CN103138912A - Data synchronizing method and data synchronizing system - Google Patents
Data synchronizing method and data synchronizing system Download PDFInfo
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- CN103138912A CN103138912A CN2011103998976A CN201110399897A CN103138912A CN 103138912 A CN103138912 A CN 103138912A CN 2011103998976 A CN2011103998976 A CN 2011103998976A CN 201110399897 A CN201110399897 A CN 201110399897A CN 103138912 A CN103138912 A CN 103138912A
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Abstract
The invention provides a data synchronizing method and a data synchronizing system. The data synchronizing method comprises the steps that an auxiliary station acquires updated data information of a master station and utilizes the updated data information to synchronize data of a storage layer of the auxiliary station; and then data in a buffer memory layer of the auxiliary station is synchronized according to data synchronizing information of the storage layer of the auxiliary station. According to the data synchronizing method and the data synchronizing system, reliability of data in an auxiliary computer room is guaranteed, and generation of dirty data is avoided.
Description
Technical field
The application relates to networking technology area, particularly relates to a kind of method of data synchronization across machine room and system.
Background technology
Disaster tolerance system refers to, sets up two covers in strange land relatively far apart or overlaps the identical IT system of function more, can carry out state of health monitoring between mutually and function is switched.Because of unexpected (as fire, earthquake etc.) when quitting work, whole application system can switch to another place, makes this systemic-function can continue normal operation when a place system.Disaster tolerance technology is a part of the High availability of system, and disaster tolerance system emphasizes to process external environment more on the impact of system, the particularly catastrophic event impact on whole IT node, provides node level other system's restore funcitons.
A kind of existing disaster tolerance system comprises main equipment room part and standby host room part as shown in Figure 1, both includes application server, cache layer (buffering cluster) and accumulation layer (memory device).As the backup of main equipment room, when main equipment room quits work because of accident, enable the standby host room and work on.In the current disaster tolerance system scheme across machine room, adopt cache layer to isolate with accumulation layer and synchronize, namely the cache layer in standby host room is synchronizeed with the cache layer of main equipment room, and the accumulation layer in standby host room is synchronizeed with the accumulation layer of main equipment room, as shown in Figure 1.But because caching system and storage system are heterogeneous system, the caching system storage speed is fast, and data block is little, and its synchronous efficiency is far above data persistence layer, and cache layer is synchronously synchronizeed with accumulation layer and all had failed possibility.Therefore, cache layer and accumulation layer adopt the privately owned separately method of synchronization, will inevitably cause the data can't the coordinating and unifying, cause the cache layer data synchronously can't be consistent with accumulation layer data synchronization, produce dirty data.
In this case, in the current disaster tolerance system scheme across machine room, if main equipment room generation disaster, all services of standby host room carrying, when the user accesses the standby host room, very might get dirty data, thereby can't guarantee hundred-percent data reliability, cause data display mistake or mistake in computation etc., greatly reduced user's experience and data reliability.
Summary of the invention
The application's technical problem to be solved is to provide a kind of method of data synchronization across machine room and system, and to solve when synchronous across the active and standby disaster tolerance system data of machine room, data reliability is hanged down and the not high problem of user's experience.
In order to address the above problem, the application discloses a kind of method of data synchronization, comprising: standby station obtains the renewal data message of main website, uses the data of the synchronous described standby accumulation layer of standing of described renewal data message; According to the data synchronization information of described standby accumulation layer of standing, the data of the cache layer at synchronous described standby station.
Preferably, the data synchronization information of the accumulation layer at the standby station of described basis, the step of the data of the cache layer at synchronous described standby station comprises: described standby application layer of standing is obtained the data synchronization information of the accumulation layer at described standby station, according to the data of the synchronous described standby cache layer of standing of described data synchronization information.
Preferably, the step that described standby station obtains the renewal data message of main website comprises: the first Update log that described standby accumulation layer of standing by obtaining described main website more generates after new data, obtain the renewal data message of described main website.
