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-bounces@ovirt.org [mailto:users-bounces@ovirt.org] On Behalf Of Andrea Fagiani Sent: Friday, February 10, 2017 12:47 PM To: 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 _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users