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<p>Correct,<br>
coincidentally, there no instances of systemd-udevd going haywire
either.<br>
</p>
<p>Andrea<br>
</p>
<br>
<div class="moz-cite-prefix">On 14/02/2017 15:20, Yaniv Kaul wrote:<br>
</div>
<blockquote
cite="mid:CAJgorsboDgsDRNHgyuYt_xnZcnL9nAh4x73+XMpgECarJk2gFQ@mail.gmail.com"
type="cite">
<div dir="ltr"><br>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Feb 14, 2017 at 2:15 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">
<div bgcolor="#FFFFFF" text="#000000">
<p>Hi,</p>
<p>just a quick update on the issue. The high amount of
IOPS was indeed due to having the hosted-engine on the
EQL storage; we worked around the issue by moving the
hosted-engine to a gluster storage instead.</p>
</div>
</blockquote>
<div><br>
</div>
<div>And now there are no high amount of IOPS on the Gluster
storage?</div>
<div>Y.</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Thanks to everyone involved,<br>
Andrea<br>
</p>
<div>
<div class="h5"> <br>
<div class="m_-7339259678222976733moz-cite-prefix">On
13/02/2017 13:24, Nir Soffer wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_quote">On Mon, Feb 13, 2017
at 12:32 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><wbr>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Hi Nir,</p>
<p>the amount of IOPS is pretty much
constant, attaching the logs from the
last hour or so.</p>
</div>
</blockquote>
<div><br>
</div>
<div>Andrea, can you send also logs from
ovirt-hosted-engine-ha?</div>
<div>(I'm not sure about the name of the
service or the location of the logs)</div>
<div> </div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><span
class="m_-7339259678222976733HOEnZb"><font
color="#888888">
<p>Andrea<br>
</p>
</font></span>
<div>
<div class="m_-7339259678222976733h5">
<br>
<div
class="m_-7339259678222976733m_1481480387959180211moz-cite-prefix">On
13/02/2017 10:13, Nir Soffer
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>
<div class="gmail_extra">
<div class="gmail_quote">On
Mon, Feb 13, 2017 at 11:05
AM, Andrea Fagiani <span
dir="ltr"><<a
moz-do-not-send="true"
href="mailto:andrea.fagiani@immobiliare.it" target="_blank">andrea.fagiani@immobiliare.it</a><wbr>></span>
wrote:<br>
<blockquote
class="gmail_quote"
style="margin:0px 0px
0px
0.8ex;border-left:1px
solid
rgb(204,204,204);padding-left:1ex">Thanks
for the heads up, I'll
take a look at Mark's
thread.<br>
We are presenting 2
storage LUNs to a single
ovirt cluster and yes,
all hosts are hosted
engine hosts.<br>
<br>
Thanks,<br>
Andrea</blockquote>
<div><br>
</div>
<div>I think we already
have hosted engine bug
about doing to many
calls to vdsm</div>
<div>that cause reloads of
lvm data; this can cause
increased io.</div>
<div><br>
</div>
Can you attach vdsm and
hosted engine agent logs
showing the timeframe when
<div>you have lot of iops
on the server?</div>
<div><br>
</div>
<div>Nir<br>
</div>
<div> </div>
<blockquote
class="gmail_quote"
style="margin:0px 0px
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solid
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<div
class="m_-7339259678222976733m_1481480387959180211gmail-HOEnZb">
<div
class="m_-7339259678222976733m_1481480387959180211gmail-h5"><br>
<br>
<br>
On 12/02/2017 18:27,
Andrea Ghelardi
wrote:<br>
<blockquote
class="gmail_quote"
style="margin:0px
0px 0px
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solid
rgb(204,204,204);padding-left:1ex">
Andrea,<br>
I don't want to
point any fingers
but Mark Greenall
faced some issues
with Ovirt
4.06/4.1 linked to
equallogic as
well.<br>
You may want to
search posts in
this ML with
subject " Ovirt
4.0.6 guests 'Not
Responding' " to
see if you find
any similarities.<br>
How many storages
are you presenting
to how many
clusters?<br>
Also, are your
nodes all Hosted
Engine Hosts? In
my old
configuration,
normal hosts read
IOPS ranged from
50 to 500 while HE
ones peaked even
~3000<br>
Cheers<br>
AG<br>
<br>
<br>
-----Original
Message-----<br>
From: Andrea
Fagiani [mailto:<a
moz-do-not-send="true" href="mailto:andrea.fagiani@immobiliare.it"
target="_blank">andrea.fagiani@immobil<wbr>iare.it</a>]<br>
Sent: Friday,
February 10, 2017
5:56 PM<br>
To: Andrea
Ghelardi <<a
moz-do-not-send="true"
href="mailto:a.ghelardi@iontrading.com" target="_blank">a.ghelardi@iontrading.com</a>>;
<a
moz-do-not-send="true"
href="mailto:users@ovirt.org" target="_blank">users@ovirt.org</a><br>
Subject: Re:
[ovirt-users] high
number of IOPS
from ovirt hosts<br>
<br>
Hi Andrea,<br>
<br>
thanks for the
insight; no I
wasn't able to
pinpoint the issue
to a single host,
the load seems to
be evenly spread.<br>
We have another
cluster running
4.0.6 on a
compellent as well
and we haven't
experienced any
similar issues.<br>
<br>
Thanks,<br>
Andrea<br>
<br>
<br>
On 10/02/2017
17:17, Andrea
Ghelardi wrote:<br>
<blockquote
class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
Hello Andrea,<br>
I saw that
happening on my
HE hosts
connected to a
COMPELLENT SC040<br>
when I was
running Ovirt
3.5<br>
<br>
All HE hosts
were hammering
the SAN with
2~4k IOPS each<br>
<br>
Upgrading to
4.0.5 solved my
case.<br>
Are you able to
check if IOPS
are generated
from a
particular host
or rather spread
among all nodes?<br>
<br>
Cheers<br>
AG<br>
<br>
<br>
-----Original
Message-----<br>
From: <a
moz-do-not-send="true"
href="mailto:users-bounces@ovirt.org" target="_blank">users-bounces@ovirt.org</a>
[mailto:<a
moz-do-not-send="true"
href="mailto:users-bounces@ovirt.org" target="_blank">users-bounces@ovirt.or<wbr>g</a>]
On<br>
Behalf Of Andrea
Fagiani<br>
Sent: Friday,
February 10,
2017 12:47 PM<br>
To: <a
moz-do-not-send="true"
href="mailto:users@ovirt.org" target="_blank">users@ovirt.org</a><br>
Subject:
[ovirt-users]
high number of
IOPS from ovirt
hosts<br>
<br>
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>
<br>
Thanks,<br>
Andrea<br>
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