CN105068856A - Mirror image snapshooting based on virtual machine backup system and backup method - Google Patents
Mirror image snapshooting based on virtual machine backup system and backup method Download PDFInfo
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- CN105068856A CN105068856A CN201510418691.1A CN201510418691A CN105068856A CN 105068856 A CN105068856 A CN 105068856A CN 201510418691 A CN201510418691 A CN 201510418691A CN 105068856 A CN105068856 A CN 105068856A
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Abstract
The invention provides a mirror image snapshooting based on virtual machine backup system which is used for backing up virtual machine information in a virtual platform. The backup system comprises a backup server, a virtual management module, a mirror image snapshooting module and a snapshot comparison module, wherein the backup server is used for storing backup information of at least one virtual machine; the virtual management module is used for selecting the virtual machines required to be backed up; the mirror image snapshooting module is used for creating snapshots for disk mirror images of the virtual machines; and the snapshot comparison module is used for judging whether backup records of the selected virtual machines exist in the backup server and comparing the existent backup records with the created snapshot information if the backup records exist to store and back up differential information in the backup server. According to the system, the mirror image snapshooting module is utilized for snapshooting the virtual machines as needed, and the differential information is quickly extracted for backup storage when the mirror image snapshots of the virtual machines are not the same as the backup information, so that the utilization efficiency of mirror image storage is improved. Furthermore, the invention provides a backup method.
Description
Technical field
The present invention relates to Intel Virtualization Technology, particularly relate to a kind of virtual machine standby system based on mirror snapshot and backup method.
Background technology
At present; along with the application of cloud computing Intel Virtualization Technology is more and more extensive, a large amount of business is run on the virtual machine of cloud data center, for ensureing the reliability of business datum; virtual machine image backup as a kind of important salvo, use by increasing user.The mode of virtual machine image backup generally adopts the mode based on file system to back up, heap file leaves on local file system, file system can record the attributes such as the modification time of these files, judges whether back up during backup by the amendment attribute of Study document.
But, least unit based on the backup mode of file is file, and the disk mirroring file of virtual machine is all larger, virtual machine has any amendment that whole image file all can be caused to back up completely at every turn, BACKUP TIME is longer, occupy a large amount of network and storage resources, also can affect the utilization factor of virtual machine simultaneously.
Summary of the invention
In view of this, the invention provides a kind of the virtual machine standby system based on mirror snapshot and the backup method that can improve storage resources and virtual machine utilization factor.
A kind of virtual machine standby system based on mirror snapshot, it is for backing up the virtual machine information in virtual platform, the described virtual machine standby system based on mirror snapshot comprises a backup server, a virtualization management module, a mirror snapshot module and a snapshot comparing module, described backup server is for storing the backup information of at least one virtual machine, described virtualization management module is for selecting the virtual machine that need back up, described mirror snapshot module is used for creating snapshot to the disk mirroring of selected virtual machine, described snapshot comparing module for judge selected virtual machine and whether in described backup server, there is duplicated record and duplicated record when there is duplicated record existing for comparison and the SNAPSHOT INFO created with when there are differences by described different information storage backup to described backup server.
Based on a virtual machine backup method for mirror snapshot, it is for backing up the virtual machine information in virtual platform, and the described virtual machine backup method based on mirror snapshot comprises the following steps:
The virtual machine that selection need be backed up;
Snapshot is created to the disk mirroring of selected virtual machine;
Judge selected virtual machine whether there is duplicated record and duplicated record when there is duplicated record existing for comparison and the SNAPSHOT INFO created with when there are differences by described different information storage backup.
Compared with prior art, in virtual machine standby system based on mirror snapshot provided by the invention and method, after utilizing mirror snapshot module to carry out snapshot according to need to virtual machine, and utilize the information of snapshot comparison module virtual machine image snapshot and backup whether identical and rapid extraction different information carries out back-up storage when not identical, decrease BACKUP TIME and storage space, improve the utilization ratio of mirrored storage.
Accompanying drawing explanation
Fig. 1 is the module diagram of the virtual machine standby system based on mirror snapshot provided by the invention.
Fig. 2 is the process flow diagram of the virtual machine backup method based on mirror snapshot provided by the invention.
Main element symbol description
Based on the virtual machine standby system 100 of mirror snapshot
Back-end memory 110
Backup server 120
Virtualization management module 140
Mirror snapshot module 160
Snapshot comparing module 180
Management switch 190a
Backup switch 190b
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, its a kind of virtual machine standby system 100 based on mirror snapshot provided for embodiment of the present invention, it is for backing up the virtual machine information in virtual platform, and the described virtual machine standby system 100 based on mirror snapshot comprises a back-end memory 110, backup server 120, virtualization management module 140, mirror snapshot module 160, snapshot comparing module 180, management switch 190a and backup switch 190b.Described back-end memory 110 is connected with described backup server 120 and communicates, described management switch 190a is connected with described virtualization management module 140, described mirror snapshot module 160 and described backup server 120 respectively and realizes service link interactive communication, and backup switch 190b is connected with described snapshot comparing module 180 and backup server 120 respectively and realizes backup link interactive communication.The virtual machine of virtualization management module 140 in management switch 190a managing virtual platform, in present embodiment, virtual platform comprises two virtual machines A, B.
