CN107391302A - Bitmap data management method and device - Google Patents
Bitmap data management method and device Download PDFInfo
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- CN107391302A CN107391302A CN201710454245.5A CN201710454245A CN107391302A CN 107391302 A CN107391302 A CN 107391302A CN 201710454245 A CN201710454245 A CN 201710454245A CN 107391302 A CN107391302 A CN 107391302A
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- event
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- bitmap data
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- disk mirroring
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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
- G06F11/1448—Management of the data involved in backup or backup restore
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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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/815—Virtual
Abstract
The invention discloses a kind of bitmap data management method, including：Monitoring currently writes event with the presence or absence of the IO of virtual machine backup；When the IO that there is currently virtual machine backup writes event and writes IO in the write-in disk mirroring file of the Backup Data corresponding to event, IO is write to the bitmap data corresponding to event and is synchronously saved in the disk mirroring file.The invention also discloses a kind of bitmap data managing device.The bitmap data that the present invention is avoided that under virtual machine abnormality is lost, and then ensure that stability when virtual machine backs up, while also accordingly improves virtual machine backup efficiency.
Description
Technical field
The present invention relates to virtual machine redundancy technique field, more particularly to bitmap data management method and device.
Background technology
Virtual machine backup is a critical function of virtual platform, and it is used to back up the data of virtual machine.At present
Common virtual-machine data backup method is realized by snapshot difference come synchronous variance data.Needed in backup procedure
IO Copy on writes are carried out to variance data, while to ensure on the page data and disk transmitted during IO Copy on writes
Unanimously, thus using a bitmap data Bitmap containing dirty pages face being modified during page transmission is indicated.
In existing back mechanism, bitmap data preserve in the buffer, if main frame power-off, virtual machine shutdown (restarting) or
Person's backup process such as terminates at the analogue, then bitmap data will be lost, and then need when causing to back up next time to carry out magnetic
The full backup of disk data, if data in magnetic disk capacity is larger, the full backup time is also longer, and then will be serious in backup procedure
Influence the performance of virtual machine.
The content of the invention
It is a primary object of the present invention to provide a kind of bitmap data management method and device, it is intended to solve in the prior art
The technical problem that bitmap data is easily lost when virtual machine backs up.
To achieve the above object, the present invention provides a kind of bitmap data management method, institute's bit-map data management method bag
Include：
Monitoring currently writes event with the presence or absence of the IO of virtual machine backup；
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirror
During as in file, IO is write to the bitmap data corresponding to event and is synchronously saved in the disk mirroring file.
Preferably, it is described to write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event
When writing in disk mirroring file, IO is write to the bitmap data corresponding to event be synchronously saved in the disk mirroring file and wrap
Include：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirror
During as in file, judge that this IO writes whether bitmap data corresponding to event in previous IO writes event has occurred set；
If in previous IO writes event set does not occur for the bitmap data that this IO writes corresponding to event, this IO is judged
Write whether the bitmap data corresponding to event in previous IO writes event has occurred set；
If in previous IO writes event set does not occur for the bitmap data that this IO writes corresponding to event, by this IO
The bitmap data corresponding to event is write synchronously to be saved in the disk mirroring file.
Preferably, whether the bitmap data for judging that this IO is write corresponding to event has occurred in previous IO writes event
Also include after set：
If set occurred in previous IO writes event for the bitmap data that this IO is write corresponding to event, it is asynchronous this
IO writes bitmap data corresponding to event into the disk mirroring file and returned；Or,
If set occurred in previous IO writes event for the bitmap data that this IO is write corresponding to event, asynchronous
Secondary IO writes bitmap data corresponding to event into the disk mirroring file and returned.
Preferably, institute's bit-map data management method also includes：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirror
During as in file, this IO is write to the bitmap data corresponding to event and is cached in preset level cache, for next IO
Write the bitmap data corresponding to event and carry out set judgement；And the bitmap data write this IO corresponding to event be cached to it is pre-
In the L2 cache put, set judgement is carried out for writing the bitmap data corresponding to event with next IO.
