CN107608825A - A kind of method and device of cloud backup snapshot data - Google Patents
A kind of method and device of cloud backup snapshot data Download PDFInfo
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- CN107608825A CN107608825A CN201710852039.XA CN201710852039A CN107608825A CN 107608825 A CN107608825 A CN 107608825A CN 201710852039 A CN201710852039 A CN 201710852039A CN 107608825 A CN107608825 A CN 107608825A
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Abstract
The present invention provides a kind of method and device of cloud backup snapshot data, and methods described is applied to storage device, and methods described includes：Datum planes of the LUN at the first moment is obtained by snapshot；Snapshot Resources are distributed for the datum plane；In the LUN Snapshot Resources will be saved in from the first moment to initial data corresponding to the delta data at the second moment；Second moment is the subsequent time at the first moment；The Snapshot Resources at the first moment are entered into backup of racking.Compared to prior art, the storage device of the present invention uses the object storage mode of cloud storage, with reference to the snapping technique feature being locally stored, realize the high in the clouds backup of snapshot data, can be while front-end business performance be ensured, the cost of data backup is further reduced, improves the reliability of data backup.
Description
Technical field
The present invention relates to snapshot, cloud field, more particularly to a kind of method and device of cloud backup snapshot data.
Background technology
Snapshot (Snapshot) refers to a completely available copy on specifying data acquisition system, and the copy includes respective counts
According to the image at some time point (time point that copy starts).Snapshot can be a copy of the data represented by it,
Can be a duplicate of data.Currently used snapping technique have COW (Copy-On-Write, Copy on write) technologies and
ROW (Redirect-On-Write, redirects) technology when writing.Corresponding to data caused by usual snapping technique are maintained in
In storage device, over time, data can be more and more, take excessive memory space.Cloud storage possesses relatively low at present
Use cost, therefore the data being of little use in storage device can be backuped to cloud storage.
It is primarily present two kinds of relatively conventional cloud backup scenarios at present：First, the backup mode of Intrusion Detection based on host file, this
Scheme is needed to install a software on main frame, and the file on main frame is uploaded into cloud server by host software, to
Realize the backup of Hosts file；Second, realize that local memory device and the mutual of cloud storage melt using the backup mode of storage gateway
Close, by realizing the function of a similar storage gateway on the local storage device, the data on being locally stored are backuped into cloud
In storage.
But the file backup mode of Intrusion Detection based on host and host operating system have it is stronger associate, and mainly for document
It is poor Deng application, versatility；And although the backup mode versatility of use storage gateway has larger lifting compared with the former,
Space waste in cloud storage is larger, adds the cost of cloud storage.
The content of the invention
In view of this, it is standby to solve prior art medium cloud to provide a kind of method and device of cloud backup snapshot data by the present invention
The problem of part space hold is larger.
Specifically, the present invention is achieved through the following technical solutions：
The present invention provides a kind of method of cloud backup snapshot data, and methods described is applied to storage device, methods described bag
Include：
Datum planes of the LUN at the first moment is obtained by snapshot；
Snapshot Resources are distributed for the datum plane；
In the LUN snapshot will be saved in from the first moment to initial data corresponding to the delta data at the second moment
Resource；Second moment is the subsequent time at the first moment；
The Snapshot Resources at the first moment are entered into backup of racking.
Further, it is described that datum planes of the LUN at the first moment is obtained by snapshot, be specially：
The LUN is divided into multiple data blocks, datum planes of the LUN at the first moment, the number are obtained by snapshot
The initial address and length of each data block in the LUN are recorded according to plane.
Further, it is described by the LUN from the first moment to initial data corresponding to the delta data at the second moment
The Snapshot Resources are saved in, are specially：
It is when the LUN into the second moment from when having data block to change at the first moment, the data block of change is corresponding
The original data block at the first moment be saved in the Snapshot Resources.
Further, after the Snapshot Resources at the first moment being entered into backup of racking, methods described also includes：
By the Snapshot Resources at the first moment from local deletion.
