CN103870362B - A kind of data reconstruction method, device and standby system - Google Patents
A kind of data reconstruction method, device and standby system Download PDFInfo
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- CN103870362B CN103870362B CN201410109548.XA CN201410109548A CN103870362B CN 103870362 B CN103870362 B CN 103870362B CN 201410109548 A CN201410109548 A CN 201410109548A CN 103870362 B CN103870362 B CN 103870362B
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Abstract
The embodiment of the invention discloses data reconstruction method, device and standby system, applied to technical field of information processing.The Data Recapture Unit of the present embodiment is when carrying out data recovery, second data block in the main current newest second edition by judgement, it is whether consistent with the first data block of correspondence position in first version, so as to know which data block is updated, which need to recover data block, without to target disk in main frame or storage device, or all data blocks stored on the virtual machine of main frame are recovered, allow to reduce the data recovered during data recovery, and then reduce the time of data recovery；Backup server need not transmit the data block of whole disk between main frame or storage device simultaneously, it is not required that all data blocks stored between main frame on transfer of virtual machine, reduce the data volume transmitted between the backup server of the present embodiment and main frame.
Description
Technical field
The present invention relates to technical field of information processing, more particularly to data reconstruction method, device and standby system.
Background technology
Standby system is the function system with backup-and-restore, is primarily used to the data in backup production main frame, such as
Loss of data in fruit main frame is, it is necessary to carry out data recovery so that the state that main frame is returned to before not losing data.Typically
By data are extracted from standby system in the backup set of a certain version in standby system, then all it is written in main frame,
To realize the purpose of data recovery.
, it is necessary to do the overall recovery of disk in existing data recovery procedure, i.e., by the total data in target disk
Re-write on former disk, will so have in storage of the substantial amounts of data by network transmission to main frame so that need flower
The expense long period could realize the process of data recovery.
The content of the invention
The embodiment of the present invention provides data reconstruction method, device and standby system, reduces the number recovered during data recovery
According to.
First aspect of the embodiment of the present invention provides a kind of data reconstruction method, including：
Data recovery request is received, the data recovery request includes the data version information for asking to recover；
If right in a certain second data block in the current second edition, first version corresponding with the data version information
Answer the first data block of position inconsistent, then the positional information of first data block and first data block is sent to master
Machine or storage device, to cause the main frame or storage device to replace position described in the second edition with first data block
Confidence ceases the second data block of indicated position to carry out data recovery.
It is described by first data block and described in the first possible implementation of first aspect of the embodiment of the present invention
The positional information of first data block is sent to before main frame, in addition to：
The corresponding data fingerprint of the first data block is obtained in data version information correspondence first version respectively and current
The second edition in the corresponding data fingerprint of the second data block；
If the corresponding data fingerprint of a certain second data block in the second edition, with correspondence position in first version
The corresponding data fingerprint of first data block is inconsistent, then a certain second data block in the current second edition, with the number
The first data block according to correspondence position in version information correspondence first version is inconsistent.
With reference to the first possible implementation of first aspect of the embodiment of the present invention, in first aspect of the embodiment of the present invention
In second of possible implementation, before the reception data recovery request, in addition to：
Obtain data block to be backed up, and the data block to be backed up data fingerprint；
The data block to be backed up is stored into the first version data block, and stores each number in the first version
According to the index information of block, the index information includes position and the data fingerprint of the data block to be backed up.
With reference to second of possible implementation of first aspect of the embodiment of the present invention, in first aspect of the embodiment of the present invention
In the third possible implementation：
If a certain first data block is corresponding with the third edition sheet stored in backup server in the first version
3rd data block of position is identical, then described the data block to be backed up is stored into the first version data block specifically to wrap
Include：The first redirection information of a certain first data block is stored, first redirection information is used for the first edition
A certain first data block is redirected to the 3rd data block of correspondence position in the third edition sheet in this；And/or,
If a certain first data block is corresponding with the third edition sheet stored in backup server in the first version
3rd data block of position is identical, then the index information of a certain first data block of the storage first version is specifically wrapped
Include：Store the second redirection information of the index information of a certain first data block described in the first version, second weight
Directed information is right in the third edition sheet for the index information of a certain first data block in the first version to be redirected to
Answer the index information of the 3rd data block of position.
Second aspect of the embodiment of the present invention provides a kind of data reconstruction method, including：
Data recovery request is sent to backup server, the data recovery request includes the data version for asking to recover
This information；
The positional information of the first data block that the backup server sends and first data block is received, with described the
One data block replaces the second data block of position indicated by institute's positional information in the current second edition to carry out data recovery；
Wherein, the positional information of first data block and the first data block is a certain second number in the second edition
According to block, the first data block of correspondence position in first version corresponding with the data version information that the data recovery request includes
When inconsistent, sent by the backup server.
In the first possible implementation of second aspect of the embodiment of the present invention, the transmission data recovery request is to backup
Before server, in addition to：
Data to be backed up are divided into data block to be backed up according to predetermined size, and calculate the data block to be backed up
Data fingerprint；
The data fingerprint of the calculating and the data block to be backed up are sent to the backup server, it is described to cause
The data block to be backed up is stored into the first version data block by backup server, and stores each in the first version
The index information of data block, the index information includes position and the data fingerprint of the data block to be backed up.
The third aspect of the embodiment of the present invention provides a kind of Data Recapture Unit, including：
Request reception unit, for receiving data recovery request, the data recovery request includes asking what is recovered
Data version information；
Transmitting element, if for a certain second data block in the current second edition, connect with the request reception unit
The first data block of correspondence position is inconsistent in data version information correspondence first version in the data recovery request of receipts, then will
The positional information of first data block and first data block is sent to main frame or storage device, with cause the main frame or
Storage device replaces the second data block of position indicated by positional information described in the second edition with first data block
To carry out data recovery.