Preferably, the disk mirroring file is Qcow2 disk mirroring files, wherein, by Qcow2 disk mirrorings text
The data head of part is extended and Qcow2 disk mirroring file dilatations, and the bitmap data corresponding to event is write for storage IO.
Further, to achieve the above object, the present invention also provides a kind of bitmap data managing device, institute's bit-map data
Managing device includes：
Monitoring modular, event is write for monitoring the current IO with the presence or absence of virtual machine backup；
Management module, for writing event in the IO that there is currently virtual machine backup and IO being write to the backup number corresponding to event
During according in write-in disk mirroring file, IO is write to the bitmap data corresponding to event and is synchronously saved in the disk mirroring file
In.
Preferably, the management module is specifically used for：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirror
During as in file, judge that this IO writes whether bitmap data corresponding to event in previous IO writes event has occurred set；
When set does not occur during the bitmap data that this IO is write corresponding to event writes event in previous IO, this IO is judged
Write whether the bitmap data corresponding to event in previous IO writes event has occurred set；When this IO is write corresponding to event
This IO is write the bitmap data corresponding to event and synchronously preserved by bitmap data when set does not occur during previous IO writes event
Into the disk mirroring file.
Preferably, the management module is specifically additionally operable to：
When set has occurred during the bitmap data that this IO is write corresponding to event writes event in previous IO, it is asynchronous this
IO writes bitmap data corresponding to event into the disk mirroring file and returned；Or,
When set has occurred during the bitmap data that this IO is write corresponding to event writes event in previous IO, asynchronous
Secondary IO writes bitmap data corresponding to event into the disk mirroring file and returned.
Preferably, the management module is specifically additionally operable to：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirror
During as in file, this IO is write to the bitmap data corresponding to event and is cached in preset level cache, for next IO
Write the bitmap data corresponding to event and carry out set judgement；And the bitmap data write this IO corresponding to event be cached to it is pre-
In the L2 cache put, set judgement is carried out for writing the bitmap data corresponding to event with next IO.
Preferably, the disk mirroring file is Qcow2 disk mirroring files, wherein, by Qcow2 disk mirrorings text
The data head of part is extended and Qcow2 disk mirroring file dilatations, and the bitmap data corresponding to event is write for storage IO.
In the present invention, when the IO that there is currently virtual machine backup writes event, IO is write to the Backup Data corresponding to event
Write in disk mirroring file, meanwhile, IO is write to the bitmap data corresponding to event and is synchronously saved in the disk mirroring file
And it is non-caching in, so as to ensure that stability during virtual machine backup, while also accordingly improve virtual machine backup efficiency.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the embodiment of bitmap data management method one of the present invention；
Fig. 2 is the data structure signal of the embodiment of Qcow2 disk mirrorings file one in bitmap data management method of the present invention
Figure；
Fig. 3 is the refinement schematic flow sheet of step S20 in Fig. 1；
Fig. 4 is the schematic flow sheet of the embodiment of synchronization bit pattern data one in bitmap data management method of the present invention；
Fig. 5 is the high-level schematic functional block diagram of the embodiment of bitmap data managing device one of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
Reference picture 1, Fig. 1 are the schematic flow sheet of the embodiment of bitmap data management method one of the present invention.In the present embodiment, position
Diagram data management method includes：
Step S10, monitoring currently write event with the presence or absence of the IO of virtual machine backup；
Step S20, write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write
When entering in disk mirroring file, IO is write to the bitmap data corresponding to event and is synchronously saved in disk mirroring file.
In the present embodiment, IO writes event and refers specifically to deposit the variance data write-in purpose that virtual machine backs up by I/O write operation
The event of storage area.It is unlimited that the mode of event is write in the present embodiment for monitoring IO, is configured with specific reference to being actually needed.
In the present embodiment, when the IO that virtual machine backup be present writes event, then the IO is write to the backup number corresponding to event
According in write-in disk mirroring file.Meanwhile to ensure that bitmap data is not lost, while also allow for managing, therefore, IO is being write into thing
When in the Backup Data write-in disk mirroring file corresponding to part, IO is write to the bitmap data corresponding to event and is synchronously saved in together
In one disk mirroring file.
