[sheepdog-users] sheepdog replication got stuck

Hitoshi Mitake mitake.hitoshi at gmail.com
Tue Jan 7 15:03:19 CET 2014

At Tue, 7 Jan 2014 15:23:33 +0800,
Liu Yuan wrote:
> On Tue, Jan 07, 2014 at 08:13:21AM +0100, Gerald Richter - ECOS wrote:
> > Hi,
> > 
> > I am pretty sure that the VM were I lost the data, had more than 40 MB changed data.
> > 
> > From what I am seeing here when qemu-img imports the vm is, as long as there is only one import process it works fine. As soon as I am doing multiple imports in parallel the object cache flusher hangs at some point (not always the same point) and nothing gets flushed anymore. When the import is finished qemu-img tries to make a sync, but this hangs because the object cache flush hangs, so the import never ends.
> So this highly indicate a object cache bug for parallel importing. But I am
> currently busy with other stuff.
> Hitoshi, do you have time to dig this problem? If it is reliably reproduciable,
> I think it is not hard to solve.

Yes I'll work on it.


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