Re: [Users] Extremely poor disk access speeds in Windows guest

Not sure what a good method to bench this would be, but: An NFS mount point on virt host: [root@ovirt001 iso-store]# dd if=/dev/zero of=test1 bs=4k count=100000 100000+0 records in 100000+0 records out 409600000 bytes (410 MB) copied, 3.95399 s, 104 MB/s Raw brick performance on gluster server (yes, I know I shouldn't write directly to the brick): [root@gluster1 iso-store]# dd if=/dev/zero of=test bs=4k count=100000 100000+0 records in 100000+0 records out 409600000 bytes (410 MB) copied, 3.06743 s, 134 MB/s Gluster mount point on gluster server: [root@gluster1 iso-store]# dd if=/dev/zero of=test bs=4k count=100000 100000+0 records in 100000+0 records out 409600000 bytes (410 MB) copied, 19.5766 s, 20.9 MB/s The storage servers are a bit older, but are both dual socket quad core opterons with 4x 7200rpm drives. I'm in the process of setting up a share from my desktop and I'll see if I can bench between the two systems. Not sure if my ssd will impact the tests, I've heard there isn't an advantage using ssd storage for glusterfs. Does anyone have a hardware reference design for glusterfs as a backend for virt? Or is there a benchmark utility?

*Steve Dainard * IT Infrastructure Manager Miovision <http://miovision.com/> | *Rethink Traffic* 519-513-2407 ex.250 877-646-8476 (toll-free) *Blog <http://miovision.com/blog> | **LinkedIn <https://www.linkedin.com/company/miovision-technologies> | Twitter <https://twitter.com/miovision> | Facebook <https://www.facebook.com/miovision>* ------------------------------ Miovision Technologies Inc. | 148 Manitou Drive, Suite 101, Kitchener, ON, Canada | N2C 1L3 This e-mail may contain information that is privileged or confidential. If you are not the intended recipient, please delete the e-mail and any attachments and notify us immediately. On Thu, Jan 23, 2014 at 7:18 PM, Andrew Cathrow <acathrow(a)redhat.com&gt;wrote: > Are we sure that the issue is the guest I/O - what's the raw performance > on the host accessing the gluster storage? > > ------------------------------ > > *From: *"Steve Dainard" <sdainard(a)miovision.com&gt; > *To: *"Itamar Heim" <iheim(a)redhat.com&gt; > *Cc: *"Ronen Hod" <rhod(a)redhat.com&gt;, "users" <users(a)ovirt.org&gt;, "Sanjay > Rao" <srao(a)redhat.com&gt; > *Sent: *Thursday, January 23, 2014 4:56:58 PM > *Subject: *Re: [Users] Extremely poor disk access speeds in Windows guest > > > I have two options, virtio and virtio-scsi. > > I was using virtio, and have also attempted virtio-scsi on another > Windows guest with the same results. > > Using the newest drivers, virtio-win-0.1-74.iso. > > *Steve Dainard * > IT Infrastructure Manager > Miovision <http://miovision.com/> | *Rethink Traffic* > 519-513-2407 ex.250 > 877-646-8476 (toll-free) > > *Blog <http://miovision.com/blog> | **LinkedIn > <https://www.linkedin.com/company/miovision-technologies> | Twitter > <https://twitter.com/miovision> | Facebook > <https://www.facebook.com/miovision>* > ------------------------------ > Miovision Technologies Inc. | 148 Manitou Drive, Suite 101, Kitchener, > ON, Canada | N2C 1L3 > This e-mail may contain information that is privileged or confidential. > If you are not the intended recipient, please delete the e-mail and any > attachments and notify us immediately. > > > On Thu, Jan 23, 2014 at 4:24 PM, Itamar Heim <iheim(a)redhat.com&gt; wrote: > >> On 01/23/2014 07:46 PM, Steve Dainard wrote: >> >>> Backing Storage: Gluster Replica >>> Storage Domain: NFS >>> Ovirt Hosts: CentOS 6.5 >>> Ovirt version: 3.3.2 >>> Network: GigE >>> # of VM's: 3 - two Linux guests are idle, one Windows guest is >>> installing updates. >>> >>> I've installed a Windows 2008 R2 guest with virtio disk, and all the >>> drivers from the latest virtio iso. I've also installed the spice agent >>> drivers. >>> >>> Guest disk access is horribly slow, Resource monitor during Windows >>> updates shows Disk peaking at 1MB/sec (scale never increases) and Disk >>> Queue Length Peaking at 5 and looks to be sitting at that level 99% of >>> the time. 113 updates in Windows has been running solidly for about 2.5 >>> hours and is at 89/113 updates complete. >>> >> >> virtio-block or virtio-scsi? >> which windows guest driver version for that? >> >> >>> I can't say my Linux guests are blisteringly fast, but updating a guest >>> from RHEL 6.3 fresh install to 6.5 took about 25 minutes. >>> >>> If anyone has any ideas, please let me know - I haven't found any tuning >>> docs for Windows guests that could explain this issue. >>> >>> Thanks, >>> >>> >>> *Steve Dainard * >>> >>> >>> >>> _______________________________________________ >>> Users mailing list >>> Users(a)ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users >>> >>> >> > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > > _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users