May I ask why you are using krbd with QEMU instead of librbd? On Fri, Jun 16, 2017 at 12:18 PM, 码云 <[email protected]> wrote: > Hi All, > Recently.I meet a question and I did'nt find out any thing for explain it. > > Ops process like blow: > ceph 10.2.5 jewel, qemu 2.5.0 centos 7.2 x86_64 > create pool rbd_vms 3 replications with cache tier pool 3 replication > too. > create 100 images in rbd_vms > rbd map 100 image to local device, like /dev/rbd0 ... /dev/rbd100 > dd if=/root/win7.qcow2 of=/dev/rbd0 bs=1M count=3000 > virsh define 100 vms(vm0... vm100), 1 vms configured 1 /dev/rbd . > virsh start 100 vms. > > when the 100 vms start concurrence, will caused some vms hang. > when do fio testing in those vms, will casued some vms hang . > > I checked ceph status ,osd status , log etc. all like same as before. > > but check device with iostat -dx 1, some rbd* device are strange. > util% are 100% full, but read and wirte count all are zero. > > i checked virsh log, vms log etc, but not found any useful info. > > Can help to fingure out some infomartion. librbd krbd or other place is > need to adjust some arguments? > > Thanks All. > > ------------------ > 王勇 > 上海德拓信息技术股份有限公司-成都研发中心 > 手机：15908149443 > 邮箱：[email protected] > 地址：四川省成都市天府大道666号希顿国际广场C座1409 > > > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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