Hi experts, When I test io performance of rbd volume in pure ssd pool with fio in kvm vm, the iops decreased from 15k to 5k, while nums of qemu threads on host increased from about 200 to about 700, cpu usage of qemu process on host increased from 600% to 1400%. My testing scene is as following: rw=randwrite direct=1 numjobs=64 ioengine=sync bsrange=4k-4k runtime=180 The version of some packages are as following: ceph: 0.94.3 qemu-kvm: 2.1.2 host kernel: 3.10 What's maybe the problem? Appreciate for any help. Best Regards, Jackie _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |