CN109144418A - A kind of method of data synchronization and device - Google Patents
A kind of method of data synchronization and device Download PDFInfo
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- CN109144418A CN109144418A CN201810934585.2A CN201810934585A CN109144418A CN 109144418 A CN109144418 A CN 109144418A CN 201810934585 A CN201810934585 A CN 201810934585A CN 109144418 A CN109144418 A CN 109144418A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
- G06F3/065—Replication mechanisms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0683—Plurality of storage devices
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Abstract
This application discloses a kind of method of data synchronization and devices, it is replication relation between first memory and second memory, first memory is divided into the first storage region of the first number, second memory is divided into the second storage region of the first number, first storage region and the second storage region correspond, replication relation each other between the first storage region and the second storage region corresponding with the first storage region；It include: the data modification mark of acquisition the first storage region of the first number, and, the data modification for obtaining the second storage region of the first number identifies；It is identified using the data modification mark of the first storage region and the data modification of the second storage region, determines the variance data between the data stored in first memory and the data stored in second memory；Processing is synchronized to variance data, so that the data stored in first memory and the data stored in second memory are identical.To effectively improve the synchronous efficiency of data.
Description
Technical field
This application involves data processing fields, more particularly to a kind of method of data synchronization and device.
Background technique
Within the storage system, replication relation can be established between two memories, passes through the number between two memories
Realize the backup of data, according to duplication to achieve the purpose that disaster tolerance.
In some scenes, when the replication relation between two memories stops, two memories can become can
Read writeable state.That is, the data in two memories have when the replication relation between two memories stops
It may have occurred variation.And when being again started up replication relation, it needs to synchronize processing to the data in two memories, with
Realize the backup to data.
How rapidly and efficiently processing is synchronized to the data in two synchronizers, be current urgent problem.
Summary of the invention
Technical problems to be solved in this application be how the data in two synchronizers are synchronized rapidly and efficiently
Processing provides a kind of method of data synchronization and device.
In a first aspect, the embodiment of the present application provides a kind of method of data synchronization, first memory and second memory it
Between be replication relation, the first memory is divided into the first number the first storage region, and the second memory is drawn
It is divided into the first number the second storage region, first storage region and second storage region correspond, and described the
Replication relation each other between one storage region and the second storage region corresponding with first storage region；Include:
Obtain the data modification mark of the first storage region of first number；And obtain first number
The data modification of second storage region identifies；
It is identified using the data modification mark of first storage region and the data modification of second storage region, really
The data stored in the fixed first memory and the data stored in the second memory are with the presence or absence of variance data；
If it exists, processing is synchronized to the variance data, so that the data stored in the first memory and institute
It is identical to state the data stored in second memory.
Optionally, the data of the data modification mark and second storage region using first storage region
Modified logo determines the data stored in the first memory and the data stored in second storage with the presence or absence of difference
Data, comprising:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is calculated, and calculated result is obtained；
If the calculated result is not equal to initial value, it is determined that the data stored in the first memory and described second
The data stored in storage have differences data.
Optionally, the initial value is 0, and the data modification mark includes 1 or 0；If first storage region
Data modification is identified as 1, then it represents that the data stored in first storage region are changed, if first memory block
The data modification in domain is identified as 0, then it represents that the data stored in first storage region do not change；If described second deposits
The data modification in storage area domain is identified as 1, then it represents that and the data stored in second storage region are changed, if described
The data modification of two storage regions is identified as 0, then it represents that the data stored in second storage region do not change；
It is described that the data modification mark of first storage region and corresponding with first storage region second are deposited
The data modification mark in storage area domain is calculated, and calculated result is obtained, comprising:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is carried out or is calculated, and obtains calculated result.
Optionally, the initial value is 1, and the data modification mark includes 0 or 1；If first storage region
Data modification is identified as 0, then it represents that the data stored in first storage region are changed, if first memory block
The data modification in domain is identified as 1, then it represents that the data stored in first storage region do not change；If described second deposits
The data modification in storage area domain is identified as 0, then it represents that and the data stored in second storage region are changed, if described
The data modification of two storage regions is identified as 1, then it represents that the data stored in second storage region do not change；
It is described that the data modification mark of first storage region and corresponding with first storage region second are deposited
The data modification mark in storage area domain is calculated, and calculated result is obtained, comprising:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is carried out and is calculated, and obtains calculated result.
Optionally, it is described obtain calculated result after, the method also includes:
The data modification mark of the data modification mark of first storage region and/or second storage region is repaired
It is changed to the initial value.
Optionally, the method also includes:
If the replication relation of the first memory and the second memory stop, and the first memory and/or
The second memory be in it is readable can write state when, if the data in first storage region change, and described the
The data modification of one storage region is identified as the initial value, then modifies the data modification mark of first storage region；With/
Or, if the data in second storage region change, and the data modification of second storage region be identified as it is described
Initial value then modifies the data modification mark of second storage region.
Second aspect, the embodiment of the present application provide a kind of data synchronization unit, first memory and second memory it
Between be replication relation, the first memory is divided into the first number the first storage region, and the second memory is drawn
It is divided into the first number the second storage region, first storage region and second storage region correspond, and described the
Replication relation each other between one storage region and the second storage region corresponding with first storage region；Include:
Acquiring unit, for obtaining the data modification mark of the first storage region of first number；And obtain institute
State the data modification mark of the second storage region of the first number；
Determination unit, the number for data modification mark and second storage region using first storage region
According to modified logo, determine between the data stored in the first memory and the data stored in the second memory whether
Have differences data；
Synchronization unit, for if it exists, processing being synchronized to the variance data, so that depositing in the first memory
The data stored in the data of storage and the second memory are identical.
