<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Hi Jiri,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Sorry for the delay.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">Do you experience the same issue for non-gluster domains?</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">In order to profile your gluster volume while export is in
progress, follow the instructions in this link [1].</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">(Please execute "gluster volume profile <volname> start " and then "gluster volume profile <volname> info")</div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;font-size:small">[1] <a href="https://access.redhat.com/documentation/en-US/Red_Hat_Storage/2.1/html/Administration_Guide/chap-User_Guide-Monitor_Workload.html">https://access.redhat.com/documentation/en-US/Red_Hat_Storage/2.1/html/Administration_Guide/chap-User_Guide-Monitor_Workload.html</a><br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><span style="font-family:tahoma,sans-serif"><b>Regards,<br></b></span></div><span style="font-family:tahoma,sans-serif"><b>Shani Leviim<br></b></span></div></div></div></div></div>
<br><div class="gmail_quote">On Mon, Nov 20, 2017 at 5:20 PM, Jiří Sléžka <span dir="ltr"><<a href="mailto:jiri.slezka@slu.cz" target="_blank">jiri.slezka@slu.cz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I am trying realize why is exporting of vm to export storage on<br>
glusterfs such slow.<br>
<br>
I am using oVirt and RHV, both instalations on version 4.1.7.<br>
<br>
Hosts have dedicated nics for rhevm network - 1gbps, data storage itself<br>
is on FC.<br>
<br>
GlusterFS cluster lives separate on 4 dedicated hosts. It has slow disks<br>
but I can achieve about 200-400mbit throughput in other applications (we<br>
are using it for "cold" data, backups mostly).<br>
<br>
I am using this glusterfs cluster as backend for export storage. When I<br>
am exporting vm I can see only about 60-80mbit throughput.<br>
<br>
What could be the bottleneck here?<br>
<br>
Could it be qemu-img utility?<br>
<br>
vdsm 97739 0.3 0.0 354212 29148 ? S<l 15:43 0:06<br>
/usr/bin/qemu-img convert -p -t none -T none -f raw<br>
/rhev/data-center/2ff6d0ee-<wbr>a10b-473d-b77c-be9149945f5f/<wbr>ff3cd56a-1005-4426-8137-<wbr>8f422c0b47c1/images/ba42cbcc-<wbr>c068-4df8-af3d-00f2077b1e27/<wbr>c57acd5f-d6cf-48cc-ad0c-<wbr>4a7d979c0c1e<br>
-O raw<br>
/rhev/data-center/mnt/<wbr>glusterSD/10.20.30.41:_rhv__<wbr>export/81094499-a392-4ea2-<wbr>b081-7c6288fbb636/images/<wbr>ba42cbcc-c068-4df8-af3d-<wbr>00f2077b1e27/c57acd5f-d6cf-<wbr>48cc-ad0c-4a7d979c0c1e<br>
<br>
Any idea how to make it work faster or what throughput should I expected?<br>
<br>
Cheers,<br>
<br>
Jiri<br>
<br>
<br>
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<br></blockquote></div><br></div>