CN103138912B - Method of data synchronization and system - Google Patents
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Abstract
This application provides a kind of method of data synchronization and system, wherein, method of data synchronization includes: standby station obtains the renewal data message of main website, uses the data of the accumulation layer at the described standby station of described renewal data message synchronization；The data synchronization information of the accumulation layer according to described standby station, synchronizes the data of the cache layer at described standby station.Pass through the application, it is ensured that the data reliability in standby host room, stop the generation of dirty data.
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 sets or the identical IT system of many set functions in strange land relatively far apart, can carry out state of health monitoring from each other and function switches.At one, system is because, when surprisingly (such as fire, earthquake etc.) quit work, whole application system can be switched at another so that this systemic-function can continue normally to work.Disaster tolerance technology is an ingredient of the High availability of system, and disaster tolerance system is more emphasized to process the external environment impact on system, the particularly catastrophic event impact on whole IT node, it is provided that node level other system recovery function.
A kind of existing disaster tolerance system is as it is shown in figure 1, include main equipment room part and standby host room part, and both includes application server, cache layer (buffering cluster) and accumulation layer (storage device).As the backup of main equipment room, when main equipment room is because of unexpected quitting work, enables standby host room and work on.Current in the disaster tolerance system scheme of machine room, use cache layer to isolate Tong Bu with accumulation layer, i.e. the cache layer in standby host room carries out synchronize with the cache layer of main equipment room, and the accumulation layer in standby host room carries out synchronize with the accumulation layer of main equipment room, as shown in Figure 1.But, owing to caching system and storage system are heterogeneous system, caching system storage speed is fast, and data block is little, and its synchronous efficiency is far above data persistence layer, and, cache layer synchronization is Tong Bu with accumulation layer all exists unsuccessfully probability.Therefore, cache layer and accumulation layer use the privately owned method of synchronization, will necessarily cause data cannot the coordinating and unifying, cause cache layer data syn-chronization cannot keep consistent with accumulation layer data syn-chronization, generation dirty data.
In this case, current in the disaster tolerance system scheme of machine room, if main equipment room generation disaster, standby host room carrying all services, when user accesses standby host room, then it is very likely to get dirty data, thus absolutely data reliability cannot be ensured, cause data display mistake or mistake in computation etc., significantly reduce user's experience and data reliability.
Summary of the invention
Technical problems to be solved in this application are to provide a kind of method of data synchronization across machine room and system, to solve when across the active and standby disaster tolerance system data syn-chronization of machine room, and the problem that data reliability is low and user's experience is the highest.
In order to solve the problems referred to above, this application discloses a kind of method of data synchronization, including: standby station obtains the renewal data message of main website, uses the data of the accumulation layer at the described standby station of described renewal data message synchronization；The data synchronization information of the accumulation layer according to described standby station, synchronizes the data of the cache layer at described standby station.
Preferably, the data synchronization information of the accumulation layer at the standby station of described basis, the step of the data synchronizing the cache layer at described standby station includes: the application layer at described standby station obtains the data synchronization information of the accumulation layer at described standby station, synchronizes the data of the cache layer at described standby station according to described data synchronization information.
Preferably, the step updating data message that described standby station obtains main website includes: described standby station, by the first Update log generated after obtaining the accumulation layer more new data of described main website, obtains the renewal data message of described main website.
Preferably, after described data synchronization information is the data of the accumulation layer at the described standby station of accumulation layer use described renewal data message synchronization at described standby station, the second Update log of generation；The step of the data synchronization information that the application layer at described standby station obtains the accumulation layer at described standby station includes: the application layer at described standby station, by obtaining described second Update log, obtains the data synchronization information of the accumulation layer at described standby station.
Preferably, described data synchronization information is the described renewal data message that described standby station obtains；The step of the data synchronization information that the application layer at described standby station obtains the accumulation layer at described standby station includes: the application layer at described standby station obtains described renewal data message.
Preferably, the step of the data that the application layer at described standby station synchronizes the cache layer at described standby station according to described data synchronization information includes: the application layer at described standby station is according to described data synchronization information, update storage, the data of described data synchronization information instruction in the cache layer at described standby station；Or, the application layer at described standby station, according to described data synchronization information, deletes the data of the described data synchronization information instruction of storage in the cache layer at described standby station.
Preferably, after the data synchronization information of the accumulation layer that the application layer at described standby station obtains described standby station, before the data of the cache layer synchronizing described standby station according to described data synchronization information, also include: current application, according to described data synchronization information, is processed by the application layer at described standby station.
