Hi Vijay, I rerun the test with gluster 3.7.11and found that the utilization still high when i use libgfapi. The write performance is also no good.
Below are the info and results: Hypervisor host: libvirt 1.2.17-13.el7_2.4 qemu-kvm 2.1.2-23.el7.1 WIndows VM: Windows 2008R2 IOmeter Ubuntu VM: Ubuntu 14.04 fio 2.1.3 Windows VM (libgfapi) 4k random read IOPS 22920.76 Avg. response time (ms) 0.65 CPU utilization total (%) 82.02 CPU Privilegde time (%) 77.76 4k random write IOPS 4526.39 Avg. response time (ms) 3.26 CPU utilization total (%) 93.61 CPU Privilegde time (%) 90.24 Windows VM (fuse) 4k random read IOPS 14662.86 Avg. response time (ms) 1.08 CPU utilization total (%) 27.66 CPU Privilegde time (%) 24.45 4k random write IOPS 16911.66 Avg. response time (ms) 0.94 CPU utilization total (%) 26.74 CPU Privilegde time (%) 22.64 Ubuntu VM (libgfapi) 4k random read IOPS 34364 Avg. response time (ms) 0.46 CPU utilization total (%) 6.09 4k random write IOPS 4531 Avg. response time (ms) 3.53 CPU utilization total (%) 1.2 Ubuntu VM (fuse) 4k random read IOPS 17341 Avg. response time (ms) 0.92 CPU utilization total (%) 4.22 4k random write IOPS 17611 Avg. response time (ms) 0.91 CPU utilization total (%) 4.65 Any comments on this or things i should try? Thanks. Cw On Mon, Apr 18, 2016 at 10:00 PM, Vijay Bellur <[email protected]> wrote: > On 04/18/2016 06:50 AM, qingwei wei wrote: > >> Hi, >> >> I posted this on gluster-users mailing list but got no response so far. >> >> http://www.gluster.org/pipermail/gluster-users/2016-March/025727.html >> >> Basically, Windows guest OS CPU consumption is very high when i run some >> IO workload. This si not happening for NFS or fuse mount gluster volume. >> Anyone here experience the same also? >> >> > Is a similar behavior being observed with Linux guests too? > > I also observe that the setup consists of 3.7.8. I would recommend using > 3.7.9 or higher as 3.7.8 had a performance regression problem. > > Some windows guests also need tuning to keep CPU consumption under > control. One such article can be found in the proxmox wiki [1]. > > HTH, > Vijay > > [1] http://pve.proxmox.com/wiki/Performance_Tweaks#Windows >
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