Hi, Oh, when did they switch the default sched to deadline? Thanks for the hint, moved to cfq - tests are running. and finished. Result: No performance difference between mon on ramfs or btrfs. So the problem has to be somewhere else and there is no reason to think further about ramfs. nevertheless - thanks a lot, Fabian -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140524/4d46d020/attachment.htm>