In the first possible implementation of the third aspect of the embodiment of the present invention, described device also includes：
Fingerprint acquiring unit, for obtaining the number that the data recovery request that the request reception unit is received includes respectively
According to the second data block in the corresponding data fingerprint of the first data block in version information correspondence first version and the current second edition
Corresponding data fingerprint；
The transmitting element, if a certain second data in the second edition obtained specifically for the fingerprint acquiring unit
The corresponding data fingerprint of block, data fingerprint corresponding with the first data block of correspondence position in first version is inconsistent, then by institute
The positional information for stating the first data block and first data block is sent to main frame or storage device.
With reference to the first possible implementation of the third aspect of the embodiment of the present invention, in the third aspect of the embodiment of the present invention
In second of possible implementation, described device also includes：
Acquiring unit to be backed up, for obtaining data block to be backed up, and the data block to be backed up data fingerprint；
Storage element, the data block to be backed up for the acquiring unit to be backed up to be obtained stores into the first version
Data block, and the index information of each data block in the first version is stored, the index information includes described to be backed up
The position of data block and data fingerprint.
With reference to second of possible implementation of the third aspect of the embodiment of the present invention, in the third aspect of the embodiment of the present invention
In the third possible implementation：
The storage element, if specifically in a certain first data block in the first version and the storage element
The 3rd data block of correspondence position is identical in the third edition sheet stored, then store a certain first data block first resets
To information, first redirection information is used to a certain first data block in the first version being redirected to the third edition
3rd data block of correspondence position in this；And/or,
If specifically for the third edition sheet stored in a certain first data block in the first version and storage element
3rd data block of middle correspondence position is identical, then stores the index information of a certain first data block described in the first version
Second redirection information, second redirection information is used for the index information of a certain first data block in the first version
It is redirected to the index information of the 3rd data block of correspondence position in the third edition sheet.
Fourth aspect of the embodiment of the present invention provides a kind of Data Recapture Unit, including：
Request transmitting unit, for sending data recovery request to backup server, the data recovery request includes
Ask the data version information recovered；
Recovery unit is received, for receiving the first data block that the backup server sends and first data block
Positional information, the second data block of position indicated by institute's positional information in the current second edition is replaced with first data block
To carry out data recovery；
Wherein, the positional information of first data block and the first data block is a certain second number in the second edition
According to block, the first data block of correspondence position in first version corresponding with the data version information that the data recovery request includes
When inconsistent, sent by the backup server.
In a kind of possible implementation of fourth aspect of the embodiment of the present invention, described device also includes：
Fingerprint calculation unit, for data to be backed up to be divided into data block to be backed up according to predetermined size, and is counted
Calculate the data fingerprint of the data block to be backed up；
Backup transmitting element, for the data fingerprint of the calculating and the data block to be backed up to be sent into the backup
Server, to cause the backup server that the data block to be backed up is stored into the first version data block, and is stored
The index information of each data block in the first version, the index information include the data block to be backed up position and
Data fingerprint.
The aspect of the embodiment of the present invention the 5th provides a kind of standby system, it is characterised in that including backup server and at least
One main frame；
The backup server is as the third aspect of the embodiment of the present invention, or the first of the third aspect are possible to the third
Data Recapture Unit in implementation described in any possible implementation, the main frame be fourth aspect of the embodiment of the present invention or
Data Recapture Unit described in a kind of possible implementation of fourth aspect.
The aspect of the embodiment of the present invention the 6th provides a kind of standby system, it is characterised in that including backup server and at least
One storage device；
The backup server is as the third aspect of the embodiment of the present invention, or the first of the third aspect are possible to the third
Data Recapture Unit in implementation described in any possible implementation.
It can be seen that, the backup server of the embodiment of the present invention can travel through all second data in the current second edition
Block, judges whether the second data block is consistent with the first data block of correspondence position in first version, so as to know needs pair
Which data block is recovered, without to target disk in main frame or storage device, or main frame virtual machine storage it is complete
Portion's data block is recovered so that can reduce the data recovered during data recovery, reduces the time of data recovery；Not simultaneously
Need in backup server and main frame（Or storage device）Between transmit the data block of whole disk, it is not required that in backup services
All data blocks in the virtual machine included by main frame are transmitted between device and main frame, backup server and main frame is reduced（Or deposit
Store up equipment）Between the data volume transmitted.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 a to Fig. 1 c are the structural representations of the standby system that data reconstruction method is applied in the embodiment of the present invention；
Fig. 2 is a kind of flow chart for data reconstruction method that backup server side provided in an embodiment of the present invention is performed；
Fig. 3 is the flow chart for another data reconstruction method that backup server side provided in an embodiment of the present invention is performed；
Fig. 4 is a kind of flow chart of data reconstruction method performed by main frame provided in an embodiment of the present invention；
Fig. 5 is the flow chart of another data reconstruction method performed by main frame provided in an embodiment of the present invention；
Fig. 6 a are the schematic diagrames of backup server data block in the backup host of moment 1 in the embodiment of the present invention；
Fig. 6 b are the schematic diagrames of backup server data block in the backup host of moment 2 in the embodiment of the present invention；
Fig. 6 c are another schematic diagrames of backup server data block in the backup host of moment 2 in the embodiment of the present invention；
Fig. 6 d are another schematic diagrames of backup server data block in the backup host of moment 2 in the embodiment of the present invention；
Fig. 7 is the schematic diagram of main frame recovery data in the embodiment of the present invention；
Fig. 8 is a kind of structural representation of Data Recapture Unit provided in an embodiment of the present invention；
Fig. 9 is the structural representation of another Data Recapture Unit provided in an embodiment of the present invention；
Figure 10 is a kind of structural representation of backup server provided in an embodiment of the present invention；
Figure 11 is the structural representation of another Data Recapture Unit provided in an embodiment of the present invention；
Figure 12 is a kind of structural representation of main frame provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " " in description and claims of this specification and above-mentioned accompanying drawing
Four " etc.（If there is）It is for distinguishing similar object, without for describing specific order or precedence.It should manage
The data that solution is so used can be exchanged in the appropriate case, so as to embodiments of the invention described herein if with except
Order beyond those for illustrating or describing herein is implemented.In addition, term " comprising " and " having " and their any change
Shape, it is intended that covering including not exclusively, for example, containing the process of series of steps or unit, method, system, product
Or equipment is not necessarily limited to those steps or the unit clearly listed, but may include not list clearly or for these
The intrinsic other steps of process, method, product or equipment or unit.
