RE: OSD's slow down to a crawl

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Hi Sage,

I've tried to reproduce the error again with logging on every OSD and got the above. RADOS bench had stalled on a write request like the last time and the attached log is the grep'd OSD log (# cat osd.25.log | grep client.9501.0:744 > freeze.log) . The OSD that stalled was 25, pg map is below -

# ceph pg map 6.5d83495b
osdmap e3775 pg 6.5d83495b (6.95b) -> up [25,31] acting [25,31]


I hope that's what you were after, if not just let me know

Thanks again
-Matt


-----Original Message-----
From: Sage Weil [mailto:sage@xxxxxxxxxxx] 
Sent: Friday, 21 December 2012 1:14 AM
To: Matthew Anderson
Cc: 'Mark Nelson'; ceph-devel@xxxxxxxxxxxxxxx
Subject: RE: OSD's slow down to a crawl

On Thu, 20 Dec 2012, Matthew Anderson wrote:
> Hi Sage,
> 
> Logs are attached. I took the osd logs from osd.24 as this is the 
> first osd in my SSD pool I've been testing with previously.
> 
> The 4MB bench I was able to reproduce the fault by restarting my rbd 
> export which stalled after a few percent complete. When I ran the 4MB 
> bench it stalled early on and never received a response back from the 
> OSD and I terminated it after 60 seconds or so. I wasn't able to 
> reproduce the fault using the 4kb io size. The 4kb log should show 
> rados bench completing normally at a respectable speed of about 1MB/s.

Let's drill into the hang.. up until that point things look okay.

2012-12-21 00:51:26.033622 7f6f3c042760  1 -- 172.16.0.13:0/1023886 --> 172.16.0.13:6813/22233 -- osd_op(client.9503.0:185 benchmark_data_KVM04_23886_object184 [write 0~4194304] 6.3ca4346e) v4 -- ?+0 0x171ea50 con 0x171a7e0

Do you have a log for that OSD so we can see what happened there?  It may also be that the replicated write is hung.  If you do

 ceph pg map 6.3ca4346e

you can see all OSDs storing that PG.  And/or you can grep for
client.9503.0:185 in 172.16.0.13:6813/22233's log and see whether the sub_op was sent.

