Hi, I found in doc: http://ceph.com/docs/master/start/os-recommendations/ "Putting multiple ceph-osd daemons using XFS or ext4 on the same host will not perform as well as they could." For now recommended filesystem is XFS. This means that for the best performance setup should be 1 OSD per host? -- Regards Dominik -- 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