On Fri, Feb 10, 2017 at 12:46 PM, Andrea Fagiani <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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