Huge issues with slow requests

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Only time I saw such behaviour was when I was deleting a big chunk of data
from the cluster: all the client activity was reduced, the op/s were almost
non-existent and there was unjustified delays all over the cluster. But all
the disks were somewhat busy in atop/iotstat.


On 5 September 2014 09:51, David <david at visions.se> wrote:

> Hi,
>
> Indeed strange.
>
> That output was when we had issues, seems that most operations were
> blocked / slow requests.
>
> A ?baseline? output is more like today:
>
> 2014-09-05 10:44:29.123681 mon.0 [INF] pgmap v12582759: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 9273KB/s
> rd, 24650KB/s wr, 2755op/s
> 2014-09-05 10:44:30.125637 mon.0 [INF] pgmap v12582760: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 9500KB/s
> rd, 20430KB/s wr, 2294op/s
> 2014-09-05 10:44:31.139427 mon.0 [INF] pgmap v12582761: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 9216KB/s
> rd, 20062KB/s wr, 2488op/s
> 2014-09-05 10:44:32.144945 mon.0 [INF] pgmap v12582762: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 12511KB/s rd, 15739KB/s wr, 2488op/s
> 2014-09-05 10:44:33.161210 mon.0 [INF] pgmap v12582763: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 18593KB/s rd, 14880KB/s wr, 2609op/s
> 2014-09-05 10:44:34.187294 mon.0 [INF] pgmap v12582764: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 17720KB/s rd, 22964KB/s wr, 3257op/s
> 2014-09-05 10:44:35.190785 mon.0 [INF] pgmap v12582765: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 19230KB/s rd, 18901KB/s wr, 3199op/s
> 2014-09-05 10:44:36.213535 mon.0 [INF] pgmap v12582766: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 17630KB/s rd, 18855KB/s wr, 3131op/s
> 2014-09-05 10:44:37.220052 mon.0 [INF] pgmap v12582767: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 12262KB/s rd, 18627KB/s wr, 2595op/s
> 2014-09-05 10:44:38.233357 mon.0 [INF] pgmap v12582768: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 17697KB/s rd, 17572KB/s wr, 2156op/s
> 2014-09-05 10:44:39.239409 mon.0 [INF] pgmap v12582769: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 20300KB/s rd, 19735KB/s wr, 2197op/s
> 2014-09-05 10:44:40.260423 mon.0 [INF] pgmap v12582770: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 14656KB/s rd, 15460KB/s wr, 2199op/s
> 2014-09-05 10:44:41.269736 mon.0 [INF] pgmap v12582771: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 8969KB/s
> rd, 11918KB/s wr, 1951op/s
> 2014-09-05 10:44:42.276192 mon.0 [INF] pgmap v12582772: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 7272KB/s
> rd, 10644KB/s wr, 1832op/s
> 2014-09-05 10:44:43.291817 mon.0 [INF] pgmap v12582773: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 9316KB/s
> rd, 16610KB/s wr, 2412op/s
> 2014-09-05 10:44:44.295469 mon.0 [INF] pgmap v12582774: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 9257KB/s
> rd, 19953KB/s wr, 2633op/s
> 2014-09-05 10:44:45.315774 mon.0 [INF] pgmap v12582775: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 9718KB/s
> rd, 14298KB/s wr, 2101op/s
> 2014-09-05 10:44:46.326783 mon.0 [INF] pgmap v12582776: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 20877KB/s rd, 12822KB/s wr, 2447op/s
> 2014-09-05 10:44:47.327537 mon.0 [INF] pgmap v12582777: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 18447KB/s rd, 12945KB/s wr, 2226op/s
> 2014-09-05 10:44:48.348725 mon.0 [INF] pgmap v12582778: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 15514KB/s rd, 19366KB/s wr, 1892op/s
> 2014-09-05 10:44:49.357537 mon.0 [INF] pgmap v12582779: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 16640KB/s rd, 19694KB/s wr, 1887op/s
> 2014-09-05 10:44:50.365016 mon.0 [INF] pgmap v12582780: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 9139KB/s