Preferably, before described standby station obtains the step updating data message of main website, also include: the accumulation layer in described main website updates data genaration the first Update log as described renewal data message, while triggering the data syn-chronization at described standby station, the cache layer of described main website obtains described first Update log, updates or deletes the corresponding data in the cache layer of described main website.
In order to solve the problems referred to above, disclosed herein as well is a kind of data synchronous system, including main website and standby station, described standby station includes: the first synchronization module, for obtaining the renewal data message of described main website, described renewal data message is used to synchronize the data of the described standby accumulation layer stood；Second synchronization module, for the data synchronization information of the accumulation layer according to described standby station, synchronizes the data of the cache layer at described standby station.
Preferably, described second synchronization module, for making the application layer at described standby station obtain the data synchronization information of the described accumulation layer for station, synchronize the data of the cache layer at described standby station according to described data synchronization information.
Compared with prior art, the application has the advantage that
After standby station gets the more new data of main website, first by the data of this renewal data syn-chronization standby station accumulation layer, afterwards, the data of resynchronisation standby station cache layer.Reversely update cache layer principle by this accumulation layer, carry out cache synchronization.And the caching interlayer between active and standby station does not synchronizes, it is achieved thereby that the data consistent between active and standby station storage system (accumulation layer), and storage system and the data consistent of caching system, solve in prior art, when across the active and standby disaster tolerance system data syn-chronization of machine room, the problem that data reliability is low and user's experience is the highest, it is ensured that the data reliability in standby host room, has stopped the generation of dirty data.
Accompanying drawing explanation
Fig. 1 is the data syn-chronization schematic diagram of a kind of disaster tolerance system according to prior art；
Fig. 2 is the flow chart of steps of a kind of method of data synchronization according to the embodiment of the present application one；
Fig. 3 is the flow chart of steps of a kind of method of data synchronization according to the embodiment of the present application two；
Fig. 4 is a kind of data syn-chronization schematic diagram according to the embodiment of the present application three；
Fig. 5 is the structured flowchart of a kind of data synchronous system according to the embodiment of the present application four.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the application, feature and advantage to become apparent from, with detailed description of the invention, the application is described in further detail below in conjunction with the accompanying drawings.
Embodiment one
With reference to Fig. 2, it illustrates the flow chart of steps of a kind of method of data synchronization according to 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 accumulation layer at the standby station of described renewal data syn-chronization.
In the present embodiment, the synchronous task between active and standby station can be triggered after main website has updated data, to carry out the data syn-chronization between active and standby station.After standing in the more new data obtaining main website, this more new data is used to update the corresponding data in the accumulation layer at standby station, synchronization with between main website to realize.
Step S104: standby station, according to the data synchronization information of the accumulation layer at standby station, synchronizes the data of the cache layer at standby station.
In this step, after the accumulation layer at standby station has carried out data syn-chronization with main website, standby station obtains and synchronizes relevant data synchronization information to this, and uses this data synchronization information to synchronize corresponding data in the cache layer at standby station.
Wherein, data synchronization information can be the Update log update_log of standby station accumulation layer, it is also possible to be more new data itself.It is of course also possible to for the information that standby station accumulation layer data update arbitrarily can be represented.
Preferably, when carrying out above-mentioned data syn-chronization, it is ensured that synchrodata order.The guarantee of synchrodata order can be arranged the most flexibly by those skilled in the art, and as passed through queue system, which realizes simple, saves and realizes cost.
By the present embodiment, after standby station gets the more new data of main website, first, the data of this renewal data syn-chronization standby station accumulation layer, afterwards, the data of resynchronisation standby station cache layer are used.Reversely update cache layer principle by this accumulation layer, carry out cache synchronization.And the caching interlayer between active and standby station does not synchronizes, it is achieved thereby that the data consistent between active and standby station storage system (accumulation layer), and storage system and the data consistent of caching system, solve in prior art, when across the active and standby disaster tolerance system data syn-chronization of machine room, the problem that data reliability is low and user's experience is the highest, it is ensured that the data reliability in standby host room, has stopped the generation of dirty data.
Embodiment two
With reference to Fig. 3, it illustrates the flow chart of steps of a kind of method of data synchronization according to 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 more new data, generates the first Update log (data of main website accumulation layer more new record).
Wherein, the first Update log have recorded the information of main website accumulation layer more new data.
Step S204: main website triggers standby station and carries out data syn-chronization, sends the first Update log to standby station.
Preferably, triggering while standby station carries out data syn-chronization in main website, the cache layer of main website can obtain the first Update log, updates or deletes the corresponding data in the cache layer of main website.