Further, methods described also includes：
Datum planes of the LUN at the second moment is obtained by snapshot；
The Snapshot Resources at LUN the first moment are obtained from cloud backup；
The datum plane at second moment is reduced to first moment by the initial data in Snapshot Resources
Datum plane.
Conceived based on identical, the present invention also provides a kind of device of cloud backup snapshot data, and described device is applied to deposit
Equipment is stored up, described device includes：
Snapshot unit, for obtaining datum planes of the LUN at the first moment by snapshot；
Allocation unit, for distributing Snapshot Resources for the datum plane；
Storage unit, for by the LUN from the first moment to initial data corresponding to the delta data at the second moment
It is saved in the Snapshot Resources；Second moment is the subsequent time at the first moment；
Cloud backup units, for the Snapshot Resources at the first moment to be entered into backup of racking.
Further, the snapshot unit, specifically for the LUN is divided into multiple data blocks, obtained by snapshot
Datum planes of the LUN at the first moment, the datum plane record the initial address and length of each data block in the LUN
Degree.
Further, the storage unit, specifically for into the second moment having data block from the first moment as the LUN
When changing, the original data block at the first moment corresponding to the data block of change is saved in the Snapshot Resources.
Further, described device also includes：
Unit is deleted, for after the Snapshot Resources at the first moment are entered into backup of racking, the snapshot at the first moment to be provided
Source is from local deletion.
Further, described device also includes：
Reduction unit, for obtaining datum planes of the LUN at the second moment by snapshot；Obtain LUN's from cloud backup
The Snapshot Resources at the first moment；The datum plane at second moment is reduced to described by the initial data in Snapshot Resources
The datum plane at the first moment.
As can be seen here, the present invention can obtain datum planes of the LUN at the first moment by snapshot, and by LUN from the
Initial data corresponding to being carved into the delta data at the second moment for the moment is saved in Snapshot Resources corresponding to the datum plane, then
The Snapshot Resources at first moment are entered into backup of racking.Because the present invention only enters backup of racking to the data block of change, so as to
The shared Snapshot Resources being locally stored can be discharged, further improve the service efficiency of Snapshot Resources.Compared to existing skill
Art, storage device of the invention use the object storage mode of cloud storage, with reference to the snapping technique feature being locally stored, realize fast
Backed up according to the high in the clouds of data, while front-end business performance is ensured, can further reduce the cost of data backup, improve number
According to the reliability of backup.
Brief description of the drawings
Fig. 1 is a kind of handling process of the method for cloud backup snapshot data in a kind of illustrative embodiments of the present invention
Figure；
Fig. 2 is the datum plane schematic diagram in a kind of illustrative embodiments of the present invention；
Fig. 3 is the cloud backup schematic diagram of the snapshot data in a kind of illustrative embodiments of the present invention；
Fig. 4 is the schematic diagram of the T2 time data planes in a kind of illustrative embodiments of the present invention；
Fig. 5 is the schematic diagram of the reduction T1 time data planes in a kind of illustrative embodiments of the present invention；
The hardware configuration of equipment where the device of cloud backup snapshot data in a kind of illustrative embodiments of Fig. 6 present invention
Figure；
A kind of building-block of logic of the device of cloud backup snapshot data in a kind of illustrative embodiments of Fig. 7 present invention.
Embodiment
Fig. 1 is refer to, is a kind of place of the method for cloud backup snapshot data in a kind of illustrative embodiments of the present invention
Flow chart is managed, methods described is applied to storage device, and methods described includes：
Step 101, datum planes of the LUN at the first moment is obtained by snapshot；
Storage device includes multiple LUN (Logical Unit Number, LUN), for for application service
Device provides addressable logical storage resources., can be according to tactful periodically raw after the LUN of storage device enables snapshot functions
Snapshot time is produced, manufacturer is stored at present and preserves snapshot data caused by snapping technique using ROW or COW technologies.Storage device
Datum plane of the LUN resources in specified snapshot time can be obtained.It is only adjacent fast at two with storage device in the present embodiment
According to the moment, i.e. illustrated exemplified by snapshot data cloud backup when the first moment and the second moment, other any snapshot times are equal
The snapshot data cloud backup method at the first moment and the second moment can be repeated.
