[sheepdog-users] Concern about sheepdog performance

[MORITA Kazutaka]

At Tue, 18 Dec 2012 11:21:31 +0800,
Liu Yuan wrote:
> 
> On 12/18/2012 11:11 AM, Jan Dvořák wrote:
> > Recovery of lost nodes we tested with a similar setup was painfully
> > slow, however.
> > 
> > Take this with a grain of salt, it's been too long.
> 
> Recovery is slow because we don't want recovery process saturate the
> network. Serving in-flight IO during recovery is preferred over
> recovery. I think with this strategy, VMs will feel more smooth disk IO
> during recovery process. Also, there is always conflict between data
> balance and minimal data migration. We prefer data balance, so this
> preference will result in more data migration than necessary.

I think it would be a good idea to add support for multiple NICs and
use a dedicated NIC for object recovery.  Then, we don't have to worry
about network saturation caused by recovery.

Thanks,

Kazutaka