Andrei, You could try pNFS. It allows to access a data on a local storage directly bypassing NFS and even FS level. Unfortunately, it requires SCSI Persistent Reservation feature so would not work all RAID controllers.
From: <users-boun...@ovirt.org> on behalf of Yaniv Kaul <yk...@redhat.com> Date: Monday, 26 February 2018 at 14:49 To: Andrei Verovski <andre...@starlett.lv> Cc: Ovirt Users <email@example.com> Subject: Re: [ovirt-users] Q: VM disk speed penalty NFS vs Local data center storage On Mon, Feb 26, 2018 at 1:30 PM, Andrei Verovski <andre...@starlett.lv<mailto:andre...@starlett.lv>> wrote: Hi, Since oVirt doesn’t support more then 1 host in data center with local storage domain as described here: http://lists.ovirt.org/pipermail/users/2018-January/086118.html I have to setup NFS server on node with VMs (on same node) access via NFS. 10 GB shared storage is in the future plans yet right now have only 2 nodes with local RAID on each. Q: What is VM disk speed penalty (approx %) NFS vs Local RAID in oVirt data center storage? Currently I have 2 VMs running our accounting/inventory control system which are critical to storage performance limits. 2 other VMs have very low disk activity. I don't know, but please remember there's both latency and throughput, both of which are somewhat affected. Throughput will benefit from jumbo frames, for example. Unfortunately it may affect latency a bit. There was an interesting patch that if the NFS was local, bypassed the NFS. It was never completed and merged. Lastly, chapter 6 at hyper-converged guide (should be available in few hours) might be an interesting idea for you to consider - a single Gluster that can later expand. Y.  https://gerrit.ovirt.org/#/c/68822/  https://ovirt.org/documentation/gluster-hyperconverged/Gluster_Hyperconverged_Guide/ Thanks in advance Andrei Verovski _______________________________________________ Users mailing list Users@ovirt.org<mailto:Users@ovirt.org> http://lists.ovirt.org/mailman/listinfo/users
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