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.
Jan > On 31 Dec 2015, at 04:49, Sam Huracan <[email protected]> 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=testwriterandom > > It 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/Node > > Here is my ceph.conf in node compute: > http://pastebin.com/raw/wsyDHiRw <http://pastebin.com/raw/wsyDHiRw> > > > Could you help me solve this issue? > > Thanks and regards. > > > > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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