On Thu, Jul 19, 2012 at 5:19 AM, Vladimir Bashkirtsev <vladimir@xxxxxxxxxxxxxxx> 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. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
