From mboxrd@z Thu Jan 1 00:00:00 1970 From: Asdo Subject: Virtio on infiniband HW expected performance? Date: Fri, 20 Nov 2009 07:52:33 +0100 Message-ID: <4B063CB1.8080008@shiftmail.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from blade3.isti.cnr.it ([194.119.192.19]:53029 "EHLO BLADE3.ISTI.CNR.IT" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754933AbZKTGxU (ORCPT ); Fri, 20 Nov 2009 01:53:20 -0500 Received: from conversionlocal.isti.cnr.it by mx.isti.cnr.it (PMDF V6.4 #31773) id <01NGB3OY0CW08YH5WV@mx.isti.cnr.it> for kvm@vger.kernel.org; Fri, 20 Nov 2009 07:52:26 +0100 Received: from [151.81.2.88] by mx.isti.cnr.it (PMDF V6.4 #31703) with ESMTPSA id <01NGB3OVZL3U9LVI1Z@mx.isti.cnr.it> for kvm@vger.kernel.org; Fri, 20 Nov 2009 07:52:25 +0100 Sender: kvm-owner@vger.kernel.org List-ID: Hi all we are evaluating the purchase of infiniband hardware together with Nehalem-based servers, for KVM use. What performance can we roughly expect with virtio-net over infiniband hardware? Communication would be primarily for these 2 purposes: 1- VM to a HN: primarily NFSv4 imports from the fileserver (a HN) to the VMs, for the files shared by multiple VMs. 2- HN to HN: fileserver serving VM disk-images via NFSv4 to the HN which is running KVM. What performances can I roughly expect in these 2 cases? Also, for evaluating case #2: what is the performance of virtio-blk? Our VMs would be 70% linux, 30% windows. Thank you Asdo