> rd, 10734KB/s wr, 1566op/s
> 2014-09-05 10:44:51.385553 mon.0 [INF] pgmap v12582781: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 11493KB/s rd, 13827KB/s wr, 1928op/s
> 2014-09-05 10:44:52.389189 mon.0 [INF] pgmap v12582782: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 12922KB/s rd, 12814KB/s wr, 1670op/s
> 2014-09-05 10:44:53.403735 mon.0 [INF] pgmap v12582783: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 14880KB/s rd, 17532KB/s wr, 2145op/s
> 2014-09-05 10:44:54.410581 mon.0 [INF] pgmap v12582784: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 15419KB/s rd, 19696KB/s wr, 2259op/s
> 2014-09-05 10:44:55.420308 mon.0 [INF] pgmap v12582785: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 10964KB/s rd, 15739KB/s wr, 1701op/s
> 2014-09-05 10:44:56.445017 mon.0 [INF] pgmap v12582786: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 16195KB/s rd, 15554KB/s wr, 2444op/s
> 2014-09-05 10:44:57.452136 mon.0 [INF] pgmap v12582787: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 15016KB/s rd, 16356KB/s wr, 2358op/s
> 2014-09-05 10:44:58.465958 mon.0 [INF] pgmap v12582788: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 11668KB/s rd, 18443KB/s wr, 2029op/s
> 2014-09-05 10:44:59.483462 mon.0 [INF] pgmap v12582789: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 12253KB/s rd, 10846KB/s wr, 1529op/s
> 2014-09-05 10:45:00.492322 mon.0 [INF] pgmap v12582790: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 12247KB/s rd, 7084KB/s wr, 1464op/s
> 2014-09-05 10:45:01.516581 mon.0 [INF] pgmap v12582791: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 16460KB/s rd, 12089KB/s wr, 2537op/s
> 2014-09-05 10:45:02.527110 mon.0 [INF] pgmap v12582792: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 13382KB/s rd, 15080KB/s wr, 2563op/s
> 2014-09-05 10:45:03.538090 mon.0 [INF] pgmap v12582793: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 10902KB/s rd, 18745KB/s wr, 2863op/s
> 2014-09-05 10:45:04.558261 mon.0 [INF] pgmap v12582794: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 10850KB/s rd, 15995KB/s wr, 2695op/s
> 2014-09-05 10:45:05.565750 mon.0 [INF] pgmap v12582795: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail; 9636KB/s
> rd, 13262KB/s wr, 2372op/s
> 2014-09-05 10:45:06.593984 mon.0 [INF] pgmap v12582796: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 18808KB/s rd, 19329KB/s wr, 3819op/s
> 2014-09-05 10:45:07.595866 mon.0 [INF] pgmap v12582797: 6860 pgs: 6860
> active+clean; 12253 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 21265KB/s rd, 20743KB/s wr, 3861op/s
> 2014-09-05 10:45:08.624949 mon.0 [INF] pgmap v12582798: 6860 pgs: 6860
> active+clean; 12254 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 20114KB/s rd, 18543KB/s wr, 3248op/s
> 2014-09-05 10:45:09.627901 mon.0 [INF] pgmap v12582799: 6860 pgs: 6860
> active+clean; 12254 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 14717KB/s rd, 15141KB/s wr, 2302op/s
> 2014-09-05 10:45:10.643234 mon.0 [INF] pgmap v12582800: 6860 pgs: 6860
> active+clean; 12254 GB data, 36574 GB used, 142 TB / 178 TB avail; 8328KB/s
> rd, 13950KB/s wr, 1919op/s
> 2014-09-05 10:45:11.651602 mon.0 [INF] pgmap v12582801: 6860 pgs: 6860
> active+clean; 12254 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 16978KB/s rd, 15921KB/s wr, 3377op/s
> 2014-09-05 10:45:12.674819 mon.0 [INF] pgmap v12582802: 6860 pgs: 6860
> active+clean; 12254 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 16471KB/s rd, 14034KB/s wr, 3379op/s
> 2014-09-05 10:45:13.688080 mon.0 [INF] pgmap v12582803: 6860 pgs: 6860
> active+clean; 12254 GB data, 36574 GB used, 142 TB / 178 TB avail;
> 16149KB/s rd, 12657KB/s wr, 2734op/s
>
> Aye, we actually saw latency on the disks go up a bit when we had 128GB of
> RAM on the OSDs and decided to beef them up to 256GB which helped.
