3:11 a.m.
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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(a)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
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<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(a)immobiliare.it</a>&gt;</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>
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</blockquote>
</div>
<br>
</div>
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