RE: [nova] iothread support with Libvirt

Out of curiosity, how are you passing the local storage to the VM? I would also assume a performance hit when using a VM but local storage (instead of Ceph, iscsi, nfs) should still perform well?

We're using and LVM logical volume on 4 x Micron 9300's in a RAID 0 configuration using md. We're using the standard Nova "image_type=lvm" option. The performance is good, relative to something as slow as Ceph, but the performance hit is pretty significant compared to the host's performance. It is essentially IOPS limited. I can run some tests and provide results if you were interested. Eric