Preferably, described data synchronization information is after described accumulation layer for the station is used the data of the synchronous described standby accumulation layer of standing of described renewal data message, the second Update log of generation; The step that the application layer at described standby station is obtained the data synchronization information of described standby accumulation layer of standing comprises: the application layer at described standby station is obtained the data synchronization information of the accumulation layer at described standby station by obtaining described the second Update log.
Preferably, described data synchronization information is the described renewal data message that described standby station obtains; The step that the application layer at described standby station is obtained the data synchronization information of described standby accumulation layer of standing comprises: the application layer at described standby station is obtained described renewal data message.
Preferably, the application layer at described standby station comprises according to the step of the data of the synchronous described standby cache layer of standing of described data synchronization information: the application layer at described standby station is according to described data synchronization information, upgrade and store in the cache layer at described standby station, the data of described data synchronization information indication; Perhaps, the application layer at described standby station is deleted the data of the described data synchronization information indication of storing in the cache layer at described standby station according to described data synchronization information.
Preferably, after the application layer at described standby station is obtained the data synchronization information of described standby accumulation layer of standing, before data according to the synchronous described standby cache layer of standing of described data synchronization information, also comprise: the application layer at described standby station is processed current application according to described data synchronization information.
Preferably, obtain the step of renewal data message of main website at described standby station before, also comprise: the accumulation layer of described main website more new data generate the first Update log as described renewal data message, trigger the data at described standby station synchronous the time, the cache layer of described main website obtains described the first Update log, upgrades or deletes corresponding data in the cache layer of described main website.
In order to address the above problem, disclosed herein as well is a kind of data synchronous system, comprise main website and standby station, described standby station comprises: the first synchronization module, be used for obtaining the renewal data message of described main website, use the data of the synchronous described standby accumulation layer of standing of described renewal data message; The second synchronization module is used for the data synchronization information according to the accumulation layer at described standby station, the data of the cache layer at synchronous described standby station.
Preferably, described the second synchronization module is used for making described standby application layer of standing to obtain the data synchronization information of the accumulation layer at described standby station, according to the data of the synchronous described standby cache layer of standing of described data synchronization information.
Compared with prior art, the application has the following advantages:
After standby station gets the more new data of main website, at first use this more data of the synchronous standby station of new data accumulation layer, afterwards, then the data of synchronous standby station cache layer.Oppositely upgrade the cache layer principle by this accumulation layer, carry out buffer memory synchronous.And do not do synchronous between the cache layer between active and standby station, thereby realized the data consistent between active and standby station storage system (accumulation layer), and the data consistent of storage system and caching system, solved in prior art, when synchronous across the active and standby disaster tolerance system data of machine room, data reliability is hanged down and the not high problem of user's experience, has guaranteed the data reliability in standby host room, the generation of having stopped dirty data.
Description of drawings
Fig. 1 is schematic diagram synchronous according to the data of a kind of disaster tolerance system of prior art;
Fig. 2 is the flow chart of steps according to a kind of method of data synchronization of the embodiment of the present application one;
Fig. 3 is the flow chart of steps according to a kind of method of data synchronization of the embodiment of the present application two;
Fig. 4 is the synchronous schematic diagram of a kind of data according to the embodiment of the present application three;
Fig. 5 is the structured flowchart according to a kind of data synchronous system of the embodiment of the present application four.
Embodiment
For above-mentioned purpose, the feature and advantage that make the application can become apparent more, below in conjunction with the drawings and specific embodiments, the application is described in further detail.
Embodiment one
With reference to Fig. 2, it shows the flow chart of steps according to a kind of method of data synchronization of the embodiment of the present application one.
The method of data synchronization of the present embodiment comprises the following steps:
Step S102: standby station obtains the more new data of main website, uses the data of the synchronous standby accumulation layer of standing of described more new data.
In the present embodiment, can after having upgraded data, main website trigger the synchronous task between active and standby station, and synchronous with the data of carrying out between active and standby station.Standby stand in the more new data that has obtained main website after, use the corresponding data in the accumulation layer at the standby station of this renewals Data Update, with synchronizeing between realization and main website.
