[sheepdog] [PATCH v8 00/19] object reclaim based on generational reference counting

[Liu Yuan]

On Fri, May 16, 2014 at 12:22:27AM +0900, Hitoshi Mitake wrote:
> The object reclaim doesn't support hypervolume yet. But hypervolume cannot be
> used as a virtual disk (both of qemu and tgt don't support it) currently. And
> the removal of old vdi deletion is acceptable for hypervolume because it doesn't
> support snapshot, etc. So I think this patchset can be applied to the master
> branch.
> 
> The same code is pushed to:
> https://github.com/sheepdog/sheepdog/tree/snapshot-object-reclaim
> 
> There is a problem which can be caused by discard operation. But the
> problem can be solved as an individual topic. I'll post a patchset for
> it later.
> 
> The leak problem was (also) caused by bugs in QEMU's sheepdog
> driver. The fixed version of QEMU driver is here:
>  https://github.com/sheepdog/qemu/tree/inode-sync
> I'll post it to the QEMU list later.
> 
> v8:
>  - let COW and snapshot be excluded mutually
>  -- This change introduces limitation that "dog vdi snapshot" must be
>     executed on a same node which execute QEMU. But it is temporal and
>     removed easily.

What happens if I run 'dog vdi snapsht' on node B while VM runs on node A?

Thanks
Yuan