From: Paolo Bonzini <pbonzini@redhat.com>
To: Fam Zheng <famz@redhat.com>, Konstantin Krotov <kkv@clodo.ru>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] virtio-blk and virtio-scsi performance comparison
Date: Thu, 16 Apr 2015 10:04:18 +0200 [thread overview]
Message-ID: <552F6D02.4080309@redhat.com> (raw)
In-Reply-To: <20150416012735.GB21291@ad.nay.redhat.com>
On 16/04/2015 03:27, Fam Zheng wrote:
>
> virtio-scsi, on the other hand, provides more features and means to be more
> scalable (you won't need to painfully mess with pci bridges to attach 1000
> disks).
>
> Anyway, we are working on improving virtio-scsi performance, although it's
> theoretically impossible to make it faster or even equally fast.
>
> Regarding your test, I think with current code base, it generally performs
> better if you use io=native. Have you compared that?
Also, make sure you're using the deadline scheduler in both host and guest.
Paolo
next prev parent reply other threads:[~2015-04-16 8:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-15 8:17 [Qemu-devel] virtio-blk and virtio-scsi performance comparison Konstantin Krotov
2015-04-16 1:27 ` Fam Zheng
2015-04-16 8:04 ` Paolo Bonzini [this message]
2015-04-16 11:17 ` Konstantin Krotov
2015-04-16 11:57 ` Paolo Bonzini
2015-04-21 9:53 ` Konstantin Krotov
2015-04-21 9:57 ` Paolo Bonzini
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