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Hi, we are running a ceph cluster with btrfs as it''s base filesystem (kernel 3.0). At the beginning everything worked very well, but after a few days (2-3) things are getting very slow. When I look at the object store servers I see heavy disk-i/o on the btrfs filesystems (disk utilization is between 60% and 100%). I also did some tracing on the Cepp-Object-Store-Daemon, but I''m