On Thu, Mar 21, 2019 at 6:14 AM Strahil <hunter86_bg(a)yahoo.com&gt; wrote: > > Unfortunately, the ideal scheduler really depends on storage configuration. Gluster, ZFS, iSCSI, FC, and NFS don't align on a single "best" configuration (to say nothing of direct LUNs on guests), then there's workload considerations. > > > > The scale team is aiming for a balanced "default" policy rather than one which is best for a specific environment. > > > > That said, I'm optimistic that the results will let us give better recommendations if your workload/storage benefits from a different scheduler > > I completely disagree ! > If you use anything other than noop/none (depending if multiqueue is on), your scheduler inside the VM will reorder and delay your I/O. > Then the I/O will be received by the Host and this repeats again. > I can point to SuSe and Red Hat knowledge base where both vendors highly recommend noop/none as schedulers for VM. > It has nothing in common with the backend - that's in control of the hosts I/O scheduler. > > Can some one tell me under which section should I open a bug ? Bugzilla is not newbie-friendly and I should admit that opening bugs for RHEL/CentOS is far easier. > > The best bug section might be ovirt appliance  - related , as this is only valid for VMs and not bare-metal Engine. Yes, it seems the most appropriate choice; start from here: https://bugzilla.redhat.com/enter_bug.cgi?product=ovirt-appliance thanks   > > Best Regards, > Strahil Nikolov > > _______________________________________________ > Users mailing list -- users(a)ovirt.org > To unsubscribe send an email to users-leave(a)ovirt.org > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ > List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/SNSSDE33P2Y...