Yep, it happen on every run, I have checked on other VMs that do not use Ceph, it had almost no delay, although results were about similarly, 576 iops for Ceph's VM and 650 for non-Ceph VM, I use one image for all test, ubuntu 14.04.1, kernel 3.13.0-32-generic
2015-12-31 23:51 GMT+07:00 Jan Schermer <jan@xxxxxxxxxxx>:
Is it only on the first run or on every run?Fio first creates the file and that can take a while depeding on how fallocate() works on your system. In other words you are probably waiting for a 1G file to be written before the test actually starts.JanOn 31 Dec 2015, at 04:49, Sam Huracan <nowitzki.sammy@xxxxxxxxx> wrote:_______________________________________________Hi Ceph-users.I have an issue with my new Ceph Storage, which is backend for OpenStack (Cinder, Glance, Nova).When I test random write in VMs with fio, there is a long delay (60s) before fio begin running.Here is my script test:fio --directory=/root/ --direct=1 --rw=randwrite --bs=4k --size=1G --numjobs=3 --iodepth=4 --runtime=60 --group_reporting --name=testIOPslan1 --output=testwriterandomIt is so strange, because I have not ever seen this method when I test in Physical machine.My Ceph system include 5 node, 2 SAS 15k per node, I use both journal and Filestore in one disk, Public Network 1 Gbps/Node, Replica Network 2 Gbps/NodeHere is my ceph.conf in node compute:Could you help me solve this issue?Thanks and regards.
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
_______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
