I think this is related to the sync issues. You could try the josef's git tree:
git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-work.git
Since yesterday I'm using it in our ceph cluster and it seems to do a
better job.
Regards,
Christian
2011/10/9 Martin Mailand mar...@tuxadero.com:
Hi,
I have high IO-Wait on the ods (ceph), the osd are running a v3.1-rc9
kernel.
I also experience high IO-rates, around 500IO/s reported via iostat.
Device: rrqm/s wrqm/s r/s w/srkB/swkB/s
avgrq-sz avgqu-sz await r_await w_await svctm %util
sda
