RE: [Xen-users] Xen SAN Questions

[Nathan Stratton <nathan@xxxxxxxxxxxx>]

On Tue, 27 Jan 2009, Tait Clarridge wrote:

> With the DRBD and GFS (in primary/primary mode) setup I was seeing an 
> average of roughly 55MB/s as opposed to ~206MB/s for EXT3 and ~334 MB/s 
> on XFS... (unless my numbers are horribly wrong).
Hmm, what is your DRBD setup? Try the following:

    no-disk-barrier;
    no-disk-flushes;
    no-md-flushes;
    no-disk-drain;

> Which program are you benchmarking I/O with?
dd if=/dev/zero of=/share/test bs=1G count=8

> <>
Nathan Stratton                                CTO, BlinkMind, Inc.
nathan at robotics.net                         nathan at blinkmind.com
http://www.robotics.net                        http://www.blinkmind.com

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