Optionally, in one embodiment, disk mirroring file is preferably Qcow2 disk mirroring files, wherein, by right
The data head of Qcow2 disk mirroring files is extended and Qcow2 disk mirroring file dilatations, so that storage IO writes event institute
Corresponding bitmap data, as shown in Figure 2.
For example, bitmap data is stored in disk mirroring file, VS is offline, bitmap data file is lost etc. can be prevented
The generation of abnormal conditions.Such as the storage bitmap data in Qcow2 disk mirroring files, corrupted data occurs in bitmap data
When can by the verifications of Qcow2 in itself come make ensure；And after I/O write operation failure, it can also be retried by IO to ensure bitmap
Data are written efficiently into, and then can effectively handle the caused exception of situations such as VS is offline, bitmap data file is lost.
In addition, as shown in Fig. 2 in Qcow2 disk mirroring files, Qcow2Head extension information, Jin Erke are stated
The data structure that effective compatibility is increased income, meanwhile, further state the Bitmap bitmaps corresponding to Qcow2Head extension information
The data structure of data storage head, and bitmap data is stored in Qcow2 disk mirroring files, especially by interface pair
Storage bitmap data are carried out in Cluster dynamically distributes section in Qcow2 disk mirroring files, while further accomplish to Qcow2
The dilatation of disk mirroring file, the bitmap data corresponding to event is write for storage IO.In addition, it is necessary to further illustrate,
In the prior art, bitmap data is generally held in two bitmap data files, and one of them is used to store real-time bitmap number
According to, and in the present embodiment, all bitmap datas are only stored in a bitmap data file and the bitmap data file is protected
Exist in Qcow2 disk mirroring files, consequently facilitating managing and tackling various unusual conditions, ensure that the stabilization of data storage
Property.
In the present embodiment, when the IO that there is currently virtual machine backup writes event, IO is write to the backup number corresponding to event
According to write-in disk mirroring file in, meanwhile, IO is write to the bitmap data corresponding to event and is synchronously saved in the disk mirroring file
In and it is non-caching in, so as to ensure that stability during virtual machine backup, while also accordingly improve virtual machine backup efficiency.
Reference picture 3, Fig. 3 are the refinement schematic flow sheet of step S20 in Fig. 1.Based on above-described embodiment, in the present embodiment,
Above-mentioned steps S20 further comprises：
Step S201, write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write
When entering in disk mirroring file, judge whether the bitmap data that this IO is write corresponding to event has occurred in previous IO writes event
Set；
Step S202, if in previous IO writes event set does not occur for the bitmap data that this IO writes corresponding to event,
Judge that this IO writes whether bitmap data corresponding to event in previous IO writes event has occurred set；
Step S203, if in previous IO writes event set does not occur for the bitmap data that this IO writes corresponding to event,
This IO is then write to the bitmap data corresponding to event to be synchronously saved in disk mirroring file.
In the present embodiment, to ensure that bitmap data is not lost, therefore bitmap data is recorded in Qcow2 disk mirroring files
In, and by bitmap data real-time synchronization into bitmap data file, then mean that each disk write I/O operation can all produce two
Individual IO：One IO is used for synchronous real-time bitmap data, and another IO is used for virtual machine Backup Data write-in disk, thus this will
Virtual machine performance is caused to decline to a great extent.Therefore, in the present embodiment, handled by judgement to reduce the frequency of real-time synchronization bitmap data
Rate, and then the corresponding performance for lifting virtual machine.
In the present embodiment, write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event
When writing in disk mirroring file, first judge this IO write bitmap data corresponding to event whether in previous IO writes event
Generation set, wherein, the data that bitmap data set is used to indicate the data area that IO writes the corresponding operation of event have been repaiied
Change, while also illustrate that the bitmap data corresponding to the data area has carried out record preservation.Therefore, if this IO writes event institute
In previous IO writes event set does not occur for corresponding bitmap data, then needs to write this IO into the bitmap data corresponding to event
Synchronously it is saved in disk mirroring file.
