CN107908501A - A kind of VMware virtual machine synthesized backup methods based on index - Google Patents
A kind of VMware virtual machine synthesized backup methods based on index Download PDFInfo
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- CN107908501A CN107908501A CN201711013999.3A CN201711013999A CN107908501A CN 107908501 A CN107908501 A CN 107908501A CN 201711013999 A CN201711013999 A CN 201711013999A CN 107908501 A CN107908501 A CN 107908501A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
- G06F2009/45562—Creating, deleting, cloning virtual machine instances
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Abstract
The invention discloses a kind of VMware virtual machine synthesized backup methods based on index, including step：Index data base is established, VMware virtual machines are backed up completely, and complete backup information is written in index data base；Incremental backup is carried out to VMware virtual machines, and incremental backup information is written in index data base；In index data base, the newest archive index table of query time, obtains each newest sector block index record according to BACKUP TIME point, is saved in new synthetic backup concordance list；Search index database, newest index record before each sector block specified time point is obtained, obtains position of each sector block in storage medium backup set, the content of sector block is read from corresponding backup set, sector block content is write to the relevant position of magnetic disk of virtual machine again, completes to recover.Invention has the advantages of high efficiency, time-consuming to greatly shorten.
Description
Technical field
The present invention relates to computer data backup technical field, and in particular to a kind of VMware virtual machines based on index
Synthesized backup method.
Background technology
Virtualization product is subject to the extensive favor of client, at present in the larger field of the data volumes such as finance, internet, medical treatment
All extensive utilization has arrived virtualization product, and VMware virtual machines become in the world since easy to use, feature-rich, reliability are high
The most widely used virtual machine.
Although VMware has powerful virtualization, in practical applications, if there is hard disk corruptions, virtual machine
Situations such as fixed disk file damages, VMware virtual machines are not normally functioning, and cause to bring heavy losses to client, therefore for upper
Situation is stated, it is necessary to be backed up to VMware virtual machine hard disk files.
The backup of VMware at present is mainly obtained by CBT (Changed Block Tracking blocks change tracking module)
To the change block of each disk, its result is similar " (117768192,65536), (132120576,65536) ", the lattice of each
Formula is (offset, length)；Offset represents the initial position of change block, and length represents length, reuses Virtual
Function VixDiskLib in disk API (virtual disk application programming interface, is some pre-defined functions) is read
The data of corresponding disk are taken, so as to achieve the purpose that backup.
Backup is divided into backup and synthetic backup completely in the prior art；Backup all can be by magnetic disk of virtual machine every time for backup completely
On all data full backups into a memory, it is this backup to network, host and storage can all cause greatly
Resource consumption, the backup of gained are known as complete backup set；Incremental backup is from upper one to each VMware virtual machines virtual disk
Secondary to back up changed sector block completely and backed up, the backup of gained is known as incremental backup collection；Synthetic backup is then to deposit
Complete backup set and incremental backup in reservoir assemble a new complete backup set, and this backup mode, is not take up network
Bandwidth, similar local read-write, reduces the load of production environment, mainly handles and carried out not in production environment.
Traditional synthetic backup is to be synthesized for what data content was synthesized, it is necessary to get needs in the prior art
Data content, then a new backup set is reorganized into, when the backup set if necessary to synthesize is very big, the meeting of synthetic backup time
It is longer, inefficient (but for relatively complete backup or efficient).Meanwhile traditional synthetic backup mode, Zhi Nengju
It is limited to that the several backup set for specifying synthesis, it is impossible to arbitrarily specify any backup set to be synthesized.Than if any a backup set chain
A, B, C, D, wherein A are complete backup sets, and BCD is incremental backup collection, and conventional synthesis backup mode is exactly that ABCD is synthesized one
A new backup set E.If recovering this moment of D backup sets, usually first recover A, recovering BCD successively, having
After synthetic backup collection E, it is possible to directly recover backup set E to reach recovery effects.If what is specified is C backups to be recovered
Collection, that just can only first recover A, then recover BC successively.The problem of so still meeting one backup chain ABC of recovery in need, recover
Efficiency is not still high, recovers backup chain and generally has the problem of same position data are capped, than if desired for C is recovered, this is backed up
, it is necessary to recover ABC in order during collection, if there is the content of sector block 1 in ABC backup sets, the content of sector block 1 during recovery
Will all it be covered once by ABC, the data that A is recovered may be covered by BC.Capped data are inherently to recovering
The waste of resource, can directly recover synthetic backup collection E to complete the recovery to D by traditional synthetic backup mode, not deposit
The data cover the problem of.But during if necessary to recover C, backup set E is unsatisfactory for condition, and traditional synthetic backup mode is just
It can not tackle, still can only recover ABC in order.It is typically all by newest backup set or synthesis completely when performing synthetic backup
Backup set is synthesized with the incremental backup collection after it, such as, newest backup set chain ABC, when starting synthetic backup, is exactly
ABC is synthesized；Newest backup set chain ABCD, when starting synthetic backup, exactly synthesizes ABCD；It is this with data
Content is the synthesis mode underaction of synthesis target, and only when performing synthetic backup, which backup set needs just can determine that
Synthesis, does not support the dynamic of any backup set to synthesize, and any backup set can not be specified to recover.