Thanks!
sage


> 
> Thanks
> -Matt
> 
> -----Original Message-----
> From: ceph-devel-owner@xxxxxxxxxxxxxxx 
> [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Sage Weil
> Sent: Friday, 21 December 2012 12:30 AM
> To: Matthew Anderson
> Cc: 'Mark Nelson'; ceph-devel@xxxxxxxxxxxxxxx
> Subject: RE: OSD's slow down to a crawl
> 
> Can you do a similar test, but with full logging on?
> 
>  ceph tell osd.0 injectargs '--debug-ms 1 --debug-filestore 20 
> --debug-osd
> 20 --debug-journal 20'
>  rados -p ssd bench 30 write -b 4096 -t 1 --log-file /tmp/foo 
> --debug-ms 1
> 
> That will be a single IO in flight at a time and very easy to trace through the logs.  If you can post the resulting log file (/tmp/foo and from osd.0), that would be awesome.
> 
> Thanks!
> sage
> 
> 
> 
> On Thu, 20 Dec 2012, Matthew Anderson wrote:
> 
> > # rados bench 60 write -t 256 -p ssd  Maintaining 256 concurrent 
> > writes of 4194304 bytes for at least 60 seconds.
> >  Object prefix: benchmark_data_KVM03_12985
> >    sec Cur ops   started  finished  avg MB/s  cur MB/s  last lat   avg lat
> >      0       0         0         0         0         0         -         0
> >      1      45        45         0         0         0         -         0
> >      2      71        71         0         0         0         -         0
> >      3      90        90         0         0         0         -         0
> >      4     125       125         0         0         0         -         0
> >      5     136       136         0         0         0         -         0
> >      6     144       144         0         0         0         -         0
> >      7     175       175         0         0         0         -         0
> >      8     201       201         0         0         0         -         0
> >      9     217       217         0         0         0         -         0
> >     10     228       228         0         0         0         -         0
> >     11     251       251         0         0         0         -         0
> >     12     255       266        11   3.66581   3.66667   11.7027   11.6013
> >     13     255       271        16   4.92194        20   12.9795   11.9979
> >     14     255       291        36   10.2833        80   13.1795   12.6478
> >     15     255       301        46   12.2639        40   13.9424   12.9123
> >     16     255       303        48   11.9973         8   14.0277   12.9579
> >     17     255       321        66    15.526        72   15.1408   13.4616
> >     18     255       345        90   19.9956        96   15.5673   13.9937
> >     19     255       349        94   19.7851        16    15.707   14.0635
> > 2012-12-21 00:06:37.198982min lat: 11.4904 max lat: 16.4053 avg lat: 14.3121
> >    sec Cur ops   started  finished  avg MB/s  cur MB/s  last lat   avg lat
> >     20     255       361       106   21.1953        48   16.4053   14.3121
> >     21     255       367       112   21.3285        24   17.4263   14.4795
> >     22     255       370       115   20.9043        12   17.3579   14.5544
> >     23     255       387       132   22.9513        68   18.3185   15.0867
> >     24     255       394       139   23.1614        28   18.2868   15.2504
> >     25     255       404       149   23.8346        40    18.741   15.5048
> >     26     255       410       155   23.8407        24    19.032   15.6358
> >     27     255       410       155   22.9577         0         -   15.6358
> >     28     255       410       155   22.1378         0         -   15.6358
> >     29     255       411       156   21.5124   1.33333   22.6927   15.6811
> >     30     255       431       176   23.4614        80   22.6577   16.4822
> >     31     255       447       192   24.7687        64   23.2345   17.0563
> >     32     255       464       209   26.1192        68   23.3788   17.5859
> >     33     255       485       230   27.8726        84   22.8924   18.1122
> >     34     255       497       242   28.4642        48    23.563   18.3693
> >     35     255       508       253   28.9078        44   23.0516   18.5935
> >     36     255       514       259   28.7713        24   24.4415   18.7278
> >     37     255       530       275    29.723        64    23.847   19.0424
> >     38     255       541       286   30.0985        44   24.5757   19.2427
> >     39     255       544       289   29.6344        12   24.6802   19.2984
> > 2012-12-21 00:06:57.203473min lat: 11.4904 max lat: 24.6802 avg lat: 19.2984
> >    sec Cur ops   started  finished  avg MB/s  cur MB/s  last lat   avg lat
> >     40     255       544       289   28.8935         0         -   19.2984
> >     41     255       544       289   28.1888         0         -   19.2984
> >     42     255       544       289   27.5176         0         -   19.2984
> >     43     255       544       289   26.8776         0         -   19.2984
> >     44     255       544       289   26.2668         0         -   19.2984
> >     45     255       544       289   25.6831         0         -   19.2984
> >     46     255       544       289   25.1248         0         -   19.2984
> >     47     255       544       289   24.5902         0         -   19.2984
> >     48     255       544       289   24.0779         0         -   19.2984
> >     49     255       544       289   23.5865         0         -   19.2984
> >     50     255       544       289   23.1148         0         -   19.2984
> >     51     255       544       289   22.6616         0         -   19.2984
> >     52     255       544       289   22.2258         0         -   19.2984
> >     53     255       544       289   21.8065         0         -   19.2984
> >     54     255       544       289   21.4026         0         -   19.2984
> >     55     255       544       289   21.0135         0         -   19.2984
> >     56     255       544       289   20.6383         0         -   19.2984
> >     57     255       544       289   20.2762         0         -   19.2984
> >     58     255       544       289   19.9266         0         -   19.2984