In the present embodiment, storage device can be when obtaining any LUN first at the first moment by way of snapshot
The datum plane at quarter.As one embodiment, as shown in Figure 2：The LUN can be divided into multiple equal in magnitude by storage device
Data block, such as data block A, data block B, data block C, LBA (Logical Block in address corresponding to each data block
Address, logical block address) address that uses when being application server access LUN.Then data block mapping is turned into one by one
Cloud storage data object, the initial address of the entitled data block of data object adds the length of data block, such as：Data
Block A entitled data block A initial address+data block A length, data block B entitled data block B initial address+
Data block B length, data block C entitled data block C initial address+data block C length, the content of data object are
The data that data block is preserved.Then datum planes of the LUN at the first moment is obtained by snapshot, the datum plane is mapped
For a file, the entitled LUN of file mark, the data object that this file is included, that is, this LUN
On data block.
Step 102, it is that the datum plane distributes Snapshot Resources；
In the present embodiment, storage device can be Snapshot Resources, institute corresponding to the datum plane distribution at first moment
It is the memory space for storing snapshot data to state Snapshot Resources.
Step 103, the Snapshot Resources will be saved in from the first moment to the delta data at the second moment in the LUN；
Second moment is the subsequent time at the first moment；
In the present embodiment, storage device will can protect in the LUN from the first moment to the delta data at the second moment
The Snapshot Resources are stored to, second moment is the subsequent time at the first moment.As one embodiment, when the LUN from
When first moment had the data block to change into the second moment, storage device can be by the first moment corresponding to delta data block
Original data block be saved in the Snapshot Resources.
Step 104, the Snapshot Resources at the first moment are entered into backup of racking.
In the present embodiment, before the snapshot at the second moment is carried out to the LUN, when the storage device can be by first
The Snapshot Resources at quarter enter backup of racking.
As one embodiment, after the Snapshot Resources at the first moment are entered backup of racking by storage device, one can also be entered
Step by the Snapshot Resources at the first moment from local deletion, so as to discharge corresponding memory space on local memory device, this
Sample can further improve the space utilization rate being locally stored.
In an alternate embodiment of the invention, the present invention can be according to certain strategy, and storage device can also select not being each
Moment all enters backup of racking to Snapshot Resources, but the Snapshot Resources in storage device periodically are entered into backup of racking, so as to
The peak traffic period is avoided, ensures the efficient process of business.In addition, accounted for from the angle of Information Security, storage device
Transmission Snapshot Resources can also be encrypted when cloud backs up, operation is then decrypted when fetching Snapshot Resources, so may be used
Further to improve the security of data.
Above is cloud backup scenario, is next introduced by the data recovery that cloud backs up to the side of particular moment datum plane
Case.
As one embodiment, when storage device obtains datum planes of the LUN at the second moment, it is necessary to recover by snapshot
During the datum plane of the last moment (i.e. the first moment) at second moment, when can obtain the first of LUN from cloud backup
The Snapshot Resources at quarter, then initial data corresponding to the delta data in Snapshot Resources the data at second moment are put down
Face is reduced to the datum plane at first moment.Therefore, the present invention can preferably reduce snapshot data and take memory space
Cost Problems, and have merging for depth with the correlation properties of existing storage device, the snapshot for having expanded storage device is deposited
Space is stored up, the data protection demand of longer time scope can be met with rational cost.
In summary, the present invention can be by preserving the data block changed on each snapshot time, when obtaining any two
Data variation between quarter, and realize data backup by way of cloud object stores.With traditional mode using cloud gateway
Compare, greater flexibility can be obtained using the storage mode of cloud object, and with the correlation properties of existing storage device
There is the fusion of depth, can preferably reduce the Cost Problems that snapshot data takes memory space.Compared to prior art, this hair
It is bright that backup of racking only is entered to the data block of change, so as to discharge the shared Snapshot Resources being locally stored, further carry
The service efficiency of high Snapshot Resources.The present invention can further reduce data backup while front-end business performance is ensured
Cost, improve the reliability of data backup.