The cache layer (or buffering cluster, or relief area) of main website may be cached with the data that the accumulation layer of main website updates, in this case, after the cache layer of main website gets the first Update log, these part data that can cache with synchronized update, or, directly by this part data deletion.
Main website sends the first Update log to standby station, triggers active and standby station data syn-chronization.Certainly, more new data directly can also be sent to standby station by main website, carries out data syn-chronization.Use the first Update log to carry the data more fresh information of main website, standby station can be made to determine the data update status of main website quickly and easily, in order to exactly the data at standby station are synchronized, and quantity of information is little, it is convenient and swift to transmit.
Step S206: standby station obtains the first Update log, uses the first Update log to synchronize the data of the accumulation layer for station.
In this step, standby station obtains the first Update log that main website sends, and is updated the corresponding data of the accumulation layer at standby station according to the first Update log.
If main website transmission is more new data, then connects these data of use for standing erectly and standby station accumulation layer corresponding data is updated.
Step S208: after standby station accumulation layer carries out data syn-chronization, generates the second Update log (the data more new record of standby station accumulation layer).
Wherein, the second Update log have recorded the information of the accumulation layer more new data at standby station.Use the second Update log to carry the data more fresh information of standby station accumulation layer, standby station application layer can be made to determine the data update status of accumulation layer quickly and easily, in order to exactly the data of cache layer are synchronized.
Step S210: standby station application layer obtains the second Update log, synchronizes standby station cache layer data according to the second Update log.
In this step, corresponding data in the cache layer of standby station, according to the information of the standby station accumulation layer more new data of record in the second Update log, are synchronized by standby station application layer, as according to the second Update log, update or delete the corresponding data in the cache layer of standby station.Certainly, standby station application layer obtains the second Update log and carries out cache layer synchronizing to be only preferred version, it should be understood by those skilled in the art that and arbitrarily can obtain the second Update log the functional module synchronizing cache layer or entity all can realize this step.Carried out this by standby station application layer to operate, improve data-handling capacity and the efficiency of system.Here, using application layer to operate, being mainly in view of some data cached is to be converted by accumulation layer data.In such as data base, having such data a=2, b=3, application is it is to be appreciated that the value of a × b, and that cache layer the most only needs to store 6, i.e. a × b result, uses the application layer synchrodata of the present embodiment, then need not repeat to realize this service logic.And adopt in other ways, then need to repeat to realize this service logic.
Preferably, the renewal data message that standby station application layer can also directly obtain according to standby station, directly standby station cache layer is carried out data syn-chronization.Directly use and update data message, saved information manufacturing cost, improve data synchronization efficiency.
Preferably, current application, after getting the second Update log or updating data message, can first be processed by standby station application layer, needs the data etc. updated as present in renewal current application.Then, further according to the second Update log or renewal data message, the data of standby station cache layer are synchronized.Current application is first processed by standby station application layer, follow-up need not require data to cache layer or accumulation layer again, save information interactive process, improve system data treatment effeciency.
By the present embodiment, data cached synchronization reversely updates realization by accumulation layer, thus furthermore achieved that the data consistent of active and standby station storage interlayer, and accumulation layer and the data consistent of cache layer, reach to stop dirty data, it is ensured that data reliability, promoted the purpose of Consumer's Experience.
Embodiment three
With reference to Fig. 4, it illustrates a kind of data syn-chronization schematic diagram according to the embodiment of the present application three.In the present embodiment, main website machine room provides data to update and reads service, and standby station machine room provides only reading service.User priority accesses nearest website and reads data.
The method of data synchronization of the present embodiment mainly comprises the steps that
Step S302: standby station, by monitoring the update_log (the first Update log) of main website accumulation layer, obtains more new data, and by the accumulation layer (storage system) of more new data write to standby station.
Step S304: while the accumulation layer more new data of standby station, produce the update_log (the second Update log) at standby station, get renewal entry by the update_log at standby station, send the application (application layer) to standby station.
Step S306: the application at standby station gets update notification, processes data (optional, depending on concrete business demand), updates cache layer (caching system).
Illustrating in terms of two during user accesses application from reading and update individually below, the method for data synchronization of application the present embodiment carries out the process of data syn-chronization.
(1) user accesses application, reads main website or standby station data.
Specifically, including:
Step A: user accesses application, triggers reading event.
Step B: application first looks at buffering cluster, if cache hit (i.e. finding in buffering cluster), the most directly returns result and processes data return user；If not hit in buffering cluster, then accumulation layer, Query Result are read in application, process data (optional, depending on concrete Business Processing), in the data write buffering cluster that simultaneously will find, finally data result are returned user.