> >     59     255       544       289   19.5889         0         -   19.2984
> > 2012-12-21 00:07:17.207782min lat: 11.4904 max lat: 24.6802 avg lat: 19.2984
> >    sec Cur ops   started  finished  avg MB/s  cur MB/s  last lat   avg lat
> >     60     255       544       289   19.2624         0         -   19.2984
> >     61     255       544       289   18.9466         0         -   19.2984
> >     62     255       544       289    18.641         0         -   19.2984
> >     63     255       544       289   18.3452         0         -   19.2984
> >     64     255       544       289   18.0585         0         -   19.2984
> >     65     255       544       289   17.7807         0         -   19.2984
> >     66     255       544       289   17.5113         0         -   19.2984
> >     67     133       545       412   24.5916   17.5714   37.3574   27.4834
> >  Total time run:         68.000740
> > Total writes made:      545
> > Write size:             4194304
> > Bandwidth (MB/sec):     32.058 
> > 
> > Stddev Bandwidth:       26.8837
> > Max bandwidth (MB/sec): 96
> > Min bandwidth (MB/sec): 0
> > Average Latency:        29.2801
> > Stddev Latency:         11.9768
> > Max latency:            52.6277
> > Min latency:            11.4904
> > 
> > 
> > 
> > 
> >     
> > ----Original Message-----
> > From: Mark Nelson [mailto:mark.nelson@xxxxxxxxxxx]
> > Sent: Thursday, 20 December 2012 11:59 PM
> > To: Matthew Anderson
> > Cc: ceph-devel@xxxxxxxxxxxxxxx
> > Subject: Re: OSD's slow down to a crawl
> > 
> > Out of curiosity, if you fire up a rados bench instance on one of the nodes with say, 256 concurrent writes, do any of the writes complete?
> > 
> > Mark
> > 
> > On 12/20/2012 09:51 AM, Matthew Anderson wrote:
> > > Hi Mark,
> > >
> > > Thanks for the quick reply. The log was 380MB in total so I just posted last 200 lines hoping that a trained eye might be able to spot something. I'm happy to put the file up on a web server if anyone wants to review it in full.
> > >
> > > It doesn't appear to be memory or CPU related. In it's hung state (both read and write are not responding at the moment, I have a VM hung trying to shutdown and an rbd stuck exporting ) all of the OSD's sit around 0.3% CPU usage, ~300MB of ram and no IO wait. The server has roughly 40GB RAM free and is easily 90% idle. Iotop shows no IO coming from any of the Ceph-OSD's.
> > >
> > > The admin socket showed no ops in flight but the performance dump, perhistoric ops and config are below. I did notice that the age of some of the ops was quite high considering things were actively trying to write to the cluster.
> > > # ceph --admin-daemon ./ceph-osd.24.asok perf dump
> > >
> > > {"filestore":{"journal_queue_max_ops":500,"journal_queue_ops":0,"j
> > > ou
> > > rn
> > > al_ops":20868,"journal_queue_max_bytes":104857600,"journal_queue_b
> > > yt
> > > es
> > > ":0,"journal_bytes":1710397238,"journal_latency":{"avgcount":20868,"
> > > su
> > > m":185.268022000},"journal_wr":13354,"journal_wr_bytes":{"avgcount":
> > > 13
> > > 354,"sum":1770647552},"op_queue_max_ops":500,"op_queue_ops":0,"ops":
> > > 20
> > > 868,"op_queue_max_bytes":104857600,"op_queue_bytes":0,"bytes":1710
> > > 23
> > > 25
> > > 83,"apply_latency":{"avgcount":20868,"sum":508.896737000},"committing"
> > > :0,"commitcycle":339,"commitcycle_interval":{"avgcount":339,"sum":
> > > 17
> > > 08
> > > .284725000},"commitcycle_latency":{"avgcount":339,"sum":13.2418500
> > > 00
> > > },
> > > "journal_full":0},"mutex-FileJournal::completions_lock":{"wait":{"
> > > av
> > > gc
> > > ount":0,"sum":0.000000000}},"mutex-FileJournal::finisher_lock":{"wait"
> > > :{"avgcount":0,"sum":0.000000000}},"mutex-FileJournal::write_lock"
> > > :{
> > > "w
> > > ait":{"avgcount":0,"sum":0.000000000}},"mutex-FileJournal::writeq_
> > > lo
> > > ck
> > > ":{"wait":{"avgcount":0,"sum":0.000000000}},"mutex-JOS::ApplyManager::
> > > apply_lo
> >  ck":{"wai
> > t":{"avgcount":0,"sum":0.000000000}},"mutex-JOS::ApplyManager::com_l
> > oc 
> > k":{"wait":{"avgcount":0,"sum":0.000000000}},"mutex-JOS::SubmitManag
> > er 
> > ::lock":{"wait":{"avgcount":0,"sum":0.000000000}},"osd":{"opq":0,"op
> > _w 
> > ip":0,"op":31753,"op_in_bytes":797806224,"op_out_bytes":1728414048,"
> > op 
> > _latency":{"avgcount":31753,"sum":82.183373000},"op_r":24945,"op_r_o
> > ut
> > _bytes":1728414048,"op_r_latency":{"avgcount":24945,"sum":16.8336890
> > 00 
> > },"op_w":6808,"op_w_in_bytes":797806224,"op_w_rlat":{"avgcount":6808,"
> > sum":38.223006000},"op_w_latency":{"avgcount":6808,"sum":65.34968400
> > 0} 
> > ,"op_rw":0,"op_rw_in_bytes":0,"op_rw_out_bytes":0,"op_rw_rlat":{"avg
> > co
> > unt":0,"sum":0.000000000},"op_rw_latency":{"avgcount":0,"sum":0.0000
> > 00 
> > 000},"subop":5700,"subop_in_bytes":813224156,"subop_latency":{"avgco
> > un 
> > t":5700,"sum":26.877085000},"subop_w":0,"subop_w_in_bytes":813224156,"
> > subop_w_latency":{"avgcount":5700,"sum":26.877085000},"subop_pull":0,"
> > subop_pull_latency":{"avgcount":0,"sum":0.000000000},"subop_push":0,
> > "s
> > ubop_push_
> >  in_bytes"
> > :0,"subop_push_latency":{"avgcount":0,"sum":0.000000000},"pull":0,"p
> > us
> > h":0,"push_out_bytes":0,"push_in":0,"push_in_bytes":0,"recovery_ops"
> > :0 
> > ,"loadavg":359,"buffer_bytes":0,"numpg":2486,"numpg_primary":1214,"n
> > um 
> > pg_replica":1272,"numpg_stray":0,"heartbeat_to_peers":4,"heartbeat_f
> > ro 
> > m_peers":0,"map_messages":44,"map_message_epochs":184,"map_message_e
> > po 
> > ch_dups":174},"throttle-filestore_bytes":{"val":0,"max":104857600,"g
> > et
> > ":0,"get_sum":0,"get_or_fail_fail":0,"get_or_fail_success":0,"take":
> > 20 
> > 868,"take_sum":1710397238,"put":13354,"put_sum":1710397238,"wait":{"
> > av
> > gcount":0,"sum":0.000000000}},"throttle-filestore_ops":{"val":0,"max":
> > 500,"get":0,"get_sum":0,"get_or_fail_fail":0,"get_or_fail_success":0,"
> > take":20868,"take_sum":20868,"put":13354,"put_sum":20868,"wait":{"av
> > gc
> > ount":0,"sum":0.000000000}},"throttle-msgr_dispatch_throttler-client":
