I know single bucket has performance question from 
http://tracker.ceph.com/issues/8473 

I  attempt to modify crush map that put bucket.index pool to ssd. but 
performance is not good, and ssd performance never utilize.
this is op description,can you give me some  suggests to  improve performance: 

{ "description": "osd_op(client.193591.0:1185637 .dir.zone.192482.4 [] 
8.8cd2dea4 ack+ondisk+write e2007)",
          "received_at": "2015-01-14 15:05:15.888245",
          "age": "357.891900",
          "duration": "25.215902",
          "type_data": [
                "commit sent; apply or cleanup",
                { "client": "client.193591",
                  "tid": 1185637},
                [
                    { "time": "2015-01-14 15:05:15.888387",
                      "event": "waiting_for_osdmap"},
                    { "time": "2015-01-14 15:05:18.265420",
                      "event": "reached_pg"},
                    { "time": "2015-01-14 15:05:18.265457",
                      "event": "started"},
                    { "time": "2015-01-14 15:05:18.265462",
                      "event": "started"},
                    { "time": "2015-01-14 15:05:18.267986",
                      "event": "waiting for subops from 43,109"},
                    { "time": "2015-01-14 15:05:18.268131",
                      "event": "commit_queued_for_journal_write"},
                    { "time": "2015-01-14 15:05:18.268314",
                      "event": "write_thread_in_journal_buffer"},
                    { "time": "2015-01-14 15:05:18.268558",
                      "event": "journaled_completion_queued"},
                    { "time": "2015-01-14 15:05:18.281863",
                      "event": "sub_op_commit_rec"},
                    { "time": "2015-01-14 15:05:18.281903",
                      "event": "sub_op_commit_rec"},
                    { "time": "2015-01-14 15:05:18.299665",
                      "event": "op_commit"},
                    { "time": "2015-01-14 15:05:18.299731",
                      "event": "commit_sent"},
                    { "time": "2015-01-14 15:05:41.104126",
                      "event": "op_applied"},
                    { "time": "2015-01-14 15:05:41.104147",
                      "event": "done"}]]},




baijia...@126.com
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