Back-end memory 110 is connected to backup server 120 local directory corresponding storage area to be loaded into backup server 120, back-end memory 110 is the storage networking carrying out unified management in rear end, if back-end memory 110 is storage area network (StorageAreaNetwork, SAN) or network connect store (NetworkAttachedStorage, NAS).Be understandable that, the relevant backup information that the virtual machine backed up in Storage Virtualization platform in local directory is corresponding.
Backup server 120 is for storing the backup information of at least one virtual machine, and in present embodiment, backup server 120 stores the backup information of virtual machine A, virtual machine B in backup server 120 without duplicated record.After in back-end memory 110 storage area being loaded into the local directory of backup server 120, the local directory being loaded with storage area is shared to snapshot comparing module 180 through backup switch 190b and uses by backup server 120.Be understandable that, local directory is shared by network file system(NFS) (NetworkFileSystem, NFS) by backup server 120.
Virtualization management module 140 selects the virtual machine that need back up according to need in virtual platform through management switch 190a, in present embodiment, virtualization management module 140 selects backup virtual machine A.
Mirror snapshot module 160 is for creating inner snapshot to the disk mirroring of selected virtual machine, in present embodiment, the instrument creating inner snapshot is qemu-img, each magnetic disk of virtual machine mirror image is simulator Copy on write (QEMUCopyOnWrite, QCOW) form, just the method optimizing of memory allocated stores use when needed.
Snapshot comparing module 180 is for judging whether selected virtual machine exists duplicated record in backup server 120, and in present embodiment, selected virtual machine A backs up in backup server 120, there is duplicated record.Whether the duplicated record that virtual machine selected by snapshot comparing module 180 comparison exists identical with created SNAPSHOT INFO, and not identical also namely there are differences time described different information is stored to after backup switch 190b backs up to backup server 120 respective memory regions of back-end memory 110 according to shared local directory.
When there is not duplicated record in the virtual machine of required backup in backup server 120, during as needed backup virtual machine B, because virtual machine B does not exist duplicated record in backup server 120, after snapshot comparing module 180 couples of virtual machine B create snapshot, the SNAPSHOT INFO of establishment is stored to after backup switch 190b full backup to backup server 120 respective memory regions of back-end memory 110 according to shared local directory.
In backup procedure, prevent user from carrying out corresponding operating such as delete, mobile etc. to it for making virtual machine and affect backup procedure, virtualization management module 140 also for locking selected backup virtual machine after selecting the virtual machine that need back up, and after snapshot comparing module 180 is by the respective backup information back-up of locked virtual machine, virtualization management module 140 is removed locked virtual machine and returned to normal operating condition to make virtual machine.In present embodiment, virtualization management module 140 locks virtual machine A, and after the different information of locked virtual machine A is backed up to local directory by snapshot comparing module 180, virtualization management module 140 removes the locking of virtual machine A.
Respective queries is carried out to backed up virtual machine information for convenience of follow-up, backup server 120 also for the compression of the backup information of snapshot comparing module 180 back-up storage pack and create correspondence search index so that search backup information.Compression package information generally comprises the configuration information etc. of compressed package creation-time, size, the disk file title comprised, virtual machine.
Refer to Fig. 2, its a kind of virtual machine backup method based on mirror snapshot provided for embodiment of the present invention, it is for backing up the virtual machine information in virtual platform, and the described virtual machine backup method based on mirror snapshot comprises the following steps:
S110: select the virtual machine that need back up;
S120: the selected backup virtual machine of locking;
S130: snapshot is created to the disk mirroring of selected virtual machine;
S140: judge whether selected virtual machine exists duplicated record, if so, then enters step S150, if not, then enters step S160;
S150: the duplicated record existing for comparison and the SNAPSHOT INFO that creates with when there are differences by described different information storage backup;
S160: by created SNAPSHOT INFO full backup;
S170: remove the virtual machine locked;
S180: by stored backup information compression pack and create correspondence search index.
In step s 110, virtualization management module 140 is utilized to select the virtual machine that need back up according to need.
In the step s 120, virtual management module 140 is utilized to be locked after selected virtual machine by selected virtual machine.
In step s 130, which, utilize the disk mirroring of mirror snapshot module 160 to selected virtual machine to create inner snapshot, in present embodiment, the instrument creating inner snapshot is qemu-img.
In step S140, whether selected virtual machine exists duplicated record in backup server 120 to utilize snapshot comparing module 180 to judge.