The embodiment of the present invention provides a kind of data reconstruction method, mainly can apply to the backup as shown in Fig. 1 a to Fig. 1 c
In system, include backup server and multiple main frames in the standby system shown in Fig. 1 a, wherein, each main frame respectively with backup
Network service connection is carried out between server, backup server is mainly used in backup host the data on disk；In main frame
Backup client can be run, user can initiate the flow of data backup by the backup client to backup server, and
The flow of data recovery.In another case, backup client can not be run in main frame, but including multiple virtual
Machine, then backup server can back up the data on each virtual machine.
Include backup server and multiple storage devices in standby system as shown in Figure 1 b, such backup server is just
It need not use and network transmission is carried out between main frame, and be simply transmitted in accumulation layer and storage device, by backup services
Device is actively backed up to the data block in storage device.In this case, it is necessary on a storage device provide with server it
Between interface.
Include backup server, at least one storage device and backup storage in standby system as illustrated in figure 1 c, its
Middle storage device and backup storage are all connected to backup server, and backup server is used to control backup storage to connect by accumulation layer
Receive the data of storage device transmission and backed up.
The method of the present embodiment is the method performed by the backup server in standby system, flow chart as shown in Fig. 2 bag
Include：
Step 101, data recovery request is received, the versions of data letter for including asking to recover in data recovery request
Breath, data version information is typically identified using the time here, such as the data at a certain moment etc.；It can also be marked with numbering
Know, such as the data obtained each moment are numbered in sequence, then the data at some moment（The number of one version
According to）Just identified with a numbering.
It is appreciated that backup server can be periodically or non-periodically to main frame or storage device active obtaining data and standby
Part, or passively receiving the data that backup client is sent in main frame is backed up, and due to being stored up in main frame or storage device
The data deposited can be continually changing, and such backup server will be different in the data not obtained in the same time, and at a time standby
The data of part server backup are the data of a version.
In the case of as shown in Figure 1a, user can initiate data recovery by the backup client run in main frame
Flow so that backup client to backup server send data recovery request, or user by operate backup server come
Initiate to carry out Data Recovery Process to the virtual machine of main frame；And in the case of as shown in fig. 1b and fig. lc, user can pass through
Operate backup server to initiate Data Recovery Process, the data in storage device are recovered.The data recovery request is used
The data of some version of backup server backup are returned to main frame or storage device in request backup server, in data
Which it can specifically include needing to recover the information of data at moment etc., i.e., above-mentioned data version information in recovery request.
Step 102, to a certain second data block in the current second edition, judge in the current second edition this second
Whether the first data block of correspondence position is consistent in data block, first version corresponding with above-mentioned data version information, if differed
Cause, illustrate that the data block of corresponding position in main frame is changed, it is necessary to be recovered, then backup server can perform step
103；If consistent, to another second data block in the second edition, return and perform step 103.
Wherein, in the case of as illustrated in figs. 1A and ib, the second data block of the current second edition refers to backup clothes
The data block being engaged on the target disk or virtual machine of the newest backup of device, in the case of as illustrated in figure 1 c, the current second edition
The second data block refer to backup storage in newest backup target disk on data block；And correspondence in above-mentioned first version
Position refers to the position consistent with the second data block in the second edition, such as is at the positions such as start or end.
In the present embodiment, backup server, when carrying out data backup, is the target disk by main frame or storage device,
Or the data that the virtual machine in main frame is at a time stored are divided into what multiple data blocks were backed up according to preset size, and
When backing up each data block, it is necessary to store the data fingerprint of each data block, wherein the data fingerprint can be with unique mark
One data block, data block can specifically be carried out certain calculate and obtain the data fingerprint, such as calculate data block by Hash
After method verification, the cryptographic Hash for being capable of the unique mark data block of generation, then the cryptographic Hash is data fingerprint.
In the present embodiment, the corresponding data of the first data block in data version information correspondence first version can be obtained respectively
The corresponding data fingerprint of second data block in fingerprint and the current second edition, then by the first data in the first version of acquisition
The data fingerprint of block, is compared with the data fingerprint of the second data block in the second edition, if a certain second in the second edition
The corresponding data fingerprint of data block data fingerprint corresponding with the first data block of correspondence position in first version is inconsistent, then when
First data block of correspondence position in a certain second data block in the preceding second edition, first version corresponding with data version information
It is inconsistent.Herein can by backup server after the data of main frame or storage device are got, to calculate data fingerprint, or
It is the data fingerprint calculated that direct Receiving Host is sent.
Wherein, the data block in each version is divided according to same rule, such as is all according to preset big
Small division, the number for the data block that so each version includes is the same.
It should be noted that above-mentioned first data block and the second data block are not offered as the data block with ordinal relation,
In the present embodiment, the data block that the data block in first version is referred to as in the first data block, the second edition is referred to as second
Data block, " first " and " second " here is that, in order to illustrate the data block in different editions, and the rest may be inferred.
Step 103, by the first data block and the positional information of the first data block in the first version be sent to main frame or
Storage device, to cause the main frame or storage device to replace position indicated by the positional information in the second edition with first data block
Second data block at the place of putting is to carry out data recovery.
The positional information of one of data block can be used to refer to the data block in main frame or the target magnetic of storage device
Disk, or indicate position of the data block in the virtual machine included by main frame, typically to represent using the numbering of data block, then should
The position of data block is the numbering of the data block and the product of data block size.And it should be noted that performing above-mentioned steps
When 102 and 103, it can work as it is determined that when the data fingerprint of some data block is inconsistent, the data block just is sent into master at once
Machine or storage device；Or it is to determine the second edition all data blocks inconsistent with the data fingerprint of data block in first version
Afterwards, then by these all first inconsistent data blocks main frame or storage device are sent to.
