On Wednesday 29 April 2009, Christian Borntraeger wrote: > Am Wednesday 29 April 2009 13:11:19 schrieb Paul Brook: > > On Wednesday 29 April 2009, Christoph Hellwig wrote: > > > On Tue, Apr 28, 2009 at 11:37:01AM -0500, Anthony Liguori wrote: > > > > Ah, excellent. I think that's a great thing to do. So do you think > > > > virtio-scsi would deprecate virtio-blk? > > > > > > I don't think so. If you have an image format or a non-scsi > > > blockdevice underneath virtio-block avoids the encoding into SCSI CDBs > > > and back and should be faster. > > > > Is this actually measurably faster, or just infinitesimally faster in > > theory? > > If the underlying backing is 4k block size and the emulated scsi disk has > 512 byte block size, write performance can be a lot slower. Rubbish. If this is really a problem you can just use a scsi disk with 4k sectors. Paul -- 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