In addition, further to reduce the synchronizing frequency during bitmap data preserves, accordingly, it is considered to write data to user
When, write that the probability of duplicate data is very big, namely previous IO write the corresponding operation of event data area and previous identical it is general
Rate is very big, therefore determines whether the bitmap data that this IO is write corresponding to event has occurred in previous IO writes event
Set, and if set does not occur in previous IO writes event for bitmap data that this IO is write corresponding to event, by this IO
Write the bitmap data corresponding to event to be synchronously saved in disk mirroring file, so as to reduce further the synchronization of bitmap data
Frequency.
It is further alternative, in one embodiment, if the bitmap data that this IO writes corresponding to event writes thing in previous IO
Set occurs in part, then this asynchronous IO writes bitmap data corresponding to event into disk mirroring file and returned；Or,
If set has occurred in previous IO writes event for the bitmap data that this IO writes corresponding to event, this asynchronous IO writes thing
Bitmap data corresponding to part into disk mirroring file and returns, as shown in Figure 4.
It is further alternative, in one embodiment, write event in the IO that there is currently virtual machine backup and IO is write into event
When in corresponding Backup Data write-in disk mirroring file, this IO is write the bitmap data corresponding to event be cached to it is preset
Level cache in, carry out set judgement for writing bitmap data corresponding to event with next IO；And this IO is write into thing
Bitmap data corresponding to part is cached in preset L2 cache, for writing the bitmap data corresponding to event with next IO
Carry out set judgement.
In the present embodiment, it is stored in due to IO to be write to the bitmap data corresponding to event in disk mirroring file, therefore, i.e.,
Make in the case of virtual machine is in abnormal state (such as power down, process exception etc.), bitmap data will not also be lost.Meanwhile this
Embodiment can also further be realized in synchronization bit pattern data before backup and after backup virtual machine performance it is basically identical and without decline,
While so as to stability when ensure that virtual machine backup, the backup efficiency and performance of virtual machine are also accordingly improved.
Reference picture 5, Fig. 5 are the high-level schematic functional block diagram of the embodiment of bitmap data managing device one of the present invention.The present embodiment
In, bitmap data managing device includes：
Monitoring modular 10, event is write for monitoring the current IO with the presence or absence of virtual machine backup；
Management module 20, for writing event in the IO that there is currently virtual machine backup and IO being write to the backup corresponding to event
When in data write-in disk mirroring file, IO is write to the bitmap data corresponding to event and is synchronously saved in disk mirroring file.
In the present embodiment, IO writes event and refers specifically to deposit the variance data write-in purpose that virtual machine backs up by I/O write operation
The event of storage area.In the present embodiment for monitoring modular 10 monitor IO write event mode it is unlimited, with specific reference to be actually needed into
Row is set.
In the present embodiment, when the IO that the monitoring of monitoring modular 10 has virtual machine backup writes event, management module 20 should
IO is write in the Backup Data write-in disk mirroring file corresponding to event.Meanwhile to ensure that bitmap data is not lost, while also just
In management, management module 20 is when writing IO in the write-in disk mirroring file of the Backup Data corresponding to event, management module 20
IO is also further write to the bitmap data corresponding to event to be synchronously saved in same disk mirroring file.
Optionally, in one embodiment, disk mirroring file is preferably Qcow2 disk mirroring files, wherein, by right
The data head of Qcow2 disk mirroring files is extended and Qcow2 disk mirroring file dilatations, so that storage IO writes event institute
Corresponding bitmap data, as shown in Figure 2.
For example, bitmap data is stored in disk mirroring file, VS is offline, bitmap data file is lost etc. can be prevented
The generation of abnormal conditions.Such as the storage bitmap data in Qcow2 disk mirroring files, corrupted data occurs in bitmap data
When can by the verifications of Qcow2 in itself come make ensure；And after I/O write operation failure, it can also be retried by IO to ensure bitmap
Data are written efficiently into, and then can effectively handle the caused exception of situations such as VS is offline, bitmap data file is lost.
