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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>With zfs you can use sync=disabled to enable async on the storage side as well just fyi.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>On one of ours we have 18 x 2tb drives across 6 x 3-way-mirrors with 3 intel 7310 ssds 3 way mirrored for zil<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>With about 100 vm’s running I get roughly 1400 iops write and 2230 read with about 600MBps read and 220 write running the tests from a windows 2008 r2 vm.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Donny Davis [mailto:donny@cloudspin.me] <br><b>Sent:</b> Sunday, August 02, 2015 05:49 PM<br><b>To:</b> Matthew Lagoe<br><b>Cc:</b> Alan Murrell; users<br><b>Subject:</b> Re: [ovirt-users] Poor guest write speeds<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Thank you for reporting back.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I don't have to use async with my NFS share. Its not the same comparison, but just for metrics I am running an<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> HP dl380 with 2x6cores and 24GB of ram, with 16 disks in raidz2 with 4 vdevs. Backend is ZFS. Connections are 10GBE<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I get great performance from my setup.<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Sat, Aug 1, 2015 at 9:00 PM, Matthew Lagoe <<a href="mailto:matthew.lagoe@subrigo.net" target="_blank">matthew.lagoe@subrigo.net</a>> wrote:<o:p></o:p></p><p class=MsoNormal>You can run without async so long as your nfs server can handle sync writes<br>quickly<o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>-----Original Message-----<br>From: <a href="mailto:users-bounces@ovirt.org">users-bounces@ovirt.org</a> [mailto:<a href="mailto:users-bounces@ovirt.org">users-bounces@ovirt.org</a>] On Behalf Of<br>Alan Murrell<br>Sent: Saturday, August 01, 2015 05:37 PM<br>To: users<br>Subject: Re: [ovirt-users] Poor guest write speeds<br><br>Hi Donny (and everyone else who uses NFS-backed storage)<br><br>You mentioned that you get really good performance in oVirt and I am curious<br>what you use for your NFS options in exportfs? The 'async'<br>option fixed my performance issues, but of course this would not be a<br>recommended option in a production environment, at least unless the NFS<br>server was running with a BBU on the RAID card.<br><br>Just curious. Thanks! :-)<br><br>-Alan<o:p></o:p></p></div></div><div><div><p class=MsoNormal>_______________________________________________<br>Users mailing list<br><a href="mailto:Users@ovirt.org">Users@ovirt.org</a><br><a href="http://lists.ovirt.org/mailman/listinfo/users" target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a><br><br><br>_______________________________________________<br>Users mailing list<br><a href="mailto:Users@ovirt.org">Users@ovirt.org</a><br><a href="http://lists.ovirt.org/mailman/listinfo/users" target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a><o:p></o:p></p></div></div></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Donny Davis<o:p></o:p></p></div></div></div></div></body></html>