On Fri, Sep 5, 2014 at 3:24 AM, James Devine <fxmulder at gmail.com> wrote: > It took a week to happen again, I had hopes that it was fixed but alas it is > not. Looking at top logs on the active mds server, the load average was > 0.00 the whole time and memory usage never changed much, it is using close > to 100% and some swap but since I changed memory.swappiness swap usage > hasn't gone up but has been slowly coming back down. Same symptoms, the > mount on the client is unresponsive and a cat on > /sys/kernel/debug/ceph/*/mdsc had a whole list of entries. A umount and > remount seems to fix it. > which version of kernel do you use ? Yan, Zheng > > On Fri, Aug 29, 2014 at 11:26 AM, James Devine <fxmulder at gmail.com> wrote: >> >> I am running active/standby and it didn't swap over to the standby. If I >> shutdown the active server it swaps to the standby fine though. When there >> were issues, disk access would back up on the webstats servers and a cat of >> /sys/kernel/debug/ceph/*/mdsc would have a list of entries whereas normally >> it would only list one or two if any. I have 4 cores and 2GB of ram on the >> mds machines. Watching it right now it is using most of the ram and some of >> swap although most of the active ram is disk cache. I lowered the >> memory.swappiness value to see if that helps. I'm also logging top output >> if it happens again. >> >> >> On Thu, Aug 28, 2014 at 8:22 PM, Yan, Zheng <ukernel at gmail.com> wrote: >>> >>> On Fri, Aug 29, 2014 at 8:36 AM, James Devine <fxmulder at gmail.com> wrote: >>> > >>> > On Thu, Aug 28, 2014 at 1:30 PM, Gregory Farnum <greg at inktank.com> >>> > wrote: >>> >> >>> >> On Thu, Aug 28, 2014 at 10:36 AM, Brian C. Huffman >>> >> <bhuffman at etinternational.com> wrote: >>> >> > Is Ceph Filesystem ready for production servers? >>> >> > >>> >> > The documentation says it's not, but I don't see that mentioned >>> >> > anywhere >>> >> > else. >>> >> > http://ceph.com/docs/master/cephfs/ >>> >> >>> >> Everybody has their own standards, but Red Hat isn't supporting it for >>> >> general production use at this time. If you're brave you could test it >>> >> under your workload for a while and see how it comes out; the known >>> >> issues are very much workload-dependent (or just general concerns over >>> >> polish). >>> >> -Greg >>> >> Software Engineer #42 @ http://inktank.com | http://ceph.com >>> >> _______________________________________________ >>> >> ceph-users mailing list >>> >> ceph-users at lists.ceph.com >>> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> > >>> > >>> > >>> > I've been testing it with our webstats since it gets live hits but >>> > isn't >>> > customer affecting. Seems the MDS server has problems every few days >>> > requiring me to umount and remount the ceph disk to resolve. Not sure >>> > if >>> > the issue is resolved in development versions but as of 0.80.5 we seem >>> > to be >>> > hitting it. I set the log verbosity to 20 so there's tons of logs but >>> > ends >>> > with >>> >>> The cephfs client is supposed to be able to handle MDS takeover. >>> what's symptom makes you umount and remount the cephfs ? >>> >>> > >>> > 2014-08-24 07:10:19.682015 7f2b575e7700 10 mds.0.14 laggy, deferring >>> > client_request(client.92141:6795587 getattr pAsLsXsFs #10000026dc1) >>> > 2014-08-24 07:10:19.682021 7f2b575e7700 5 mds.0.14 is_laggy 19.324963 >>> > > 15 >>> > since last acked beacon >>> > 2014-08-24 07:10:20.358011 7f2b554e2700 10 mds.0.14 beacon_send >>> > up:active >>> > seq 127220 (currently up:active) >>> > 2014-08-24 07:10:21.515899 7f2b575e7700 5 mds.0.14 is_laggy 21.158841 >>> > > 15 >>> > since last acked beacon >>> > 2014-08-24 07:10:21.515912 7f2b575e7700 10 mds.0.14 laggy, deferring >>> > client_session(request_renewcaps seq 26766) >>> > 2014-08-24 07:10:21.515915 7f2b575e7700 5 mds.0.14 is_laggy 21.158857 >>> > > 15 >>> > since last acked beacon >>> > 2014-08-24 07:10:21.981148 7f2b575e7700 10 mds.0.snap