[Gluster-devel] Striping.

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


Chris,
 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.

avati

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?
>
> -------------------------------------------------------------------------------
>
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