[Bioclusters] 3ware 7850 RAID 5 performance

[William Harman]

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Simon;

If you are using NSF, your tested numbers are about right.  If you use
the priority s/w from the vendors like, RAIDZone or Blue Arc you can get
better performance.  Blue Arc will take you to about 120 Mb/s, I
believe, but the cost is very high.

If you need a very high speed access, we expect to introduce a high
performance storage solution at Super Computing 2002 in Nov.  I have
seen demonstrated transfer rates between 250 - 300 Mega bytes per
second.  We are using Red Hat distribution of Linux.  We are not ready
to make this information available to the general public just yet, as
the final product is not yet fully developed, so I would ask you not to
put this information on any boards.

Thanks

Bill Harman,
Director, High Performance Cluster Systems
800-876-8649 Ext 8828
william.harman@ebizmart.com
www.ebizenterprises.com/hpc
 
 


-----Original Message-----
From: bioclusters-admin@bioinformatics.org
[mailto:bioclusters-admin@bioinformatics.org] On Behalf Of Vsevolod
Ilyushchenko
Sent: Monday, August 26, 2002 5:03 PM
To: bioclusters@bioinformatics.org
Subject: [Bioclusters] 3ware 7850 RAID 5 performance


Hi,

Is anyone using a 3ware 7850 hardware RAID card set to RAID 5? 
According, to the docs, it's using something called "accelerated RAID 5"

which should give read *and write* speeds in excess of 100 Mb/s. Several

tests on a dual Linux P3 1.26 Ghz box with ext3 indicate much lower 
speeds: 47 Mb/s sequential read and 12 (twelve!) Mb/s sequential write. 
There are 5 drives in the RAID 5 configuration.

Has anyone benchmarked this card under Linux? What numbers are people 
seeing? Can anyone suggest parameters to tune?

Thanks,
Simon

-- 
Simon (Vsevolod ILyushchenko)   simonf@cshl.edu
http://www.simonf.com          simonf@simonf.com

Even computers need analysts these days!
				("Spider-Man")

_______________________________________________
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https://bioinformatics.org/mailman/listinfo/bioclusters

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