Features/VMSnapshotEnchancement: Difference between revisions
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= VM Back up enhancement = | = VM Back up enhancement = | ||
This feature will enhance VM backup functionality, to make it possible taking internal/external snapshots lively, | |||
and make it works better with underlining components such as LVM. | |||
* '''Name:''' [[User:Wenchao|Wenchao Xia]] | |||
* '''Email:''' xiawenc@linux.vnet.ibm.com, xiaxia347os@163.com | |||
= General Summary = | |||
This feature would provide APIs that can do: | |||
* 1 block device live snapshot as internal/external/blank delta data, export sync API for all type. | |||
* 2 vmstate live save as internal/external data, export async API for external data, fix the size problem. | |||
* 3 combination(internal block snapshot + internal vmstate save, internal block snapshot + external vmstate save, external block snapshot external vmstate save). | |||
= Component Details = | |||
Now qemu support block device live external snapshot, live migration to file, static internal block snapshot + internal vmstate save, following are the blanks need to be filled: | |||
* 1 block device live internal snapshot, block device data drain, provide the interfaces in unified style. | |||
* 2 change vmstate save from static to live, fix the problem that size is not predictable, add support to save vmstate to external file format that qemu support(raw, qcow2...). | |||
* 3 an API allow management stack configure the combination. | |||
* 4 qmp/hmp for related information retrieving. | |||
= User Cases = | |||
General goal from backup application persperctive: | |||
Revision as of 08:18, 18 January 2013
VM Back up enhancement
This feature will enhance VM backup functionality, to make it possible taking internal/external snapshots lively, and make it works better with underlining components such as LVM.
- Name: Wenchao Xia
- Email: xiawenc@linux.vnet.ibm.com, xiaxia347os@163.com
General Summary
This feature would provide APIs that can do:
- 1 block device live snapshot as internal/external/blank delta data, export sync API for all type.
- 2 vmstate live save as internal/external data, export async API for external data, fix the size problem.
- 3 combination(internal block snapshot + internal vmstate save, internal block snapshot + external vmstate save, external block snapshot external vmstate save).
Component Details
Now qemu support block device live external snapshot, live migration to file, static internal block snapshot + internal vmstate save, following are the blanks need to be filled:
- 1 block device live internal snapshot, block device data drain, provide the interfaces in unified style.
- 2 change vmstate save from static to live, fix the problem that size is not predictable, add support to save vmstate to external file format that qemu support(raw, qcow2...).
- 3 an API allow management stack configure the combination.
- 4 qmp/hmp for related information retrieving.
User Cases
General goal from backup application persperctive: