[Beowulf] Opteron/Athlon Clustering
Gerry Creager N5JXS
gerry.creager at tamu.edu
Sat Jun 5 21:47:57 PDT 2004
I've been playing with my Appro 16 node dual Opteron cluster. If you
load a 64 bit OS (say, SuSE in 64 bit mode), it's a 64 bit system,
unless you do some interesting things to make it operaate in 32-bit mode.
If you load a 32-bit kernel and OS it's a 32 bit system. But, why?
Robert G. Brown wrote:
> On Fri, 4 Jun 2004, Jonathan Michael Nowacki wrote:
>> A couple of questions. Is it possible to have a cluster of Athlons and
>>a cluster of Opterons and use them as a whole for 32 bit computing and use
>>the Opterons separately for 64 bit computing? We currently are using 37
>>Athlons running Rocks(Linux) and PBS (Portable Batch Systems), and are
>>currently looking into buying a cluster of Opterons.
> In principle yes, but see the recent list archives for discussion of
> library issues -- you have to install a spanning set of 32 bit libraries
> in addition to the default 64 bit libraries and maybe some more stuff.
> Also, they will likely run code at different speeds, so load balancing a
> job distributed on the two architectures may be tricky, although for
> batch style computing that may not matter.
>>Also, the people I work for are very wary about buying anything from
>>anybody but big name companies like Dell, Compaq/HP, SGI, and IBM. They
>>are worried about total cost of ownership if something breaks. The only
>>problem is none of these companies sells rack-mount Opterons. What is a
>>good company to buy rack-mount (dual and quad) Opterons from?
> Penguin sold me mine; so far they have proven pretty good. I've got
> them all solidly loaded right now. I think that there are a bunch of
> companies, many of them (like penguin) very much linux-centric, that
> sell rackmount dual opterons.
We bought ours from Appro. It's not the first cluster on our campus
from them. Delivery, setup were timely and well-handled. Can't speak
to service yet: Nothing has failed that I'm aware of.
Gerry Creager -- gerry.creager at tamu.edu
Network Engineering -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
Office: 903A Eller Bldg, TAMU, College Station, TX 77843
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