In addition, as shown in Fig. 2 in Qcow2 disk mirroring files, Qcow2Head extension information, Jin Erke are stated
The data structure that effective compatibility is increased income, meanwhile, further state the Bitmap bitmaps corresponding to Qcow2Head extension information
The data structure of data storage head, and bitmap data is stored in Qcow2 disk mirroring files, especially by interface pair
Storage bitmap data are carried out in Cluster dynamically distributes section in Qcow2 disk mirroring files, while further accomplish to Qcow2
The dilatation of disk mirroring file, the bitmap data corresponding to event is write for storage IO.In addition, it is necessary to further illustrate,
In the prior art, bitmap data is generally held in two bitmap data files, and one of them is used to store real-time bitmap number
According to, and in the present embodiment, all bitmap datas are only stored in a bitmap data file and the bitmap data file is protected
Exist in Qcow2 disk mirroring files, consequently facilitating managing and tackling various unusual conditions, ensure that the stabilization of data storage
Property.
In the present embodiment, when monitoring modular 10 monitors that the IO that there is currently virtual machine backup writes event, management module
20 by IO write corresponding to event Backup Datas write-in disk mirroring file in, meanwhile, management module 20 by IO write event institute it is right
The bitmap data answered synchronously be saved in the disk mirroring file and it is non-caching in, so as to ensure that virtual machine backup when stabilization
Property, while also accordingly improve virtual machine backup efficiency.
It is further alternative, based on above-described embodiment, in another embodiment of bitmap data managing device of the present invention, management
Module 20 is specifically used for：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirror
During as in file, judge that this IO writes whether bitmap data corresponding to event in previous IO writes event has occurred set；
When set does not occur during the bitmap data that this IO is write corresponding to event writes event in previous IO, this IO is judged
Write whether the bitmap data corresponding to event in previous IO writes event has occurred set；When this IO is write corresponding to event
This IO is write the bitmap data corresponding to event and synchronously preserved by bitmap data when set does not occur during previous IO writes event
Into disk mirroring file.
In the present embodiment, to ensure that bitmap data is not lost, therefore bitmap data is recorded in Qcow2 magnetic by management module 20
In disk mirroring file, and by bitmap data real-time synchronization into bitmap data file, then mean each disk write I/O operation
Two IO will be produced：One IO is used for synchronous real-time bitmap data, and another IO is used for virtual machine Backup Data write-in magnetic
Disk, thus this will cause virtual machine performance to decline to a great extent.Therefore, in the present embodiment, management module 20 is handled by judgement to drop
The frequency of low real-time synchronization bitmap data, and then the corresponding performance for lifting virtual machine.
In the present embodiment, write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event
When writing in disk mirroring file, management module 20 first judges that whether this IO writes bitmap data corresponding to event in previous IO
Write and set has occurred in event, wherein, bitmap data set is used for the number for indicating the data area that IO writes the corresponding operation of event
According to having changed, while also illustrate that the bitmap data corresponding to the data area has carried out record preservation.Therefore, if this
In previous IO writes event set does not occur for the bitmap data that IO writes corresponding to event, then this IO is write event by management module 20
Corresponding bitmap data is synchronously saved in disk mirroring file.
In addition, further to reduce the synchronizing frequency during bitmap data preserves, accordingly, it is considered to write data to user
When, write that the probability of duplicate data is very big, namely previous IO write the corresponding operation of event data area and previous identical it is general
Rate is very big, therefore management module 20 determines whether that this IO writes whether bitmap data corresponding to event in previous IO writes thing
Set has occurred in part, and if set does not occur in previous IO writes event for bitmap data that this IO is write corresponding to event,
The bitmap data that then management module 20 is write this IO corresponding to event is synchronously saved in disk mirroring file, so as to further
Reduce the synchronizing frequency of bitmap data.