Optionally, the determination unit, is specifically used for:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is calculated, and calculated result is obtained；
If the calculated result is not equal to initial value, it is determined that the data stored in the first memory and described second
The data stored in storage have differences data.
Optionally, the initial value is 0, and the data modification mark includes 1 or 0；If first storage region
Data modification is identified as 1, then it represents that the data stored in first storage region are changed, if first memory block
The data modification in domain is identified as 0, then it represents that the data stored in first storage region do not change；If described second deposits
The data modification in storage area domain is identified as 1, then it represents that and the data stored in second storage region are changed, if described
The data modification of two storage regions is identified as 0, then it represents that the data stored in second storage region do not change；
It is described that the data modification mark of first storage region and corresponding with first storage region second are deposited
The data modification mark in storage area domain is calculated, and calculated result is obtained, comprising:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is carried out or is calculated, and obtains calculated result.
Optionally, the initial value is 1, and the data modification mark includes 0 or 1；If first storage region
Data modification is identified as 0, then it represents that the data stored in first storage region are changed, if first memory block
The data modification in domain is identified as 1, then it represents that the data stored in first storage region do not change；If described second deposits
The data modification in storage area domain is identified as 0, then it represents that and the data stored in second storage region are changed, if described
The data modification of two storage regions is identified as 1, then it represents that the data stored in second storage region do not change；
It is described that the data modification mark of first storage region and corresponding with first storage region second are deposited
The data modification mark in storage area domain is calculated, and calculated result is obtained, comprising:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is carried out and is calculated, and obtains calculated result.
Optionally, described device further include:
First modification unit, for by the data modification of first storage region mark and/or second memory block
The data modification mark in domain is revised as the initial value.
Optionally, described device further include:
Second modification unit, if stopping for the replication relation of the first memory and the second memory, and institute
State first memory and/or the second memory be in it is readable can write state when, if the data in first storage region
It changes, and the data modification of first storage region is identified as the initial value, then modifies first storage region
Data modification mark；And/or if the data in second storage region change, and second storage region
Data modification is identified as the initial value, then modifies the data modification mark of second storage region.
Compared with prior art, the embodiment of the present application has the advantage that
The embodiment of the present application provides a kind of method of data synchronization and device, wherein first memory and second memory
Between be replication relation, the first memory is divided into the first number the first storage region, the second memory quilt
It is divided into the second storage region of the first number, first storage region and second storage region correspond, described
Replication relation each other between first storage region and the second storage region corresponding with first storage region.It include: to obtain
The data modification mark of the first storage region of first number, and, obtain the second storage region of first number
Data modification mark；Utilize the data modification of the data modification mark and second storage region of first storage region
Mark, determines the difference number between the data stored in the first memory and the data stored in the second memory
According to；Processing is synchronized to the variance data, so that the data stored in the first memory and the second memory
The data of middle storage are identical.It can be seen that in the embodiment of the present application, since the data modification mark of the first storage region can be with
Whether the data of the first storage region storage are changed in characterization first memory, the data modification mark of the second storage region
Knowing can characterize whether the data that the second storage region stores in second memory are changed.Therefore, it can use first
The data modification mark of storage region and the data modification of second storage region identify, and determine to store in first memory
Data and second memory in the data that store with the presence or absence of variance data, to further be synchronized to the variance data
Processing, so that the data stored in first memory and the data stored in the second memory are identical.That is, at this
In application, processing only is synchronized to variance data, rather than as in the prior art, being synchronized to all data
Processing, to effectively improve the synchronous efficiency of data.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of first memory provided by the embodiments of the present application and second memory；
Fig. 2 is a kind of flow diagram of method of data synchronization provided by the embodiments of the present application；
Fig. 3 is the schematic diagram of calculated result provided by the embodiments of the present application；
Fig. 4 is the schematic diagram of calculated result provided by the embodiments of the present application；
A kind of Fig. 5 structural schematic diagram of data synchronization unit provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only this
Apply for a part of the embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall in the protection scope of this application.
Present inventor has found after study, in some scenes, when the replication relation between two memories stops
When only, two memories can become readable writeable state.That is, when the replication relation between two memories stops
When only, the data in two memories have been likely to occur variation.And when being again started up replication relation, it needs to deposit two
Data in reservoir synchronize processing, to realize the backup to data.
Currently, when the replication relation between two memories stops, it can be all to being stored in two memories
Data synchronize processing, for example, the data stored in first memory are all copied in second memory, covering second
The data stored in memory.It is understood that if the data volume stored in two memories is very big, to all data
The mode of processing is synchronized, so that the efficiency that data synchronize is very low.
Inventor has found under study for action, and when being again started up replication relation, the partial data stored in first memory can
Energy does not change, correspondingly, the partial data stored in second memory may also not change, simultaneously to these
The data not changed can be without any processing in synchronization process, so that the data volume for needing to synchronize is reduced,
To promote the synchronous efficiency of data.