In step S150, whether the duplicated record utilizing virtual machine selected by snapshot comparing module 180 comparison to exist identical with created SNAPSHOT INFO, and not identical also namely there are differences time described different information is stored to after backup switch 190b backs up to backup server 120 respective memory regions of back-end memory 110 according to shared local directory.
In step S160, utilize snapshot comparing module 180 by the SNAPSHOT INFO full backup of selected virtual machine creating to the local directory shared.
In step S170, utilize virtual management module 140 to be unlocked by the virtual machine of locking, return to normal operating condition to make virtual machine.
In step S180, utilize backup server 120 by the backup information of snapshot comparing module 180 back-up storage compression pack and create correspondence search index so that search backup information.
In virtual machine standby system 100 based on mirror snapshot provided by the invention and method, after utilizing mirror snapshot module 160 to carry out mirror snapshot according to need to the virtual machine that need back up, back-up storage is carried out again through snapshot comparing module 180 rapid extraction different information when virtual machine image snapshot and the backup information stored are not identical, vacant extra data space, improve the utilization ratio of the mirrored storage of whole system, be supplied to virtual platform carry with unified interface after rear end storage area is connected by backup server 120 to use, shield the difference of rear end storage protocol, easy to operate.Simultaneously, Backup Data flows all in virtual platform transfers to backup server 120 by backup switch 190b, management switch 190a and virtual switch 190b, by the supervising the network of virtual platform and data network isolation, ensures the safety and stablization of backup procedure and virtual machine own service.
Be understandable that, for the person of ordinary skill of the art, other various corresponding change and distortion can be made by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.
Claims (10)
1. based on a virtual machine standby system for mirror snapshot, it is for backing up the virtual machine information in virtual platform, and the described virtual machine standby system based on mirror snapshot comprises:
A backup server, it is for storing the backup information of at least one virtual machine;
A virtualization management module, it is for selecting the virtual machine that need back up;
A mirror snapshot module, it is for creating snapshot to the disk mirroring of selected virtual machine;
A snapshot comparing module, its for judge selected virtual machine and whether in described backup server, there is duplicated record and duplicated record when there is duplicated record existing for comparison and the SNAPSHOT INFO created with when there are differences by described different information storage backup to described backup server.
2. as claimed in claim 1 based on the virtual machine standby system of mirror snapshot, it is characterized in that, the described virtual machine standby system based on mirror snapshot also comprises a back-end memory, described back-end memory is connected to described backup server the local directory corresponding storage area to be loaded into described backup server, and described different information is stored to the respective memory regions of back-end memory by described snapshot comparing module through described backup server according to local directory.
3. as claimed in claim 1 based on the virtual machine standby system of mirror snapshot, it is characterized in that, the described virtual machine standby system based on mirror snapshot comprises a backup switch, and described snapshot comparing module backs up to described backup server through the virtual machine information that described backup switch need back up.
4. as claimed in claim 1 based on the virtual machine standby system of mirror snapshot, it is characterized in that, when described snapshot comparing module judges that the virtual machine of required backup does not exist duplicated record in described backup server by the SNAPSHOT INFO full backup of described mirror snapshot module creation to described backup server.
5. as claimed in claim 1 based on the virtual machine standby system of mirror snapshot, it is characterized in that, described virtualization management module also for locking selected backup virtual machine and remove locked virtual machine after described snapshot comparing module being by the respective backup information back-up of locked virtual machine after selecting the virtual machine that need back up.
6., as claimed in claim 5 based on the virtual machine standby system of mirror snapshot, it is characterized in that, described backup server also for the compression of the backup information of described snapshot comparing module back-up storage pack and create correspondence search index.
7., based on a virtual machine backup method for mirror snapshot, it is for backing up the virtual machine information in virtual platform, and the described virtual machine backup method based on mirror snapshot comprises the following steps:
The virtual machine that selection need be backed up;
Snapshot is created to the disk mirroring of selected virtual machine;
Judge selected virtual machine whether there is duplicated record and duplicated record when there is duplicated record existing for comparison and the SNAPSHOT INFO created with when there are differences by described different information storage backup.
8., as claimed in claim 7 based on the virtual machine backup method of mirror snapshot, it is characterized in that, further comprising the steps of in described determining step:
When there is not duplicated record in selected virtual machine by created SNAPSHOT INFO full backup.
9., as claimed in claim 1 based on the virtual machine backup method of mirror snapshot, it is characterized in that, further comprising the steps of in selection step:
The selected backup virtual machine of locking;
Correspondingly further after determining step to comprise the following steps:
Remove the virtual machine locked.
10., as claimed in claim 9 based on the virtual machine backup method of mirror snapshot, it is characterized in that, further comprising the steps of after described releasing step:
By stored backup information compression pack and create correspondence search index.
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| CN115098300B (en) * | 2022-06-28 | 2024-01-02 | 江苏安超云软件有限公司 | Database backup method, disaster recovery method, device and equipment |
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