Last week's "Windows Server 2003 better than Linux" test

[jra at dp.samba.org]

On Mon, May 12, 2003 at 12:49:14PM -0400, David Collier-Brown -- Customer Engineering wrote:
>    Ironically, I happened to be working on Samba read performance
> just before the Veritest test of Red Hat AS 2.1 and Samba 2.2.7
> 
>    I notice that the write cache size wasn't set in Samba:
> am I right in thinking that this **alone** should allow
> a write speed improvement proportional to the stripe
> width?
>    My measurement on a different but parallel configuration
> shows a roughly tenfold speed difference for a 3-wide stripe
> (admittedly on quite a fast set of disks!)

Hmmm. To be honest I think this is due to the Solaris UFS 
behavour - it seems to be very sensitive to write sizes
(that's why I added the write cache code). Linux doesn't
seem to need this as the kernel does the buffering.

Jeremy.