[sheepdog] [PATCH 0/4] add vdi backup and restore support

[Liu Yuan]

On 09/10/2012 12:41 AM, MORITA Kazutaka wrote:
> An incremental backup is useful to reduce backup data size.  This
> series adds support for vdi backup and restore commands.  With theses
> patches, we can create incremental backup files between snapshots as
> follows.
> 
>   $ collie vdi create test 4G
>   $ echo snap1 | collie vdi write test 0 512
>   $ collie vdi snapshot test -s snap1
>   $ echo snap2 | collie vdi write test 0 512
>   $ collie vdi snapshot test -s snap2
> 
>   (create an incremental backup between snap1 and snap2)
>   $ collie vdi backup test -F snap1 -s snap2 /tmp/backup
>   $ collie vdi list
>     Name        Id    Size    Used  Shared    Creation time   VDI id  Copies  Tag
>   s test         1  4.0 GB  4.0 MB  0.0 MB 2012-09-10 01:27   7c2b25     1         snap1
>   s test         2  4.0 GB  4.0 MB  0.0 MB 2012-09-10 01:28   7c2b26     1         snap2
>     test         3  4.0 GB  0.0 MB  4.0 MB 2012-09-10 01:28   7c2b27     1              
> 
>   (restore vdi with the backup file)
>   $ collie vdi restore test -s snap1 /tmp/backup
>   restoring /tmp/backup... done
> 
>   (restored image is created as a new snapshot [id=3])
>   $ collie vdi tree 
>   test---[2012-09-10 01:27]-+-[2012-09-10 01:28]---(you are here)
>                             `-[2012-09-10 01:29]
>   $ collie vdi list
>     Name        Id    Size    Used  Shared    Creation time   VDI id  Copies  Tag
>   s test         1  4.0 GB  4.0 MB  0.0 MB 2012-09-10 01:27   7c2b25     1         snap1
>   s test         2  4.0 GB  4.0 MB  0.0 MB 2012-09-10 01:28   7c2b26     1         snap2
>   s test         3  4.0 GB  4.0 MB  0.0 MB 2012-09-10 01:29   7c2b28     1              
>     test         4  4.0 GB  0.0 MB  4.0 MB 2012-09-10 01:29   7c2b29     1              
>   $ collie vdi read test 0 512 -s 3
>   snap2

Applied, thanks.

Yuan