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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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