[Beowulf] ECC

Douglas Eadline deadline at eadline.org
Mon Nov 5 08:50:09 PST 2012


--snip--

>>
>>More interesting is the ECC discussion.
>>
>>ECC is simply a requirement IMHO, not a 'luxury thing' as some
>>hardware engineers see it.
>
> Depends on your computational model.  Would you rather spend money on ECC
> or on more processors?
> ECC comes at a cost in speed as well.  There is some non-zero time
> required to compute the syndrome bits and do the correction on the read.
> Sure, you can pipeline it, but there's some extra latency inevitably
> added.
>

I find it interesting that many users thought GPU's could not be
a research tool unless they had ECC memory. I have one associate who
turns it off because they get 10% better performance on their
Amber runs.

--
Doug



-- 
Doug

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