Step S104: standby station is according to the data synchronization information of the accumulation layer at standby station, the data of the cache layer at synchronous standby station.
In this step, carried out after data synchronize in accumulation layer and the main website at standby station, standby station obtains the data synchronization information with this sync correlation, and uses this data synchronization information synchronously for data accordingly in the cache layer of standing.
Wherein, data synchronization information can be the Update log update_log of standby station accumulation layer, can be also new data itself more.Certainly, also can be for representing arbitrarily the information of standby station accumulation layer Data Update.
Preferably, carry out above-mentioned data when synchronous, guaranteeing the synchrodata order.The assurance of synchrodata order can be arranged according to actual needs flexibly by those skilled in the art, and as passing through queue system, this mode realizes simply, saves and realizes cost.
By the present embodiment, after standby station gets the more new data of main website, at first, use this more data of the synchronous standby station of new data accumulation layer, afterwards, then the data of synchronous standby station cache layer.Oppositely upgrade the cache layer principle by this accumulation layer, carry out buffer memory synchronous.And do not do synchronous between the cache layer between active and standby station, thereby realized the data consistent between active and standby station storage system (accumulation layer), and the data consistent of storage system and caching system, solved in prior art, when synchronous across the active and standby disaster tolerance system data of machine room, data reliability is hanged down and the not high problem of user's experience, has guaranteed the data reliability in standby host room, the generation of having stopped dirty data.
Embodiment two
With reference to Fig. 3, it shows the flow chart of steps according to a kind of method of data synchronization of the embodiment of the present application two.
The method of data synchronization of the present embodiment comprises the following steps:
Step S202: the accumulation layer of main website is new data more, generates the first Update log (the Data Update record of main website accumulation layer).
Wherein, recorded the more information of new data of main website accumulation layer in the first Update log.
Step S204: main website triggers standby station, and to carry out data synchronous, to standby station transmission the first Update log.
Preferably, main website trigger standby station carry out data synchronous in, the cache layer of main website can obtain the first Update log, upgrades or deletes corresponding data in the cache layer of main website.
May be cached with the data that the accumulation layer of main website is upgraded in the cache layer of main website (or buffering cluster, or buffering area), in this case, after the cache layer of main website gets the first Update log, can synchronously upgrade this part data of buffer memory, perhaps, directly with this part data deletion.
Main website sends the first Update log to standby station, triggers active and standby station data synchronous.Certainly, main website also can be directly sends to standby station with new data more, carries out data synchronous.The Data Update information of using the first Update log to carry main website can make standby station determine quickly and easily the Data Update situation of main website, in order to exactly the data at standby station are carried out synchronously, and amount of information is little, the transmission is convenient and swift.
Step S206: standby station obtains the first Update log, uses the data of the synchronous standby accumulation layer of standing of the first Update log.
In this step, standby station obtains the first Update log that main website sends, and upgrades according to the corresponding data of the first Update log to the accumulation layer at standby station.
New data more if main website sends, standby stand erectly to connect use these data that standby station accumulation layer corresponding data is upgraded.
Step S208: standby station accumulation layer carry out data synchronous after, generate the second Update log (the Data Update record of standby station accumulation layer).
Wherein, the accumulation layer that has recorded standby station in the second Update log is the information of new data more.Use the second Update log to carry the Data Update information of standby station accumulation layer, can make standby station application layer determine quickly and easily the Data Update situation of accumulation layer, in order to exactly the data of cache layer are carried out synchronously.
Step S210: standby station application layer is obtained the second Update log, standby station synchronous according to the second Update log cache layer data.