It can be seen that, by step 102 and 103 circulate operation, all second numbers in the current second edition can be traveled through
According to block, judge whether the second data block is consistent with the first data block of correspondence position in first version, so as to know needs
Which data block is recovered, without to target disk in main frame or storage device, or main frame virtual machine storage
All data blocks are recovered so that can reduce the data recovered during data recovery, reduce the time of data recovery；Simultaneously
Need not be in backup server and main frame（Or storage device）Between transmit the data block of whole disk, it is not required that in backup clothes
All data blocks being engaged in the virtual machine between device and main frame included by transmission main frame, reduce backup server and main frame（Or
Storage device）Between the data volume transmitted.
It should be noted that above-mentioned steps 101 to 103 are when backup server side performed in data recovery procedure
Method, this is accomplished by the step of backup server performs data backup before above-mentioned steps 101, so as to follow-up data recovery mistake
Journey, specifically, backup server data backup, flow chart can be implemented by the following steps as shown in figure 3, including：
Step 105, obtain data block to be backed up, and data block to be backed up data fingerprint.Here the number to be backed up obtained
Refer to according to block at some moment, the target disk of main frame or storage device, or the data stored in the virtual machine of main frame are divided
Obtained all data blocks, and these data blocks divide according to presetting rule, one data fingerprint of each data block correspondence.
Step 106, the data block to be backed up obtained in step 105 is stored into first version data block, number can also be used
It is that the first version data block is identified according to version information for which version, such as identifies the first version with time or numbering
Data block；And the index information of the data block of each in first version is stored, the index information includes the position of data block to be backed up
Put and data fingerprint, if wherein the data block in each version is divided according to identical size of data, a version
Position of some data block can represent that the position of so data block is data block with the numbering of the data block in this
Numbering and size of data product.
Wherein, if in first version a certain first data block with it is right in the third edition sheet stored in the backup server
Answer the 3rd data block of position identical, in order to which without repeating storage identical information, first data block is being stored into first
During the first data block of some in version, the first redirection information of first data block can be stored, the first redirection letter
Cease the 3rd data block for the data block of this in first version first to be redirected to correspondence position in third edition sheet.
Further, when storing the index information of first data block, this in first version first can specifically be stored
Second redirection information of the index information of data block, second redirection information is used for the data block of this in first version first
Index information be redirected to correspondence position in third edition sheet the 3rd data block index information.
So just can be by any one moment main frame or the target disk of storage device by above-mentioned steps 105 and 106
The data of upper storage, store into an edition data block.
It should be noted that during if under scene as illustrated in figure 1 c, backup server is specifically treating acquisition
Backup Data block is stored into backup storage, and stores into first version data block.
The embodiment of the present invention also provides another data reconstruction method, mainly can apply to backup system as shown in Figure 1a
In system, the method for the present embodiment be as the method performed by the main frame in standby system, flow chart as shown in figure 4, including：
Step 201, data recovery request is sent to backup server, and the data recovery request includes asking what is recovered
Data version information, data version information can be the information at some moment here, can also the information such as start context.
It is appreciated that user can operate the backup client run in main frame, to initiate the flow of data recovery, then use
Family can select the data for recovering some moment to be recovered；Or in the environment of main frame is virtualization, work as Host Detection
To some virtual machines loss of data when, can actively initiate the flow of data recovery, and according to before preset tactful recovery certain
The data at one moment.So after backup server is receiving data recovery request, it is possible to arrived according to above-mentioned steps 101
103 perform Data Recovery Process, and the positional information for needing the data block and data block recovered is sent into main frame, do not enter herein
Row is repeated.
Step 202, the first data block of backup server transmission and the positional information of the first data block are received, with the first number
The second data block in the current second edition indicated by positional information at position is replaced according to block to carry out data recovery.
Wherein, the positional information of first data block and the first data block is a certain edition data block in the second edition,
The number of first data block of correspondence position in first version corresponding with the data version information that the data recovery request includes
According to fingerprint it is inconsistent when, sent by the backup server.Here the first data block and the second data block are not offered as having
In the data block of ordinal relation, the present embodiment, the data block in first version is referred to as in the first data block, the second edition
Data block is referred to as the second data block, and " first " and " second " here is to illustrate the data block in different editions.
It can be seen that, in the data reconstruction method in the present embodiment, when main frame initiates Data Recovery Process, by backup server
The positional information of the first data block changed and the first data block is returned into main frame, allows main frame to recover these the first data
Block, without recovering to all data blocks stored on target disk in main frame or virtual machine so that number can be reduced
According to the data recovered when recovering, and then reduce the time of data recovery；Without the need between backup server and main frame
All data stored in the data block or virtual machine of whole disk are transmitted, reduce what is transmitted between backup server and main frame
Data volume.
It should be noted that above-mentioned steps 201 to 202 are the methods performed by main frame in data recovery procedure, and
Before data recovery, main frame can carry out data backup by the steps, with reference to figure as shown in figure 5, including：
Step 203, data to be backed up are divided into multiple data blocks to be backed up according to predetermined size, and calculating treats standby
The data fingerprint of part data block, specifically carrying out certain calculate to each data block to be backed up respectively obtains data fingerprint.Its
In, because the data stored in the target disk or virtual machine of main frame are continually changing, and main frame needs when obtaining data
For a period of time, then for the uniformity of the data of realizing acquisition, main frame can be obtained data, i.e. main frame in the form of snapshot and be given birth to
Into purpose disk snapshot or target volume shadow copy or virtual machine snapshot, the pair of data in target disk or target volume is mainly obtained
Sheet, or virtual machine store the copy of data.
Step 204, the data fingerprint calculated in step 203 and data block to be backed up are sent to backup server, so
Backup server can carry out data backup, i.e. backup server according to above-mentioned steps 105 and 106 and store data block to be backed up
Into first version data block, and the index information of the data block of each in first version is stored, index information includes number to be backed up
Position and data fingerprint according to block, the position of data block to be backed up can be the volume of data block to be backed up wherein in index information
Number, the position of the data block to be backed up, as numbering and the product of data block size are so just can know that according to numbering.
