I've added a blueprint for avoiding double-writes when using btrfs: http://wiki.ceph.com/01Planning/02Blueprints/Emperor/osd:_clone_from_journal_on_btrfs This should improve throughput significantly when the journal is a file in btrfs. --- Also, there's one for improving the localized read behavior: http://wiki.ceph.com/01Planning/02Blueprints/Emperor/librados%2F%2Fobjecter%3A_smarter_localized_reads For example, for read-only parents of rbd clones, we may as well read from the replica in the same host or rack or row--whatever crush can tell us--and not the primary. This is good for locality and load distribution when certain object sets are hot. -- 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
