[Beowulf] High quality hardware
hahn at physics.mcmaster.ca
Tue May 25 09:14:52 PDT 2004
> countinuous "lamd" daemoun hangups. But the next day all nodes ran
> almost fine with identical test suites. Moreover, now it's giving very
but do you have monitoring of, for instance, temperature? lack of
repeatability will make your life very difficult.
> -Continuous run 24h a day of common hardware not prepared to.
which generally equates to temperature.
> -Defective mainboard/memory
but what you describe is a degredation, no? that is, it used to work fine,
but now, sometimes intermittently fails?
> -External inteferences/noise
are these systems based on bare boards? or multiple boards per chassis?
> The last argument seemed to gain our attention, in that case what would
> be the best case material for shielding ?
mu-metal, I suppose. but that's rather extreme! are you proposing some
kind of EMF interference *through* the case? or some kind of exotic noise
> Also, what kind of mainboard manufacturers do you trust most ? I'm
I go with "A-list" vendors: recognizable vendors, preferably not entirely
focused on either low-end or gamer markets. asus, tyan, supermicro, msi,
celestica, hp, ibm, apple, dell, etc.
> referring mainly to Socket A platform,
ah. I wonder if that's your problem, then. socket A has always had a rep
for being somewhat fiddly to run stably, and to keep cool. the latter is
presumably just because the chips dissipate a fair amount of power, and need
rather good contact with a rather good heatsink. unlike intel or recent AMD
systems, which have builtin heatspreaders. still, if you have properly
mounted, fan-working, copper heatsinks with good through-case airflow,
I'd think you could expect stable behavior.
> we're currently using Asus and
> MSI but alse Tyan seems a good option.
those work for me. oddly, I'm getting feedback from OEM channels that Tyan
is having trouble stocking/delivering products. that's kind of worrisome,
since I tend to like their products...
regards, mark hahn.
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