[sheepdog-users] Concern about sheepdog performance

Liu Yuan namei.unix at gmail.com
Tue Dec 18 04:21:31 CET 2012

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.


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