> They?re running different workloads (shared hosting) but we?ve never
> encountered the issue we had yesterday even during our testing/benchmarking.
>
> Kind Regards,
> David
>
> 5 sep 2014 kl. 09:05 skrev Christian Balzer <chibi at gol.com>:
>
> >
> > Hello,
> >
> > On Fri, 5 Sep 2014 08:26:47 +0200 David wrote:
> >
> >> Hi,
> >>
> >> Sorry for the lack of information yesterday, this was "solved" after
> >> some 30 minutes, after having reloaded/restarted all osd daemons.
> >> Unfortunately we couldn?t pin point it to a single OSD or drive, all
> >> drives seemed ok, some had a bit higher latency and we tried to out / in
> >> them to see if it had any effect which it did not.
> >>
> > This is odd.
> > Having it "fixed" by restarting all OSDs would suggest either a software
> > problem (bug) with Ceph or some resource other than the storage system
> > being starved. But memory seems unlikely, even with bloated, leaking OSD
> > daemon. And CPU seems even less likely.
> >
> >> The cluster consists of 3 mon servrers, 5 OSD servers with 10 enterprise
> >> HDDs backed with 2 S3700 SSDs for journals each. OSD servers have 256GB
> >> of RAM, 2x E5-2630 v2 @ 2.60GHz CPUs.
> >>
> >> The log that I posted yesterday was just a small taste of the full
> >> one ;) They were all pointing to different osd?s that they were waiting
> >> for. We?re also monitoring all of the VMs running on KVM, and we didn?t
> >> see any exceptional throughput or iops usage before or during this
> >> event. We were checking iostat etc and nothing was out of the ordinary..
> >>
> >> Going to double check SMART and also see if we can off load some of the
> >> cluster in any way. If you have any other advice that?d be appreciated
> :)
> >>
> > If the mon output below is typical for your cluster (634KB/s rd, 487KB/s
> > wr, 90op/s) it should be able to handle that w/o breaking a sweat.
> > I guestimate it at about 13K write IOPS and your reads should (after a
> > while) come mostly from the nice big pagecache you have on those 256GB
> RAM
> > machines.
> >
> > Christian
> >
> >> Thanks for your help!
> >>
> >> Kind Regards,
> >> David
> >>
> >> 5 sep 2014 kl. 07:30 skrev Martin B Nielsen <martin at unity3d.com>:
> >>
> >>> Just echoing what Christian said.
> >>>
> >>> Also, iirc the "currently waiting for subobs on [" could also mean a
> >>> problem on those as it waits for ack from them (I might remember
> >>> wrong).
> >>>
> >>> If that is the case you might want to check in on osd 13 & 37 as well.
> >>>
> >>> With the cluster load and size you should not have this problem; I'm
> >>> pretty sure you're dealing with a rogue/faulty osd/node somewhere.
> >>>
> >>> Cheers,
> >>> Martin
> >>>
> >>>
> >>> On Fri, Sep 5, 2014 at 2:28 AM, Christian Balzer <chibi at gol.com>
> wrote:
> >>> On Thu, 4 Sep 2014 12:02:13 +0200 David wrote:
> >>>
> >>>> Hi,
> >>>>
> >>>> We?re running a ceph cluster with version:
> >>>>
> >>>> 0.67.7-1~bpo70+1
> >>>>
> >>>> All of a sudden we?re having issues with the cluster (running RBD
> >>>> images for kvm) with slow requests on all of the OSD servers. Any
> >>>> idea why and how to fix it?
