Ceph

work in progress

• See OSD::handle_pg_(notify|info|log|query) relates to a function that has apparently been replaced by react() methods such as https://github.com/ceph/ceph/blob/master/src/osd/PG.cc#L6040
• pull request
  • http://ceph.com/docs/master/dev/osd_internals/map_message_handling/ says : "OSD::enqueue_op calls PG::queue_op which checks can_discard_request before queueing the op in the op_queue and the PG in the OpWQ."
  • OSD::handle_op calls op_is_discardable which discards disconnected clients
  • "DeletingState allows you to register a callback to be called when the deletion is finally complete. See PG::start_flush. " but start_flush does not directly show a callback registration. When this sentence was written there was a call to register_on_delete which was a method of DeletingState at the time.