> > {"val":0,"max":104857600,"get":31657,"get_sum":795546573,"get_or_fai
> > l_ 
> > fail":0,"get_or_fail_success":0,"take":0,"take_sum":0,"put":31657,"p
> > ut
> > _sum":7955
> >  46573,"wa
> > it":{"avgcount":0,"sum":0.000000000}},"throttle-msgr_dispatch_thrott
> > le 
> > r-cluster":{"val":0,"max":104857600,"get":18913,"get_sum":828011293,
> > "g 
> > et_or_fail_fail":0,"get_or_fail_success":0,"take":0,"take_sum":0,"put"
> > :18913,"put_sum":828011293,"wait":{"avgcount":0,"sum":0.000000000}},
> > "t 
> > hrottle-msgr_dispatch_throttler-hbclient":{"val":0,"max":104857600,"
> > ge 
> > t":4260,"get_sum":200220,"get_or_fail_fail":0,"get_or_fail_success":
> > 0,
> > "take":0,"take_sum":0,"put":4260,"put_sum":200220,"wait":{"avgcount"
> > :0 
> > ,"sum":0.000000000}},"throttle-msgr_dispatch_throttler-hbserver":{"v
> > al 
> > ":0,"max":104857600,"get":4236,"get_sum":199092,"get_or_fail_fail":0,"
> > get_or_fail_success":0,"take":0,"take_sum":0,"put":4236,"put_sum":19
> > 90 
> > 92,"wait":{"avgcount":0,"sum":0.000000000}},"throttle-osd_client_byt
> > es 
> > ":{"val":0,"max":524288000,"get":31308,"get_sum":795353720,"get_or_f
> > ai 
> > l_fail":0,"get_or_fail_success":0,"take":0,"take_sum":0,"put":37671,
> > "p ut_sum":795353720,"wait":{"avgcount":0,"sum":0.000000000}}}
> > >
> > > # ceph --admin-daemon ./ceph-osd.24.asok dump_historic_ops
> > >
> > >         { "description": "osd_op(client.7636.0:101498 rb.0.122c.6b8b4567.000000000357 [write 3600384~4096] 6.42463fe3)",
> > >            "received_at": "2012-12-20 23:34:42.012131",
> > >            "age": "75.428051",
> > >            "duration": "0.009988",
> > >            "flag_point": "waiting for sub ops",
> > >            "client_info": { "client": "client.7636",
> > >                "tid": 101498},
> > >            "events": [
> > >                  { "time": "2012-12-20 23:34:42.012317",
> > >                    "event": "waiting_for_osdmap"},
> > >                  { "time": "2012-12-20 23:34:42.012425",
> > >                    "event": "reached_pg"},
> > >                  { "time": "2012-12-20 23:34:42.012678",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:34:42.012720",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:34:42.012815",
> > >                    "event": "sub_op_sent"},
> > >                  { "time": "2012-12-20 23:34:42.012958",
> > >                    "event": "commit_queued_for_journal_write"},
> > >                  { "time": "2012-12-20 23:34:42.013033",
> > >                    "event": "write_thread_in_journal_buffer"},
> > >                  { "time": "2012-12-20 23:34:42.013745",
> > >                    "event": "journaled_completion_queued"},
> > >                  { "time": "2012-12-20 23:34:42.013803",
> > >                    "event": "op_commit"},
> > >                  { "time": "2012-12-20 23:34:42.017414",
> > >                    "event": "sub_op_commit_rec"},
> > >                  { "time": "2012-12-20 23:34:42.022066",
> > >                    "event": "op_applied"},
> > >                  { "time": "2012-12-20 23:34:42.022119",
> > >                    "event": "done"}]},
> > >          { "description": "osd_sub_op_reply(client.7636.0:101498 6.1fe3 42463fe3\/rb.0.122c.6b8b4567.000000000357\/head\/\/6 [] ondisk, result = 0)",
> > >            "received_at": "2012-12-20 23:34:42.017048",
> > >            "age": "75.423134",
> > >            "duration": "0.000411",
> > >            "flag_point": "started",
> > >            "events": [
> > >                  { "time": "2012-12-20 23:34:42.017218",
> > >                    "event": "waiting_for_osdmap"},
> > >                  { "time": "2012-12-20 23:34:42.017363",
> > >                    "event": "reached_pg"},
> > >                  { "time": "2012-12-20 23:34:42.017401",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:34:42.017459",
> > >                    "event": "done"}]},
> > >          { "description": "osd_op(client.7636.0:101502 rb.0.122c.6b8b4567.000000000064 [write 1512448~61440] 6.a241e34d)",
> > >            "received_at": "2012-12-20 23:34:49.851021",
> > >            "age": "67.589161",
> > >            "duration": "0.007114",
> > >            "flag_point": "waiting for sub ops",
> > >            "client_info": { "client": "client.7636",
> > >                "tid": 101502},
> > >            "events": [
> > >                  { "time": "2012-12-20 23:34:49.851276",
> > >                    "event": "waiting_for_osdmap"},
> > >                  { "time": "2012-12-20 23:34:49.851429",
> > >                    "event": "reached_pg"},
> > >                  { "time": "2012-12-20 23:34:49.851616",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:34:49.851648",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:34:49.851712",
> > >                    "event": "sub_op_sent"},
> > >                  { "time": "2012-12-20 23:34:49.851770",
> > >                    "event": "commit_queued_for_journal_write"},
> > >                  { "time": "2012-12-20 23:34:49.851915",
> > >                    "event": "write_thread_in_journal_buffer"},
> > >                  { "time": "2012-12-20 23:34:49.853956",
> > >                    "event": "journaled_completion_queued"},
> > >                  { "time": "2012-12-20 23:34:49.853992",
> > >                    "event": "op_commit"},
> > >                  { "time": "2012-12-20 23:34:49.857016",
> > >                    "event": "sub_op_commit_rec"},
> > >                  { "time": "2012-12-20 23:34:49.858077",
> > >                    "event": "op_applied"},
> > >                  { "time": "2012-12-20 23:34:49.858135",
> > >                    "event": "done"}]},
> > >          { "description": "osd_sub_op_reply(client.7636.0:101502 6.234d a241e34d\/rb.0.122c.6b8b4567.000000000064\/head\/\/6 [] ondisk, result = 0)",
> > >            "received_at": "2012-12-20 23:34:49.856762",
> > >            "age": "67.583420",
> > >            "duration": "0.000308",
