On 16/04/2015 03:27, Fam Zheng wrote: > > virtio-scsi, on the other hand, provides more features and means to be more > scalable (you won't need to painfully mess with pci bridges to attach 1000 > disks). > > Anyway, we are working on improving virtio-scsi performance, although it's > theoretically impossible to make it faster or even equally fast. > > Regarding your test, I think with current code base, it generally performs > better if you use io=native. Have you compared that?
Also, make sure you're using the deadline scheduler in both host and guest. Paolo