> >>>>
> >>> You give us a Ceph version at least, but for anybody to make guesses we
> >>> need much more information than a log spew.
> >>>
> >>> How many nodes/OSDs, OS, hardware, OSD details (FS, journals on SSDs),
> >>> etc.
> >>>
> >>> Run atop (in a sufficiently large terminal) on all your nodes, see if
> >>> you can spot a bottleneck, like a disk being at 100% all the time with
> >>> a much higher avio than the others.
> >>> Looking at your logs, I'd pay particular attention to the disk holding
> >>> osd.22.
> >>> A single slow disk can bring a whole large cluster to a crawl.
> >>> If you're using a hardware controller with a battery backed up cache,
> >>> check if that is fine, loss of the battery would switch from writeback
> >>> to writethrough and massively slow down IOPS.
> >>>
> >>> Regards,
> >>>
> >>> Christian
> >>>>
> >>>> 2014-09-04 11:56:35.868521 mon.0 [INF] pgmap v12504451: 6860 pgs:
> >>>> 6860 active+clean; 12163 GB data, 36308 GB used, 142 TB / 178 TB
> >>>> avail; 634KB/s rd, 487KB/s wr, 90op/s 2014-09-04 11:56:29.510270
> >>>> osd.22 [WRN] 15 slow requests, 1 included below; oldest blocked for
> >>>>> 44.745754 secs 2014-09-04 11:56:29.510276 osd.22 [WRN] slow
> >>>>> request 30.999821 seconds
> >>>> old, received at 2014-09-04 11:55:58.510424:
> >>>> osd_op(client.10731617.0:81868956
> >>>> rbd_data.967e022eb141f2.0000000000000e72 [write 0~4194304] 3.c585cebe
> >>>> e13901) v4 currently waiting for subops from [37,13] 2014-09-04
> >>>> 11:56:30.510528 osd.22 [WRN] 21 slow requests, 6 included below;
> >>>> oldest blocked for > 45.745989 secs 2014-09-04 11:56:30.510534
> >>>> osd.22 [WRN] slow request 30.122555 seconds old, received at
> >>>> 2014-09-04 11:56:00.387925: osd_op(client.13425082.0:11962345
> >>>> rbd_data.54f24c3d1b58ba.0000000000003753 [stat,write 1114112~8192]
> >>>> 3.c9e49140 e13901) v4 currently waiting for subops from [13,42]
> >>>> 2014-09-04 11:56:30.510537 osd.22 [WRN] slow request 30.122362
> >>>> seconds old, received at 2014-09-04 11:56:00.388118:
> >>>> osd_op(client.13425082.0:11962352
> >>>> rbd_data.54f24c3d1b58ba.0000000000003753 [stat,write 1134592~4096]
> >>>> 3.c9e49140 e13901) v4 currently waiting for subops from [13,42]
> >>>> 2014-09-04 11:56:30.510541 osd.22 [WRN] slow request 30.122298
> >>>> seconds old, received at 2014-09-04 11:56:00.388182:
> >>>> osd_op(client.13425082.0:11962353
> >>>> rbd_data.54f24c3d1b58ba.0000000000003753 [stat,write 4046848~8192]
> >>>> 3.c9e49140 e13901) v4 currently waiting for subops from [13,42]
> >>>> 2014-09-04 11:56:30.510544 osd.22 [WRN] slow request 30.121577
> >>>> seconds old, received at 2014-09-04 11:56:00.388903:
> >>>> osd_op(client.13425082.0:11962374
> >>>> rbd_data.54f24c3d1b58ba.00000000000047f2 [stat,write 2527232~4096]
> >>>> 3.cd9a9015 e13901) v4 currently waiting for subops from [45,1]
> >>>> 2014-09-04 11:56:30.510548 osd.22 [WRN] slow request 30.121518
> >>>> seconds old, received at 2014-09-04 11:56:00.388962:
> >>>> osd_op(client.13425082.0:11962375
> >>>> rbd_data.54f24c3d1b58ba.00000000000047f2 [stat,write 3133440~4096]
> >>>> 3.cd9a9015 e13901) v4 currently waiting for subops from [45,1]
> >>>> 2014-09-04 11:56:31.510706 osd.22 [WRN] 26 slow requests, 6 included
> >>>> below; oldest blocked for > 46.746163 secs 2014-09-04 11:56:31.510711
> >>>> osd.22 [WRN] slow request 31.035418 seconds old, received at
> >>>> 2014-09-04 11:56:00.475236: osd_op(client.9266625.0:135900595
