Thank you for reporting back.

I don't have to use async with my NFS share. Its not the same comparison, but just for metrics I am running an

HP dl380 with 2x6cores and 24GB of ram, with 16 disks in raidz2 with 4 vdevs. Backend is ZFS. Connections are 10GBE

I get great performance from my setup.

On Sat, Aug 1, 2015 at 9:00 PM, Matthew Lagoe <matthew.lagoe@subrigo.net> wrote:

You can run without async so long as your nfs server can handle sync writes
quickly

-----Original Message-----
From: users-bounces@ovirt.org [mailto:users-bounces@ovirt.org] On Behalf Of
Alan Murrell
Sent: Saturday, August 01, 2015 05:37 PM
To: users
Subject: Re: [ovirt-users] Poor guest write speeds

Hi Donny (and everyone else who uses NFS-backed storage)

You mentioned that you get really good performance in oVirt and I am curious
what you use for your NFS options in exportfs? The 'async'
option fixed my performance issues, but of course this would not be a
recommended option in a production environment, at least unless the NFS
server was running with a BBU on the RAID card.

Just curious. Thanks! :-)

-Alan

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Donny Davis