> > >            "flag_point": "started",
> > >            "events": [
> > >                  { "time": "2012-12-20 23:34:49.856869",
> > >                    "event": "waiting_for_osdmap"},
> > >                  { "time": "2012-12-20 23:34:49.856969",
> > >                    "event": "reached_pg"},
> > >                  { "time": "2012-12-20 23:34:49.857001",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:34:49.857070",
> > >                    "event": "done"}]},
> > >          { "description": "osd_op(client.7636.0:101504 rb.0.122c.6b8b4567.00000000012c [write 1658880~2048] 6.92d2c38c)",
> > >            "received_at": "2012-12-20 23:35:34.351518",
> > >            "age": "23.088664",
> > >            "duration": "0.009430",
> > >            "flag_point": "waiting for sub ops",
> > >            "client_info": { "client": "client.7636",
> > >                "tid": 101504},
> > >            "events": [
> > >                  { "time": "2012-12-20 23:35:34.351714",
> > >                    "event": "waiting_for_osdmap"},
> > >                  { "time": "2012-12-20 23:35:34.351811",
> > >                    "event": "reached_pg"},
> > >                  { "time": "2012-12-20 23:35:34.352030",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:35:34.352071",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:35:34.352146",
> > >                    "event": "sub_op_sent"},
> > >                  { "time": "2012-12-20 23:35:34.352213",
> > >                    "event": "commit_queued_for_journal_write"},
> > >                  { "time": "2012-12-20 23:35:34.352287",
> > >                    "event": "write_thread_in_journal_buffer"},
> > >                  { "time": "2012-12-20 23:35:34.355390",
> > >                    "event": "journaled_completion_queued"},
> > >                  { "time": "2012-12-20 23:35:34.355475",
> > >                    "event": "op_commit"},
> > >                  { "time": "2012-12-20 23:35:34.356661",
> > >                    "event": "sub_op_commit_rec"},
> > >                  { "time": "2012-12-20 23:35:34.360894",
> > >                    "event": "op_applied"},
> > >                  { "time": "2012-12-20 23:35:34.360948",
> > >                    "event": "done"}]},
> > >          { "description": "osd_sub_op_reply(client.7636.0:101504 6.38c 92d2c38c\/rb.0.122c.6b8b4567.00000000012c\/head\/\/6 [] ondisk, result = 0)",
> > >            "received_at": "2012-12-20 23:35:34.356286",
> > >            "age": "23.083896",
> > >            "duration": "0.000421",
> > >            "flag_point": "started",
> > >            "events": [
> > >                  { "time": "2012-12-20 23:35:34.356489",
> > >                    "event": "waiting_for_osdmap"},
> > >                  { "time": "2012-12-20 23:35:34.356598",
> > >                    "event": "reached_pg"},
> > >                  { "time": "2012-12-20 23:35:34.356640",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:35:34.356707",
> > >                    "event": "done"}]},
> > >          { "description": "osd_op(client.7636.0:101512 rb.0.122c.6b8b4567.000000000357 [write 3731456~4096] 6.42463fe3)",
> > >            "received_at": "2012-12-20 23:35:42.133103",
> > >            "age": "15.307079",
> > >            "duration": "0.008357",
> > >            "flag_point": "waiting for sub ops",
> > >            "client_info": { "client": "client.7636",
> > >                "tid": 101512},
> > >            "events": [
> > >                  { "time": "2012-12-20 23:35:42.133315",
> > >                    "event": "waiting_for_osdmap"},
> > >                  { "time": "2012-12-20 23:35:42.133427",
> > >                    "event": "reached_pg"},
> > >                  { "time": "2012-12-20 23:35:42.133684",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:35:42.133723",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:35:42.133796",
> > >                    "event": "sub_op_sent"},
> > >                  { "time": "2012-12-20 23:35:42.133908",
> > >                    "event": "commit_queued_for_journal_write"},
> > >                  { "time": "2012-12-20 23:35:42.133995",
> > >                    "event": "write_thread_in_journal_buffer"},
> > >                  { "time": "2012-12-20 23:35:42.136965",
> > >                    "event": "journaled_completion_queued"},
> > >                  { "time": "2012-12-20 23:35:42.137025",
> > >                    "event": "op_commit"},
> > >                  { "time": "2012-12-20 23:35:42.138456",
> > >                    "event": "sub_op_commit_rec"},
> > >                  { "time": "2012-12-20 23:35:42.141408",
> > >                    "event": "op_applied"},
> > >                  { "time": "2012-12-20 23:35:42.141460",
> > >                    "event": "done"}]},
> > >          { "description": "osd_sub_op_reply(client.7636.0:101512 6.1fe3 42463fe3\/rb.0.122c.6b8b4567.000000000357\/head\/\/6 [] ondisk, result = 0)",
> > >            "received_at": "2012-12-20 23:35:42.138087",
> > >            "age": "15.302095",
> > >            "duration": "0.000410",
> > >            "flag_point": "started",
> > >            "events": [
> > >                  { "time": "2012-12-20 23:35:42.138248",
> > >                    "event": "waiting_for_osdmap"},
> > >                  { "time": "2012-12-20 23:35:42.138363",
> > >                    "event": "reached_pg"},
> > >                  { "time": "2012-12-20 23:35:42.138443",
> > >                    "event": "started"},
> > >                  { "time": "2012-12-20 23:35:42.138497",
> > >                    "event": "done"}]}]}
> > >
> > >     # ceph --admin-daemon ./ceph-osd.24.asok config show { "name": 
> > > "osd.24",
> > >    "cluster": "ceph",
> > >    "none": "0\/5",
> > >    "lockdep": "0\/1",
> > >    "context": "0\/1",
> > >    "crush": "1\/1",
> > >    "mds": "1\/5",
> > >    "mds_balancer": "1\/5",
> > >    "mds_locker": "1\/5",
> > >    "mds_log": "1\/5",
> > >    "mds_log_expire": "1\/5",
> > >    "mds_migrator": "1\/5",
> > >    "buffer": "0\/1",
