[Gluster-devel] Striping.

Anand Avati avati at zresearch.com
Thu Nov 29 18:13:24 UTC 2007

 you will see the help of stripe when you perform IO where disk head is the
bottleneck. For example try to dd a file > 2x RAM size. Then dd with stripe.
you will note that the 'rock bottom throughput' is lifted higher with
stripe. It also helps when one file is accessed by a LOT of clients so that
one machine's IO does not become a bottleneck.


2007/11/29, Chris Johnson <johnson at nmr.mgh.harvard.edu>:
>       Hi again,
>       So I did my dd read test of my 24MB file on a simple two brick
> stripe.  Nothing fancy.  Two bricks and the stripe define on the server
> side.  Client side mounts the remote stripe.  Default block size,
> 128KB.
>       No difference between that and my single brick test as far as
> time goes.  What's striping supposed to get me?  I thought it was
> drives heads.  Or am I missing something again?
> -------------------------------------------------------------------------------
> Chris Johnson               |Internet: johnson at nmr.mgh.harvard.edu
> Systems Administrator       |Web:      http://www.nmr.mgh.harvard.edu/~johnson
> <http://www.nmr.mgh.harvard.edu/%7Ejohnson>
> NMR Center                  |Voice:    617.726.0949
> Mass. General Hospital      |FAX:      617.726.7422
> 149 (2301) 13th Street      |Survival, all by it self, isn't worth it.
> Charlestown, MA., 02129 USA |                 Me
> -------------------------------------------------------------------------------
> _______________________________________________
> Gluster-devel mailing list
> Gluster-devel at nongnu.org
> http://lists.nongnu.org/mailman/listinfo/gluster-devel

It always takes longer than you expect, even when you take into account
Hofstadter's Law.

-- Hofstadter's Law

More information about the Gluster-devel mailing list