(2) user accesses application, updates main website data, triggers active and standby station data syn-chronization.
Wherein, updating and include amendment, write, deletion etc. operates.
Specifically, including:
Step C: user accesses master station application, triggers more new events.
Step D: data are updated to main website accumulation layer by main website, produces main website update_log daily record after main website accumulation layer more new data, trigger main website lock unit and perform synchronous task；Meanwhile, corresponding entry in main website caching is deleted in application, and result is returned.
Step E: standby station accumulation layer lock unit (replicate) obtains change data by main website update_log, and by change write standby station accumulation layer.
Step F: standby station accumulation layer receives more new information, more new data, the most also produces standby station update_log, triggers standby station lock unit.
Step G: standby station lock unit is by more new data notification to standby station application, and standby station application gets data and updates entry, processes data (optional), updates the data in caching.
By process data as optional step, main cause is in practical operation, needs according to concrete service needed, then decides whether to place into caching to after data processed.
By the present embodiment, data cached synchronization reversely updates realization by accumulation layer, has reached data cached and has kept consistent with accumulation layer data, has stopped the purpose of dirty data.
Embodiment four
With reference to Fig. 5, it illustrates the structured flowchart of a kind of data synchronous system according to the embodiment of the present application four.
The data synchronous system of the present embodiment includes main website 402 and standby station 404.Wherein, standby station 404 includes: the first synchronization module 4042, for obtaining the renewal data message of main website 402, uses described renewal data message to synchronize the data of the accumulation layer for station 404；Second synchronization module 4044, for the data synchronization information of the accumulation layer according to standby station 404, synchronizes the data of the cache layer at standby station 404.
Preferably, the second synchronization module 4044, for making the application layer at standby station 404 obtain the data synchronization information of the accumulation layer for station 404, synchronize the data of the cache layer at standby station 404 according to data synchronization information.
Preferably, the first synchronization module 4042, by the first Update log generated after obtaining the accumulation layer more new data of main website 402, obtains the renewal data message of main website 402, uses described renewal data message to synchronize the data of the accumulation layer for station 404.
Preferably, after data synchronization information is the data of the accumulation layer at the standby station 404 of accumulation layer use renewal data message synchronization at standby station 404, the second Update log of generation；Second synchronization module 4044, by obtaining the second Update log, obtains the data synchronization information of the accumulation layer at standby station 404, according to this data synchronization information, synchronizes the data of the cache layer at standby station 404.
Preferably, data synchronization information is standby station 404 acquisition, the renewal data message that main website sends；Second synchronization module 4044 obtains this renewal data message, according to this renewal data message, synchronizes the data of the cache layer at standby station 404.
Preferably, the second synchronization module 4044, according to data synchronization information, updates storage in the cache layer at standby station 404, the data of data synchronization information instruction；Or, according to data synchronization information, delete storage in the cache layer at standby station 404, the data of data synchronization information instruction.
Preferably, the standby station 404 of the present embodiment also includes: application processing module 4046, after obtain the data synchronization information of the accumulation layer at standby station 404 at the second synchronization module 4044, before the data of the cache layer synchronizing standby station 404 according to described data synchronization information, according to described data synchronization information, current application is processed.
Preferably, main website 402 updates data genaration the first Update log as updating data message in the accumulation layer of main website 402, while triggering the data syn-chronization at standby station 404, the cache layer of main website 402 obtains the first Update log, updates or deletes the corresponding data in the cache layer of main website 402.
The data synchronous system of the present embodiment, by monitoring the update_log of main website accumulation layer, obtains more new data, and will more newly written to standby station storage system；Standby station storage system, while more new data, produces update_log, standby station update_log and gets renewal entry, send to application；Application gets update notification, processes data, updates caching system.
The data synchronous system of the present embodiment realizes the method for data synchronization in aforesaid plurality of embodiment of the method, and has the beneficial effect of preceding method embodiment, does not repeats them here.
The data synchronization technology scheme that the application provides, buffer memory principle is reversely updated by accumulation layer, carry out cache synchronization, and do not synchronize between the caching system of active and standby station, not only solve the data consistent problem between active and standby station storage system, also solve the problem that caching system is consistent with storage inter-system data, it is ensured that the data reliability of standby station machine room, stop the generation of dirty data.
Each embodiment in this specification all uses the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and between each embodiment, identical similar part sees mutually.For system embodiment, due to itself and embodiment of the method basic simlarity, so describe is fairly simple, relevant part sees the part of embodiment of the method and illustrates.