The synthetic backup of the present invention is synthesized by way of index, is not only restricted to the size of backup set, together
When support the dynamic of any backup set to synthesize, when specifying any backup set to recover, the data with regard to each sector block can be automatically determined
It is in which backup set.
The content of the invention
To solve deficiency of the prior art, the present invention provides a kind of VMware virtual machines synthetic backup side based on index
Method, solves existing virtual machine synthesized backup method using data content as synthesis target, BACKUP TIME is long and efficiency is low, synthesis side
Formula is dumb, does not support the dynamic of any backup set to synthesize, it is impossible to the problem of specifying any backup set to recover.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that：A kind of VMware virtual machines based on index close
Into backup method, it is characterised in that including step：
Step 1: establishing index data base, VMware virtual machines are backed up completely, and complete backup information is write
Into index data base；
Step 2: carrying out incremental backup to VMware virtual machines, and incremental backup information is written in index data base；
Step 3: in index data base, the newest archive index table of query time, obtains each according to BACKUP TIME point
Newest sector block index record, is saved in new synthetic backup concordance list；
Step 4: search index database, obtains newest index record before each sector block specified time point, obtain every
Position of a sector block in storage medium backup set, reads the content of sector block, by sector block content from corresponding backup set
The relevant position of magnetic disk of virtual machine is write again, completes to recover.
A kind of foregoing VMware virtual machine synthesized backup methods based on index, it is characterized in that：The step 1, completely
Backup-step includes：
1) the vSphere API provided using VMware vSphere establish the connection with VMware virtual machines, and back up
The configuration information of virtual machine；
2) snapshot is created using vSphere API；
3) connection with first disk of snapshot is established using the VDDK API of VMware；
4) VDDK API are called to read first disk in snapshot, the content of all sector blocks, by each sector block content
It is saved in a backup set in storage medium, while by the complete backup information of each sector block, writes index data base
In, form complete archive index table；
5) other disks in snapshot are handled successively, after all disks are disposed, delete snapshot, and are disconnected and empty machine
Connection.
A kind of foregoing VMware virtual machine synthesized backup methods based on index, it is characterized in that：The letter of backup completely
Breath includes：The affiliated magnetic disk of virtual machine unique mark of each sector block, sector block number, affiliated backup set id, sector block number
According to the deviation post in backup set, the size of data of sector block and BACKUP TIME point.
A kind of foregoing VMware virtual machine synthesized backup methods based on index, it is characterized in that：In the step 2, increase
Amount backup specific steps include：
1) vSphere API are used to establish the connection with virtual machine, and the configuration information of backup virtual machine；
2) snapshot is created using vSphere API；
3) connection with first disk of snapshot is established using VDDK API；
4) to first disk of snapshot, QueryChangedDiskAreas interfaces are called, when obtaining it with Last Backup
The fan block lists changed between disk；
5) call VDDK API to read the content of the changed sector block of the disk, each sector block content is saved in
In a backup set in storage medium, while the incremental backup information of each sector block is write in index data base, record
Into time newest archive index table；
6) other disks in snapshot are handled successively, after all disks are disposed, delete snapshot, and are disconnected and empty machine
Connection.
