Hi Erich,
Here is how to map the client ID to some extra info:
ceph tell mds.0 client ls id=99445
Here is how to map inode ID to the path:
ceph tell mds.0 dump inode 0x100081b9ceb | jq -r .path
On Fri, Mar 29, 2024 at 1:12 AM Erich Weiler <weiler@xxxxxxxxxxxx> wrote:
>
> Here are some of the MDS logs:
>
> Mar 27 11:58:25 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 511.703289 seconds old, received at
> 2024-03-27T18:49:53.623192+0000: client_request(client.99375:459393
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:49:53.620806+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:25 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 690.189459 seconds old, received at
> 2024-03-27T18:46:55.137022+0000: client_request(client.99445:4189994
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:46:55.134857+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:25 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 686.308604 seconds old, received at
> 2024-03-27T18:46:59.017876+0000: client_request(client.99445:4190508
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:46:59.018864+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:25 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 686.156943 seconds old, received at
> 2024-03-27T18:46:59.169537+0000: client_request(client.99400:591887
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:46:59.170644+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:26 pr-md-01.prism ceph-mds[1296468]:
> mds.slugfs.pr-md-01.xdtppo Updating MDS map to version 16631 from mon.0
> Mar 27 11:58:30 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : 16 slow requests, 0 included below; oldest blocked for >
> 699.385743 secs
> Mar 27 11:58:34 pr-md-01.prism ceph-mds[1296468]:
> mds.slugfs.pr-md-01.xdtppo Updating MDS map to version 16632 from mon.0
> Mar 27 11:58:35 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : 16 slow requests, 0 included below; oldest blocked for >
> 704.385896 secs
> Mar 27 11:58:38 pr-md-01.prism ceph-mds[1296468]:
> mds.slugfs.pr-md-01.xdtppo Updating MDS map to version 16633 from mon.0
> Mar 27 11:58:40 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : 16 slow requests, 0 included below; oldest blocked for >
> 709.385979 secs
> Mar 27 11:58:42 pr-md-01.prism ceph-mds[1296468]:
> mds.slugfs.pr-md-01.xdtppo Updating MDS map to version 16634 from mon.0
> Mar 27 11:58:45 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : 78 slow requests, 5 included below; oldest blocked for >
> 714.386040 secs
> Mar 27 11:58:45 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 710.189838 seconds old, received at
> 2024-03-27T18:46:55.137022+0000: client_request(client.99445:4189994
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:46:55.134857+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:45 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 706.308983 seconds old, received at
> 2024-03-27T18:46:59.017876+0000: client_request(client.99445:4190508
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:46:59.018864+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:45 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 706.157322 seconds old, received at
> 2024-03-27T18:46:59.169537+0000: client_request(client.99400:591887
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:46:59.170644+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:45 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 706.086751 seconds old, received at
> 2024-03-27T18:46:59.240108+0000: client_request(client.99400:591894
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:46:59.242644+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:45 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 705.196030 seconds old, received at
> 2024-03-27T18:47:00.130829+0000: client_request(client.99400:591985
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:47:00.130641+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
> Mar 27 11:58:45 pr-md-01.prism ceph-mds[1296468]:
> mds.slugfs.pr-md-01.xdtppo Updating MDS map to version 16635 from mon.0
> Mar 27 11:58:50 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : 16 slow requests, 0 included below; oldest blocked for >
> 719.386116 secs
> Mar 27 11:58:53 pr-md-01.prism ceph-mds[1296468]:
> mds.slugfs.pr-md-01.xdtppo Updating MDS map to version 16636 from mon.0
> Mar 27 11:58:55 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : 16 slow requests, 0 included below; oldest blocked for >
> 724.386184 secs
> Mar 27 11:58:57 pr-md-01.prism ceph-mds[1296468]:
> mds.slugfs.pr-md-01.xdtppo Updating MDS map to version 16637 from mon.0
> Mar 27 11:59:00 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : 16 slow requests, 0 included below; oldest blocked for >
> 729.386333 secs
> Mar 27 11:59:02 pr-md-01.prism ceph-mds[1296468]:
> mds.slugfs.pr-md-01.xdtppo Updating MDS map to version 16638 from mon.0
> Mar 27 11:59:05 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : 53 slow requests, 5 included below; oldest blocked for >
> 734.386400 secs
> Mar 27 11:59:05 pr-md-01.prism ceph-mds[1296468]: log_channel(cluster)
> log [WRN] : slow request 730.190197 seconds old, received at
> 2024-03-27T18:46:55.137022+0000: client_request(client.99445:4189994
> getattr AsXsFs #0x100081b9ceb 2024-03-27T18:46:55.134857+0000
> caller_uid=30150, caller_gid=600{600,608,999,}) currently joining batch
> getattr
>
> Can we tell which client the slow requests are coming from? It says
> stuff like "client.99445:4189994" but I don't know how to map that to a
> client...
