hi,all i am testing rbd performance, now there is only one vm which is using rbd as its disk, and inside it fio is doing r/w. the big diffenence is that i set a big iodepth other than iodepth=1. how do you think about it, which part is using up cpu? i want to find the root cause. ---default options---- osd_op_threads": "2", "osd_disk_threads": "1", "osd_recovery_threads": "1", "filestore_op_threads": "2", thanks top - 19:50:08 up 1 day, 10:26, 2 users, load average: 1.55, 0.97, 0.81 Tasks: 97 total, 1 running, 96 sleeping, 0 stopped, 0 zombie Cpu(s): 37.6%us, 14.2%sy, 0.0%ni, 37.0%id, 9.4%wa, 0.0%hi, 1.3%si, 0.5%st Mem: 1922540k total, 1820196k used, 102344k free, 23100k buffers Swap: 1048568k total, 91724k used, 956844k free, 1052292k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4312 root 20 0 1100m 337m 5192 S 107.3 18.0 88:33.27 ceph-osd 1704 root 20 0 514m 272m 3648 S 0.7 14.5 3:27.19 ceph-mon -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140910/8321d005/attachment.htm>
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