From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: Re: reproducable osd crash Date: Thu, 21 Jun 2012 21:57:37 +0200 Message-ID: <4FE37CB1.5060906@profihost.ag> References: <4FE319DF.3020106@profihost.ag> <4FE31C96.6050901@profihost.ag> <4FE31DDD.3090207@profihost.ag> <4FE32056.9070301@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail.profihost.ag ([85.158.179.208]:41880 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760033Ab2FUT5i (ORCPT ); Thu, 21 Jun 2012 15:57:38 -0400 In-Reply-To: <4FE32056.9070301@profihost.ag> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: "ceph-devel@vger.kernel.org" OK i discovered this time that all osds had the same disk usage before=20 crash. After starting the osd again i got this one: /dev/sdb1 224G 23G 191G 11% /srv/osd.30 /dev/sdc1 224G 1,5G 213G 1% /srv/osd.31 /dev/sdd1 224G 1,5G 213G 1% /srv/osd.32 /dev/sde1 224G 1,6G 213G 1% /srv/osd.33 So instead of 1,5GB osd 30 now uses 23G. Stefan Am 21.06.2012 15:23, schrieb Stefan Priebe - Profihost AG: > Mhm is this normal (ceph health is NOW OK again) > > /dev/sdb1 224G 655M 214G 1% /srv/osd.20 > /dev/sdc1 224G 640M 214G 1% /srv/osd.21 > /dev/sdd1 224G 34G 181G 16% /srv/osd.22 > /dev/sde1 224G 608M 214G 1% /srv/osd.23 > > Why does one OSD has so much more used space than the others? > > On my other OSD nodes all have around 600MB-700MB. Even when i reform= at > /dev/sdd1 after the backfill it has again 34GB? > > Stefan > > Am 21.06.2012 15:13, schrieb Stefan Priebe - Profihost AG: >> Another strange thing. Why does THIS OSD have 24GB and the others ju= st >> 650MB? >> >> /dev/sdb1 224G 654M 214G 1% /srv/osd.20 >> /dev/sdc1 224G 638M 214G 1% /srv/osd.21 >> /dev/sdd1 224G 24G 190G 12% /srv/osd.22 >> /dev/sde1 224G 607M 214G 1% /srv/osd.23 >> >>> When i start now the OSD again it seems to hang for forever. Load g= oes >>> up to 200 and I/O Waits rise vom 0% to 20%. >>> >>> Am 21.06.2012 14:55, schrieb Stefan Priebe - Profihost AG: >>>> Hello list, >>>> >>>> i'm able to reproducably crash osd daemons. >>>> >>>> How i can reproduce: >>>> >>>> Kernel: 3.5.0-rc3 >>>> Ceph: 0.47.3 >>>> FS: btrfs >>>> Journal: 2GB tmpfs per OSD >>>> OSD: 3x servers with 4x Intel SSD OSDs each >>>> 10GBE Network >>>> rbd_cache_max_age: 2.0 >>>> rbd_cache_size: 33554432 >>>> >>>> Disk is set to writeback. >>>> >>>> Start a KVM VM via PXE with the disk attached in writeback mode. >>>> >>>> Then run randwrite stress more than 2 time. Mostly OSD 22 in my ca= se >>>> crashes. >>>> >>>> # fio --filename=3D/dev/vda1 --direct=3D1 --rw=3Drandwrite --bs=3D= 4k >>>> --size=3D200G >>>> --numjobs=3D50 --runtime=3D90 --group_reporting --name=3Dfile1; fi= o >>>> --filename=3D/dev/vda1 --direct=3D1 --rw=3Drandwrite --bs=3D4k --s= ize=3D200G >>>> --numjobs=3D50 --runtime=3D90 --group_reporting --name=3Dfile1; fi= o >>>> --filename=3D/dev/vda1 --direct=3D1 --rw=3Drandwrite --bs=3D4k --s= ize=3D200G >>>> --numjobs=3D50 --runtime=3D90 --group_reporting --name=3Dfile1; ha= lt >>>> >>>> Strangely exactly THIS OSD also has the most log entries: >>>> 64K ceph-osd.20.log >>>> 64K ceph-osd.21.log >>>> 1,3M ceph-osd.22.log >>>> 64K ceph-osd.23.log >>>> >>>> But all OSDs are set to debug osd =3D 20. >>>> >>>> dmesg shows: >>>> ceph-osd[5381]: segfault at 3f592c000 ip 00007fa281d8eb23 sp >>>> 00007fa27702d260 error 4 in libtcmalloc.so.0.0.0[7fa281d6a000+3d00= 0] >>>> >>>> I uploaded the following files: >>>> priebe_fio_randwrite_ceph-osd.21.log.bz2 =3D> OSD which was OK and= didn't >>>> crash >>>> priebe_fio_randwrite_ceph-osd.22.log.bz2 =3D> Log from the crashed= OSD >>>> =FCu >>>> priebe_fio_randwrite_core.ssdstor001.27204.bz2 =3D> Core dump >>>> priebe_fio_randwrite_ceph-osd.bz2 =3D> osd binary >>>> >>>> Stefan >>> -- >>> To unsubscribe from this list: send the line "unsubscribe ceph-deve= l" in >>> the body of a message to majordomo@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html