In consideration of it, the embodiment of the present application provides a kind of method of data synchronization and device, wherein first memory and second
It is replication relation between memory, the first memory is divided into the first storage region of the first number, and described second deposits
Reservoir is divided into the second storage region of the first number, and first storage region and second storage region one are a pair of
It answers, replication relation each other between first storage region and the second storage region corresponding with first storage region.Packet
It includes: obtaining the data modification mark of the first storage region of first number, and, it obtains first number second and deposits
The data modification in storage area domain identifies；Utilize the number of the data modification mark and second storage region of first storage region
According to modified logo, determine between the data stored in the first memory and the data stored in the second memory whether
Have differences data；Processing is synchronized to the variance data if it exists, so that the data stored in the first memory
It is identical as the data stored in the second memory.
It can be seen that in the embodiment of the present application, since the data modification mark of the first storage region can characterize first
Whether the data that the first storage region stores in memory are changed, and the data modification mark of the second storage region can be with table
Whether the data of the second storage region storage are changed in sign second memory.Therefore, it can use the first storage region
Data modification mark and second storage region data modification identify, determine the data stored in first memory and
The data stored in second memory make with the presence or absence of variance data to further synchronize processing to the variance data
The data for obtaining the data stored in first memory and storing in the second memory are identical.That is, in this application,
Processing only is synchronized to variance data, rather than as in the prior art, synchronizing processing to all data, from
And effectively improve the synchronous efficiency of data.
With reference to the accompanying drawing, the various non-limiting embodiments of the application are described in detail.
Illustrative methods
For convenience of understanding, combine Fig. 1 that method of data synchronization provided by the embodiments of the present application is introduced first.
Referring to Fig. 1, which is the structural schematic diagram of first memory and second memory provided by the embodiments of the present application.
It should be noted that being replication relation between first memory 100 shown in FIG. 1 and second memory 200.It is so-called
Replication relation, it is possible to understand that at first memory 100 be the backup of second memory 200 or the second storage 200 is first to deposit
The backup of reservoir 100.
In the embodiment of the present application, after the backup relation of first memory 100 and second memory 200 stops, first
Memory 100 and second memory 200 can become it is readable can write state.When restoring replication relation again, need to the
The data that the data and second memory 200 of the storage of one memory 100 store synchronize, so that first memory 100 stores
The data that store of data and second memory 200 it is identical.
It is understood that due to replication relation each other between first memory 100 and second memory 200,
The size of the memory space of the size and second memory 200 of the memory space of one memory 100 can be identical.
In the embodiment of the present application, the first memory 100 can be divided into the first storage region of the first number,
The second memory 200 can be divided into the first number the second storage region, first storage region and described the
Two storage regions correspond, between first storage region and the second storage region corresponding with first storage region
Replication relation each other.
In conjunction with Fig. 1, in Fig. 1, first memory 100 is divided into 8 the first storage regions, respectively 110,120,130,
140,150,160,170 and 180.Correspondingly, second memory 200 is divided into 8 the second storage regions, respectively 210,
220,230,240,250,260,270 and 280.
Wherein, be between the first storage region and the second storage region it is one-to-one, specifically, the first storage region and
Corresponding relationship between second storage region can be corresponding relationship as shown in the table.
Table 1
| First storage region | Second storage region |
| 110 | 210 |
| 120 | 220 |
| 130 | 230 |
| 140 | 240 |
| 150 | 250 |
| 160 | 260 |
| 170 | 270 |
| 180 | 280 |
Replication relation each other between first storage region and the second storage region corresponding with first storage region.?
That is when starting replication relation, the data and the second storage corresponding with the first storage region that are stored in the first storage region
The data stored in region are identical.
In conjunction with table 1, it is replication relation between the first storage region 110 and the second storage region 210, starts replication relation
When, the data stored in the data and the second storage region 210 that store in the first storage region 110 are identical；First storage region
120 and second be replication relation between storage region 220, when starting replication relation, the data that are stored in the first storage region 120
It is identical with the data stored in the second storage region 220；It is duplication between first storage region 130 and the second storage region 230
Relationship, the data stored in the data and the second storage region 230 stored when starting replication relation, in the first storage region 130
It is identical；It is replication relation between first storage region 140 and the second storage region 240, when starting replication relation, the first memory block
The data stored in domain 140 and the data stored in the second storage region 240 are identical；First storage region 150 and the second storage
It is replication relation, the data stored in the first storage region 150 when starting replication relation and the second memory block between region 250
The data stored in domain 250 are identical；It is replication relation, starting duplication between first storage region 160 and the second storage region 260
When relationship, the data stored in the data and the second storage region 260 that store in the first storage region 160 are identical；First storage
It is replication relation between region 170 and the second storage region 270, when starting replication relation, is stored in the first storage region 170
The data stored in data and the second storage region 270 are identical；It is between first storage region 180 and the second storage region 280
Replication relation stores in the data and the second storage region 280 stored when starting replication relation, in the first storage region 180
Data are identical.
It should be noted that the embodiment of the present application does not limit the big of memory space shared by each first storage region specifically
Small, the size of memory space shared by each first storage region may be the same or different, and the embodiment of the present application does not limit specifically
Fixed, correspondingly, the embodiment of the present application does not limit the size of memory space shared by each second storage region specifically, each second is deposited
The size of memory space shared by storage area domain may be the same or different, and the embodiment of the present application does not limit specifically.It is understood that
It is, due to being replication relation between the first storage region and the second storage region corresponding with first storage region,
It is stored shared by the size of memory space shared by first storage region and the second storage region corresponding with first storage region
The size in space can be identical.
