[ovirt-users] Poor guest write speeds

[Donny Davis]

I was asking because in ovirt you may have had that option turned on, and
in just regular libvirtd/kvm you didn't. It could be making a difference,
but its really hard to tell. It's very strange that you're having write
performance issues. This is one of the reasons I use oVirt. Performance has
always been top notch compared to any other comprehensive solution I have
tried.

Can you give this a try. Fire up a manager thats not hosted engine, maybe a
vm on a laptop or something. And then add that centos install you already
as a node in a datacenter that uses local storage. ... I have a feeling you
might have had some NFS related issues with your write performance. If that
is the case, then NFS tuning will be required to get what you are looking
for.

To be honest this has never been a problem for me in any of my deployments,
so if anyone else out there has something please feel free to chime in.

On Tue, Jul 28, 2015 at 8:19 PM, Alan Murrell <lists at murrell.ca> wrote:

>
>
> On 28/07/15 03:06 PM, Donny Davis wrote:
>
> Are you using virtio-scsi in oVirt?
>
>
> Initially I thought I was, but realised it was just virtio (no '-scsi'),
> though I did have the guest tools installed (as well as having to install
> the virtio drivers to get the Win7 install to see the HDD).  When I
> realised this, I added a second virtual HDD, making sure it was of type
> virtio-scsi and then I formatted it.
>
> I ran the same tests from "Parkdale" on the second HDD, but unfortunately
> with the same results.
>
> I am willing to install oVirt again and try another Win7 VM, making sure
> the first disk is virtio-scsi, if you think that may make a difference?
>
> -Alan
>
>


-- 
Donny Davis
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