Re: [Qemu-devel] [PATCH v2 00/11] Point-in-time snapshot exporting over NBD

[Wenchao Xia]

于 2013-7-19 18:41, Wenchao Xia 写道:
> 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.
> 
>>
> 
> 
  Any one is doing dirty tracking feature? If no, I'd like to draft a
version based on add-cow.

-- 
Best Regards

Wenchao Xia