For the objects, technical solutions and advantages of the present invention are more clearly understood, with reference to Fig. 3, Fig. 4, Fig. 5 to this hair
Bright scheme is described in further detail.
From the figure 3, it may be seen that LUN is divided into data block one by one, such as data block A, data block B, data block by this programme
C, then data block mapping is turned into the data object of cloud storage one by one, the starting point of the entitled data block of data object
Location adds the length of data block, the data that the content of data object is preserved by data block.For a LUN in storage device
Resource, LUN can periodically produce snapshot time after enabling snapshot functions according to tactful.
As shown in figure 3, creating a snapshot time at the T0 moment, the LUN resources at a T0 moment are saved in logic
Datum plane, including data block A0, B0, C0 initial address lengthening degree.Then storage device is the data at the T0 moment
The Snapshot Resources of Snapshot Resources, i.e. T0 moment corresponding to plane distribution.The Snapshot Resources at the T0 moment are used to preserve T0 to T1
Original data block corresponding to the data block of moment change, such as：In T0 to T1 moment, data block A0, B0, C0 are updated,
Become respectively for data block A1, B1, C1, because T0 to T1 moment data block all changes, then the Snapshot Resources at T0 moment
Original data block corresponding to delta data block is preserved, i.e., data block A0, B0, C0 are preserved in the Snapshot Resources at T0 moment；Work as arrival
During next snapshot time, i.e. T1 moment, storage device carries out the datum plane that snapshot obtains the LUN resources at T1 moment again, i.e.,
Data block A1, B1, C1 datum plane, including data block A1, B1, C1 initial address lengthening degree；Then storage device
For the Snapshot Resources of Snapshot Resources, i.e. T1 moment corresponding to the datum plane distribution at the T1 moment.The snapshot money at the T1 moment
Source is used to preserve original data block corresponding to the data block that T1 changes to the T2 moment, such as：In T1 to T2 moment, data block B1 is more
New is data block B2, and other data blocks do not change, then the Snapshot Resources at T1 moment are data block B1；When next one snapshot of arrival
During the moment, i.e. T2 moment, storage device carry out again snapshot obtain the T2 moment LUN resources datum plane, i.e. data block A1,
B2, C1 datum plane, including data block A1, B2, C1 initial address lengthening degree；Then storage device is the T2 moment
Datum plane distribution corresponding to Snapshot Resources, i.e. T1 moment Snapshot Resources.The Snapshot Resources at the T2 moment are used to preserve
Original data block corresponding to the data block that T2 changes to the T3 moment, such as：In T2 to the T3 moment, data block A1, C1 is updated to count
According to block A2, C2, other data blocks do not change, then the Snapshot Resources at T2 moment are data block A1, C1.By that analogy, T3 moment
Datum plane is data block A2, B2, C2 datum plane, including data block A2, B2, C2 initial address lengthening degree.T0、
The Snapshot Resources at T1, T2 moment can enter backup of racking after the completion of each storage, after a certain preset time can also be reached, one
Rise and enter backup of racking, the Snapshot Resources of cloud backup can locally be deleted from storage device, so as to reduce local storage space
Occupancy.
Above is cloud backup scenario, is next introduced by the data recovery that cloud backs up to the side of particular moment datum plane
Case.
For having backed up the data block on the time point in cloud storage, can discharge corresponding on local memory device
Memory space, it so can further improve the space utilization rate being locally stored.Data recovery scheme is described below.
Assuming that the Snapshot Resources at T0 moment and T1 moment are saved to high in the clouds, as shown in figure 4, locally there was only the T2 moment
Data block, i.e. data block A2, B2, C2, then the datum plane specific method for obtaining the T1 moment are as follows：
First obtain the T2 moment datum plane, i.e. data block A1, B2, C1 datum plane, including data block A1,
B2, C1 initial address lengthening degree；The Snapshot Resources at T1 moment, such as data block B1 are obtained from high in the clouds again；Then according to
The datum plane at the Snapshot Resources reduction T1 moment at T1 moment.Due to the datum plane at T2 moment, i.e. data block A1, B2, C1's
Datum plane, the Snapshot Resources storage at T1 moment is original data block corresponding to the data block updated to the T2 moment at the T1 moment,
If the Snapshot Resources at T1 moment are data block B1, illustrate that the data block of renewal is B2, and data block B2 is more at T1 to the T2 moment
Initial data before new is data block B1, and other data blocks do not update, thus can by data block B1 replacement data block B2,
And the initial address of the data block B2 in the datum plane at T2 moment and length are changed to data block B1 initial address and length
Degree, so as to obtain the datum plane of the datum plane at T1 moment, i.e. data block A1, B1, C1, including data block A1, B1, C1
Initial address lengthening degree, the datum plane at the T1 moment of reduction is as shown in Figure 5.