> > >    "timer": "0\/1",
> > >    "filer": "0\/1",
> > >    "striper": "0\/1",
> > >    "objecter": "0\/1",
> > >    "rados": "0\/5",
> > >    "rbd": "0\/5",
> > >    "journaler": "0\/5",
> > >    "objectcacher": "0\/5",
> > >    "client": "0\/5",
> > >    "osd": "0\/5",
> > >    "optracker": "0\/5",
> > >    "objclass": "0\/5",
> > >    "filestore": "1\/3",
> > >    "journal": "1\/3",
> > >    "ms": "0\/5",
> > >    "mon": "1\/5",
> > >    "monc": "0\/10",
> > >    "paxos": "0\/5",
> > >    "tp": "0\/5",
> > >    "auth": "1\/5",
> > >    "crypto": "1\/5",
> > >    "finisher": "1\/1",
> > >    "heartbeatmap": "1\/5",
> > >    "perfcounter": "1\/5",
> > >    "rgw": "1\/5",
> > >    "hadoop": "1\/5",
> > >    "javaclient": "1\/5",
> > >    "asok": "1\/5",
> > >    "throttle": "1\/1",
> > >    "host": "KVM04",
> > >    "fsid": "00000000-0000-0000-0000-000000000000",
> > >    "public_addr": ":\/0",
> > >    "cluster_addr": ":\/0",
> > >    "public_network": "",
> > >    "cluster_network": "",
> > >    "num_client": "1",
> > >    "monmap": "",
> > >    "mon_host": "",
> > >    "lockdep": "false",
> > >    "admin_socket": "\/var\/run\/ceph\/ceph-osd.24.asok",
> > >    "daemonize": "true",
> > >    "pid_file": "\/var\/run\/ceph\/osd.24.pid",
> > >    "chdir": "\/",
> > >    "max_open_files": "0",
> > >    "fatal_signal_handlers": "true",
> > >    "log_file": "\/var\/log\/ceph\/osd.24.log",
> > >    "log_max_new": "1000",
> > >    "log_max_recent": "100000",
> > >    "log_to_stderr": "false",
> > >    "err_to_stderr": "true",
> > >    "log_to_syslog": "false",
> > >    "err_to_syslog": "false",
> > >    "log_flush_on_exit": "true",
> > >    "clog_to_monitors": "true",
> > >    "clog_to_syslog": "false",
> > >    "mon_cluster_log_to_syslog": "false",
> > >    "mon_cluster_log_file": "\/var\/log\/ceph\/ceph.log",
> > >    "key": "",
> > >    "keyfile": "",
> > >    "keyring": "\/srv\/ceph\/osd\/osd.24\/keyring",
> > >    "heartbeat_interval": "5",
> > >    "heartbeat_file": "",
> > >    "perf": "true",
> > >    "ms_tcp_nodelay": "true",
> > >    "ms_initial_backoff": "0.2",
> > >    "ms_max_backoff": "15",
> > >    "ms_nocrc": "false",
> > >    "ms_die_on_bad_msg": "false",
> > >    "ms_dispatch_throttle_bytes": "104857600",
> > >    "ms_bind_ipv6": "false",
> > >    "ms_bind_port_min": "6800",
> > >    "ms_bind_port_max": "7100",
> > >    "ms_rwthread_stack_bytes": "1048576",
> > >    "ms_tcp_read_timeout": "900",
> > >    "ms_inject_socket_failures": "0",
> > >    "ms_inject_delay_type": "",
> > >    "ms_inject_delay_max": "1",
> > >    "ms_inject_delay_probability": "0",
> > >    "mon_data": "\/var\/lib\/ceph\/mon\/ceph-24",
> > >    "mon_initial_members": "",
> > >    "mon_sync_fs_threshold": "5",
> > >    "mon_tick_interval": "5",
> > >    "mon_subscribe_interval": "300",
> > >    "mon_osd_laggy_halflife": "3600",
> > >    "mon_osd_laggy_weight": "0.3",
> > >    "mon_osd_adjust_heartbeat_grace": "true",
> > >    "mon_osd_adjust_down_out_interval": "true",
> > >    "mon_osd_auto_mark_in": "false",
> > >    "mon_osd_auto_mark_auto_out_in": "true",
> > >    "mon_osd_auto_mark_new_in": "true",
> > >    "mon_osd_down_out_interval": "300",
> > >    "mon_osd_min_up_ratio": "0.3",
> > >    "mon_osd_min_in_ratio": "0.3",
> > >    "mon_lease": "5",
> > >    "mon_lease_renew_interval": "3",
> > >    "mon_lease_ack_timeout": "10",
> > >    "mon_clock_drift_allowed": "0.05",
> > >    "mon_clock_drift_warn_backoff": "5",
> > >    "mon_accept_timeout": "10",
> > >    "mon_pg_create_interval": "30",
> > >    "mon_pg_stuck_threshold": "300",
> > >    "mon_osd_full_ratio": "0.95",
> > >    "mon_osd_nearfull_ratio": "0.85",
> > >    "mon_globalid_prealloc": "100",
> > >    "mon_osd_report_timeout": "900",
> > >    "mon_force_standby_active": "true",
> > >    "mon_min_osdmap_epochs": "500",
> > >    "mon_max_pgmap_epochs": "500",
> > >    "mon_max_log_epochs": "500",
> > >    "mon_max_osd": "10000",
> > >    "mon_probe_timeout": "2",
> > >    "mon_slurp_timeout": "10",
> > >    "mon_slurp_bytes": "262144",
> > >    "mon_client_bytes": "104857600",
> > >    "mon_daemon_bytes": "419430400",
> > >    "mon_max_log_entries_per_event": "4096",
> > >    "paxos_max_join_drift": "10",
> > >    "paxos_propose_interval": "1",
> > >    "paxos_min_wait": "0.05",
> > >    "clock_offset": "0",
> > >    "auth_cluster_required": "none",
> > >    "auth_service_required": "none",
> > >    "auth_client_required": "none",
> > >    "auth_supported": "none",
> > >    "cephx_require_signatures": "false",
> > >    "cephx_sign_messages": "true",
> > >    "auth_mon_ticket_ttl": "43200",
> > >    "auth_service_ticket_ttl": "3600",
> > >    "mon_client_hunt_interval": "3",
> > >    "mon_client_ping_interval": "10",
> > >    "mon_client_max_log_entries_per_message": "1000",
> > >    "mon_max_pool_pg_num": "65536",
> > >    "client_cache_size": "16384",
> > >    "client_cache_mid": "0.75",
> > >    "client_use_random_mds": "false",
> > >    "client_mount_timeout": "30",
> > >    "client_tick_interval": "1",
> > >    "client_trace": "",
> > >    "client_readahead_min": "131072",
> > >    "client_readahead_max_bytes": "0",
> > >    "client_readahead_max_periods": "4",
> > >    "client_snapdir": ".snap",
> > >    "client_mountpoint": "\/",
> > >    "client_notify_timeout": "10",
> > >    "client_caps_release_delay": "5",
> > >    "client_oc": "true",
> > >    "client_oc_size": "209715200",
> > >    "client_oc_max_dirty": "104857600",
> > >    "client_oc_target_dirty": "8388608",
> > >    "client_oc_max_dirty_age": "5",
> > >    "client_oc_max_objects": "1000",
> > >    "client_debug_force_sync_read": "false",
> > >    "client_debug_inject_tick_delay": "0",
> > >    "fuse_use_invalidate_cb": "false",
> > >    "fuse_big_writes": "true",
> > >    "fuse_debug": "false",
> > >    "objecter_tick_interval": "5",
> > >    "objecter_timeout": "10",
> > >    "objecter_inflight_op_bytes": "104857600",
> > >    "objecter_inflight_ops": "1024",
> > >    "journaler_allow_split_entries": "true",