A kind of foregoing VMware virtual machine synthesized backup methods based on index, it is characterized in that：The incremental backup letter
Breath includes：Magnetic disk of virtual machine unique mark, sector block number belonging to the block of each sector, affiliated backup set id, fan block data
The size of data and BACKUP TIME point of deviation post, sector block in backup set.
A kind of foregoing VMware virtual machine synthesized backup methods based on index, it is characterized in that：In the step 3, when
Between newest archive index table be complete archive index table or synthetic backup concordance list.
A kind of foregoing VMware virtual machine synthesized backup methods based on index, it is characterized in that：In the step 4, tool
Body recovering step includes：
1) using vSphere API foundation and the connection of virtual machine to be restored, and the configuration information of virtual machine is recovered；
2) snapshot is created using vSphere API；
3) connection with first disk of snapshot is established using VDDK API；
4) search index data-base recording, according to the unique mark of disk and BACKUP TIME point, obtains each sector block
Newest index record before specified time point, the position of each sector block backup set in storage medium is learnt according to index, from
The content of sector block is read in corresponding backup set；VDDK API are recalled, sector block content is write into the corresponding of snapshot disk again
Position；After the completion of the sector block write-in of the disk, the connection with disk is closed；
5) other disks in snapshot are handled successively, delete snapshot, and disconnect the connection with empty machine.
The beneficial effect that the present invention is reached：The present invention is by way of indexing and synthesizing to VMware virtual machine magnanimity series
According to synthetic backup is carried out, synthesis mode is flexible, supports the dynamic of any backup set synthesize, can be quickly according to index record during recovery
The content for each sector block for needing to recover is obtained, solves the problems, such as to need to rely on backup set chain, the method for the present invention during recovery
Combined coefficient is high, time-consuming to greatly shorten, and is adapted to synthetic backup and the recovery of VMware virtual machine mass data.
Embodiment
The invention will be further described below.Following embodiments are only used for the technical side for clearly illustrating the present invention
Case, and be not intended to limit the protection scope of the present invention and limit the scope of the invention.
A kind of VMware virtual machine synthesized backup methods based on index, step include：
Step 1: establishing index data base by existing database technology, VMware virtual machines are backed up completely, and
Complete backup information is written in index data base；
The step 1, specific backup-step completely include：
1) application programming interface (hereinafter referred to as vSphere API) provided using VMware vSphere is built
Vertical and VMware virtual machines connection, and the configuration information of backup virtual machine；
2) create snapshot using vSphere API, often create the snapshot of Quiseced types, ensureing to apply or
File system consistency；
3) first with snapshot is established using the virtual disk development kit (hereinafter referred to as VDDK API) of VMware
The connection of disk, the transmission mode of connection are one kind in san/hotadd/nbdssl/nbd；
4) VDDK API are called to read first all sector of disk (virtual machine there may be multiple disks) in snapshot
The content of block, in the backup set that each sector block content is saved in storage medium, which has an id, together
When by the affiliated magnetic disk of virtual machine unique mark of each sector block, sector block number, affiliated backup set id, fan block data exists
Size of data and BACKUP TIME point the composition index record of deviation post, sector block in backup set, i.e., backup is believed completely
Breath, writes in index data base, forms complete archive index table；
5) other disks in snapshot are handled successively, after all disks are disposed, delete snapshot, and are disconnected and empty machine
Connection.
Step 2: carrying out incremental backup to VMware virtual machines, and incremental backup information is written in index data base；
The step 2, specific incremental backup step include：
1) vSphere API are used to establish the connection with virtual machine, and the configuration information of backup virtual machine；
2) create snapshot using vSphere API, often create the snapshot of Quiseced types, ensureing to apply or
File system consistency；
3) established using VDDK API and the connection of first disk of snapshot, the transmission mode of connection would is that san/
One kind in hotadd/nbdssl/nbd；
4) to first disk of snapshot, QueryChangedDiskAreas interfaces are called, when obtaining it with Last Backup
The fan block lists changed between disk；
5) call VDDK API to read the content of the changed sector block of the disk, each sector block content is saved in
In a backup set in storage medium, at the same by the affiliated magnetic disk of virtual machine unique mark of each sector block, sector block number,
Affiliated backup set id, deviation post of the fan block data in backup set, the size of data and BACKUP TIME point of sector block
Index record, i.e. incremental backup information are formed, writes in index data base, is recorded in time newest archive index table, should
Concordance list is probably complete backup, it is also possible to synthetic backup concordance list.
