Adding Bob Sibley to this thread. ----- Original Message -----
> From: "Steve Dainard" <sdain...@miovision.com> > To: "Andrew Cathrow" <acath...@redhat.com> > Cc: "Ronen Hod" <r...@redhat.com>, "users" <users@ovirt.org>, "Sanjay Rao" > <s...@redhat.com>, "Itamar Heim" <ih...@redhat.com> > Sent: Friday, January 24, 2014 3:01:25 PM > Subject: 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 | Rethink Traffic > 519-513-2407 ex.250 > 877-646-8476 (toll-free) > Blog | LinkedIn | Twitter | Facebook > 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 < acath...@redhat.com > > 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" < sdain...@miovision.com > > > > > > > To: "Itamar Heim" < ih...@redhat.com > > > > > > > Cc: "Ronen Hod" < r...@redhat.com >, "users" < users@ovirt.org >, "Sanjay > > > Rao" < s...@redhat.com > > > > > > > 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 | Rethink Traffic > > > > > > 519-513-2407 ex.250 > > > > > > 877-646-8476 (toll-free) > > > > > > Blog | LinkedIn | Twitter | Facebook > > > > > > 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 < ih...@redhat.com > 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@ovirt.org > > > > > > > > > > > > > > > http://lists.ovirt.org/ mailman/listinfo/users > > > > > > > > > > > > > _______________________________________________ > > > > > > Users mailing list > > > > > > Users@ovirt.org > > > > > > http://lists.ovirt.org/mailman/listinfo/users > > > -- Sanjay Rao Principal Performance Engineer Phone: 978-392-2479 Red Hat, Inc. FAX: 978-392-1001 314 Littleton Road Email: s...@redhat.com Westford, MA 01886
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