[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH V8 0/8] add internal snapshot support at block d
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [PATCH V8 0/8] add internal snapshot support at block device level |
Date: |
Wed, 11 Sep 2013 10:41:49 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Am 11.09.2013 um 08:04 hat Wenchao Xia geschrieben:
> This series brings internal snapshot support at block devices level, now we
> have two three methods to do block snapshot lively: 1) backing chain,
> 2) internal one and 3) drive-back up approach.
>
> Comparation:
> Advantages: Disadvantages:
> 1) delta data, taken fast, export, size performance, delete slow.
> 2) taken fast, delete fast, performance, size delta data, format
> 3) performance, export, format taken slow, delta data, size, host
> I/O
>
> I think in most case, saving vmstate in an standalone file is better than
> saving it inside qcow2, So suggest treat internal snapshot as block level
> methods and not encourage user to savevm in qcow2 any more.
>
> Implemention details:
> To avoid trouble, this serial have hide ID in create interfaces, this make
> sure no chaos of ID and name will be introduced by these interfaces.
> There is one patch may be common to Pavel's savvm transaction, patch 1/11,
> others are not quite related. Patch 1/11 will not set errp when no snapshot
> find, since patch 3/11 need to distinguish real error case.
>
> Next steps to better full VM snapshot:
> Improve internal snapshot's export capability.
> Better vmstate saving.
>
> Thanks Kevin to give advisement about how add it in qmp_transaction, oldest
> version comes from Dietmar Maurer.
Thanks, applied to the block branch.
Kevin
- [Qemu-devel] [PATCH V8 0/8] add internal snapshot support at block device level, Wenchao Xia, 2013/09/11
- [Qemu-devel] [PATCH V8 1/8] snapshot: new function bdrv_snapshot_find_by_id_and_name(), Wenchao Xia, 2013/09/11
- [Qemu-devel] [PATCH V8 4/8] qmp: add interface blockdev-snapshot-internal-sync, Wenchao Xia, 2013/09/11
- [Qemu-devel] [PATCH V8 3/8] qmp: add internal snapshot support in qmp_transaction, Wenchao Xia, 2013/09/11
- [Qemu-devel] [PATCH V8 2/8] snapshot: distinguish id and name in snapshot delete, Wenchao Xia, 2013/09/11
- [Qemu-devel] [PATCH V8 5/8] qmp: add interface blockdev-snapshot-delete-internal-sync, Wenchao Xia, 2013/09/11
- [Qemu-devel] [PATCH V8 6/8] hmp: add interface hmp_snapshot_blkdev_internal, Wenchao Xia, 2013/09/11
- [Qemu-devel] [PATCH V8 8/8] qemu-iotests: add 057 internal snapshot for block device test case, Wenchao Xia, 2013/09/11
- [Qemu-devel] [PATCH V8 7/8] hmp: add interface hmp_snapshot_delete_blkdev_internal, Wenchao Xia, 2013/09/11
- Re: [Qemu-devel] [PATCH V8 0/8] add internal snapshot support at block device level,
Kevin Wolf <=