Il 15/03/2012 12:47, Stefan Hajnoczi ha scritto: > What is the V2V strategy? > > Supporting these devices is fine if we have a way to convert guests to > use virtio. But if the plan is to keep the guests on VMware pv > devices, then that will split the development effort on support and > optimizing I/O devices. All the performance work going into > virtio-net (vhost-net), virtio-blk, and possibly virtio-scsi isn't > easy to duplicate for VMware pv devices. Also, we cannot extend > VMware devices easily while retaining compatibility.
virtio-scsi and vmware-pvscsi should be equivalent in terms of performance. Of course vhost-scsi would be another story. I think supporting these devices is good anyway as long as they are expected to perform decently but not necessarily as well as virtio. After all we do support both vmware-vga and qxl. > I'm for supporting these devices, but we really need another step to > move migrated guests onto virtio - otherwise users will be > disappointed with KVM's support/performance. Can you explain a bit > how you want these devices to be used? I'm curious about this too. Paolo
