[ovirt-users] high number of IOPS from ovirt hosts

[Andrea Fagiani]

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 at immobiliare.it <mailto:andrea.fagiani at 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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