Further alternative, in one embodiment, management module 20 is additionally operable to：When this IO writes the bitmap corresponding to event
For data when set has occurred during previous IO writes event, this asynchronous IO writes bitmap data corresponding to event to disk mirroring
In file and return；Or, when set has occurred during this IO bitmap datas write corresponding to event write event in previous IO,
This asynchronous IO writes bitmap data corresponding to event into disk mirroring file and returned, as shown in Figure 4.
It is further alternative, in one embodiment, write event in the IO that there is currently virtual machine backup and IO is write into event
When in corresponding Backup Data write-in disk mirroring file, management module 20 writes this IO the bitmap data corresponding to event
It is cached in preset level cache, set judgement is carried out for writing the bitmap data corresponding to event with next IO；And pipe
The bitmap data that reason module 20 is write this IO corresponding to event is cached in preset L2 cache, for being write with next IO
Bitmap data corresponding to event carries out set judgement.
In the present embodiment, it is stored in due to IO to be write to the bitmap data corresponding to event in disk mirroring file, therefore, i.e.,
Make in the case of virtual machine is in abnormal state (such as power down, process exception etc.), bitmap data will not also be lost.Meanwhile this
Embodiment can also further be realized in synchronization bit pattern data before backup and after backup virtual machine performance it is basically identical and without decline,
While so as to stability when ensure that virtual machine backup, the backup efficiency and performance of virtual machine are also accordingly improved.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of bitmap data management method, it is characterised in that institute's bit-map data management method includes：
Monitoring currently writes event with the presence or absence of the IO of virtual machine backup；
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirroring text
When in part, IO is write to the bitmap data corresponding to event and is synchronously saved in the disk mirroring file.
2. bitmap data management method as claimed in claim 1, it is characterised in that described to there is currently virtual machine backup
When IO writes event and IO write in the Backup Data write-in disk mirroring file corresponding to event, IO is write to the position corresponding to event
Diagram data, which is synchronously saved in the disk mirroring file, to be included：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirroring text
When in part, judge that this IO writes whether bitmap data corresponding to event in previous IO writes event has occurred set；
If in previous IO writes event set does not occur for the bitmap data that this IO writes corresponding to event, judge that this IO writes thing
Whether bitmap data corresponding to part in previous IO writes event has occurred set；
If in previous IO writes event set does not occur for the bitmap data that this IO writes corresponding to event, this IO is write into thing
Bitmap data corresponding to part is synchronously saved in the disk mirroring file.
3. bitmap data management method as claimed in claim 2, it is characterised in that described this IO of judgement is write corresponding to event
Bitmap data whether occurred also to include after set in previous IO writes event：
If set has occurred in previous IO writes event for the bitmap data that this IO writes corresponding to event, this asynchronous IO writes
Bitmap data corresponding to event into the disk mirroring file and returns；Or,
If set, this asynchronous IO have occurred in previous IO writes event for the bitmap data that this IO writes corresponding to event
The bitmap data corresponding to event is write into the disk mirroring file and is returned.
4. bitmap data management method as claimed in claim 2, it is characterised in that institute's bit-map data management method is also wrapped
Include：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirroring text
When in part, this IO is write to the bitmap data corresponding to event and is cached in preset level cache, for writing thing with next IO
Bitmap data corresponding to part carries out set judgement；And the bitmap data write this IO corresponding to event be cached to it is preset
In L2 cache, set judgement is carried out for writing the bitmap data corresponding to event with next IO.
5. the bitmap data management method as any one of Claims 1-4, it is characterised in that the disk mirroring text
Part is Qcow2 disk mirroring files, wherein, by being extended to the data head of Qcow2 disk mirroring files and Qcow2 magnetic
Disk mirroring file dilatation, the bitmap data corresponding to event is write for storage IO.
6. a kind of bitmap data managing device, it is characterised in that institute's bit-map data managing device includes：
Monitoring modular, event is write for monitoring the current IO with the presence or absence of virtual machine backup；
Management module, write for writing event in the IO that there is currently virtual machine backup and IO being write to the Backup Data corresponding to event
When entering in disk mirroring file, IO is write to the bitmap data corresponding to event and is synchronously saved in the disk mirroring file.