The datum plane at reduction T0 moment is such as needed, then the Snapshot Resources and T1 at T0 moment can be passed through according to aforesaid way
The datum plane at the datum plane reduction T0 moment at moment.
The data block changed by preserving in Each point in time, can very aspect acquisition any two time point between
Data variation, these data can be utilized, by way of cloud object stores, obtain specifying the datum plane at moment.With tradition
The mode using cloud gateway compare, greater flexibility can be obtained using the storage mode of cloud object, and with it is existing
The correlation properties of storage device have the fusion of depth, can preferably reduce the Cost Problems that snapshot data takes memory space.
Conceived based on identical, the present invention also provides a kind of device of cloud backup snapshot data, and the device can be by soft
Part is realized, can also be realized by way of hardware or software and hardware combining.Exemplified by implemented in software, cloud of the invention backup is fast
According to data device as the device on a logical meaning, be by the CPU of storage device where it will in memory it is corresponding
Computer program instructions read after run and form.
It refer to the device 700 that Fig. 6 is a kind of cloud backup snapshot data in a kind of illustrative embodiments of the present invention, institute
State device and be applied to storage device, the basic running environment of the device includes CPU, memory and other hardware, from logic level
On from the point of view of, the composition of the device of the cloud backup snapshot data is as shown in fig. 7, wherein the device 700 includes：
Snapshot unit 701, for obtaining datum planes of the LUN at the first moment by snapshot；
Allocation unit 702, for distributing Snapshot Resources for the datum plane；
Storage unit 703, for by the LUN from the first moment to original number corresponding to the delta data at the second moment
According to being saved in the Snapshot Resources；Second moment is the subsequent time at the first moment；
Cloud backup units 704, for the Snapshot Resources at the first moment to be entered into backup of racking.
Optionally, the snapshot unit 701, specifically for the LUN is divided into multiple data blocks, obtained by snapshot
Datum planes of the LUN at the first moment, the datum plane record the initial address and length of each data block in the LUN
Degree.
Optionally, the storage unit 703, specifically for into the second moment having data from the first moment as the LUN
When block changes, the original data block at the first moment corresponding to the data block of change is saved in the Snapshot Resources.
Optionally, described device also includes：
Unit 705 is deleted, for after the Snapshot Resources at the first moment are entered into backup of racking, by the snapshot at the first moment
Resource is from local deletion.
Optionally, described device also includes：
Reduction unit 706, for obtaining datum planes of the LUN at the second moment by snapshot；LUN is obtained from cloud backup
The first moment Snapshot Resources；The datum plane at second moment is reduced to institute by the initial data in Snapshot Resources
State the datum plane at the first moment.
In summary, the present invention can obtain datum planes of the LUN at the first moment by snapshot, and by LUN from the
Initial data corresponding to being carved into the delta data at the second moment for the moment is saved in Snapshot Resources corresponding to the datum plane, then
The Snapshot Resources at first moment are entered into backup of racking.Because the present invention only enters to initial data corresponding to the data block of change
Rack backup, so as to discharge the shared Snapshot Resources being locally stored, further improve the service efficiency of Snapshot Resources.
Compared to prior art, storage device of the invention uses the object storage mode of cloud storage, with reference to the snapshot skill being locally stored
Art feature, the high in the clouds backup of snapshot data is realized, can further reduce data backup while front-end business performance is ensured
Cost, improve the reliability of data backup.
The function of unit and the implementation process of effect specifically refer to and step are corresponded in the above method in said apparatus
Implementation process, it will not be repeated here.