In this step, standby station application layer,, is upgraded or deletes for the corresponding data in the cache layer of station as according to the second Update log carrying out synchronously for corresponding data in the cache layer of station according to the standby more information of new data of accumulation layer of standing that records in the second Update log.Certainly, standby station application layer is obtained the second Update log and cache layer is carried out synchronously only being preferred version, it should be understood by those skilled in the art that can obtain arbitrarily the second Update log and cache layer is carried out synchronous functional module or entity all can be realized this step.Carry out this operation by standby station application layer, improved data-handling capacity and the efficient of system.Here, adopt application layer to operate, mainly consider some data cached be by the accumulation layer data transaction.In database, such data a=2 is arranged, b=3, application need to know that the value of a * b gets final product, and that cache layer namely only needs to store 6, i.e. and a * b result is used the application layer synchrodata of the present embodiment, needn't repeat to realize this service logic.And adopt other modes, need to repeat to realize this service logic.
Preferably, the renewal data message that standby station application layer also can directly be obtained according to standby station, directly synchronous to carry out data for the station cache layer.Directly use and upgrade data message, saved the Information generation cost, improved data synchronization efficiency.
Preferably, standby station application layer can first be processed current application after getting the second Update log or upgrading data message, as upgrading data that the needs that exist in current application upgrade etc.Then, then according to the second Update log or renewal data message, the data of synchronous standby station cache layer.Standby station application layer is first processed current application, need not follow-uply require data to cache layer or accumulation layer again, has saved information interactive process, has improved the system data treatment effeciency.
By the present embodiment, data cached synchronously oppositely upgrades realization by accumulation layer, has further realized thus the data consistent between the accumulation layer of active and standby station, and the data consistent of accumulation layer and cache layer, reached and stopped dirty data, guaranteed data reliability, promoted the purpose that the user experiences.
Embodiment three
With reference to Fig. 4, it shows the synchronous schematic diagram of a kind of data according to the embodiment of the present application three.In the present embodiment, the main website machine room provides Data Update and reads service, and standby station machine room only provides the service of reading.The nearest website reading out data of user priority access.
The method of data synchronization of the present embodiment mainly comprises the following steps:
Step S302: the standby station monitored by the update_log (the first Update log) to the main website accumulation layer, obtains more new data, and more new data writes to standby accumulation layer (storage system) of standing.
Step S304: standby station accumulation layer more when new data, produces the update_log (the second Update log) at standby station, and the update_log by standby station gets the renewal entry, is sent to the application (application layer) at standby station.
Step S306: the application at standby station gets update notification, and deal with data (optional, as to decide according to concrete business demand) is upgraded cache layer (caching system).
Below illustrate the process of user's access application from reading and upgrading two aspects respectively, the method for data synchronization of using the present embodiment carries out the synchronous process of data.
(1) user's access application reads main website or standby station data.
Particularly, comprising:
Steps A: user's access application, trigger the event that reads.
Step B: use and at first to check cache cluster, if cache hit (namely finding in cache cluster), directly return results and deal with data is returned to the user; If do not hit in cache cluster, use and read accumulation layer, Query Result, deal with data (optional, as to decide according to concrete Business Processing) writes the data that find in cache cluster simultaneously, at last data result is returned to the user.
(2) user's access application is upgraded the main website data, triggers active and standby station data synchronous.
Wherein, upgrade and to comprise modification, write, the operation such as deletion.
Particularly, comprising:
Step C: the user accesses master station application, triggers update event.
Step D: to the main website accumulation layer, the main website accumulation layer more produces the update_log of main website daily record after new data with Data Update in main website, triggers the main website synchronizer and carries out synchronous task; Simultaneously, use and delete corresponding entry in the main website buffer memory, and result is returned.
Step e: standby station accumulation layer synchronizer (replicate) obtains the change data by the update_log of main website, and change is write standby station accumulation layer.
Step F: standby station accumulation layer is received updating message, and more new data, also produce standby station update_log simultaneously, triggers standby station synchronizer.
Step G: standby station synchronizer more new data notification to standby station is used, and standby station is used and got the Data Update entry, and deal with data (optional) is upgraded the data in buffer memory.
Whether as optional step, main cause is in practical operation with deal with data, need according to concrete service needed, then need to determine to put into buffer memory after processing is processed to data again.
