[sheepdog-users] Different write speed between vdi

[Liu Yuan]

On Mon, Aug 12, 2013 at 09:21:17AM +0200, Valerio Pachera wrote:
> 2013/8/12 Liu Yuan <namei.unix at gmail.com>:
> > This is what copy-on-write takes from you when it saves you a lot of space by
> > sharing objects between snapshots.
> 
> Confirmed.
> I've been taking a snapshot of vdi 'backup' and write speed dop down to ~6 M/s.

Note, only first write will be slowed down. After that, performace will go as
normal as non-cloned vdi.

>
> Do you also confirm the the write speed do not decrease, increasing
> the number of snapshots? (inversely proportional).
> (From what I see, it doesn't change).

vdi snapshot number doesn't affect performance of any vdi on the snapshot chain.

Thanks
Yuan