On 20/07/2012 1:22 AM, Tommi Virtanen wrote:
On Thu, Jul 19, 2012 at 5:19 AM, Vladimir Bashkirtsev
<vladi...@bashkirtsev.com> wrote:
Look like that osd.0 performs with low latency but osd.1 latency is way too
high and on average it appears as 200ms. osd is backed by btrfs over LVM2.
May be issue lie in backing fs selection? All four osds running similar
Our typical experience with btrfs right now seems to be that it works
fast when the filesystem is fresh, but as it ages, it starts to have
higher and higher delays on syncing writes. This does not seem to be
completely deterministic, that is, if you run many btrfs'es, the
symptoms start to appear at different times on different instances.
I would suspect it as well but all btrfs are relatively fresh as we have
moved ceph from test bed to a production environment.
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
