Re: [Xen-users] Xen Disk I/O performance vs native performance

["Tim McCarthy" <tmacmd@xxxxxxxxx>]

See prior posts from me on this subject.
I list some sysctl.conf items that greatly improve performance. 

Stock rhel51(2.6.18-53.1.4) kernel from rhn and the simplest of tests:

Dd if=/dev/zero of=./test bs=32768 count=32768


Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: Stefan de Konink <skinkie@xxxxxxxxx>

Date: Fri, 25 Jan 2008 22:36:26 
To:tmac <tmacmd@xxxxxxxxx>
Cc:Sami Dalouche <skoobi@xxxxxxx>,       Christophe Clapp 
<christophe.clapp@xxxxxxxxx>,       Mark Williamson 
<mark.williamson@xxxxxxxxxxxx>,       xen-users@xxxxxxxxxxxxxxxxxxx,       
Florent Valdelièvre<Florent.Valdelievre@xxxxxxxxxx>
Subject: Re: [Xen-users] Xen Disk I/O performance vs native performance


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tmac schreef:
> For kicks, Try using NFS. I am able to get 100MB/sec from two DomUs at
> the same time.
> (I do not care about Dom0 as it really does nothing.) My DomU's are Sun
> Grid Engine clients
> and move really fast.

Did you try files that were bigger than your host memory over NFS with
bonnie++ for example? This ment full system crash for me.


http://xen.bot.nu/benchmarks/

Some of our benchmarks.


Stefan
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