From: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
To: Fam Zheng <famz@redhat.com>
Cc: kwolf@redhat.com, hbrock@redhat.com, qemu-devel@nongnu.org,
rjones@redhat.com, imain@redhat.com, stefanha@redhat.com,
pbonzini@redhat.com
Subject: Re: [Qemu-devel] [PATCH v2 00/11] Point-in-time snapshot exporting over NBD
Date: Fri, 19 Jul 2013 18:41:59 +0800 [thread overview]
Message-ID: <51E917F7.9000308@linux.vnet.ibm.com> (raw)
In-Reply-To: <1374054136-28741-1-git-send-email-famz@redhat.com>
于 2013-7-17 17:42, Fam Zheng 写道:
> This series adds for point-in-time snapshot NBD exporting based on
> blockdev-backup (variant of drive-backup with existing device as target). This
> patch is built on top of imain's sync mode patches for drive-backup.
>
> We get a thin point-in-time snapshot by COW mechanism of drive-backup, and
> export it through built in NBD server. The steps are as below:
>
Compared with driver-backup, this approach is more flexible in some way,
since user can read the content and copy out what he need, with a
sacrifice of write of old data to temporary file. Overall it seems good.
Dirty change tracking is what miss for a full solution, which
naturally exist in backing chain snapshot.
>
--
Best Regards
Wenchao Xia
next prev parent reply other threads:[~2013-07-19 10:42 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-17 9:42 [Qemu-devel] [PATCH v2 00/11] Point-in-time snapshot exporting over NBD Fam Zheng
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 01/11] block: replace in_use with refcnt_soft and refcnt_hard Fam Zheng
2013-07-17 12:26 ` Paolo Bonzini
2013-07-18 4:53 ` Fam Zheng
2013-07-23 9:36 ` Stefan Hajnoczi
2013-07-23 10:32 ` Fam Zheng
2013-07-23 13:34 ` Stefan Hajnoczi
2013-07-24 0:39 ` Fam Zheng
2013-07-24 7:35 ` Stefan Hajnoczi
2013-07-24 7:44 ` Fam Zheng
2013-07-25 7:52 ` Stefan Hajnoczi
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 02/11] block: use refcnt for bs->backing_hd and bs->file Fam Zheng
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 03/11] block: use refcnt for drive_init/drive_uninit Fam Zheng
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 04/11] block: use refcnt for device attach/detach Fam Zheng
2013-07-23 9:44 ` Stefan Hajnoczi
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 05/11] migration: omit drive ref as we have bdrv_ref now Fam Zheng
2013-07-23 9:49 ` Stefan Hajnoczi
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 06/11] xen_disk: simplify blk_disconnect with refcnt Fam Zheng
2013-07-23 9:50 ` Stefan Hajnoczi
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 07/11] block: hold hard reference for backup/mirror target Fam Zheng
2013-07-23 9:52 ` Stefan Hajnoczi
2013-07-25 6:08 ` Fam Zheng
2013-07-25 7:59 ` Stefan Hajnoczi
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 08/11] block: simplify bdrv_drop_intermediate Fam Zheng
2013-07-24 23:16 ` Jeff Cody
2013-07-25 1:34 ` Fam Zheng
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 09/11] block: add assertion to check refcount before deleting Fam Zheng
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 10/11] block: add option 'backing' to -drive options Fam Zheng
2013-07-17 12:36 ` Paolo Bonzini
2013-07-17 12:58 ` Kevin Wolf
2013-07-17 13:13 ` Paolo Bonzini
2013-07-17 13:48 ` Kevin Wolf
2013-07-17 14:16 ` Paolo Bonzini
2013-07-17 15:09 ` Kevin Wolf
2013-07-17 15:23 ` Paolo Bonzini
2013-07-23 20:07 ` Ian Main
2013-07-22 6:07 ` Fam Zheng
2013-07-23 19:57 ` Ian Main
2013-07-17 9:42 ` [Qemu-devel] [PATCH v2 11/11] qmp: add command 'blockdev-backup' Fam Zheng
2013-07-17 12:44 ` Eric Blake
2013-07-18 4:41 ` Fam Zheng
2013-07-19 10:16 ` Wenchao Xia
2013-07-23 10:10 ` Stefan Hajnoczi
2013-07-19 10:41 ` Wenchao Xia [this message]
2013-07-23 1:52 ` [Qemu-devel] [PATCH v2 00/11] Point-in-time snapshot exporting over NBD Wenchao Xia
2013-07-23 6:35 ` Paolo Bonzini
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