> > >    "journaler_write_head_interval": "15",
> > >    "journaler_prefetch_periods": "10",
> > >    "journaler_prezero_periods": "5",
> > >    "journaler_batch_interval": "0.001",
> > >    "journaler_batch_max": "0",
> > >    "mds_data": "\/var\/lib\/ceph\/mds\/ceph-24",
> > >    "mds_max_file_size": "1099511627776",
> > >    "mds_cache_size": "100000",
> > >    "mds_cache_mid": "0.7",
> > >    "mds_mem_max": "1048576",
> > >    "mds_dir_commit_ratio": "0.5",
> > >    "mds_dir_max_commit_size": "90",
> > >    "mds_decay_halflife": "5",
> > >    "mds_beacon_interval": "4",
> > >    "mds_beacon_grace": "15",
> > >    "mds_blacklist_interval": "1440",
> > >    "mds_session_timeout": "60",
> > >    "mds_session_autoclose": "300",
> > >    "mds_reconnect_timeout": "45",
> > >    "mds_tick_interval": "5",
> > >    "mds_dirstat_min_interval": "1",
> > >    "mds_scatter_nudge_interval": "5",
> > >    "mds_client_prealloc_inos": "1000",
> > >    "mds_early_reply": "true",
> > >    "mds_use_tmap": "true",
> > >    "mds_default_dir_hash": "2",
> > >    "mds_log": "true",
> > >    "mds_log_skip_corrupt_events": "false",
> > >    "mds_log_max_events": "-1",
> > >    "mds_log_max_segments": "30",
> > >    "mds_log_max_expiring": "20",
> > >    "mds_bal_sample_interval": "3",
> > >    "mds_bal_replicate_threshold": "8000",
> > >    "mds_bal_unreplicate_threshold": "0",
> > >    "mds_bal_frag": "false",
> > >    "mds_bal_split_size": "10000",
> > >    "mds_bal_split_rd": "25000",
> > >    "mds_bal_split_wr": "10000",
> > >    "mds_bal_split_bits": "3",
> > >    "mds_bal_merge_size": "50",
> > >    "mds_bal_merge_rd": "1000",
> > >    "mds_bal_merge_wr": "1000",
> > >    "mds_bal_interval": "10",
> > >    "mds_bal_fragment_interval": "5",
> > >    "mds_bal_idle_threshold": "0",
> > >    "mds_bal_max": "-1",
> > >    "mds_bal_max_until": "-1",
> > >    "mds_bal_mode": "0",
> > >    "mds_bal_min_rebalance": "0.1",
> > >    "mds_bal_min_start": "0.2",
> > >    "mds_bal_need_min": "0.8",
> > >    "mds_bal_need_max": "1.2",
> > >    "mds_bal_midchunk": "0.3",
> > >    "mds_bal_minchunk": "0.001",
> > >    "mds_bal_target_removal_min": "5",
> > >    "mds_bal_target_removal_max": "10",
> > >    "mds_replay_interval": "1",
> > >    "mds_shutdown_check": "0",
> > >    "mds_thrash_exports": "0",
> > >    "mds_thrash_fragments": "0",
> > >    "mds_dump_cache_on_map": "false",
> > >    "mds_dump_cache_after_rejoin": "false",
> > >    "mds_verify_scatter": "false",
> > >    "mds_debug_scatterstat": "false",
> > >    "mds_debug_frag": "false",
> > >    "mds_debug_auth_pins": "false",
> > >    "mds_debug_subtrees": "false",
> > >    "mds_kill_mdstable_at": "0",
> > >    "mds_kill_export_at": "0",
> > >    "mds_kill_import_at": "0",
> > >    "mds_kill_link_at": "0",
> > >    "mds_kill_rename_at": "0",
> > >    "mds_wipe_sessions": "false",
> > >    "mds_wipe_ino_prealloc": "false",
> > >    "mds_skip_ino": "0",
> > >    "max_mds": "1",
> > >    "mds_standby_for_name": "",
> > >    "mds_standby_for_rank": "-1",
> > >    "mds_standby_replay": "false",
> > >    "osd_auto_upgrade_tmap": "true",
> > >    "osd_tmapput_sets_uses_tmap": "false",
> > >    "osd_max_backfills": "10",
> > >    "osd_backfill_full_ratio": "0.85",
> > >    "osd_backfill_retry_interval": "10",
> > >    "osd_uuid": "00000000-0000-0000-0000-000000000000",
> > >    "osd_data": "\/srv\/ceph\/osd\/osd.24",
> > >    "osd_journal": "\/dev\/sda3",
> > >    "osd_journal_size": "5120",
> > >    "osd_max_write_size": "90",
> > >    "osd_max_pgls": "1024",
> > >    "osd_client_message_size_cap": "524288000",
> > >    "osd_pg_bits": "6",
> > >    "osd_pgp_bits": "6",
> > >    "osd_min_rep": "1",
> > >    "osd_max_rep": "10",
> > >    "osd_pool_default_crush_rule": "0",
> > >    "osd_pool_default_size": "2",
> > >    "osd_pool_default_min_size": "0",
> > >    "osd_pool_default_pg_num": "8",
> > >    "osd_pool_default_pgp_num": "8",
> > >    "osd_map_dedup": "true",
> > >    "osd_map_cache_size": "500",
> > >    "osd_map_message_max": "100",
> > >    "osd_op_threads": "2",
> > >    "osd_disk_threads": "1",
> > >    "osd_recovery_threads": "1",
> > >    "osd_recover_clone_overlap": "true",
> > >    "osd_backfill_scan_min": "64",
> > >    "osd_backfill_scan_max": "512",
> > >    "osd_op_thread_timeout": "30",
> > >    "osd_recovery_thread_timeout": "30",
> > >    "osd_snap_trim_thread_timeout": "3600",
> > >    "osd_scrub_thread_timeout": "60",
> > >    "osd_scrub_finalize_thread_timeout": "600",
> > >    "osd_remove_thread_timeout": "3600",
> > >    "osd_command_thread_timeout": "600",
> > >    "osd_age": "0.8",
> > >    "osd_age_time": "0",
> > >    "osd_heartbeat_addr": ":\/0",
> > >    "osd_heartbeat_interval": "6",
> > >    "osd_heartbeat_grace": "20",
> > >    "osd_mon_heartbeat_interval": "30",
> > >    "osd_mon_report_interval_max": "120",
> > >    "osd_mon_report_interval_min": "5",
> > >    "osd_mon_ack_timeout": "30",
> > >    "osd_min_down_reporters": "1",
> > >    "osd_min_down_reports": "3",
> > >    "osd_default_data_pool_replay_window": "45",
> > >    "osd_preserve_trimmed_log": "false",
> > >    "osd_auto_mark_unfound_lost": "false",
> > >    "osd_recovery_delay_start": "0",
> > >    "osd_recovery_max_active": "50",
> > >    "osd_recovery_max_chunk": "8388608",
> > >    "osd_recovery_forget_lost_objects": "false",
> > >    "osd_max_scrubs": "1",
> > >    "osd_scrub_load_threshold": "0.5",
> > >    "osd_scrub_min_interval": "300",
> > >    "osd_scrub_max_interval": "86400",
> > >    "osd_deep_scrub_interval": "604800",
> > >    "osd_deep_scrub_stride": "524288",
> > >    "osd_auto_weight": "false",
> > >    "osd_class_dir": "\/usr\/local\/lib\/rados-classes",
> > >    "osd_check_for_log_corruption": "false",
> > >    "osd_use_stale_snap": "false",
> > >    "osd_rollback_to_cluster_snap": "",
> > >    "osd_default_notify_timeout": "30",
> > >    "osd_kill_backfill_at": "0",
> > >    "osd_min_pg_log_entries": "1000",
> > >    "osd_op_complaint_time": "30",