The number in the data reconstruction method of the embodiment of the present invention, the present embodiment is illustrated with a specific embodiment below
It is applied to according to restoration methods in standby system as shown in Figure 1a, operation has backup client in main frame, specifically：
First, when carrying out data backup
（1）User initiates the backup flow to data on the target disk of moment 1 by the backup client run in main frame,
Then the data stored in target disk can be divided into multiple data blocks by main frame according to preset size, specifically can be such as Fig. 6 a institutes
Show, the data in target disk are divided into 5*7 data block（A dotted line frame in Fig. 6 a is a data block）；Then calculate
Target disk each data block at moment 1 data fingerprint, and by each data block and each number of the target disk of moment 1
Backup server is transferred to according to the corresponding data fingerprint of block to be backed up.
Backup server can store into each data block on the target disk of moment 1 data block of version 1, and backup services
Device will also store the corresponding index information of each data block, include the data fingerprint and positional information of data block in index information
The such as information such as numbering.
（2）The data stored on target disk are being continually changing, and the backup client run in main frame can be according to preset
Strategy initiate the target disk of moment 2 on data backup flow, then backup client obtain the target disk of moment 2 each number
After block and the data fingerprint of each data block, backup server is sent to.
With reference to shown in Fig. 6 b and 6c, due between moment 1 to the moment 2, except the position of data block 1 and 2 on target disk
Data block outside, the data block of other positions does not all change, then backup server is by each number of the target disk of moment 2
When storing into version 2 data block according to block, the data block of the position of data block 1 and 2 after change can be stored, and stores other data blocks
Redirection information, these data blocks are redirected to the data block of correspondence position in version 1 respectively；Store simultaneously after change
The index information of data block 1 and 2, and the redirection information of the index information of other data blocks is stored, by the rope of other data blocks
Fuse ceases the index information for being redirected to the data block of correspondence position in version 1.So when storing version 2 data block, so that it may
With without repeating storage identical information.
Wherein, the numbering and data fingerprint of the data block can be included in the index information of some data block, data are used
The numbering of block indicates the position of data block, specially data block piecemeal size（Preset value）× data block is numbered.For example,
Assuming that target disk is carried out into piecemeal according to 4MB, data block is from 0 open numbering, then the position of data block is on first position
Initial address is 0 position；The numbering of data block is 1 on second position, then the position of data block is on second position
Beginning address be 4*1 position, if the logic addressed block of first data block（Logical Block Addressing, LBA）
For 0~（4*1024*1024-1）, then second data block is just since 4*1024*1024, i.e., and 4194304.
（3）The data stored on target disk are being continually changing, and the backup client run in main frame can be according to preset
Strategy initiate the target disk of moment 3 on data backup flow, then backup client obtain the target disk of moment 3 each number
After block and the data fingerprint of each data block, backup server is sent to.
With reference to shown in Fig. 6 d, due between moment 2 to the moment 3, on target disk in addition to the position of data block 2 and 3,
The data block of other positions does not all change, then each data block of the target disk of moment 3 is being stored into version by backup server
During this 3 data block, the data block on the position of data block 2 and 3 after change can be stored, and store the redirection information of data block 1,
Data block 1 is redirected to the data block of correspondence position in version 1, and the redirection information of storage other positions data block, will
These data blocks are redirected to the data block of correspondence position in version 2 respectively；The rope of the data block 2 and 3 after change is stored simultaneously
Fuse is ceased, and stores the redirection information of data block 1, and the index information of data block 1 is redirected into correspondence position in version 1
The index information of data block, and the redirection information of the index information of storage other positions data block, by the rope of other data blocks
Fuse ceases the index information for being redirected to the data block of correspondence position in version 2.
2nd, when carrying out data recovery
The backup client that user is run by operating in main frame, initiates the flow of data recovery, it is desirable to backup server
Recover the data on the target disk of the main frame of moment 2, backup client can send data recovery request to backup server.
With reference to shown in Fig. 7, backup server can obtain each data block in the edition 4 of the host object disk of newest backup
Data fingerprint, and in the version 2 at moment 2 each data block data fingerprint, by the data fingerprint and version of edition 4 data block
The data fingerprint of 2 data blocks is compared, and show that the data block in only data block 2,3,4 and 5 positions is inconsistent, then by version
Data block in 2 on the position of data block 2 to 5, and the position of these data blocks are sent to main frame；The backup client of main frame operation
According to the position of the data block of reception, it will can be replaced when the data block 2 to 5 in front disk with the data block 2 to 5 received, with reality
Existing data recovery.
It can be seen that, it can be realized by the backup and recovery of above-mentioned data：
1st, in data recovery, the differentiated data block of tool can be transmitted between backup server and main frame, and by leading
Machine is recovered, and without transmitting the data block on whole disk, improves the data recovering efficiency of standby system.
2nd, take and decline for the bandwidth resources between backup server and main frame, leaving bandwidth resources for other business makes
With reducing the influence to other business.
3rd, main frame is in data recovery, is only written in disk and carries out data recovery the differentiated data block of tool, reduces
The initiation number of times transmitted to disk read-write, reduction disk loss is made while reducing the disk unit in recovery process and damaging
Into secondary damage.
The embodiment of the present invention provides a kind of Data Recapture Unit, mainly above-mentioned backup server, the present embodiment its
Structural representation as shown in figure 8, including：
Request reception unit 10, for receiving data recovery request, the data recovery request includes asking to recover
Data version information；
Transmitting element 12, if for a certain second data block in the current second edition, with the request reception unit
The first data block of correspondence position is inconsistent in data version information correspondence first version in 10 data recovery requests received,
The positional information of first data block and first data block is then sent to main frame or storage device, to cause the master
Machine or storage device replace the second number of position indicated by positional information described in the second edition with first data block
According to block to carry out data recovery.
