Hi Jiri, Sorry for the delay. Do you experience the same issue for non-gluster domains? In order to profile your gluster volume while export is in progress, follow the instructions in this link [1]. (Please execute "gluster volume profile <volname> start " and then "gluster volume profile <volname> info") [1] https://access.redhat.com/documentation/en-US/Red_Hat_Storage/2.1/html/Admin... *Regards,* *Shani Leviim* On Mon, Nov 20, 2017 at 5:20 PM, Jiří Sléžka <jiri.slezka@slu.cz> wrote:
Hi,
I am trying realize why is exporting of vm to export storage on glusterfs such slow.
I am using oVirt and RHV, both instalations on version 4.1.7.
Hosts have dedicated nics for rhevm network - 1gbps, data storage itself is on FC.
GlusterFS cluster lives separate on 4 dedicated hosts. It has slow disks but I can achieve about 200-400mbit throughput in other applications (we are using it for "cold" data, backups mostly).
I am using this glusterfs cluster as backend for export storage. When I am exporting vm I can see only about 60-80mbit throughput.
What could be the bottleneck here?
Could it be qemu-img utility?
vdsm 97739 0.3 0.0 354212 29148 ? S<l 15:43 0:06 /usr/bin/qemu-img convert -p -t none -T none -f raw /rhev/data-center/2ff6d0ee-a10b-473d-b77c-be9149945f5f/ ff3cd56a-1005-4426-8137-8f422c0b47c1/images/ba42cbcc- c068-4df8-af3d-00f2077b1e27/c57acd5f-d6cf-48cc-ad0c-4a7d979c0c1e -O raw /rhev/data-center/mnt/glusterSD/10.20.30.41:_rhv__ export/81094499-a392-4ea2-b081-7c6288fbb636/images/ ba42cbcc-c068-4df8-af3d-00f2077b1e27/c57acd5f-d6cf-48cc-ad0c-4a7d979c0c1e
Any idea how to make it work faster or what throughput should I expected?
Cheers,
Jiri
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users