On 03/28/17 14:21, Patrick O'Callaghan wrote: > On Tue, 2017-03-28 at 11:47 +0200, Laszlo Ersek wrote: >> I recommend the following setup: >> >> - hard disk(s): virtio-blk or virtio-scsi disk, as you prefer > > I'm interested in why someone would prefer one over the other. Can you > explain?
I prefer virtio-scsi because it supports thin provisioning (UNMAP scsi operation); it lets me conserve space in host filesystems that support discard (such as ext4 or xfs, for example -- there may be more). Given the right configuration, if you delete files in your Windows 8 or Windows 10 VM, the space is eventually released on the host filesystem. With virtio-blk, the software stack is less featureful and thereby thinner, which is said by some to lead to better performance. Also, as far as I know, dataplane is only available for virtio-blk at the moment, it is in progress for virtio-scsi. (I could be out of date on that though.) YMMV. Laszlo _______________________________________________ vfio-users mailing list [email protected] https://www.redhat.com/mailman/listinfo/vfio-users
