[Sheepdog] [PATCH 07/10] sheep: cleanup nr_copies handling

[Christoph Hellwig]

On Mon, Apr 30, 2012 at 04:08:00PM +0900, MORITA Kazutaka wrote:
> We planned to support a different redundancy level for each VDI.
> For example:
> 
>  $ collie vdi create test 1G --copies 1  # no redundancy (for temporary VDIs)
>  $ collie vdi create test 1G --copies 5  # 5 copies (for important VDIs)
>  $ collie vdi create test 1G             # use a default redundancy level,
>                                          # which is specified when formatting cluster
> 
> inode->nr_copies was the number of copies of the VDI, and
> sys->nr_copies was the default redundancy level.
> 
> However, it required a big change in recovery code, so I left it
> untouched at the time.  For now, I think we should use sys->nr_copies
> for every places, and make nr_copies in sheepdog_inode and sd_*_req
> reserved fields.

Makes sense.  I'll submit a patch to do that.