Above to a kind of method of data synchronization provided herein and device, it is described in detail, principle and the embodiment of the application are set forth by specific case used herein, and the explanation of above example is only intended to help and understands the present processes and core concept thereof；Simultaneously for one of ordinary skill in the art, according to the thought of the application, the most all will change, in sum, this specification content should not be construed as the restriction to the application.
Claims (7)
1. a method of data synchronization, it is characterised in that including:
Standby station obtains the renewal data message of main website, uses described renewal data message to synchronize the data of the described accumulation layer for station；
The data synchronization information of the accumulation layer according to described standby station, synchronizes the data of the cache layer at described standby station；Farther include: the application layer at described standby station obtains the data synchronization information of the accumulation layer at described standby station, the application layer at described standby station is according to described data synchronization information, current application is processed, and synchronizes the data of the cache layer at described standby station according to described data synchronization information.
Method the most according to claim 1, it is characterised in that the step updating data message that described standby station obtains main website includes:
Described standby station, by the first Update log generated after obtaining the accumulation layer more new data of described main website, obtains the renewal data message of described main website.
Method the most according to claim 1, it is characterised in that after described data synchronization information is the data of the accumulation layer at the described standby station of accumulation layer use described renewal data message synchronization at described standby station, the second Update log of generation；
The step of the data synchronization information that the application layer at described standby station obtains the accumulation layer at described standby station includes: the application layer at described standby station, by obtaining described second Update log, obtains the data synchronization information of the accumulation layer at described standby station.
Method the most according to claim 1, it is characterised in that described data synchronization information is the described renewal data message that described standby station obtains；
The step of the data synchronization information that the application layer at described standby station obtains the accumulation layer at described standby station includes: the application layer at described standby station obtains described renewal data message.
Method the most according to claim 1, it is characterised in that the step of the data that the application layer at described standby station synchronizes the cache layer at described standby station according to described data synchronization information includes:
The application layer at described standby station, according to described data synchronization information, updates storage, the data of described data synchronization information instruction in the cache layer at described standby station；Or, the application layer at described standby station, according to described data synchronization information, deletes the data of the described data synchronization information instruction of storage in the cache layer at described standby station.
Method the most according to claim 1, it is characterised in that before described standby station obtains the step updating data message of main website, also include:
Accumulation layer in described main website updates data genaration the first Update log as described renewal data message, while triggering the data syn-chronization at described standby station, the cache layer of described main website obtains described first Update log, updates or deletes the corresponding data in the cache layer of described main website.
7. a data synchronous system, including main website and standby station, it is characterised in that described standby station includes:
First synchronization module, for obtaining the renewal data message of described main website, uses described renewal data message to synchronize the data of the described standby accumulation layer stood；
Second synchronization module, for making the application layer at described standby station obtain the data synchronization information of the described standby accumulation layer stood, current application, according to described data synchronization information, is processed by the application layer at described standby station, and synchronizes the data of the cache layer at described standby station according to 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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| CN105471948B (en) * | 2014-09-05 | 2019-02-19 | 阿里巴巴集团控股有限公司 | The method and device of inter-system synchronization business datum |
| 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 |
| CN104980519B (en) * | 2015-06-29 | 2019-03-05 | 北京奇虎科技有限公司 | Multimachine room storage system |
| CN105511808B (en) * | 2015-12-01 | 2019-12-17 | 腾讯科技（深圳）有限公司 | Data operation method, system and related device |
| CN106980625B (en) * | 2016-01-18 | 2020-08-04 | 阿里巴巴集团控股有限公司 | Data synchronization method, device and system |
| CN106255103A (en) * | 2016-07-29 | 2016-12-21 | 华为技术有限公司 | A kind of method of data synchronization and equipment |
| CN109284066B (en) * | 2017-07-19 | 2022-09-30 | 阿里巴巴集团控股有限公司 | Data processing method, device, equipment and system |
| CN107547632B (en) * | 2017-07-25 | 2021-01-22 | 阿里巴巴（中国）有限公司 | Cache data synchronization method, equipment, service center and multi-center service system |
| CN108306989B (en) * | 2018-04-20 | 2020-02-14 | 北京全路通信信号研究设计院集团有限公司 | Main and standby machine data synchronization method for railway dispatching centralized system |
| CN108572890A (en) * | 2018-04-26 | 2018-09-25 | 赵程章 | Transaction Information synchronous method and device |
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| CN102012793A (en) * | 2010-11-12 | 2011-04-13 | 浪潮(北京)电子信息产业有限公司 | Mirror image implementing method and device |
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| CN103138912A (en) | 2013-06-05 |
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