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2097152~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:31.510715 osd.22 [WRN] slow request 31.035335
> >>>> seconds old, received at 2014-09-04 11:56:00.475319:
> >>>> osd_op(client.9266625.0:135900596
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2162688~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:31.510718 osd.22 [WRN] slow request 31.035270
> >>>> seconds old, received at 2014-09-04 11:56:00.475384:
> >>>> osd_op(client.9266625.0:135900597
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2400256~16384]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:31.510721 osd.22 [WRN] slow request 31.035093
> >>>> seconds old, received at 2014-09-04 11:56:00.475561:
> >>>> osd_op(client.9266625.0:135900598
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2420736~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:31.510724 osd.22 [WRN] slow request 31.034990
> >>>> seconds old, received at 2014-09-04 11:56:00.475664:
> >>>> osd_op(client.9266625.0:135900599
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2428928~12288]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:32.510864 osd.22 [WRN] 28 slow requests, 6 included
> >>>> below; oldest blocked for > 47.746324 secs 2014-09-04 11:56:32.510871
> >>>> osd.22 [WRN] slow request 32.035026 seconds old, received at
> >>>> 2014-09-04 11:56:00.475789: osd_op(client.9266625.0:135900600
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2453504~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:32.510876 osd.22 [WRN] slow request 32.034982
> >>>> seconds old, received at 2014-09-04 11:56:00.475833:
> >>>> osd_op(client.9266625.0:135900601
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2502656~16384]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:32.510881 osd.22 [WRN] slow request 32.034917
> >>>> seconds old, received at 2014-09-04 11:56:00.475898:
> >>>> osd_op(client.9266625.0:135900602
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2600960~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:32.510885 osd.22 [WRN] slow request 32.034807
> >>>> seconds old, received at 2014-09-04 11:56:00.476008:
> >>>> osd_op(client.9266625.0:135900603
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2617344~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:32.510890 osd.22 [WRN] slow request 32.034756
> >>>> seconds old, received at 2014-09-04 11:56:00.476059:
> >>>> osd_op(client.9266625.0:135900604
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2637824~69632]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:32.723329 osd.17 [WRN] 4 slow requests, 4 included
> >>>> below; oldest blocked for > 30.605794 secs 2014-09-04 11:56:32.723335
> >>>> osd.17 [WRN] slow request 30.605794 seconds old, received at
> >>>> 2014-09-04 11:56:02.117495: osd_op(client.12646411.0:31118135
> >>>> rbd_data.81aaf52eb141f2.0000000000000e4b [stat,write 0~4194304]
> >>>> 3.716b373b e13901) v4 currently waiting for subops from [31,1]
> >>>> 2014-09-04 11:56:32.723338 osd.17 [WRN] slow request 30.362042
> >>>> seconds old, received at 2014-09-04 11:56:02.361247:
> >>>> osd_op(client.12485793.0:121786489
> >>>> rbd_data.4ae87f2eb141f2.000000000000e200 [stat,write 2834432~4096]
> >>>> 3.6b43de72 e13901) v4 currently waiting for subops from [5,31]
> >>>> 2014-09-04 11:56:32.723341 osd.17 [WRN] slow request 30.179681
> >>>> seconds old, received at 2014-09-04 11:56:02.543608:
> >>>> osd_op(client.13425079.0:7014393
> >>>> rbd_data.54f2522eb141f2.0000000000014d01 [stat,write 2502656~4096]
