[pve-devel] iothread

[Michael Rasmussen]

On Fri, 19 Aug 2016 05:43:52 +0200 (CEST)
Alexandre DERUMIER <aderumier at odiso.com> wrote:

> just tested from ceph to ceph, with iothread enabled, indeed it's hanging the qemu process when doing the switch to new disk.
> data copy itself seem to works.
> I think this is a qemu bug, it should work.
> 
The move disk operation is hitting the same problem as backup with
dataplane.

> 
> Well, this is the 2 only things that didn't work currently. I don't think it's "useless".
> Personnaly, I'm using iothread with big databases on ceph, where I need a lot of iops for database journal disk, database datas disk,....
> 
I see a usecase for high iops requirement and especially when storage
is ceph but for enterprise and/or HA usage in generel it is a disaster
waiting to happen if moving a disk between storage pools is not
supported and taking backup is not allowed.
 
-- 
Hilsen/Regards
Michael Rasmussen

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