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 <vbellur@xxxxxxxxxx> 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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