It can be seen that, when the Data Recapture Unit of the present embodiment is carrying out data recovery, if certain in the current second edition
One second data block, the first data block with correspondence position in first version is inconsistent, so as to know which data block more
New to cross, it is necessary to recover to which data block, without to target disk in main frame or storage device, or main frame is virtual
The all data blocks stored on machine are recovered so that can reduce the data recovered during data recovery, further reduce
The time of data recovery；Transmitting element 12 need not transmit the data block of whole disk between main frame or storage device simultaneously,
Also without all data blocks stored with main frame transfer of virtual machine, reduce the present embodiment Data Recapture Unit and main frame it
Between the data volume transmitted.
With reference to shown in Fig. 9, in a specific embodiment, Data Recapture Unit is except that can include the knot shown in Fig. 8
Outside structure, fingerprint acquiring unit 11, acquiring unit to be backed up 13 and storage element 14 can also be included, wherein：
Fingerprint acquiring unit 11, includes for obtaining the data recovery request that the request reception unit 10 is received respectively
Data version information correspondence first version in the second number in the corresponding data fingerprint of the first data block and the current second edition
According to the corresponding data fingerprint of block；
Acquiring unit 13 to be backed up, for obtaining data block to be backed up, and the data block to be backed up data fingerprint；Should
Acquiring unit 13 to be backed up can be obtained from main frame or storage device.
Storage element 14, the data block to be backed up for the acquiring unit 13 to be backed up to be obtained stores into described first
Edition data block, and the index information of each data block in the first version is stored, the index information includes described treat
The position of Backup Data block and data fingerprint.
Wherein, storage element 14, if specifically for a certain first data block in the first version and the data recovery
The 3rd data block of correspondence position is identical in the third edition sheet that storage element 14 has been stored in device, then stores described a certain first
First redirection information of data block, first redirection information is used for a certain first data block weight in the first version
It is directed to the 3rd data block of correspondence position in the third edition sheet；And/or, if specifically for a certain in the first version
3rd data block of correspondence position in the third edition sheet that first data block has been stored with storage element 14 in the Data Recapture Unit
Identical, then the index information of storage a certain first data block of first version is specifically included：Store the first version
Described in a certain first data block index information the second redirection information, second redirection information is used for described the
The index information of a certain first data block is redirected to the 3rd data block of correspondence position in the third edition sheet in one version
Index information.
In the present embodiment, after fingerprint acquiring unit 11 obtains data fingerprint, transmitting element 12, if specifically for described
The corresponding data fingerprint of a certain second data block, position corresponding with first version in the second edition that fingerprint acquiring unit 11 is obtained
The corresponding data fingerprint of the first data block put is inconsistent, then believes the position of first data block and first data block
Breath is sent to main frame or storage device.And will can just be appointed by acquiring unit 13 to be backed up and storage element 14 in the present embodiment
On one moment main frame of meaning or the target disk of storage device, or the data stored on the virtual machine of main frame, store into a version
Notebook data block.
A kind of backup server is also provided in the present embodiment, structural representation as shown in Figure 10, including is connected respectively to total
Processor 21, emitter 22 and receiver 23 on line, and can also include being connected to memory 24 in bus, wherein：
It is used for storing the data received from receiver 23 in memory 24, and the processing data of processor 21 can also be stored
The information such as necessary file；Emitter 22 and receiver 23 are the ports that backup server communicates with miscellaneous equipment.
Receiver 23 is used to receive data recovery request, and the data recovery request includes the data version for asking to recover
This information；Processor 21 is used for a certain second data block, first with correspondence position in first version in the current second edition
Data block is inconsistent, then emitter 22 is used to the positional information of first data block and first data block being sent to master
Machine or storage device, to cause the main frame or storage device to replace position described in the second edition with first data block
Confidence ceases the second data block of indicated position to carry out data recovery.Wherein, processor 21 can specifically obtain receiver 23
The corresponding data fingerprint of first data block in the data version information correspondence first version that the data recovery request of reception includes
And the corresponding data fingerprint of the second data block in the current second edition, if a certain second data block is corresponding in the second edition
Data fingerprint, data fingerprint corresponding with the first data block of correspondence position in first version is inconsistent, then certain in the second edition
One second data block, the first data block with correspondence position in first version is inconsistent.
So processor 21 it is known which data block is updated, it is necessary to recover to which data block, without
Need to recover all data blocks stored on target disk, or the virtual machine of main frame in main frame or storage device so that
The data recovered during data recovery can be reduced, the time of data recovery is further reduced；Emitter 22 need not simultaneously
The data block of whole disk is transmitted between main frame or storage device, it is not required that emitter 22 is stored with main frame transfer of virtual machine
All data blocks, reduce the data volume transmitted between the backup server of the present embodiment and main frame.
Further, processor 21 is additionally operable to obtain data block to be backed up, and the data block to be backed up data fingerprint；
The data block to be backed up that the processor 21 is obtained is stored into the first version data block by the memory 24, and stores institute
The index information of the data block of each in first version is stated, the index information includes the position sum of the data block to be backed up
According to fingerprint.
Wherein, if the memory 24 specifically for the first version it is a certain in the first data block and the memory 24
The 3rd data block of correspondence position is identical in the third edition sheet of storage, then store a certain first data block first redirects
Information, first redirection information is used to a certain first data block in the first version being redirected to the third edition sheet
3rd data block of middle correspondence position；And/or, if specifically for a certain first data block in the first version and the storage
The 3rd data block of correspondence position is identical in the third edition sheet that device 24 has been stored, then the storage first version a certain first
The index information of data block is specifically included：Store second of the index information of a certain first data block described in the first version
Redirection information, second redirection information is used to reset the index information of a certain first data block in the first version
To the index information of the 3rd data block of correspondence position into the third edition sheet.
So just can be by any one moment main frame or the target magnetic of storage device by processor 21 and memory 24
The data stored on disk, or the virtual machine of main frame, store into an edition data block.
