Logging might well help. http://ceph.com/docs/master/rados/troubleshooting/log-and-debug/ On 07/31/2013 03:51 PM, Erik Logtenberg wrote:
Hi, I just added a second node to my ceph test platform. The first node has a mon and three osd's, the second node only has three osd's. Adding the osd's was pretty painless, and ceph distributed the data from the first node evenly over both nodes so everything seems to be fine. The monitor also thinks everything is fine: 2013-08-01 00:41:12.719640 mon.0 [INF] pgmap v1283: 292 pgs: 292 active+clean; 9264 MB data, 24826 MB used, 5541 GB / 5578 GB avail Unfortunately, the three osd's on the second node keep eating a lot of cpu, while there is no activity whatsoever: PID USER VIRT RES SHR S %CPU %MEM TIME+ COMMAND 21272 root 441440 34632 7848 S 61.8 0.9 4:08.62 ceph-osd 21145 root 439852 29316 8360 S 60.4 0.7 4:04.31 ceph-osd 21036 root 443828 31324 8336 S 60.1 0.8 4:07.55 ceph-osd Any idea why that is and how I can even ask an osd what it's doing? There is no corresponding hdd activity, it's only cpu and hardly any memory usage. Also the monitor on the first node is doing the same thing: PID USER VIRT RES SHR S %CPU %MEM TIME+ COMMAND 12825 root 186900 23492 5540 S 141.1 0.590 9:47.64 ceph-mon I tried stopping the three osd's: that makes the monitor calm down, but after restarting the osd's, the monitor resumes its cpu usage. I also tried stopping the monitor, which makes the three osd's calm down, but once again they will start eating cpu again as soon as the monitor is back online. In the mean time, the first three osd's, the ones on the same machine as the monitor, don't behave like this at all. Currently as there is no activity, they are just idling on low cpu usage, as expected. Kind regards, Erik. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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