7. bitmap data managing device as claimed in claim 6, it is characterised in that the management module is specifically used for：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirroring text
When in part, judge that this IO writes whether bitmap data corresponding to event in previous IO writes event has occurred set；
When set does not occur during the bitmap data that this IO is write corresponding to event writes event in previous IO, judge that this IO writes thing
Whether bitmap data corresponding to part in previous IO writes event has occurred set；When this IO writes the bitmap corresponding to event
This IO is write the bitmap data corresponding to event and is synchronously saved in institute by data when set does not occur during previous IO writes event
State in disk mirroring file.
8. bitmap data managing device as claimed in claim 7, it is characterised in that the management module is specifically additionally operable to：
When set has occurred during the bitmap data that this IO is write corresponding to event writes event in previous IO, this asynchronous IO writes
Bitmap data corresponding to event into the disk mirroring file and returns；Or,
When set has occurred during the bitmap data that this IO is write corresponding to event writes event in previous IO, this asynchronous IO
The bitmap data corresponding to event is write into the disk mirroring file and is returned.
9. bitmap data managing device as claimed in claim 7, it is characterised in that the management module is specifically additionally operable to：
Write event in the IO that there is currently virtual machine backup and IO is write to the Backup Data corresponding to event and write disk mirroring text
When in part, this IO is write to the bitmap data corresponding to event and is cached in preset level cache, for writing thing with next IO
Bitmap data corresponding to part carries out set judgement；And the bitmap data write this IO corresponding to event be cached to it is preset
In L2 cache, set judgement is carried out for writing the bitmap data corresponding to event with next IO.
10. the bitmap data managing device as any one of claim 6 to 9, it is characterised in that the disk mirroring text
Part is Qcow2 disk mirroring files, wherein, by being extended to the data head of Qcow2 disk mirroring files and Qcow2 magnetic
Disk mirroring file dilatation, the bitmap data corresponding to event is write for storage IO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710454245.5A CN107391302A (en) | 2017-06-14 | 2017-06-14 | Bitmap data management method and device |
Applications Claiming Priority (1)
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| CN109165118A (en) * | 2018-07-25 | 2019-01-08 | 深信服科技股份有限公司 | A kind of method and its device, equipment, storage medium of virtual machine backup |
| CN109445909A (en) * | 2018-10-31 | 2019-03-08 | 深信服科技股份有限公司 | Backup method, system, terminal and the storage medium of virtual-machine data |
| CN110825497A (en) * | 2019-11-22 | 2020-02-21 | 北京浪潮数据技术有限公司 | Virtual machine startup and shutdown method, device, equipment and medium |
| CN110837441A (en) * | 2019-11-14 | 2020-02-25 | 北京京航计算通讯研究所 | KVM virtual machine backup method based on dirty data bitmap and network block equipment |
| CN110837442A (en) * | 2019-11-14 | 2020-02-25 | 北京京航计算通讯研究所 | KVM virtual machine backup system based on dirty data bitmap and network block equipment |
| CN110955560A (en) * | 2019-11-15 | 2020-04-03 | 北京浪潮数据技术有限公司 | Virtual machine snapshot generation method and system, electronic device and storage medium |
| WO2020088533A1 (en) * | 2018-11-02 | 2020-05-07 | 深信服科技股份有限公司 | Disaster recovery method and apparatus for virtualization platform |
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| CN109165118A (en) * | 2018-07-25 | 2019-01-08 | 深信服科技股份有限公司 | A kind of method and its device, equipment, storage medium of virtual machine backup |
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| CN110837442A (en) * | 2019-11-14 | 2020-02-25 | 北京京航计算通讯研究所 | KVM virtual machine backup system based on dirty data bitmap and network block equipment |
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| CN110825497A (en) * | 2019-11-22 | 2020-02-21 | 北京浪潮数据技术有限公司 | Virtual machine startup and shutdown method, device, equipment and medium |
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Application publication date: 20171124 |