On 04.08.2010, at 18:46, Anthony Liguori wrote: > On 08/04/2010 11:44 AM, Avi Kivity wrote: >> On 08/04/2010 03:53 PM, Anthony Liguori wrote: >>> >>> So how do we enable support for more than 20 disks? I think a virtio-scsi is inevitable.. >> >> Not only for large numbers of disks, also for JBOD performance. If you have one queue per disk you'll have low queue depths and high interrupt rates. Aggregating many spindles into a single queue is important for reducing overhead. > > Right, the only question is, to you inject your own bus or do you just reuse SCSI. On the surface, it seems like reusing SCSI has a significant number of advantages. For instance, without changing the guest's drivers, we can implement PV cdroms or PC tape drivers. What exactly would keep us from doing that with virtio-blk? I thought that supports scsi commands already. Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
