step S306, detects that oplog file exists new writing information, reads in real time the data that this writing information is corresponding and is directed into local backup file, thereby completing the back-up processing operation of real-time streams.
By the writing information of oplog file, in database, determine the data after corresponding renewal, and established data is backed up to backup file.Concrete data back up method can, with reference to the step S208 to S214 shown in figure 2, repeat no more herein.
Step S308, when step S306 carries out, generates a timestamp tab file (time.tmp), has recorded the timestamp of the data that the last item writing information of finding in each monitoring is corresponding in this file.
Step S310, in the time restarting data backup because of a variety of causes, by the record in timestamp tab file (time.tmp), the time while finding last backup to stop, and then time location when last termination is proceeded data backup, to guarantee the integrality of data.
With reference to figure 4, be the structured flowchart of data backup system according to an embodiment of the invention, as shown in the figure, this system at least comprises: module 410 and data backup module 420 are set.
Further, described data backup module 420 comprises:
Threshold value setting module 422, for arranging backup file size threshold value.
With reference to figure 5, be the structured flowchart of data backup system according to another embodiment of the present invention, as shown in the figure, this system comprises: monitoring module 510, judge module 520 and data backup module 530.
With reference to figure 6, be the structured flowchart of data backup system according to yet another embodiment of the invention, as shown in the figure, this system also comprises: generation module 610, time logging modle 620 and data backup module 630.
The operation steps of method of the present invention is corresponding with the architectural feature of system, can cross-reference, repeat no longer one by one.
In sum, according to technical scheme of the present invention, by data backup start time point and backup stand-by time point are set, and data between BACKUP TIME terminal, can realize and carry out as required data backup, thereby save disk read-write resource, and save disk space.
The algorithm providing at this is intrinsic not relevant to any certain computer, virtual system or miscellaneous equipment with demonstration.Various general-purpose systems also can with based on using together with this teaching.According to description above, it is apparent constructing the desired structure of this type systematic.In addition, the present invention is not also for any certain programmed language.It should be understood that and can utilize various programming languages to realize content of the present invention described here, and the description of above language-specific being done is in order to disclose preferred forms of the present invention.
In the instructions that provided herein, a large amount of details are described.But, can understand, embodiments of the invention can be put into practice in the situation that there is no these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand one or more in each inventive aspect, in the above in the description of exemplary embodiment of the present invention, each feature of the present invention is grouped together into single embodiment, figure or sometimes in its description.But, the method for the disclosure should be construed to the following intention of reflection: the present invention for required protection requires than the more feature of feature of clearly recording in each claim.Or rather, as reflected in claims below, inventive aspect is to be less than all features of disclosed single embodiment above.Therefore, claims of following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are appreciated that and can the module in the equipment in embodiment are adaptively changed and they are arranged in one or more equipment different from this embodiment.Module in embodiment or unit or assembly can be combined into a module or unit or assembly, and can put them in addition multiple submodules or subelement or sub-component.At least some in such feature and/or process or unit are mutually repelling, and can adopt any combination to combine all processes or the unit of disclosed all features in this instructions (comprising claim, summary and the accompanying drawing followed) and disclosed any method like this or equipment.Unless clearly statement in addition, in this instructions (comprising claim, summary and the accompanying drawing followed) disclosed each feature can be by providing identical, be equal to or the alternative features of similar object replaces.
In addition, those skilled in the art can understand, although embodiment more described herein comprise some feature rather than further feature included in other embodiment, the combination of the feature of different embodiment means within scope of the present invention and forms different embodiment.For example, in the following claims, the one of any of embodiment required for protection can be used with array mode arbitrarily.
All parts embodiment of the present invention can realize with hardware, or realizes with the software module of moving on one or more processor, or realizes with their combination.It will be understood by those of skill in the art that and can use in practice microprocessor or digital signal processor (DSP) to realize the some or all functions according to the some or all parts in the data backup system of the embodiment of the present invention.The present invention can also be embodied as part or all equipment or the device program (for example, computer program and computer program) for carrying out method as described herein.Realizing program of the present invention and can be stored on computer-readable medium like this, or can there is the form of one or more signal.Such signal can be downloaded and obtain from internet website, or provides on carrier signal, or provides with any other form.
It should be noted above-described embodiment the present invention will be described rather than limit the invention, and those skilled in the art can design alternative embodiment in the case of not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed as element or step in the claims.Being positioned at word " " before element or " one " does not get rid of and has multiple such elements.The present invention can be by means of including the hardware of some different elements and realizing by means of the computing machine of suitably programming.In the unit claim of having enumerated some devices, several in these devices can be to carry out imbody by same hardware branch.The use of word first, second and C grade does not represent any order.Can be title by these word explanations.
Claims (10)
1. the data back up method based on distributed data base, it comprises:
Data backup start time point and backup stand-by time point are set;
Data between specified data backup start time point and backup stand-by time point, and established data is backed up.
2. method according to claim 1, wherein, the described step that established data is backed up comprises:
Backup file size threshold value is set;
Established data is directed into multiple backup files in order, and wherein, each backup file size is not more than described backup file size threshold value.
3. method according to claim 1 and 2, also comprises:
Monitor the Update log file of described distributed data base, judge whether described Update log file is written into information;
If data corresponding to writing information are carried out to data backup.
4. method according to claim 3, also comprises:
Rise time stamp tab file, the temporal information that described Update log file is written into information is recorded to described timestamp tab file.
5. method according to claim 4, also comprises:
In the time restarting to carry out data backup, determine that according to described timestamp tab file the time location of last termination is proceeded data backup.
6. the data backup system based on distributed data base, comprising:
Module is set, for data backup start time point and backup stand-by time point are set;
Data backup module, for the data between specified data backup start time point and backup stand-by time point, and backs up established data.
7. system according to claim 6, wherein, described data backup module comprises:
Threshold value setting module, for arranging backup file size threshold value;
Data importing module, for established data is directed into multiple backup files in order, wherein, each backup file size is not more than described backup file size threshold value.
8. according to the system described in claim 6 or 7, also comprise:
Monitoring module, for monitoring the Update log file of described distributed data base;
Judge module, for judging whether described Update log file is written into information, if described data backup module is carried out data backup to data corresponding to writing information.
9. system according to claim 8, also comprises:
Generation module, for rise time stamp tab file;
Time logging modle, is recorded to described timestamp tab file for the temporal information that described Update log file is written into information.
10. system according to claim 9, in the time that described data backup module restarts to carry out data backup, determines that according to described timestamp tab file the time location of last termination is proceeded data backup.
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| CN107844386A (en) * | 2016-09-19 | 2018-03-27 | 北京金山云网络技术有限公司 | A kind of data backup, restoration methods and device |
| CN110019363A (en) * | 2017-12-11 | 2019-07-16 | 北京京东尚科信息技术有限公司 | A kind of method and apparatus verifying data |
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| CN109558270B (en) * | 2017-09-25 | 2021-02-05 | 北京国双科技有限公司 | Data backup method and device and data restoration method and device |
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Application publication date: 20140521 |