For example, the size of memory space shared by the first storage region 110 and the shared storage of the first storage region 120 are empty
Between size may be the same or different.The size and the second storage region of memory space shared by second storage region 210
The size of memory space shared by 220 may be the same or different.The size of memory space shared by first storage region 110 and
The size of memory space shared by second storage region 210 is identical, the size and second of memory space shared by the first storage region 120
The size of memory space shared by storage region 220 is identical.
It should be noted that Fig. 1 is illustrated so that the first number is 8, i.e., it is only to divide first memory
At 8 the first storage regions, second memory is divided into 8 the second storage regions to be illustrated.It does not constitute to this Shen
Please the restriction of embodiment do not limit the number of first number, the number of first number can in the embodiment of the present application
With determines according to actual conditions.
It should be noted that the embodiment of the present application to first memory and second memory without limitation.Described first deposits
Reservoir and the second memory for example can be hard disk.
Referring to fig. 2, which is a kind of flow diagram of method of data synchronization provided by the embodiments of the present application.
Method of data synchronization provided by the embodiments of the present application, such as can be realized with S201-S203 as follows.
S201: the data modification mark of the first storage region of first number is obtained；And obtain first number
The data modification mark of the second storage region of mesh.
It should be noted that in the embodiment of the present application, the data modification of first storage region identifies, for characterizing
Whether the data of the first storage region storage are changed later in upper primary replication relation stopping.Correspondingly, described
The data modification of second storage region identifies, for characterizing the data of the second storage region storage in upper primary replication relation
Stop whether being changed later.
It is understood that the data of the first storage region storage have occurred after upper primary replication relation stops
Change, then it represents that the data of first storage region storage are likely to and the second storage region corresponding with first storage region
The data of middle storage are different.Correspondingly, the data of the second storage region storage are sent out after upper primary replication relation stops
Change is given birth to, then it represents that the data of second storage region storage are likely to and the first storage corresponding with second storage region
The data stored in region are different.
The data modification that the embodiment of the present application does not limit first storage region specifically identifies and second memory block
The data modification in domain identifies.
S202: the data modification mark of the data modification mark and second storage region of first storage region is utilized
Know, determine the data stored in the first memory and the data stored in the second memory whether variance data.
It should be noted that step S202 is in specific implementation, such as can be realized with A-B as follows.
Step A: to the data modification of first storage region mark and with first storage region corresponding second
The data modification mark of storage region is calculated, and calculated result is obtained.
Step B: if the calculated result is not equal to initial value, it is determined that the data stored in the first memory and institute
It states the data stored in second memory and has differences data.
About step A and step B, it should be noted that the embodiment of the present application does not limit the initial value specifically, described first
The value of initial value for example can be 0 or be 1.
When the data modification of first storage region is identified as the initial value, indicate that first storage region is deposited
The data of storage do not change after upper primary replication relation stops；When the data modification of first storage region identifies not
When for the initial value, indicate that the data of the first storage region storage are changed after upper primary replication relation stops
Become.
Correspondingly, indicating that described second deposits when the data modification of second storage region is identified as the initial value
The data of storage area domain storage do not change after upper primary replication relation stops；When the data of second storage region are repaired
When changing mark not for the initial value, indicate the data of the second storage region storage after upper primary replication relation stops
Changed.
It should be noted that the value of locating initial value is different, the specific implementation of step A is also different.It is introduced below
Two kinds of possible implementations.
The first implementation: the initial value is 0, and the data modification mark includes 1 or 0.
It is understood that if the data modification of first storage region is identified as 1, then it represents that first memory block
Change has occurred in the data stored in domain, and (data of the i.e. described first storage region storage are after upper primary replication relation stops
Changed), if the data modification of first storage region is identified as 0, then it represents that stored in first storage region
Data do not change that (i.e. the data of first storage region storage do not change after upper primary replication relation stops
Become)；If the data modification of second storage region is identified as 1, then it represents that the data hair stored in second storage region
Change (data of the i.e. described second storage region storage are changed after upper primary replication relation stops) being given birth to, if institute
The data modification for stating the second storage region is identified as 0, then it represents that the data stored in second storage region do not change
(data of the i.e. described second storage region storage do not change after upper primary replication relation stops).
In this case, step A in specific implementation, can to the data modification of first storage region identify and
The data modification mark of the second storage region corresponding with first storage region is carried out or is calculated, and obtains calculated result.
Further, if calculated result is 1, it is determined that first storage region and/or described and described first storage
The data stored in corresponding second storage region in region are the variance data.
Specifically, it can be understood that the figure is the schematic diagram of calculated result provided by the embodiments of the present application in conjunction with Fig. 3.
In Fig. 3, the data modification of the first storage region 120 is identified as " 1 ", the data modification mark of the first storage region 170
Knowing is " 1 ", and the data modification mark of other first storage regions is " 0 ".The data modification of second storage region 210 is identified as
The data modification of " 1 ", the second storage region 260 is identified as " 1 ", and the data modification of third storage region 270 is identified as " 1 ",
The data modification of its second storage region is identified as " 0 ".After being calculated, obtained calculated result such as 300 institutes in Fig. 3
Show.Wherein:
310 identify the meter identified with the data modification of the second storage region 210 for the data modification of the first storage region 110
Calculate result；320 identify the meter identified with the data modification of the second storage region 220 for the data modification of the first storage region 120
Calculate result；330 identify the meter identified with the data modification of the second storage region 230 for the data modification of the first storage region 130
Calculate result；340 identify the meter identified with the data modification of the second storage region 240 for the data modification of the first storage region 140
Calculate result；350 identify the meter identified with the data modification of the second storage region 250 for the data modification of the first storage region 150
Calculate result；360 identify the meter identified with the data modification of the second storage region 260 for the data modification of the first storage region 160
Calculate result；370 identify the meter identified with the data modification of the second storage region 270 for the data modification of the first storage region 170
Calculate result；380 identify the meter identified with the data modification of the second storage region 280 for the data modification of the first storage region 180
Calculate result.
