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Re: [Linux-cluster] gfs performance



On Mon, 30 Jan 2006 07:12:51 -0600
Eric Anderson <anderson centtech com> wrote:

> I'm not sure what kind of disk backend you have, but you are probably 
> thrashing the heads on the disks, making the disks do a lot of seeks, 
> burning your performance.  I don't think this is a GFS performance issue 
> really.  You could try a memory backed disk with GFS on it, and see if 
> the performance falls at all.
> 
I wrote that down under comments:
"Shared storage is IBM DS4100, configured with two raid5 volumes of 7 disks each"

It's true that DS4100 is no high performer, but I'd say all that write cache should make a difference with seeks?

Also, does anyone have any numbers to compare?


-- 

Jure Pečar
http://jure.pecar.org


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