>
> Thanks for the response!
>
> -erich
>
> On 3/27/24 21:28, Xiubo Li wrote:
> >
> > On 3/28/24 04:03, Erich Weiler wrote:
> >> Hi All,
> >>
> >> I've been battling this for a while and I'm not sure where to go from
> >> here. I have a Ceph health warning as such:
> >>
> >> # ceph -s
> >> cluster:
> >> id: 58bde08a-d7ed-11ee-9098-506b4b4da440
> >> health: HEALTH_WARN
> >> 1 MDSs report slow requests
> >
> > There had slow requests. I just suspect the behind on trimming was
> > caused by this.
> >
> > Could you share the logs about the slow requests ? What are they ?
> >
> > Thanks
> >
> >
> >> 1 MDSs behind on trimming
> >>
> >> services:
> >> mon: 5 daemons, quorum
> >> pr-md-01,pr-md-02,pr-store-01,pr-store-02,pr-md-03 (age 5d)
> >> mgr: pr-md-01.jemmdf(active, since 3w), standbys: pr-md-02.emffhz
> >> mds: 1/1 daemons up, 2 standby
> >> osd: 46 osds: 46 up (since 9h), 46 in (since 2w)
> >>
> >> data:
> >> volumes: 1/1 healthy
> >> pools: 4 pools, 1313 pgs
> >> objects: 260.72M objects, 466 TiB
> >> usage: 704 TiB used, 424 TiB / 1.1 PiB avail
> >> pgs: 1306 active+clean
> >> 4 active+clean+scrubbing+deep
> >> 3 active+clean+scrubbing
> >>
> >> io:
> >> client: 123 MiB/s rd, 75 MiB/s wr, 109 op/s rd, 1.40k op/s wr
> >>
> >> And the specifics are:
> >>
> >> # ceph health detail
> >> HEALTH_WARN 1 MDSs report slow requests; 1 MDSs behind on trimming
> >> [WRN] MDS_SLOW_REQUEST: 1 MDSs report slow requests
> >> mds.slugfs.pr-md-01.xdtppo(mds.0): 99 slow requests are blocked >
> >> 30 secs
> >> [WRN] MDS_TRIM: 1 MDSs behind on trimming
> >> mds.slugfs.pr-md-01.xdtppo(mds.0): Behind on trimming (13884/250)
> >> max_segments: 250, num_segments: 13884
> >>
> >> That "num_segments" number slowly keeps increasing. I suspect I just
> >> need to tell the MDS servers to trim faster but after hours of
> >> googling around I just can't figure out the best way to do it. The
> >> best I could come up with was to decrease "mds_cache_trim_decay_rate"
> >> from 1.0 to .8 (to start), based on this page:
> >>
> >> https://www.suse.com/support/kb/doc/?id=000019740
> >>
> >> But it doesn't seem to help, maybe I should decrease it further? I am
> >> guessing this must be a common issue...? I am running Reef on the MDS
> >> servers, but most clients are on Quincy.
> >>
> >> Thanks for any advice!
> >>
> >> cheers,
> >> erich
> >> _______________________________________________
> >> ceph-users mailing list -- ceph-users@xxxxxxx
> >> To unsubscribe send an email to ceph-users-leave@xxxxxxx
> >>
> >
> _______________________________________________
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--
Alexander E. Patrakov
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