This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


[Xen-devel] Xen cluster n/w performance (again!)

To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] Xen cluster n/w performance (again!)
From: Diwaker Gupta <diwakergupta@xxxxxxxxx>
Date: Sat, 20 Nov 2004 22:37:18 -0800
Delivery-date: Sun, 21 Nov 2004 07:41:32 +0000
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding; b=f67Yo6GHovChAVELu2F24agqiHUlWy3uqWatMfjBaaEtH/YXfWk7h9DmoibxEMj/tkiVpHQusNCer6UMzFA1dDxbZEQS7N8silUI4yM54GRrPwVM9TzhZyGqAKr21FUODmBTvpqUE/QfIXkwXsT22zV3k9BxRzoRFqe4OZBovvQ=
Envelope-to: xen+James.Bulpin@xxxxxxxxxxxx
List-archive: <http://sourceforge.net/mailarchive/forum.php?forum=xen-devel>
List-help: <mailto:xen-devel-request@lists.sourceforge.net?subject=help>
List-id: List for Xen developers <xen-devel.lists.sourceforge.net>
List-post: <mailto:xen-devel@lists.sourceforge.net>
List-subscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=subscribe>
List-unsubscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=unsubscribe>
Reply-to: Diwaker Gupta <diwakergupta@xxxxxxxxx>
Sender: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx
Hey everyone,

A few weeks back there was some discussion on Xen's I/O performance in
clusters on the list. I did some experiments today myself using iperf
(not ttcp):

o Xen dom0 talking to another machine in the cluster running native
linux: b/w around 904Mbps, thats nice :)

o Xen VM (running on the same machine as the dom0 in the previous
experiment) talking to another machine running native linux (again,
same as in previous experiment) only achieves 128 Mbps

I read on the list that you folks at Cambridge got upto 800+ Mbps
across VMs? Did you guys do any special optimizations or set any
special parameters? I read something about socket buffer size?

Diwaker Gupta

This SF.Net email is sponsored by: InterSystems CACHE
FREE OODBMS DOWNLOAD - A multidimensional database that combines
robust object and relational technologies, making it a perfect match
for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8
Xen-devel mailing list