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

jra at jra at
Mon May 12 17:23:03 GMT 2003

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.


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