> > >    "osd_command_max_records": "256",
> > >    "osd_op_log_threshold": "5",
> > >    "osd_verify_sparse_read_holes": "false",
> > >    "osd_debug_drop_ping_probability": "0",
> > >    "osd_debug_drop_ping_duration": "0",
> > >    "osd_debug_drop_pg_create_probability": "0",
> > >    "osd_debug_drop_pg_create_duration": "1",
> > >    "osd_debug_drop_op_probability": "0",
> > >    "osd_op_history_size": "20",
> > >    "osd_op_history_duration": "600",
> > >    "osd_target_transaction_size": "300",
> > >    "osd_client_op_priority": "63",
> > >    "osd_recovery_op_priority": "10",
> > >    "filestore": "false",
> > >    "filestore_index_retry_probability": "0",
> > >    "filestore_debug_omap_check": "false",
> > >    "filestore_xattr_use_omap": "false",
> > >    "filestore_max_inline_xattr_size": "512",
> > >    "filestore_max_inline_xattrs": "2",
> > >    "filestore_max_sync_interval": "5",
> > >    "filestore_min_sync_interval": "0.01",
> > >    "filestore_btrfs_snap": "true",
> > >    "filestore_btrfs_clone_range": "true",
> > >    "filestore_fsync_flushes_journal_data": "false",
> > >    "filestore_fiemap": "false",
> > >    "filestore_flusher": "true",
> > >    "filestore_flusher_max_fds": "512",
> > >    "filestore_flush_min": "65536",
> > >    "filestore_sync_flush": "false",
> > >    "filestore_journal_parallel": "false",
> > >    "filestore_journal_writeahead": "false",
> > >    "filestore_journal_trailing": "false",
> > >    "filestore_queue_max_ops": "500",
> > >    "filestore_queue_max_bytes": "104857600",
> > >    "filestore_queue_committing_max_ops": "500",
> > >    "filestore_queue_committing_max_bytes": "104857600",
> > >    "filestore_op_threads": "2",
> > >    "filestore_op_thread_timeout": "60",
> > >    "filestore_op_thread_suicide_timeout": "180",
> > >    "filestore_commit_timeout": "600",
> > >    "filestore_fiemap_threshold": "4096",
> > >    "filestore_merge_threshold": "10",
> > >    "filestore_split_multiple": "2",
> > >    "filestore_update_to": "1000",
> > >    "filestore_blackhole": "false",
> > >    "filestore_dump_file": "",
> > >    "filestore_kill_at": "0",
> > >    "filestore_fail_eio": "true",
> > >    "journal_dio": "true",
> > >    "journal_aio": "false",
> > >    "journal_block_align": "true",
> > >    "journal_max_write_bytes": "10485760",
> > >    "journal_max_write_entries": "100",
> > >    "journal_queue_max_ops": "500",
> > >    "journal_queue_max_bytes": "104857600",
> > >    "journal_align_min_size": "65536",
> > >    "journal_replay_from": "0",
> > >    "journal_zero_on_create": "false",
> > >    "rbd_cache": "false",
> > >    "rbd_cache_size": "33554432",
> > >    "rbd_cache_max_dirty": "25165824",
> > >    "rbd_cache_target_dirty": "16777216",
> > >    "rbd_cache_max_dirty_age": "1",
> > >    "nss_db_path": "",
> > >    "rgw_data": "\/var\/lib\/ceph\/radosgw\/ceph-24",
> > >    "rgw_enable_apis": "s3, swift, swift_auth, admin",
> > >    "rgw_cache_enabled": "true",
> > >    "rgw_cache_lru_size": "10000",
> > >    "rgw_socket_path": "",
> > >    "rgw_dns_name": "",
> > >    "rgw_swift_url": "",
> > >    "rgw_swift_url_prefix": "swift",
> > >    "rgw_swift_auth_url": "",
> > >    "rgw_swift_auth_entry": "auth",
> > >    "rgw_keystone_url": "",
> > >    "rgw_keystone_admin_token": "",
> > >    "rgw_keystone_accepted_roles": "Member, admin",
> > >    "rgw_keystone_token_cache_size": "10000",
> > >    "rgw_keystone_revocation_interval": "900",
> > >    "rgw_admin_entry": "admin",
> > >    "rgw_enforce_swift_acls": "true",
> > >    "rgw_swift_token_expiration": "86400",
> > >    "rgw_print_continue": "true",
> > >    "rgw_remote_addr_param": "REMOTE_ADDR",
> > >    "rgw_op_thread_timeout": "600",
> > >    "rgw_op_thread_suicide_timeout": "0",
> > >    "rgw_thread_pool_size": "100",
> > >    "rgw_num_control_oids": "8",
> > >    "rgw_cluster_root_pool": ".rgw.root",
> > >    "rgw_log_nonexistent_bucket": "false",
> > >    "rgw_log_object_name": "%Y-%m-%d-%H-%i-%n",
> > >    "rgw_log_object_name_utc": "false",
> > >    "rgw_usage_max_shards": "32",
> > >    "rgw_usage_max_user_shards": "1",
> > >    "rgw_enable_ops_log": "true",
> > >    "rgw_enable_usage_log": "true",
> > >    "rgw_ops_log_rados": "true",
> > >    "rgw_ops_log_socket_path": "",
> > >    "rgw_ops_log_data_backlog": "5242880",
> > >    "rgw_usage_log_flush_threshold": "1024",
> > >    "rgw_usage_log_tick_interval": "30",
> > >    "rgw_intent_log_object_name": "%Y-%m-%d-%i-%n",
> > >    "rgw_intent_log_object_name_utc": "false",
> > >    "rgw_init_timeout": "30",
> > >    "rgw_mime_types_file": "\/etc\/mime.types",
> > >    "rgw_gc_max_objs": "32",
> > >    "rgw_gc_obj_min_wait": "7200",
> > >    "rgw_gc_processor_max_time": "3600",
> > >    "rgw_gc_processor_period": "3600",
> > >    "rgw_s3_success_create_obj_status": "0",
> > >    "rgw_resolve_cname": "false",
> > >    "rgw_obj_stripe_size": "4194304",
> > >    "rgw_extended_http_attrs": "",
> > >    "mutex_perf_counter": "false",
> > >    "internal_safe_to_start_threads": "true"}
> > >
> > >
> > > -----Original Message-----
> > > From: Mark Nelson [mailto:mark.nelson@xxxxxxxxxxx]
> > > Sent: Thursday, 20 December 2012 11:28 PM
> > > To: Matthew Anderson
> > > Cc: ceph-devel@xxxxxxxxxxxxxxx
> > > Subject: Re: OSD's slow down to a crawl
> > >
> > > Hi Matt,
> > >
> > > Yeah, your log is looking pretty sparse!  I imagine Sam will have a lot of questions for you.  Out of curiosity have you looked at any io/cpu/memory stats when things slow down?  sysprof may come in handy if it looks like it's CPU related.  Also, check out the OSD admin socket.
> > > Sebastien Han made a nice little blog entry describing it:
> > >
> > > http://www.sebastien-han.fr/blog/2012/08/14/ceph-admin-socket/
> > >
> > > You can get a lot of information about the current state of things.
> > >
> > > Mark
> > >
> > 
> > --
> > 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
> > 
> > 
> 

Attachment: freeze.log
Description: freeze.log


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