>> If I remember, some openvz features works only with cfq ? (ionice, openvz IO >> priorities) >> see: >> http://pve.proxmox.com/pipermail/pve-devel/2012-March/002488.html > > Yes, but we measure incredible bad performance with cfq. We get fsync > rates of 250 instead of 3000 on ext4 (factor 12!). So iopriorities makes no > sense if you are already 10 time slower?
Could you share the test conditions? I tried to reproduce on: 1) Hardware RAID 0+1 with write cache and BBU + ext3, "dbench -t 60 50" resulted with the "deadline" just a bit faster 2) HDD 500GB (Desktop system) + ext4, "dbench -t 60 50" resulted with almost no difference between CFQ and DEADLINE Best regards, Stanislav _______________________________________________ pve-devel mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