From 300 it is found that 310 value is not equal to initial value " 0 ", 320 value is not equal to initial value " 0 ", and 360 value is not equal to
Initial value " 0 ", 370 value are not equal to initial value " 0 ".Hence, it can be determined that the first storage region of 310 value is calculated
Data are had differences between the data of 110 storages and the data of the second storage region 210 storage；320 value is calculated in determination
The first storage region 120 storage data and the second storage region 220 storage data between have differences data；Determine meter
It calculates between the data of the first storage region 160 storage and the data of the second storage region 260 storage for the value for obtaining 360 in the presence of poor
Heteromerism evidence；What the data and the second storage region 270 that the first storage region 170 of the determining value for being calculated 370 stores stored
Data are had differences between data.
Second of implementation: the initial value is 0, and the data modification mark includes 1 or 0.
It is understood that if the data modification of first storage region is identified as 0, then it represents that first memory block
Change has occurred in the data stored in domain, and (data of the i.e. described first storage region storage are after upper primary replication relation stops
Changed), if the data modification of first storage region is identified as 1, then it represents that stored in first storage region
Data do not change that (i.e. the data of first storage region storage do not change after upper primary replication relation stops
Become)；If the data modification of second storage region is identified as 0, then it represents that the data hair stored in second storage region
Change (data of the i.e. described second storage region storage are changed after upper primary replication relation stops) being given birth to, if institute
The data modification for stating the second storage region is identified as 1, then it represents that the data stored in second storage region do not change
(data of the i.e. described second storage region storage do not change after upper primary replication relation stops).
In this case, step A in specific implementation, can to the data modification of first storage region identify and
The data modification mark of the second storage region corresponding with first storage region is carried out and is calculated, and obtains calculated result.
Further, if calculated result is 0, it is determined that first storage region and/or described and described first storage
The data stored in corresponding second storage region in region are the variance data.
Specifically, it can be understood that the figure is the schematic diagram of calculated result provided by the embodiments of the present application in conjunction with Fig. 4.
In Fig. 4, the data modification of the first storage region 120 is identified as " 0 ", the data modification mark of the first storage region 170
Knowing is " 0 ", and the data modification mark of other first storage regions is " 1 ".The data modification of second storage region 210 is identified as
The data modification of " 0 ", the second storage region 260 is identified as " 0 ", and the data modification of third storage region 270 is identified as " 0 ",
The data modification of its second storage region is identified as " 1 ".After being calculated, obtained calculated result such as 300 institutes in Fig. 4
Show.Wherein:
310 identify the meter identified with the data modification of the second storage region 210 for the data modification of the first storage region 110
Calculate result；320 identify the meter identified with the data modification of the second storage region 220 for the data modification of the first storage region 120
Calculate result；330 identify the meter identified with the data modification of the second storage region 230 for the data modification of the first storage region 130
Calculate result；340 identify the meter identified with the data modification of the second storage region 240 for the data modification of the first storage region 140
Calculate result；350 identify the meter identified with the data modification of the second storage region 250 for the data modification of the first storage region 150
Calculate result；360 identify the meter identified with the data modification of the second storage region 260 for the data modification of the first storage region 160
Calculate result；370 identify the meter identified with the data modification of the second storage region 270 for the data modification of the first storage region 170
Calculate result；380 identify the meter identified with the data modification of the second storage region 280 for the data modification of the first storage region 180
Calculate result.
From 300 it is found that 310 value is not equal to initial value " 1 ", 320 value is not equal to initial value " 1 ", and 360 value is not equal to
Initial value " 1 ", 370 value are not equal to initial value " 1 ".Hence, it can be determined that the first storage region of 310 value is calculated
Data are had differences between the data of 110 storages and the data of the second storage region 210 storage；320 value is calculated in determination
The first storage region 120 storage data and the second storage region 220 storage data between have differences data；Determine meter
It calculates between the data of the first storage region 160 storage and the data of the second storage region 260 storage for the value for obtaining 360 in the presence of poor
Heteromerism evidence；What the data and the second storage region 270 that the first storage region 170 of the determining value for being calculated 370 stores stored
Data are had differences between data.
S203: synchronizing processing to the variance data so that the data stored in the first memory with it is described
The data stored in second memory are identical.
In the embodiment of the present application, if the data that are stored in first storage region and with first storage region pair
Data are had differences between the data stored in the second storage region answered, then can will be stored in first storage region
Data copy in the second storage region corresponding with first storage region, to cover described and first storage region pair
The data stored in the second storage region answered.The data stored in second storage region can also be copied to this
In corresponding first storage region of two storage regions, to cover first storage region corresponding with second storage region
The data of middle storage.
For example, when synchronizing processing to the data stored in the first storage region 110, it can be by the first memory block
The data stored in domain 110 copy in the second storage region 210, to cover number currently stored in the second storage region 210
According to data currently stored in the second storage region 210 can also being copied in the first storage region 110, to cover first
Currently stored data in storage region 110.
