Hey, We had similar problems. Look for information on "Filestore merge and split". Some explain: The OSD, after reaching a certain number of files in the directory (it depends of 'filestore merge threshold' and 'filestore split multiple' parameters) rebuilds the structure of this directory. If the files arrives, the OSD creates new subdirectories and moves some of the files there. If the files are missing the OSD will reduce the number of subdirectories. -- Piotr Nowosielski Senior Systems Engineer Zespół Infrastruktury 5 Grupa Allegro sp. z o.o. Tel: +48 512 08 55 92 Grupa Allegro Sp. z o.o. z siedzibą w Poznaniu, 60-166 Poznań, przy ul. Grunwaldzka 182, wpisana do rejestru przedsiębiorców prowadzonego przez Sąd Rejonowy Poznań - Nowe Miasto i Wilda, Wydział VIII Gospodarczy Krajowego Rejestru Sądowego pod numerem KRS 0000268796, o kapitale zakładowym w wysokości 33 976 500,00 zł, posiadająca numer identyfikacji podatkowej NIP: 5272525995. -----Original Message----- From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Anton Dmitriev Sent: Wednesday, May 10, 2017 8:14 AM To: ceph-users@xxxxxxxxxxxxxx Subject: Re: All OSD fails after few requests to RGW Hi! I increased pg_num and pgp_num for pool default.rgw.buckets.data from 2048 to 4096, and it seems that situation became a bit better, cluster dies after 20-30 PUTs, not after 1. Could someone please give me some recommendations how to rescue the cluster? On 27.04.2017 09:59, Anton Dmitriev wrote: > Cluster was going well for a long time, but on the previous week osds > start to fail. > We use cluster like image storage for Opennebula with small load and > like object storage with high load. > Sometimes disks of some osds utlized by 100 %, iostat shows avgqu-sz > over 1000, while reading or writing a few kilobytes in a second, osds > on this disks become unresponsive and cluster marks them down. We > lower the load to object storage and situation became better. > > Yesterday situation became worse: > If RGWs are disabled and there is no requests to object storage > cluster performing well, but if enable RGWs and make a few PUTs or > GETs all not SSD osds on all storages become in the same situation, > described above. > IOtop shows, that xfsaild/<disk> burns disks. > > trace-cmd record -e xfs\* for a 10 seconds shows 10 milion objects, > as i understand it means ~360 000 objects to push per one osd for a 10 > seconds > $ wc -l t.t > 10256873 t.t > > fragmentation on one of such disks is about 3% > > more information about cluster: > > https://yadi.sk/d/Y63mXQhl3HPvwt > > also debug logs for osd.33 while problem occurs > > https://yadi.sk/d/kiqsMF9L3HPvte > > debug_osd = 20/20 > debug_filestore = 20/20 > debug_tp = 20/20 > > > > Ubuntu 14.04 > $ uname -a > Linux storage01 4.2.0-42-generic #49~14.04.1-Ubuntu SMP Wed Jun 29 > 20:22:11 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux > > Ceph 10.2.7 > > 7 storages: Supermicro 28 osd 4tb 7200 JBOD + journal raid10 4 ssd > intel 3510 800gb + 2 osd SSD intel 3710 400gb for rgw meta and index > One of this storages differs only in number of osd, it has 26 osd on > 4tb, instead of 28 on others > > Storages connect to each other by bonded 2x10gbit Clients connect to > storages by bonded 2x1gbit > > in 5 storages 2 x CPU E5-2650v2 and 256 gb RAM in 2 storages 2 x CPU > E5-2690v3 and 512 gb RAM > > 7 mons > 3 rgw > > Help me please to rescue the cluster. > > -- Dmitriev Anton _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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