6) other disks in snapshot are handled successively, after all disks are disposed, delete snapshot, and are disconnected and empty machine
Connection.
Step 3: in index data base, (the backup or synthetic backup index completely of the newest archive index table of query time
Table), each newest sector block index record is obtained according to BACKUP TIME point, is saved in new synthetic backup concordance list；It
The index record of the incremental backup performed afterwards is saved in the synthetic backup concordance list, until next time completely or synthetic backup
During beginning, it recorded in new table.
Step 4：Search index database, according to the unique mark of disk and BACKUP TIME point, obtains each sector block and refers to
Newest index record before fixing time a little, obtains position of each sector block in storage medium backup set, from corresponding backup set
The middle content for reading sector block；Sector block content is write to the relevant position of magnetic disk of virtual machine again, completes to recover.
In step 4, specific recovering step includes：
1) using vSphere API foundation and the connection of virtual machine to be restored, and the configuration information of virtual machine is recovered；
2) create snapshot using vSphere API, often create the snapshot of Quiseced types, ensureing to apply or
File system consistency；
3) connection with first disk of snapshot is established using VDDK API；
4) search index data-base recording, according to the unique mark of disk and BACKUP TIME point, obtains each sector block
Newest index record before specified time point, according to index learn each sector block belonging to storage medium in backup set id, partially
Pan position and length, read the content of sector block from corresponding backup set；VDDK API are recalled, sector block content is write again
Enter the relevant position of snapshot disk；After the completion of the sector block write-in of the disk, the connection with disk is closed；
5) other disks in snapshot are handled successively, delete snapshot, and disconnect the connection with empty machine.
1 Backup Data of table represents example
| Sector block 1 | Sector block 2 | Sector block 3 | Sector block 4 | Sector block 5 | Sector block 6 | Sector block 7 | Sector block 8 | Sector block 9 | |
| Complete t1 | i11 | i12 | i13 | i14 | i15 | i16 | i17 | i18 | i19 |
| Increment t2 | i22 | i26 | |||||||
| Increment t3 | i31 | i34 | i38 | ||||||
| Increment t4 | i44 | i46 | i49 | ||||||
| Synthesize t5 | i31 | i22 | i13 | i44 | i15 | i46 | i17 | i38 | i49 |
| Increment t6 | i63 | i66 | |||||||
| Synthesize t7 | i31 | i22 | i63 | i44 | i15 | i66 | i17 | i38 | i49 |
Explanation：First row represents type of backup and time point, and " complete t1 " represents the complete backup done at t1 time points；
" increment t4 " represents the incremental backup done at t4 time points；" synthesis that synthesis t7 " expressions are done at t7 time points is standby
Part.The first row represents sector block number.I11 is represented, at the t1 moment, 1 corresponding index record of sector block；I15 is represented in t1
Carve, 5 corresponding index record of sector block, other and so on.Increment t2 has two sector blocks to change when backup, fans
Block 2 and sector block 6, preserve index i22 and i26.Other increments are similarly.
" synthesis t5 " is exactly that t1, t2, t3, t4 moment corresponding complete and incremental backup are carried out synthetic backup, can by table 1
It is that the newest record of i31 (index record recorded during increment t3), sector block 2 is i22, sector to know the newest record of sector block 1
The newest record of block 3 is i13, and so on.The part of overstriking is exactly each newest record of sector block.Synthetic backup is exactly will
The newest record of each sector block, which is saved in new concordance list, in backup chain (t1, t2, t3, t4) forms synthetic backup index
Table.
" synthesis t7 " is to be synthesized the synthetic backup at t5 moment and the incremental backup at t6 moment, wherein, increment t6 has
Two sector blocks change, and the newest index of sector block 3 is i63, and the newest index of sector block 6 is i66.