A kind of Data Recapture Unit is also provided in the present embodiment, i.e., above-mentioned main frame, its structural representation is as shown in figure 11,
Including：
Request transmitting unit 30, for sending data recovery request to backup server, is wrapped in the data recovery request
Include the data version information for asking to recover；
Recovery unit 31 is received, for receiving the first data block and first data block that the backup server is sent
Positional information, the second data of position indicated by institute's positional information in the current second edition are replaced with first data block
Block is to carry out data recovery；
Wherein, the positional information of first data block and the first data block is a certain second number in the second edition
According to block, the first data block of correspondence position in first version corresponding with the data version information that the data recovery request includes
When inconsistent, sent by the backup server.
In the Data Recapture Unit of the present embodiment, when initiating Data Recovery Process, it will be changed by backup server
The first data block and the first data block positional information return to reception recovery unit 31, allow Data Recapture Unit to recover these
Data block, the data without being stored on the target disk or virtual machine to the Data Recapture Unit are recovered so that can
The data recovered with reducing during data recovery, further reduce the time of data recovery；Without the need in backup services
All data blocks in the data block or transfer of virtual machine of whole disk are transmitted between device and the Data Recapture Unit, are reduced standby
The data volume transmitted between part server and Data Recapture Unit.
Further, Data Recapture Unit can also include fingerprint calculation unit 32, for by data to be backed up according to
Predetermined size is divided into data block to be backed up, and calculates the data fingerprint of the data block to be backed up；Backup transmitting element 33,
The backup server is sent to for the data fingerprint for calculating the fingerprint calculation unit 32 and the data block to be backed up,
To cause the backup server that the data block to be backed up is stored into the first version data block, and store described first
The index information of the data block of each in version, the index information includes the position of the data block to be backed up and data refer to
Line.
A kind of main frame, such as interchanger or router etc. are also provided in the present embodiment, structural representation as shown in figure 12, is wrapped
The processor 41 being connected respectively in bus, emitter 42 and receiver 43 are included, and can also include being connected to depositing in bus
Reservoir, wherein：
Be used for storing the data received from receiver 43 in memory, and can also store the processing data of processor 41 must
Want the information such as file；Emitter 42 and receiver 43 are the ports that main frame communicates with miscellaneous equipment.
Emitter 42 is used to send data recovery request to backup server, and the data recovery request includes being asked
The data version information of recovery；Receiver 43 is used to receive the first data block and first number that the backup server is sent
According to the positional information of block；Processor 41 is used to replace institute's positional information meaning in the current second edition with first data block
Show the second data block of position to carry out data recovery, wherein, the positional information of first data block and the first data block is
A certain second data block, corresponding with the data version information that the data recovery request includes first in the second edition
When the first data block of correspondence position is inconsistent in version, sent by the backup server.So there is no need to the master
All data blocks stored on the target disk or virtual machine of machine are recovered so that can reduce the number recovered during data recovery
According to further reducing the time of data recovery；Without the need for transmitting whole magnetic between backup server and the main frame
All data blocks stored in the data block or virtual machine of disk, reduce the data volume transmitted between backup server and main frame.
Further, the processor 41 in main frame, which is additionally operable to data to be backed up being divided into according to predetermined size, treats standby
Part data block, and calculate the data fingerprint of the data block to be backed up；Emitter 42 is additionally operable to calculate the processor 41
Data fingerprint and the data block to be backed up are sent to the backup server, to cause the backup server to treat standby by described
Part data block stores into the first version data block, and stores the index information of each data block in the first version, institute
Stating index information includes position and the data fingerprint of the data block to be backed up.
The embodiment of the present invention also provides a kind of standby system, and structural representation as shown in Figure 1a, can mainly include backup
Server and at least one main frame, wherein, the Data Recapture Unit that the structure of backup server can be as described in above-mentioned Fig. 8 or 9
Structure, or the backup server as described in above-mentioned Figure 10 structure；The structure of main frame can be as described in above-mentioned Figure 11 data
The structure of recovery device, the structure of main frame that can also be as described in above-mentioned Figure 12, herein without repeating.
The embodiment of the present invention also provides another standby system, and structural representation can include standby as shown in Figure 1 b, mainly
Part server and at least one storage device, wherein, the data that the structure of backup server can be as described in above-mentioned Fig. 8 or 9 are extensive
The structure of apparatus for coating, or the backup server as described in above-mentioned Figure 10 structure, herein without repeating.
The embodiment of the present invention also provides another standby system, and structural representation can include standby as illustrated in figure 1 c, mainly
Part server and at least one storage device and storage are backed up, wherein, the structure of backup server can be such as the institutes of above-mentioned Fig. 8 or 9
The structure for the Data Recapture Unit stated, or the backup server as described in above-mentioned Figure 10 structure, herein without repeating.Its
In, storage backup is the data on backup storage device；And backup server is for controlling storage to back up and store
Equipment, and the related data of backup are all stored into storage backup.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
To instruct the hardware of correlation to complete by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：Read-only storage（ROM）, random access memory（RAM）, disk or CD etc..
Data reconstruction method, device and the standby system provided above the embodiment of the present invention is described in detail,
Specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is to use
Understand the method and its core concept of the present invention in help；Simultaneously for those of ordinary skill in the art, according to the present invention's
Thought, will change in specific embodiments and applications, in summary, and this specification content should not be construed as
Limitation of the present invention.
Claims (14)
1. a kind of data reconstruction method, it is characterised in that including：
Data recovery request is received, the data recovery request includes the data version information for asking to recover；
If correspondence position in a certain second data block in the current second edition, first version corresponding with the data version information
The first data block put is inconsistent, and the data block of corresponding position is changed in main frame or storage device, then by described
The positional information of one data block and first data block is sent to main frame or storage device, to cause the main frame or storage to set
Standby first data block replaces the second data block of position indicated by positional information in the second edition to carry out data
Recover.
2. the method as described in claim 1, it is characterised in that described by first data block and first data block
Positional information is sent to before main frame or storage device, in addition to：
The corresponding data fingerprint of the first data block in data version information correspondence first version is obtained respectively and current the
The corresponding data fingerprint of second data block in two versions；
If the corresponding data fingerprint of a certain second data block, first with correspondence position in first version in the second edition
The corresponding data fingerprint of data block is inconsistent, then a certain second data block in the current second edition, with data version
The first data block of correspondence position is inconsistent in this information correspondence first version.