> >>>> 3.d8ceea89 e13901) v4 currently waiting for subops from [31,18]
> >>>> 2014-09-04 11:56:32.723344 osd.17 [WRN] slow request 30.000568
> >>>> seconds old, received at 2014-09-04 11:56:02.722721:
> >>>> osd_op(client.9281279.0:144230325
> >>>> rbd_data.2d99fc2eb141f2.000000000000e80a [stat,write 1589248~4096]
> >>>> 3.16dc0e89 e13901) v4 currently waiting for subops from [31,18]
> >>>> 2014-09-04 11:56:33.511043 osd.22 [WRN] 33 slow requests, 6 included
> >>>> below; oldest blocked for > 48.746486 secs 2014-09-04 11:56:33.511049
> >>>> osd.22 [WRN] slow request 33.034756 seconds old, received at
> >>>> 2014-09-04 11:56:00.476221: osd_op(client.9266625.0:135900605
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2715648~8192]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:33.511053 osd.22 [WRN] slow request 33.034620
> >>>> seconds old, received at 2014-09-04 11:56:00.476357:
> >>>> osd_op(client.9266625.0:135900606
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2756608~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:33.511056 osd.22 [WRN] slow request 33.034446
> >>>> seconds old, received at 2014-09-04 11:56:00.476531:
> >>>> osd_op(client.9266625.0:135900607
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2809856~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:33.511060 osd.22 [WRN] slow request 33.034387
> >>>> seconds old, received at 2014-09-04 11:56:00.476590:
> >>>> osd_op(client.9266625.0:135900608
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2883584~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:33.511063 osd.22 [WRN] slow request 33.034341
> >>>> seconds old, received at 2014-09-04 11:56:00.476636:
> >>>> osd_op(client.9266625.0:135900609
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2891776~8192]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:34.511206 osd.22 [WRN] 38 slow requests, 6 included
> >>>> below; oldest blocked for > 49.746664 secs 2014-09-04 11:56:34.511215
> >>>> osd.22 [WRN] slow request 34.034426 seconds old, received at
> >>>> 2014-09-04 11:56:00.476729: osd_op(client.9266625.0:135900610
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2908160~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:34.511219 osd.22 [WRN] slow request 34.034298
> >>>> seconds old, received at 2014-09-04 11:56:00.476857:
> >>>> osd_op(client.9266625.0:135900611
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2932736~28672]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:34.511222 osd.22 [WRN] slow request 34.034234
> >>>> seconds old, received at 2014-09-04 11:56:00.476921:
> >>>> osd_op(client.9266625.0:135900612
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2969600~8192]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:34.511225 osd.22 [WRN] slow request 34.034147
> >>>> seconds old, received at 2014-09-04 11:56:00.477008:
> >>>> osd_op(client.9266625.0:135900613
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2981888~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:34.511228 osd.22 [WRN] slow request 34.034055
> >>>> seconds old, received at 2014-09-04 11:56:00.477100:
> >>>> osd_op(client.9266625.0:135900614
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 2998272~12288]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:35.153813 osd.37 [WRN] 1 slow requests, 1 included
> >>>> below; oldest blocked for > 30.307864 secs 2014-09-04 11:56:35.153820
> >>>> osd.37 [WRN] slow request 30.307864 seconds old, received at