As above, the data modification of first storage region is identified, for characterizing the first storage region storage
Whether data are changed later in upper primary replication relation stopping.Correspondingly, the data modification of second storage region
Whether mark, the data for characterizing the second storage region storage are changed later in upper primary replication relation stopping
Become.The data of the first storage region storage are changed after upper primary replication relation stops, then it represents that this first
The data of storage region storage be likely to and the second storage region corresponding from first storage region in the data that store it is different.
Correspondingly, the data of the second storage region storage are changed after upper primary replication relation stops, then it represents that should
The data of second storage region storage be likely to and the first storage region corresponding with second storage region in the data that store
It is different.
And to the data modification of first storage region mark and the second storage corresponding with first storage region
The data modification mark in region is calculated, and after obtaining calculated result, the first memory block can be determined according to the calculated result
The data stored in the data and second storage region stored in domain whether there is variance data.In consideration of it, in the application
In embodiment, after obtaining the calculated result, the data modification of first storage region can also be identified and/or described
The data modification mark of second storage region is revised as the initial value.For example, being understood in conjunction with Fig. 3, according to the first storage
The data modification mark in region 110 and the data modification mark of the second storage region 120 are calculated after 310 value, can be with
The data modification mark of the data modification mark of first storage region 110 and/or the second storage region 210 is revised as initial value
“0”。
It should be noted that in the embodiment of the present application, after being synchronized to the variance data, can further by
The calculated result that the data modification mark of first storage region and the data modification of the second storage region identify is revised as institute
State initial value.For example, being understood in conjunction with Fig. 3, the data modification mark of the first storage region 110 and the second storage region 210
The data modification calculated result that is calculated of mark not equal to initial value " 0 ", then to being stored in the first storage region 110
Data and the second storage region 120 in after the data that store synchronize, 310 value can be revised as initial value " 0 ".
It is understood that after to the synchronizing of variance data processing, the first memory and described
The replication relation of second memory may stop.At this point, the first memory and/or the second memory are likely to be at
It is readable can write state.When replication relation for the ease of starting first memory and second memory next time, to described first
The data stored in memory and the data stored in the second memory synchronize processing, in the embodiment of the present application,
If the data in first storage region change, and the data modification of first storage region be identified as it is described initial
Value then modifies the data modification mark of first storage region.If the data in second storage region change, and
The data modification of second storage region is identified as the initial value, then modifies the data modification mark of second storage region
Know.
It can be seen that using method of data synchronization provided by the embodiments of the present application, since the data of the first storage region are repaired
Changing mark can characterize whether the data that the first storage region stores in first memory are changed, the second storage region
Data modification mark can characterize whether the data that the second storage region stores in second memory are changed.Therefore, may be used
It is identified with the data modification using the data modification of the first storage region mark and second storage region, determines that first deposits
The data stored in the data and second memory stored in reservoir whether there is variance data, thus further to the difference number
According to processing is synchronized, so that the data stored in first memory and the data stored in the second memory are identical.?
That is in this application, processing only is synchronized to variance data, rather than picture is in the prior art, to all numbers
According to processing is synchronized, to effectively improve the synchronous efficiency of data.
Example devices
Based on the method for data synchronization that above method embodiment provides, it is synchronous that the embodiment of the present application also provides a kind of data
Device introduces the device below in conjunction with attached drawing.
Referring to Fig. 5, which is a kind of structural schematic diagram of data synchronization unit provided by the embodiments of the present application.
Data synchronization unit 500 provided by the embodiments of the present application, such as may include: acquiring unit 510, determination unit
520 and synchronization unit 530.
It wherein, is replication relation between first memory and second memory, the first memory is divided into first
The first storage region of number, the second memory are divided into the second storage region of the first number, first storage
Region and second storage region correspond, first storage region and with first storage region corresponding second
Replication relation each other between storage region；
Acquiring unit 510, for obtaining the data modification mark of the first storage region of first number；And it obtains
Take the data modification mark of the second storage region of first number；
Determination unit 520, for the data modification mark and second storage region using first storage region
Data modification mark, determine between the data stored in the first memory and the data stored in the second memory
With the presence or absence of variance data；
Synchronization unit 530, for if it exists, processing being synchronized to the variance data, so that the first memory
The data stored in the data of middle storage and the second memory are identical.
Optionally, the determination unit 520, is specifically used for:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is calculated, and calculated result is obtained；
If the calculated result is not equal to initial value, it is determined that first storage region and/or second memory block
The data stored in domain are the variance data.
Optionally, the initial value is 0, and the data modification mark includes 1 or 0；If first storage region
Data modification is identified as 1, then it represents that the data stored in first storage region are changed, if first memory block
The data modification in domain is identified as 0, then it represents that the data stored in first storage region do not change；If described second deposits
The data modification in storage area domain is identified as 1, then it represents that and the data stored in second storage region are changed, if described
The data modification of two storage regions is identified as 0, then it represents that the data stored in second storage region do not change；
It is described that the data modification mark of first storage region and corresponding with first storage region second are deposited
The data modification mark in storage area domain is calculated, and calculated result is obtained, comprising:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is carried out or is calculated, and obtains calculated result.