For device embodiment, because it corresponds essentially to embodiment of the method, so related part is real referring to method
Apply the part explanation of example.Device embodiment described above is only schematical, wherein described be used as separating component
The unit of explanation can be or may not be physically separate, can be as the part that unit is shown or can also
It is not physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be according to reality
Need to select some or all of module therein to realize the purpose of application scheme.Those of ordinary skill in the art are not paying
In the case of going out creative work, you can to understand and implement.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the invention with principle.
Claims (10)
- A kind of 1. method of cloud backup snapshot data, it is characterised in that methods described is applied to storage device, methods described bag Include：Datum planes of the LUN at the first moment is obtained by snapshot；Snapshot Resources are distributed for the datum plane；In the LUN snapshot money will be saved in from the first moment to initial data corresponding to the delta data at the second moment Source；Second moment is the subsequent time at the first moment；The Snapshot Resources at the first moment are entered into backup of racking.
- 2. according to the method for claim 1, it is characterised in that described that data of the LUN at the first moment are obtained by snapshot Plane, it is specially：The LUN is divided into multiple data blocks, datum planes of the LUN at the first moment is obtained by snapshot, the data are put down Face records the initial address and length of each data block in the LUN.
- 3. according to the method for claim 2, it is characterised in that it is described by the LUN from the first moment to the second moment Delta data corresponding to initial data be saved in the Snapshot Resources, be specially：When the LUN into the second moment from when having data block to change at the first moment, by corresponding to the data block of change The data block at one moment is saved in the Snapshot Resources.
- 4. according to the method for claim 1, it is characterised in that after the Snapshot Resources at the first moment are entered into backup of racking, Methods described also includes：By the Snapshot Resources at the first moment from local deletion.
- 5. according to the method for claim 1, it is characterised in that methods described also includes：Datum planes of the LUN at the second moment is obtained by snapshot；The Snapshot Resources at LUN the first moment are obtained from cloud backup；The datum plane at second moment is reduced to the data at first moment by the initial data in Snapshot Resources Plane.
- 6. a kind of device of cloud backup snapshot data, it is characterised in that described device is applied to storage device, described device bag Include：Snapshot unit, for obtaining datum planes of the LUN at the first moment by snapshot；Allocation unit, for distributing Snapshot Resources for the datum plane；Storage unit, for will be preserved in the LUN from the first moment to initial data corresponding to the delta data at the second moment To the Snapshot Resources；Second moment is the subsequent time at the first moment；Cloud backup units, for the Snapshot Resources at the first moment to be entered into backup of racking.
- 7. device according to claim 6, it is characterised in thatThe snapshot unit, specifically for the LUN is divided into multiple data blocks, LUN is obtained at the first moment by snapshot Datum plane, the datum plane records the initial address and length of each data block in the LUN.
- 8. device according to claim 7, it is characterised in thatThe storage unit, will specifically for when the LUN into the second moment from when having data block to change at the first moment The source beginning data block at the first moment corresponding to the data block of change is saved in the Snapshot Resources.
- 9. device according to claim 6, it is characterised in that described device also includes：Delete unit, for after the Snapshot Resources at the first moment are entered into backup of racking, by the Snapshot Resources at the first moment from It is local to delete.
- 10. device according to claim 6, it is characterised in that described device also includes：Reduction unit, for obtaining datum planes of the LUN at the second moment by snapshot；The first of LUN is obtained from cloud backup The Snapshot Resources at moment；The datum plane at second moment is reduced to described first by the initial data in Snapshot Resources The datum plane at moment.
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| 包磊: "《作战数据管理》", 30 June 2015, 北京国防工业出版社 * |
| 方亦兵著: "《卫生计生专业技术人员保密教育读本》", 31 May 2017, 北京科学技术文献出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298975A (en) * | 2018-10-12 | 2019-02-01 | 郑州云海信息技术有限公司 | A kind of data processing method and device |
| CN111309522A (en) * | 2020-02-14 | 2020-06-19 | 星辰天合（北京）数据科技有限公司 | Object storage data protection method and device based on snapshot technology |
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