Compared with traditional data synthetic backup, the synthetic backup based on index only handle index record, it is necessary to processing
Data volume very little, it is efficient, it is time-consuming to greatly shorten；During recovery, index record is first got, each sector block is known according to index
Content record in which position, it is efficient, take short.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of VMware virtual machine synthesized backup methods based on index, it is characterised in that including step：
Step 1: establishing index data base, VMware virtual machines are backed up completely, and complete backup information is written to rope
Draw in database；
Step 2: carrying out incremental backup to VMware virtual machines, and incremental backup information is written in index data base；
Step 3: in index data base, the newest archive index table of query time, obtains each newest according to BACKUP TIME point
Sector block index record, be saved in new synthetic backup concordance list；
Step 4: search index database, obtains newest index record before each sector block specified time point, obtains each fan
Position of the block in storage medium backup set, the content of sector block is read from corresponding backup set, sector block content is write again
Enter the relevant position of magnetic disk of virtual machine, complete to recover.
2. a kind of VMware virtual machine synthesized backup methods based on index according to claim 1, it is characterized in that：It is described
Step 1, complete backup-step include：
1) the vSphere API provided using VMware vSphere establish the connection with VMware virtual machines, and standby virtual
The configuration information of machine；
2) snapshot is created using vSphere API；
3) connection with first disk of snapshot is established using the VDDK API of VMware；
4) VDDK API are called to read first disk in snapshot, the content of all sector blocks, each sector block content is preserved
In a backup set into storage medium, while by the complete backup information of each sector block, write in index data base, shape
Into complete archive index table；
5) other disks in snapshot are handled successively, after all disks are disposed, delete snapshot, and disconnect the company with empty machine
Connect.
3. a kind of VMware virtual machine synthesized backup methods based on index according to claim 2, it is characterized in that：It is described
Complete backup information includes：The affiliated magnetic disk of virtual machine unique mark of each sector block, sector block number, affiliated backup set
Id, deviation post of the fan block data in backup set, the size of data and BACKUP TIME point of sector block.
4. a kind of VMware virtual machine synthesized backup methods based on index according to claim 1, it is characterized in that：It is described
In step 2, incremental backup specific steps include：
1) vSphere API are used to establish the connection with virtual machine, and the configuration information of backup virtual machine；
2) snapshot is created using vSphere API；
3) connection with first disk of snapshot is established using VDDK API；
4) to first disk of snapshot, QueryChangedDiskAreas interfaces are called, obtain it and disk during Last Backup
Between the fan block lists that are changed；
5) call VDDK API to read the content of the changed sector block of the disk, each sector block content is saved in storage
In a backup set in medium, while the incremental backup information of each sector block is write in index data base, when being recorded
Between in newest archive index table；
6) other disks in snapshot are handled successively, after all disks are disposed, delete snapshot, and disconnect the company with empty machine
Connect.
5. a kind of VMware virtual machine synthesized backup methods based on index according to claim 4, it is characterized in that：It is described
Incremental backup information includes：Magnetic disk of virtual machine unique mark, sector block number belonging to the block of each sector, affiliated backup set id,
Fan deviation post of the block data in backup set, the size of data and BACKUP TIME point of sector block.
6. a kind of VMware virtual machine synthesized backup methods based on index according to claim 1, it is characterized in that：It is described
In step 3, time newest archive index table is complete archive index table or synthetic backup concordance list.
7. a kind of VMware virtual machine synthesized backup methods based on index according to claim 1, it is characterized in that：It is described
In step 4, specific recovering step includes：
1) using vSphere API foundation and the connection of virtual machine to be restored, and the configuration information of virtual machine is recovered；
2) snapshot is created using vSphere API；
3) connection with first disk of snapshot is established using VDDK API；
4) search index data-base recording, according to the unique mark of disk and BACKUP TIME point, obtains specifying for each sector block
Newest index record before time point, the position of each sector block backup set in storage medium is learnt according to index, from correspondence
The content of sector block is read in backup set；VDDK API are recalled, sector block content is write to the relevant position of snapshot disk again；
After the completion of the sector block write-in of the disk, the connection with disk is closed；
5) other disks in snapshot are handled successively, delete snapshot, and disconnect the connection with empty machine.
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| CN109284205A (en) * | 2018-09-21 | 2019-01-29 | 平安科技（深圳）有限公司 | Snap backup method, device, computer equipment and storage medium |
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