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/Administration_Guide/chap-User_Guide-Monitor_Workload.html *Regards,* *Shani Leviim* On Mon, Nov 20, 2017 at 5:20 PM, Jiří Sléžka <jiri.sle...@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 > >
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