By the present embodiment, data cached synchronously oppositely upgrades realization by accumulation layer, has reached data cached and has been consistent with the accumulation layer data, stops the purpose of dirty data.
Embodiment four
With reference to Fig. 5, it shows the structured flowchart according to a kind of data synchronous system of the embodiment of the present application four.
The data synchronous system of the present embodiment comprises main website 402 and standby station 404.Wherein, standby station 404 comprises: the first synchronization module 4042, for the renewal data message that obtains main website 402, use the synchronously data of the accumulation layer at standby station 404 of described renewal data message; The second synchronization module 4044 is used for the data synchronization information according to the accumulation layer at standby station 404, the data of the cache layer at synchronous standby station 404.
Preferably, the second synchronization module 4044 is used for making the application layer at standby station 404 to obtain the data synchronization information of the accumulation layer at standby station 404, according to the data of the cache layer at data synchronization information synchronous standby station 404.
Preferably, the first Update log that the accumulation layer of the first synchronization module 4042 by obtaining main website 402 more generates after new data obtains the renewal data message of main website 402, uses the data of the accumulation layer at described renewal data message synchronous standby station 404.
Preferably, data synchronization information is after the accumulation layer at standby station 404 is used the data of the accumulation layer of upgrading data message synchronous standby station 404, the second Update log of generation; The second synchronization module 4044 obtains the data synchronization information of the accumulation layer at standby station 404 by obtaining the second Update log, according to this data synchronization information, and the data of the cache layer at synchronous standby station 404.
Preferably, data synchronization information is obtained for standby station 404, the renewal data message that main website sends; The second synchronization module 4044 obtains this renewal data message, upgrades data message according to this, the data of the cache layer at synchronous standby station 404.
Preferably, the second synchronization module 4044 is stored in the cache layer of renewal for station 404 according to data synchronization information, the data of data synchronization information indication; Perhaps, according to data synchronization information, store the data of data synchronization information indication in the cache layer of deletion for station 404.
Preferably, the standby station 404 of the present embodiment also comprises: application processing module 4046, after data synchronization information for the accumulation layer of obtaining standby station 404 at the second synchronization module 4044, before the data of the cache layer at station 404 synchronous standby according to described data synchronization information, according to described data synchronization information, current application is processed.
Preferably, main website 402 the accumulation layer of main website 402 more new data generate the first Update log as upgrading data message, trigger the data at standby station 404 synchronous the time, the cache layer of main website 402 obtains the first Update log, upgrade or the cache layer of deletion main website 402 in corresponding data.
The data synchronous system of the present embodiment is monitored by the update_log to the main website accumulation layer, obtains more new data, and renewal is write to standby station storage system; Standby station storage system produces update_log in new data more, standby station update_log gets the renewal entry, is sent to application; Application gets update notification, and deal with data is upgraded caching system.
The data synchronous system of the present embodiment is realized the method for data synchronization in aforementioned a plurality of embodiment of the method, and has the beneficial effect of preceding method embodiment, does not repeat them here.
The data synchronization technology scheme that the application provides, oppositely upgrade buffer memory principle by accumulation layer, carry out buffer memory synchronous, and do not do synchronous between the caching system of active and standby station, not only solved the data consistent problem between the storage system of active and standby station, also solve the problem of data consistent between caching system and storage system, guaranteed the data reliability of standby station machine room, stopped the generation of dirty data.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For system embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part gets final product referring to the part explanation of embodiment of the method.
Above a kind of method of data synchronization and the device that the application is provided, be described in detail, used specific case herein the application's principle and execution mode are set forth, the explanation of above embodiment just is used for helping to understand the application's method and core concept thereof; Simultaneously, for one of ordinary skill in the art, the thought according to the application all will change in specific embodiments and applications, and in sum, this description should not be construed as the restriction to the application.