check_osd_map >>> > need_to_purge={} >>> > 2014-08-24 07:10:21.981176 7f2b575e7700 5 mds.0.14 is_laggy 21.624117 >>> > > 15 >>> > since last acked beacon >>> > 2014-08-24 07:10:23.170528 7f2b575e7700 5 mds.0.14 handle_mds_map >>> > epoch 93 >>> > from mon.0 >>> > 2014-08-24 07:10:23.175367 7f2b532d5700 0 -- 10.251.188.124:6800/985 >>> > >> >>> > 10.251.188.118:0/2461578479 pipe(0x5588a80 sd=23 :6800 s=2 pgs=91 cs=1 >>> > l=0 >>> > c=0x2cbfb20).fault with nothing to send, going to standby >>> > 2014-08-24 07:10:23.175376 7f2b533d6700 0 -- 10.251.188.124:6800/985 >>> > >> >>> > 10.251.188.55:0/306923677 pipe(0x5588d00 sd=22 :6800 s=2 pgs=7 cs=1 l=0 >>> > c=0x2cbf700).fault with nothing to send, going to standby >>> > 2014-08-24 07:10:23.175380 7f2b531d4700 0 -- 10.251.188.124:6800/985 >>> > >> >>> > 10.251.188.31:0/2854230502 pipe(0x5589480 sd=24 :6800 s=2 pgs=881 cs=1 >>> > l=0 >>> > c=0x2cbfde0).fault with nothing to send, going to standby >>> > 2014-08-24 07:10:23.175438 7f2b534d7700 0 -- 10.251.188.124:6800/985 >>> > >> >>> > 10.251.188.68:0/2928927296 pipe(0x5588800 sd=21 :6800 s=2 pgs=7 cs=1 >>> > l=0 >>> > c=0x2cbf5a0).fault with nothing to send, going to standby >>> > 2014-08-24 07:10:23.184201 7f2b575e7700 10 mds.0.14 my compat >>> > compat={},rocompat={},incompat={1=base v0.20,2=client writeable >>> > ranges,3=default file layouts on dirs,4=dir inode in separate >>> > object,5=mds >>> > uses versioned encoding,6=dirfrag is stored in omap,7=mds uses inline >>> > data} >>> > 2014-08-24 07:10:23.184255 7f2b575e7700 10 mds.0.14 mdsmap compat >>> > compat={},rocompat={},incompat={1=base v0.20,2=client writeable >>> > ranges,3=default file layouts on dirs,4=dir inode in separate >>> > object,5=mds >>> > uses versioned encoding,6=dirfrag is stored in omap} >>> > 2014-08-24 07:10:23.184264 7f2b575e7700 10 mds.-1.-1 map says i am >>> > 10.251.188.124:6800/985 mds.-1.-1 state down:dne >>> > 2014-08-24 07:10:23.184275 7f2b575e7700 10 mds.-1.-1 peer mds gid >>> > 94665 >>> > removed from map >>> > 2014-08-24 07:10:23.184282 7f2b575e7700 1 mds.-1.-1 handle_mds_map i >>> > (10.251.188.124:6800/985) dne in the mdsmap, respawning myself >>> > 2014-08-24 07:10:23.184284 7f2b575e7700 1 mds.-1.-1 respawn >>> > 2014-08-24 07:10:23.184286 7f2b575e7700 1 mds.-1.-1 e: >>> > '/usr/bin/ceph-mds' >>> > 2014-08-24 07:10:23.184288 7f2b575e7700 1 mds.-1.-1 0: >>> > '/usr/bin/ceph-mds' >>> > 2014-08-24 07:10:23.184289 7f2b575e7700 1 mds.-1.-1 1: '-i' >>> > 2014-08-24 07:10:23.184290 7f2b575e7700 1 mds.-1.-1 2: >>> > 'ceph-cluster1-mds2' >>> > 2014-08-24 07:10:23.184291 7f2b575e7700 1 mds.-1.-1 3: '--pid-file' >>> > 2014-08-24 07:10:23.184292 7f2b575e7700 1 mds.-1.-1 4: >>> > '/var/run/ceph/mds.ceph-cluster1-mds2.pid' >>> > 2014-08-24 07:10:23.184293 7f2b575e7700 1 mds.-1.-1 5: '-c' >>> > 2014-08-24 07:10:23.184294 7f2b575e7700 1 mds.-1.-1 6: >>> > '/etc/ceph/ceph.conf' >>> > 2014-08-24 07:10:23.184295 7f2b575e7700 1 mds.-1.-1 7: '--cluster' >>> > 2014-08-24 07:10:23.184296 7f2b575e7700 1 mds.-1.-1 8: 'ceph' >>> > 2014-08-24 07:10:23.274640 7f2b575e7700 1 mds.-1.-1 exe_path >>> > /usr/bin/ceph-mds >>> > 2014-08-24 07:10:23.606875 7f4c55abb800 0 ceph version 0.80.5 >>> > (38b73c67d375a2552d8ed67843c8a65c2c0feba6), process ceph-mds, pid 987 >>> > 2014-08-24 07:10:49.024862 7f4c506ad700 1 mds.-1.0 handle_mds_map >>> > standby >>> > 2014-08-24 07:10:49.199676 7f4c506ad700 0 mds.-1.0 handle_mds_beacon >>> > no >>> > longer laggy >>> > 2014-08-24 07:10:50.215240 7f4c506ad700 1 mds.-1.0 handle_mds_map >>> > standby >>> > 2014-08-24 07:10:51.290407 7f4c506ad700 1 mds.-1.0 handle_mds_map >>> > standby >>> > >>> > >>> >>> Did you use active/standby MDS setup? Did the MDS use lots of memory >>> before it crashed? >>> >>> Regards >>> Yan, Zheng >>> >>> > >>> > _______________________________________________ >>> > 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 >
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