[PVE-User] Short question...

Dmitry Petuhov mityapetuhov at gmail.com
Thu Jul 20 10:32:15 CEST 2017

19.07.2017 22:59, Gilberto Nunes wrote:
> One doubt: is it SCSI better than virtio??
I think you meant virtio-scsi vs virtio-blk. Other virtual SCSI 
controllers are usually worse.
Depends on what do you want from it.

Virtio-scsi is the only interface that supports trim/discard, so it's 
best choice for thin-provisioned storages. Also, it can pass through raw 
SCSI device to guest (in PVE it does [did?] so with libiscsi-backed 
storages), so minimizing virtualisation overhead. But it uses single IO 
thread per controller, so if you want max performance with multiple 
virtual disks, you must select virtio-scsi-single

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