Optionally, the initial value is 1, and the data modification mark includes 0 or 1；If first storage region
Data modification is identified as 0, then it represents that the data stored in first storage region are changed, if first memory block
The data modification in domain is identified as 1, then it represents that the data stored in first storage region do not change；If described second deposits
The data modification in storage area domain is identified as 0, then it represents that and the data stored in second storage region are changed, if described
The data modification of two storage regions is identified as 1, then it represents that the data stored in second storage region do not change；
It is described that the data modification mark of first storage region and corresponding with first storage region second are deposited
The data modification mark in storage area domain is calculated, and calculated result is obtained, comprising:
To the data modification mark of first storage region and the second memory block corresponding with first storage region
The data modification mark in domain is carried out and is calculated, and obtains calculated result.
Optionally, described device 500 further include:
First modification unit, for by the data modification of first storage region mark and/or second memory block
The data modification mark in domain is revised as the initial value.
Optionally, described device 500 further include:
Second modification unit, if stopping for the replication relation of the first memory and the second memory, and institute
State first memory and/or the second memory be in it is readable can write state when, if the data in first storage region
It changes, and the data modification of first storage region is identified as the initial value, then modifies first storage region
Data modification mark；And/or if the data in second storage region change, and second storage region
Data modification is identified as the initial value, then modifies the data modification mark of second storage region.
It should be noted that since the method for data synchronization that described device 500 is with above method embodiment provides is corresponding
Device can refer to the description of above method embodiment accordingly, with respect to the specific implementation of each unit of described device 500,
Details are not described herein again.
It can be seen that using data synchronization unit provided by the embodiments of the present application, since the data of the first storage region are repaired
Changing mark can characterize whether the data that the first storage region stores in first memory are changed, the second storage region
Data modification mark can characterize whether the data that the second storage region stores in second memory are changed.Therefore, may be used
It is identified with the data modification using the data modification of the first storage region mark and second storage region, determines that first deposits
The data stored in the data and second memory stored in reservoir whether there is variance data, thus further to the difference number
According to processing is synchronized, so that the data stored in first memory and the data stored in the second memory are identical.?
That is in this application, processing only is synchronized to variance data, rather than picture is in the prior art, to all numbers
According to processing is synchronized, to effectively improve the synchronous efficiency of data.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the application
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following
Claim is pointed out.
It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims
The foregoing is merely the preferred embodiments of the application, not to limit the application, it is all in spirit herein and
Within principle, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this application.
Claims (12)
1. a kind of method of data synchronization, which is characterized in that it is replication relation between first memory and second memory, described the
One memory is divided into the first storage region of the first number, and the second memory is divided into the first number second and deposits
Storage area domain, first storage region and second storage region correspond, first storage region and with described the
Replication relation each other between corresponding second storage region of one storage region；Include:
Obtain the data modification mark of the first storage region of first number；And obtain first number second
The data modification of storage region identifies；
It is identified using the data modification mark of first storage region and the data modification of second storage region, determines institute
The data stored in first memory and the data stored in the second memory are stated with the presence or absence of variance data；
If it exists, processing is synchronized to the variance data, so that the data stored in the first memory and described the
The data stored in two memories are identical.
2. the method according to claim 1, wherein the data modification mark using first storage region
Know and the data modification of second storage region identifies, determines that the data stored in the first memory and described second are deposited
The data stored in storage whether there is variance data, comprising:
To the data modification of first storage region mark and the second storage region corresponding with first storage region
Data modification mark is calculated, and calculated result is obtained；
If the calculated result is not equal to initial value, it is determined that the data and second storage stored in the first memory
The data of middle storage have differences data.
3. according to the method described in claim 2, the data modification mark includes 1 it is characterized in that, the initial value is 0
Or 0；If the data modification of first storage region is identified as 1, then it represents that the data stored in first storage region
Changed, if the data modification of first storage region is identified as 0, then it represents that stored in first storage region
Data do not change；If the data modification of second storage region is identified as 1, then it represents that deposited in second storage region
The data of storage are changed, if the data modification of second storage region is identified as 0, then it represents that second storage region
The data of middle storage do not change；
The data modification to first storage region identifies and the second memory block corresponding with first storage region
The data modification mark in domain is calculated, and calculated result is obtained, comprising:
To the data modification of first storage region mark and the second storage region corresponding with first storage region
Data modification mark is carried out or is calculated, and obtains calculated result.
4. according to the method described in claim 2, the data modification mark includes 0 it is characterized in that, the initial value is 1
Or 1；If the data modification of first storage region is identified as 0, then it represents that the data stored in first storage region
Changed, if the data modification of first storage region is identified as 1, then it represents that stored in first storage region
Data do not change；If the data modification of second storage region is identified as 0, then it represents that deposited in second storage region
The data of storage are changed, if the data modification of second storage region is identified as 1, then it represents that second storage region
The data of middle storage do not change；
The data modification to first storage region identifies and the second memory block corresponding with first storage region
The data modification mark in domain is calculated, and calculated result is obtained, comprising:
To the data modification of first storage region mark and the second storage region corresponding with first storage region
Data modification mark is carried out and is calculated, and obtains calculated result.
5. according to the method described in claim 2, it is characterized in that, it is described obtain calculated result after, the method also includes:
The data modification mark of the data modification mark of first storage region and/or second storage region is revised as
The initial value.
6. according to the method described in claim 2, it is characterized in that, the method also includes:
If the replication relation of the first memory and the second memory stops, and the first memory and/or described
Second memory be in it is readable can write state when, if the data in first storage region change, and described first deposits
The data modification in storage area domain is identified as the initial value, then modifies the data modification mark of first storage region；And/or
If the data in second storage region change, and the data modification of second storage region be identified as it is described initial
Value then modifies the data modification mark of second storage region.
