Hi,
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.
Thanks to everyone involved,
Andrea
On 13/02/2017 13:24, Nir Soffer wrote:
On Mon, Feb 13, 2017 at 12:32 PM, Andrea Fagiani
<andrea.fagi...@immobiliare.it <mailto:andrea.fagi...@immobiliare.it>>
wrote:
Hi Nir,
the amount of IOPS is pretty much constant, attaching the logs
from the last hour or so.
Andrea, can you send also logs from ovirt-hosted-engine-ha?
(I'm not sure about the name of the service or the location of the logs)
Andrea
On 13/02/2017 10:13, Nir Soffer wrote:
On Mon, Feb 13, 2017 at 11:05 AM, Andrea Fagiani
<andrea.fagi...@immobiliare.it
<mailto:andrea.fagi...@immobiliare.it>> wrote:
Thanks for the heads up, I'll take a look at Mark's thread.
We are presenting 2 storage LUNs to a single ovirt cluster
and yes, all hosts are hosted engine hosts.
Thanks,
Andrea
I think we already have hosted engine bug about doing to many
calls to vdsm
that cause reloads of lvm data; this can cause increased io.
Can you attach vdsm and hosted engine agent logs showing the
timeframe when
you have lot of iops on the server?
Nir
On 12/02/2017 18:27, Andrea Ghelardi wrote:
Andrea,
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.
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.
How many storages are you presenting to how many clusters?
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
Cheers
AG
-----Original Message-----
From: Andrea Fagiani
[mailto:andrea.fagi...@immobiliare.it
<mailto:andrea.fagi...@immobiliare.it>]
Sent: Friday, February 10, 2017 5:56 PM
To: Andrea Ghelardi <a.ghela...@iontrading.com
<mailto:a.ghela...@iontrading.com>>; users@ovirt.org
<mailto:users@ovirt.org>
Subject: Re: [ovirt-users] high number of IOPS from ovirt
hosts
Hi Andrea,
thanks for the insight; no I wasn't able to pinpoint the
issue to a single host, the load seems to be evenly spread.
We have another cluster running 4.0.6 on a compellent as
well and we haven't experienced any similar issues.
Thanks,
Andrea
On 10/02/2017 17:17, Andrea Ghelardi wrote:
Hello Andrea,
I saw that happening on my HE hosts connected to a
COMPELLENT SC040
when I was running Ovirt 3.5
All HE hosts were hammering the SAN with 2~4k IOPS each
Upgrading to 4.0.5 solved my case.
Are you able to check if IOPS are generated from a
particular host or rather spread among all nodes?
Cheers
AG
-----Original Message-----
From: users-boun...@ovirt.org
<mailto:users-boun...@ovirt.org>
[mailto:users-boun...@ovirt.org
<mailto:users-boun...@ovirt.org>] On
Behalf Of Andrea Fagiani
Sent: Friday, February 10, 2017 12:47 PM
To: users@ovirt.org <mailto:users@ovirt.org>
Subject: [ovirt-users] high number of IOPS from ovirt
hosts
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.
Thanks,
Andrea
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