This is a multi-part message in MIME format. --------------432CF2AF75540A06C0552C48 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi Simone, we are exposing 2x 5TB LUNs, used solely by the ovirt cluster. Thanks Andrea On 12/02/2017 20:21, Simone Tiraboschi wrote:
On Fri, Feb 10, 2017 at 12:46 PM, Andrea Fagiani <andrea.fagiani@immobiliare.it <mailto:andrea.fagiani@immobiliare.it>> wrote:
Hi,
We've got a 8-host cluster running oVirt 4.1; each host is connected via iscsi to a EQL 4100 storage (2x). Most of the VMs use barely any IOPS, however on our storage controller we've noticed a constant steam of reads, about 2000 IOPS; any idea what might cause the ovirt hosts to hammer on the storage so much?
Looking at iotop, it seems that systemd-udevd is being activated every few seconds (and its IO% is usually fairly high) so I assume this might be somehow related.
mmmh this could be an hint: how many LUNs are you exposing on the iSCSI portal used for the hosted-engine LUN?
Thanks, Andrea _______________________________________________ Users mailing list Users@ovirt.org <mailto:Users@ovirt.org> http://lists.ovirt.org/mailman/listinfo/users <http://lists.ovirt.org/mailman/listinfo/users>
--------------432CF2AF75540A06C0552C48 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit <html> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <p>Hi Simone,<br> we are exposing 2x 5TB LUNs, used solely by the ovirt cluster.<br> </p> Thanks<br> Andrea<br> <br> <div class="moz-cite-prefix">On 12/02/2017 20:21, Simone Tiraboschi wrote:<br> </div> <blockquote cite="mid:CAN8-ONo1fUe0kqf4u66yVUa5KqC0E-OpY6WvyfrsvYfZ4__YRg@mail.gmail.com" type="cite"> <div dir="ltr"><br> <div class="gmail_extra"><br> <div class="gmail_quote">On Fri, Feb 10, 2017 at 12:46 PM, Andrea Fagiani <span dir="ltr"><<a moz-do-not-send="true" href="mailto:andrea.fagiani@immobiliare.it" target="_blank">andrea.fagiani@immobiliare.it</a>></span> wrote:<br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br> <br> We've got a 8-host cluster running oVirt 4.1; each host is connected via iscsi to a EQL 4100 storage (2x).<br> Most of the VMs use barely any IOPS, however on our storage controller we've noticed a constant steam of reads, about 2000 IOPS; any idea what might cause the ovirt hosts to hammer on the storage so much?<br> <br> Looking at iotop, it seems that systemd-udevd is being activated every few seconds (and its IO% is usually fairly high) so I assume this might be somehow related.<br> </blockquote> <div><br> </div> <div>mmmh this could be an hint: how many LUNs are you exposing on the iSCSI portal used for the hosted-engine LUN?</div> <div> </div> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <br> Thanks,<br> Andrea<br> ______________________________<wbr>_________________<br> Users mailing list<br> <a moz-do-not-send="true" href="mailto:Users@ovirt.org" target="_blank">Users@ovirt.org</a><br> <a moz-do-not-send="true" href="http://lists.ovirt.org/mailman/listinfo/users" rel="noreferrer" target="_blank">http://lists.ovirt.org/mailman<wbr>/listinfo/users</a><br> </blockquote> </div> <br> </div> </div> </blockquote> <br> </body> </html> --------------432CF2AF75540A06C0552C48--