<p dir="ltr">Are you using virtio-scsi in oVirt?</p>
<div class="gmail_quote">On Jul 28, 2015 1:50 PM, "Alan Murrell" <<a href="mailto:lists@murrell.ca">lists@murrell.ca</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">For my latest test, I installed CentOS7 on my server and then installed the libvirt/KVM virtualization group. I created a Win7 guest VM giving it 2GB RAM, 1 vCPU, and 60GB HDD. I did not specify anything for the HDD type; just whatever the default is for libvirt.<br>
<br>
The install of Win7 went *way* faster than any bare metal install I have ever done of Win7, and also faster than the ESXi install I had done earlier.<br>
<br>
Once installed, I downloaded the same "Parkdale" HDD testing application I have been using, and used the same settings. The write test results were about 100 MByte/s. I ran the test several times, including rebooting between tests, and the results came back consistent.<br>
<br>
As a baseline, I ran the following modified 'dd' write test on the server itself:<br>
<br>
dd bs=1M count=4000 if=/dev/zero of=test conv=sync<br>
<br>
with the following results:<br>
<br>
4000+0 records in<br>
4000+0 records out<br>
<a href="tel:4194304000" value="+14194304000" target="_blank">4194304000</a> bytes (4.2 GB) copied, 39.349 s, 107 MB/s<br>
<br>
So now the question becomes, why would I be getting such a huge difference in oVirt?<br>
<br>
Thanks.<br>
<br>
-Alan<br>
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</blockquote></div>