<div dir="ltr">Hello,<div><br></div><div>i'm trying to convert my physical web servers to a virtual guest. What i'm experiencing is a poor disk i/o, compared to the physical counterpart (having strace telling me that each write takes approximately 100 times the time needed on physical).</div>
<div><br></div><div>Tested hardware is pretty good (HP Proliant 360p Gen8 with 2xSAS 15k rpm 48 Gb Ram).</div><div><br></div><div>The hypervisor part is a minimal Centos 6.5 with libvirt.</div><div>The guest is configured using: VirtIO as disk bus, qcow2 storage format (thick allocation), cache mode: none (needed for for live migration - this could be changed if is the bottleneck), IO mode: default.</div>
<div><br></div><div>Is someone willing to give me some adivices? :)</div><div><br></div><div>Thanks</div><div>
<br></div><div>Luca</div></div>