> >>>> 2014-09-04 11:56:04.845917: osd_op(client.10785413.0:129409910
> >>>> rbd_data.96803f2eb141f2.00000000000042b0 [stat,write 1712128~4096]
> >>>> 3.6c5ac950 e13901) v4 currently waiting for subops from [22,41]
> >>>> 2014-09-04 11:56:35.511450 osd.22 [WRN] 42 slow requests, 6 included
> >>>> below; oldest blocked for > 50.746638 secs 2014-09-04 11:56:35.511455
> >>>> osd.22 [WRN] slow request 35.034219 seconds old, received at
> >>>> 2014-09-04 11:56:00.477178: osd_op(client.9266625.0:135900615
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 3022848~8192]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:35.511459 osd.22 [WRN] slow request 35.034143
> >>>> seconds old, received at 2014-09-04 11:56:00.477254:
> >>>> osd_op(client.9266625.0:135900616
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 3035136~12288]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:35.511462 osd.22 [WRN] slow request 35.034082
> >>>> seconds old, received at 2014-09-04 11:56:00.477315:
> >>>> osd_op(client.9266625.0:135900617
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 3055616~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:35.511465 osd.22 [WRN] slow request 35.033965
> >>>> seconds old, received at 2014-09-04 11:56:00.477432:
> >>>> osd_op(client.9266625.0:135900618
> >>>> rbd_data.42d6792eb141f2.000000000000bc00 [stat,write 3063808~4096]
> >>>> 3.a2894ebe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:35.511469 osd.22 [WRN] slow request 34.162275
> >>>> seconds old, received at 2014-09-04 11:56:01.349122:
> >>>> osd_op(client.12485646.0:110385143
> >>>> rbd_data.4ccab12eb141f2.0000000000015b66 [stat,write 909312~4096]
> >>>> 3.9c416abe e13901) v4 currently waiting for subops from [37,13]
> >>>> 2014-09-04 11:56:36.511603 osd.22 [WRN] 34 slow requests, 6 included
> >>>> below; oldest blocked for > 51.746797 secs 2014-09-04 11:56:36.511609
> >>>> osd.22 [WRN] slow request 34.401476 seconds old, received at
> >>>> 2014-09-04 11:56:02.110080: osd_op(client.12485643.0:117955489
> >>>> rbd_data.4aad332eb141f2.0000000000002c00 [stat,write 2531328~4096]
> >>>> 3.b985ec92 e13901) v4 currently waiting for subops from [33,1]
> >>>> 2014-09-04 11:56:36.511612 osd.22 [WRN] slow request 34.149511
> >>>> seconds old, received at 2014-09-04 11:56:02.362045:
> >>>> osd_op(client.12485793.0:121786505
> >>>> rbd_data.4ae87f2eb141f2.0000000000018a0a [stat,write 3342336~4096]
> >>>> 3.26907492 e13901) v4 currently waiting for subops from [33,1]
> >>>> 2014-09-04 11:56:36.511615 osd.22 [WRN] slow request 34.329528
> >>>> seconds old, received at 2014-09-04 11:56:02.182028:
> >>>> osd_op(client.12646411.0:31118266
> >>>> rbd_data.81aaf52eb141f2.0000000000000e4f [stat,write 0~4194304]
> >>>> 3.168c978d e13901) v4 currently waiting for subops from [49,29]
> >>>> 2014-09-04 11:56:36.511618 osd.22 [WRN] slow request 31.871976
> >>>> seconds old, received at 2014-09-04 11:56:04.639580:
> >>>> osd_op(client.12485793.0:121786506
> >>>> rbd_data.4ae87f2eb141f2.0000000000018a0a [stat,write 0~4096]
> >>>> 3.26907492 e13901) v4 currently waiting for subops from [33,1]
> >>>> 2014-09-04 11:56:36.511621 osd.22 [WRN] slow request 31.008867
> >>>> seconds old, received at 2014-09-04 11:56:05.502689:
> >>>> osd_op(client.9266625.0:135901516
> >>>> rbd_data.42d6792eb141f2.0000000000017436 [stat,write 2682880~4096]
> >>>> 3.32067b97 e13901) v4 currently waiting for subops from [12,29]
> >>>> 2014-09-04 11:56:36.723882 osd.17 [WRN] 5 slow requests, 1 included