7. a kind of data synchronization unit, which is characterized in that it is replication relation between first memory and second memory, described the
One memory is divided into the first storage region of the first number, and the second memory is divided into the first number second and deposits
Storage area domain, first storage region and second storage region correspond, first storage region and with described the
Replication relation each other between corresponding second storage region of one storage region；Include:
Acquiring unit, for obtaining the data modification mark of the first storage region of first number；And obtain described the
The data modification mark of the second storage region of one number；
Determination unit, the data for data modification mark and second storage region using first storage region are repaired
Change mark, determining whether there is between the data stored in the first memory and the data stored in the second memory
Variance data；
Synchronization unit, for if it exists, synchronizing processing to the variance data, so that stored in the first memory
The data stored in data and the second memory are identical.
8. device according to claim 7, which is characterized in that the determination unit is specifically used for:
To the data modification of first storage region mark and the second storage region corresponding with first storage region
Data modification mark is calculated, and calculated result is obtained；
If the calculated result is not equal to initial value, it is determined that the data and second storage stored in the first memory
The data of middle storage have differences data.
9. device according to claim 8, which is characterized in that the initial value is 0, and the data modification mark includes 1
Or 0；If the data modification of first storage region is identified as 1, then it represents that the data stored in first storage region
Changed, if the data modification of first storage region is identified as 0, then it represents that stored in first storage region
Data do not change；If the data modification of second storage region is identified as 1, then it represents that deposited in second storage region
The data of storage are changed, if the data modification of second storage region is identified as 0, then it represents that second storage region
The data of middle storage do not change；
The data modification to first storage region identifies and the second memory block corresponding with first storage region
The data modification mark in domain is calculated, and calculated result is obtained, comprising:
To the data modification of first storage region mark and the second storage region corresponding with first storage region
Data modification mark is carried out or is calculated, and obtains calculated result.
10. device according to claim 8, which is characterized in that the initial value is 1, and the data modification mark includes 0
Or 1；If the data modification of first storage region is identified as 0, then it represents that the data stored in first storage region
Changed, if the data modification of first storage region is identified as 1, then it represents that stored in first storage region
Data do not change；If the data modification of second storage region is identified as 0, then it represents that deposited in second storage region
The data of storage are changed, if the data modification of second storage region is identified as 1, then it represents that second storage region
The data of middle storage do not change；
The data modification to first storage region identifies and the second memory block corresponding with first storage region
The data modification mark in domain is calculated, and calculated result is obtained, comprising:
To the data modification of first storage region mark and the second storage region corresponding with first storage region
Data modification mark is carried out and is calculated, and obtains calculated result.
11. device according to claim 8, which is characterized in that described device further include:
First modification unit, for by the data modification of first storage region mark and/or second storage region
Data modification mark is revised as the initial value.
12. device according to claim 8, which is characterized in that described device further include:
Second modification unit, if stopping for the replication relation of the first memory and the second memory, and described the
One memory and/or the second memory be in it is readable can write state when, if the data in first storage region occur
Change, and the data modification of first storage region is identified as the initial value, then modifies the number of first storage region
According to modified logo；And/or if the data in second storage region change, and the data of second storage region
Modified logo is the initial value, then modifies the data modification mark of second storage region.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701303A (en) * | 2002-11-29 | 2005-11-23 | 国际商业机器公司 | Remote copy synchronization in disaster recovery computer systems |
| CN101211288A (en) * | 2006-12-28 | 2008-07-02 | 株式会社日立制作所 | Storage system comprising backup function |
| CN102279857A (en) * | 2010-06-11 | 2011-12-14 | 阿里巴巴集团控股有限公司 | Method and system for realizing data reproduction |
| CN103793271A (en) * | 2012-10-29 | 2014-05-14 | 国际商业机器公司 | Methods and systems for switching between mirrored volumes |
| CN105045541A (en) * | 2015-09-11 | 2015-11-11 | 浪潮(北京)电子信息产业有限公司 | Increment snapshot method and apparatus |
| CN105630413A (en) * | 2015-12-23 | 2016-06-01 | 中国科学院深圳先进技术研究院 | Synchronized writeback method for disk data |
| US20180203623A1 (en) * | 2017-01-19 | 2018-07-19 | Canon Kabushiki Kaisha | Information processing apparatus, method of controlling the same and storage medium |
-
2018
- 2018-08-16 CN CN201810934585.2A patent/CN109144418A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701303A (en) * | 2002-11-29 | 2005-11-23 | 国际商业机器公司 | Remote copy synchronization in disaster recovery computer systems |
| CN101211288A (en) * | 2006-12-28 | 2008-07-02 | 株式会社日立制作所 | Storage system comprising backup function |
| CN102279857A (en) * | 2010-06-11 | 2011-12-14 | 阿里巴巴集团控股有限公司 | Method and system for realizing data reproduction |
| CN103793271A (en) * | 2012-10-29 | 2014-05-14 | 国际商业机器公司 | Methods and systems for switching between mirrored volumes |
| CN105045541A (en) * | 2015-09-11 | 2015-11-11 | 浪潮(北京)电子信息产业有限公司 | Increment snapshot method and apparatus |
| CN105630413A (en) * | 2015-12-23 | 2016-06-01 | 中国科学院深圳先进技术研究院 | Synchronized writeback method for disk data |
| US20180203623A1 (en) * | 2017-01-19 | 2018-07-19 | Canon Kabushiki Kaisha | Information processing apparatus, method of controlling the same and storage medium |
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