[PVE-User] Short question...

[Gilberto Nunes]

Thanks Dmitry
That the answer I would like to hear, because I always knew that Virtio Bus
is high perfomance.
Now, after read the Manual, I realize that virtio are deprecated...
But after your explanation, I will use only SCSI

Thanks a lot





2017-07-20 5:32 GMT-03:00 Dmitry Petuhov <mityapetuhov at gmail.com>:

> 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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