> >>>> below; oldest blocked for > 34.606349 secs 2014-09-04 11:56:36.723887
> >>>> osd.17 [WRN] slow request 30.603057 seconds old, received at
> >>>> 2014-09-04 11:56:06.120787: osd_op(client.12483520.0:11473870
> >>>> rbd_data.4b8e9b3d1b58ba.0000000000004600 [stat,write 2293760~4096]
> >>>> 3.49398689 e13901) v4 currently waiting for subops from [31,18]
> >>>> 2014-09-04 11:56:37.511787 osd.22 [WRN] 24 slow requests, 6 included
> >>>> below; oldest blocked for > 52.746984 secs 2014-09-04 11:56:37.511793
> >>>> osd.22 [WRN] slow request 32.008986 seconds old, received at
> >>>> 2014-09-04 11:56:05.502757: osd_op(client.9266625.0:135901517
> >>>> rbd_data.42d6792eb141f2.0000000000017436 [stat,write 2695168~4096]
> >>>> 3.32067b97 e13901) v4 currently waiting for subops from [12,29]
> >>>> 2014-09-04 11:56:37.511798 osd.22 [WRN] slow request 31.749483
> >>>> seconds old, received at 2014-09-04 11:56:05.762260:
> >>>> osd_op(client.9281282.0:55728036
> >>>> rbd_data.2d99f62eb141f2.0000000000003753 [stat,write 1630208~8192]
> >>>> 3.6625df97 e13901) v4 currently waiting for subops from [12,29]
> >>>> 2014-09-04 11:56:37.511801 osd.22 [WRN] slow request 31.745558
> >>>> seconds old, received at 2014-09-04 11:56:05.766185:
> >>>> osd_op(client.9281282.0:55728038
> >>>> rbd_data.2d99f62eb141f2.0000000000003753 [stat,write 1941504~4096]
> >>>> 3.6625df97 e13901) v4 currently waiting for subops from [12,29]
> >>>> 2014-09-04 11:56:37.511803 osd.22 [WRN] slow request 31.390945
> >>>> seconds old, received at 2014-09-04 11:56:06.120798:
> >>>> osd_op(client.12483520.0:11473871
> >>>> rbd_data.4b8e9b3d1b58ba.0000000000005c00 [stat,write 2424832~8192]
> >>>> 3.47dbbb97 e13901) v4 currently waiting for subops from [12,29]
> >>>> 2014-09-04 11:56:37.511806 osd.22 [WRN] slow request 31.390357
> >>>> seconds old, received at 2014-09-04 11:56:06.121386:
> >>>> osd_op(client.12483520.0:11473884
> >>>> rbd_data.4b8e9b3d1b58ba.0000000000005c00 [stat,write 2457600~16384]
> >>>> 3.47dbbb97 e13901) v4 currently waiting for subops from [12,29]
> >>>>
> >>>> Kind Regards,
> >>>>
> >>>> David
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> ceph-users mailing list
> >>>> ceph-users at lists.ceph.com
> >>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >>>>
> >>>
> >>>
> >>> --
> >>> Christian Balzer        Network/Systems Engineer
> >>> chibi at gol.com           Global OnLine Japan/Fusion Communications
> >>> http://www.gol.com/
> >>> _______________________________________________
> >>> ceph-users mailing list
> >>> ceph-users at lists.ceph.com
> >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >>>
> >>> _______________________________________________
> >>> ceph-users mailing list
> >>> ceph-users at lists.ceph.com
> >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> >>
> >
> >
> > --
> > Christian Balzer        Network/Systems Engineer
> > chibi at gol.com         Global OnLine Japan/Fusion Communications
> > http://www.gol.com/
> > _______________________________________________
> > ceph-users mailing list
> > ceph-users at lists.ceph.com
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
> _______________________________________________
> ceph-users mailing list
> ceph-users at lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>



-- 

Luis Periquito

Unix Engineer

Ocado.com <http://www.ocado.com/>

Head Office, Titan Court, 3 Bishop Square, Hatfield Business Park,
Hatfield, Herts AL10 9NE

-- 


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