Claims (10)
1. a method of data synchronization, is characterized in that, comprising:
Standby station obtains the renewal data message of main website, uses the data of the synchronous described standby accumulation layer of standing of described renewal data message;
According to the data synchronization information of described standby accumulation layer of standing, the data of the cache layer at synchronous described standby station.
2. method according to claim 1, is characterized in that, the data synchronization information of the standby accumulation layer of standing of described basis, and the step of the data of the cache layer at synchronous described standby station comprises:
Described standby application layer of standing is obtained the data synchronization information of the accumulation layer at described standby station, according to the data of the synchronous described standby cache layer of standing of described data synchronization information.
3. method according to claim 1 and 2, is characterized in that, the step that described standby station obtains the renewal data message of main website comprises:
The first Update log that the accumulation layer of described standby station by obtaining described main website more generates after new data obtains the renewal data message of described main website.
4. method according to claim 2, is characterized in that, described data synchronization information is after described accumulation layer for the station is used the data of the synchronous described standby accumulation layer of standing of described renewal data message, the second Update log of generation;
The step that the application layer at described standby station is obtained the data synchronization information of described standby accumulation layer of standing comprises: the application layer at described standby station is obtained the data synchronization information of the accumulation layer at described standby station by obtaining described the second Update log.
5. method according to claim 2, is characterized in that, described data synchronization information is the described renewal data message that described standby station obtains;
The step that the application layer at described standby station is obtained the data synchronization information of described standby accumulation layer of standing comprises: the application layer at described standby station is obtained described renewal data message.
6. method according to claim 2, is characterized in that, the application layer at described standby station comprises according to the step of the data of the synchronous described standby cache layer of standing of described data synchronization information:
The application layer at described standby station is according to described data synchronization information, upgrades to store in the cache layer at described standby station the data that described data synchronization information is indicated; Perhaps, the application layer at described standby station is deleted the data of the described data synchronization information indication of storing in the cache layer at described standby station according to described data synchronization information.
7. method according to claim 2, is characterized in that, after described standby application layer of standing is obtained the data synchronization information of described standby accumulation layer of standing, before the data according to the synchronous described standby cache layer of standing of described data synchronization information, also comprises:
The application layer at described standby station is processed current application according to described data synchronization information.
8. method according to claim 1, is characterized in that, obtain the step of renewal data message of main website at described standby station before, also comprises:
The accumulation layer of described main website more new data generate the first Update log as described renewal data message, trigger the data at described standby station synchronous the time, the cache layer of described main website obtains described the first Update log, upgrades or deletes corresponding data in the cache layer of described main website.
9. a data synchronous system, comprise main website and standby station, it is characterized in that, described standby station comprises:
The first synchronization module for the renewal data message that obtains described main website, uses the data of the synchronous described standby accumulation layer of standing of described renewal data message;
The second synchronization module is used for the data synchronization information according to the accumulation layer at described standby station, the data of the cache layer at synchronous described standby station.
10. system according to claim 9, it is characterized in that, described the second synchronization module is used for making described standby application layer of standing to obtain the data synchronization information of the accumulation layer at described standby station, according to the data of the synchronous described standby cache layer of standing of described data synchronization information.
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| CN201110399897.6A CN103138912B (en) | 2011-12-05 | 2011-12-05 | Method of data synchronization and system |
| HK13108817.9A HK1181580A1 (en) | 2011-12-05 | 2013-07-29 | Data synchronization method and system |
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| CN201110399897.6A CN103138912B (en) | 2011-12-05 | 2011-12-05 | Method of data synchronization and system |
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| CN104967536A (en) * | 2015-06-29 | 2015-10-07 | 北京奇虎科技有限公司 | Method and device for realizing data consistency of multiple machine rooms |
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| CN105511808A (en) * | 2015-12-01 | 2016-04-20 | 腾讯科技（深圳）有限公司 | Data operation method, system and related device |
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| CN109284066A (en) * | 2017-07-19 | 2019-01-29 | 阿里巴巴集团控股有限公司 | A kind of data processing method, device, equipment and system |
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