3. method as claimed in claim 2, it is characterised in that before the reception data recovery request, in addition to：
Obtain data block to be backed up, and the data block to be backed up data fingerprint；
The data block to be backed up is stored into the first version data block, and stores each data block in the first version
Index information, the index information includes position and the data fingerprint of the data block to be backed up.
4. method as claimed in claim 3, it is characterised in that
If a certain first data block and correspondence position in the third edition sheet stored in backup server in the first version
The 3rd data block it is identical, then it is described the data block to be backed up is stored into the first version data block to specifically include：Storage
The first redirection information of a certain first data block is deposited, first redirection information is used for certain in the first version
One first data block is redirected to the 3rd data block of correspondence position in the third edition sheet；And/or,
If a certain first data block and correspondence position in the third edition sheet stored in backup server in the first version
The 3rd data block it is identical, then the index information of a certain first data block of the storage first version is specifically included：Storage
The second redirection information of the index information of a certain first data block described in the first version is deposited, described second redirects letter
Cease for the index information of a certain first data block in the first version to be redirected into correspondence position in the third edition sheet
The 3rd data block index information.
5. a kind of data reconstruction method, it is characterised in that including：
Data recovery request is sent to backup server, the data recovery request includes the versions of data letter for asking to recover
Breath；
The first data block of the backup server transmission and the positional information of first data block are received, with the described first number
The second data block of position indicated by positional information in the current second edition is replaced according to block to carry out data recovery；
Wherein, the positional information of first data block and the first data block is a certain second data in the second edition
The first data block of correspondence position is not in block, first version corresponding with the data version information that the data recovery request includes
When consistent, sent by the backup server.
6. method as claimed in claim 5, it is characterised in that before the transmission data recovery request is to backup server,
Also include：
Data to be backed up are divided into data block to be backed up according to predetermined size, and calculate the number of the data block to be backed up
According to fingerprint；
The data fingerprint of the calculating and the data block to be backed up are sent to the backup server, to cause the backup
The data block to be backed up is stored into the first version data block by server, and stores each data in the first version
The index information of block, the index information includes position and the data fingerprint of the data block to be backed up.
7. a kind of Data Recapture Unit, it is characterised in that including：
Request reception unit, for receiving data recovery request, the data recovery request includes the data for asking to recover
Version information；
Transmitting element, if for a certain second data block in the current second edition, received with the request reception unit
The first data block of correspondence position is inconsistent in data version information correspondence first version in data recovery request, main frame or deposits
The data block of corresponding position is changed in storage equipment, then by the position of first data block and first data block
Information is sent to main frame or storage device, to cause the main frame or storage device to replace described second with first data block
The second data block of position indicated by positional information is to carry out data recovery in version.
8. device as claimed in claim 7, it is characterised in that also include：
Fingerprint acquiring unit, for obtaining the data version that the data recovery request that the request reception unit is received includes respectively
Second data block correspondence in the corresponding data fingerprint of first data block and the current second edition in this information correspondence first version
Data fingerprint；
The transmitting element, if a certain second data block pair in the second edition obtained specifically for the fingerprint acquiring unit
The data fingerprint answered, data fingerprint corresponding with the first data block of correspondence position in first version is inconsistent, then by described
The positional information of one data block and first data block is sent to main frame or storage device.
9. device as claimed in claim 8, it is characterised in that also include：
Acquiring unit to be backed up, for obtaining data block to be backed up, and the data block to be backed up data fingerprint；
Storage element, the data block to be backed up for the acquiring unit to be backed up to be obtained stores into the first version data
Block, and the index information of each data block in the first version is stored, the index information includes the data to be backed up
The position of block and data fingerprint.
10. device as claimed in claim 9, it is characterised in that
The storage element, if specifically for a certain first data block in the first version with having been stored up in the storage element
The 3rd data block of correspondence position is identical in the third edition sheet deposited, then store a certain first data block first redirects letter
Breath, first redirection information is used to a certain first data block in the first version being redirected in the third edition sheet
3rd data block of correspondence position；And/or,
If specifically for a certain first data block in the first version with it is right in the third edition sheet stored in storage element
Answer the 3rd data block of position identical, then store second of the index information of a certain first data block described in the first version
Redirection information, second redirection information is used to reset the index information of a certain first data block in the first version
To the index information of the 3rd data block of correspondence position into the third edition sheet.
11. a kind of Data Recapture Unit, it is characterised in that including：
Request transmitting unit, for sending data recovery request to backup server, the data recovery request includes asking
Seek the data version information of recovery；
Recovery unit is received, for receiving the first data block of the backup server transmission and the position of first data block
Information, the second data block of position indicated by positional information in the current second edition is replaced with first data block to carry out
Data recovery；
Wherein, the positional information of first data block and the first data block is a certain second data in the second edition
The first data block of correspondence position is not in block, first version corresponding with the data version information that the data recovery request includes
When consistent, sent by the backup server.
12. device as claimed in claim 11, it is characterised in that also include：
Fingerprint calculation unit, for data to be backed up to be divided into data block to be backed up according to predetermined size, and calculates institute
State the data fingerprint of data block to be backed up；
Backup transmitting element, for the data fingerprint of the calculating and the data block to be backed up to be sent into the backup services
Device, to cause the backup server that the data block to be backed up is stored into the first version data block, and stores described
The index information of the data block of each in first version, the index information includes position and the data of the data block to be backed up
Fingerprint.
13. a kind of standby system, it is characterised in that including backup server and at least one main frame, the backup server is
Data Recapture Unit as described in any one of claim 7 to 10, the main frame is the data as described in claim 11 or 12
Recovery device.
14. a kind of standby system, it is characterised in that including backup server and at least one storage device, the backup services
Device is the Data Recapture Unit as described in any one of claim 7 to 10.
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| CN108664353A (en) * | 2017-03-29 | 2018-10-16 | 中国移动通信集团四川有限公司 | The method, apparatus and replica management server that data are restored |
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