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Hi All, I left out my OS/kernel version, Ubuntu 12.04.4 LTS w/ Kernel 3.10.33-031033-generic (We upgrade our kernels to 3.10 due to Dell Drivers). Here’s an example of starting all the OSD’s after a reboot. top - 09:10:51 up 2 min, 1 user, load average: 332.93, 112.28, 39.96 Tasks: 310 total, 1 running, 309 sleeping, 0 stopped, 0 zombie Cpu(s): 50.3%us, 32.5%sy, 0.0%ni, 0.0%id, 0.0%wa, 17.2%hi, 0.0%si, 0.0%st Mem: 32917276k total, 6331224k used, 26586052k free, 1332k buffers Swap: 33496060k total, 0k used, 33496060k free, 1474084k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 15875 root 20 0 910m 381m 50m S 60 1.2 0:50.57 ceph-osd 2996 root 20 0 867m 330m 44m S 59 1.0 0:58.32 ceph-osd 4502 root 20 0 907m 372m 47m S 58 1.2 0:55.14 ceph-osd 12465 root 20 0 949m 418m 55m S 58 1.3 0:51.79 ceph-osd 4171 root 20 0 886m 348m 45m S 57 1.1 0:56.17 ceph-osd 3707 root 20 0 941m 405m 50m S 57 1.3 0:59.68 ceph-osd 3560 root 20 0 924m 394m 51m S 56 1.2 0:59.37 ceph-osd 4318 root 20 0 965m 435m 55m S 56 1.4 0:54.80 ceph-osd 3337 root 20 0 935m 407m 51m S 56 1.3 1:01.96 ceph-osd 3854 root 20 0 897m 366m 48m S 55 1.1 1:00.55 ceph-osd 3143 root 20 0 1364m 424m 24m S 16 1.3 1:08.72 ceph-osd 2509 root 20 0 652m 261m 62m S 2 0.8 0:26.42 ceph-mon 4 root 20 0 0 0 0 S 0 0.0 0:00.08 kworker/0:0 Regards, Quenten Grasso From: ceph-users-bounces@xxxxxxxxxxxxxx [mailto:ceph-users-bounces@xxxxxxxxxxxxxx]
On Behalf Of Quenten Grasso Hi All, I’m trying to troubleshoot a strange issue with my Ceph cluster. We’re Running Ceph Version 0.72.2 All Nodes are Dell R515’s w/ 6C AMD CPU w/ 32GB Ram, 12 x 3TB NearlineSAS Drives and 2 x 100GB Intel DC S3700 SSD’s for Journals. All Pools have a replica of 2 or better. I.e. metadata replica of 3. I have 55 OSD’s in the cluster across 5 nodes. When I restart the OSD’s on a single node (any node) the load average of that node shoots up to 230+ and the whole cluster starts blocking IO requests until it settles down and its fine again. Any ideas on why the load average goes so crazy & starts to block IO?
<snips from my ceph.conf> [osd] osd data = ""> osd journal size = 15000 osd mkfs type = xfs osd mkfs options xfs = "-i size=2048 -f" osd mount options xfs = "rw,noexec,nodev,noatime,nodiratime,barrier=0,inode64,logbufs=8,logbsize=256k" osd max backfills = 5 osd recovery max active = 3 [osd.0] host = pbnerbd01 public addr = 10.100.96.10 cluster addr = 10.100.128.10 osd journal = /dev/disk/by-id/scsi-36b8ca3a0eaa2660019deaf8d3a40bec4-part1 devs = /dev/sda4 </end> Thanks, Quenten |
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