Re: [ovirt-users] Poor guest write speeds

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. 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. 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. As a baseline, I ran the following modified 'dd' write test on the server itself: dd bs=1M count=4000 if=/dev/zero of=test conv=sync with the following results: 4000+0 records in 4000+0 records out 4194304000 bytes (4.2 GB) copied, 39.349 s, 107 MB/s So now the question becomes, why would I be getting such a huge difference in oVirt? Thanks. -Alan