On Wed, 26 Jul 2006, Martin Maechler wrote:
> >>>>> "Sean" == Sean Davis <[EMAIL PROTECTED]>
> >>>>> on Tue, 25 Jul 2006 17:16:02 -0400 writes:
>
> Sean> Can anyone share experience with opteron versus the
> Sean> xeon (woodcrest) for R under linux? I am looking at
> Sean> using 16-32Gb of ram in a workstation (as opposed to a
> Sean> server).
>
> Hmm, not that I'd be an expert...
> If you want to use so much RAM you want to use a 64-bit
> architecture and software (OS, libraries, compilers,...), right?
> AFAIK, that's been known to work well with Opterons and different
> flavors of Linuxen (e.g. we have dual
> Opterons, one with Redhat Enterprise and two with Ubuntu 6.06).
>
> Now I read that there are 64-bit Xeons with "EMT64" (which is
> said to be Intel's emulation of AMD64), so in principle the same
> versions of Linux and R should run there as well.
> Since I haven't heard of any success stories
> I'm interested as well, in reports from R users.
There have been several posted here or R-devel. Things do change, but
every time we have had a formal test, Opterons were considerably better
than Xeons on performance/£.
[BTW, I don't think you will get a workstation motherboard that takes 32Gb
of RAM (although things change fast): my own machine has a server
motherboard in a small tower case.]
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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