For those of us who have more old boards and CPUs laying about, what are the
chances of a distributed computing application?
> Date: Mon, 26 Jul 2010 19:11:54 +0200
> From: sascha.kriss...@web.de
> To: a51@lists.reflextor.com
> Subject: Re: [A51] NVIDIA Tesla C1060 GPGPU
>
> On Mon, Jul 26, 2010 at 06:00:54PM +0100, Cal Leeming [Simplicity Media Ltd]
> wrote:
> > This might be a silly question but..
> >
> > If there was a miscalculation due to hardware, would you be able to detect
> > such an occurrence, and re-process that calc again?
> >
>
> There is no obvious way to add some form of checksumming to the algorithm.
> The next best thing would be to compute every chain twice. Which is what
> i do during testing (and also with 2 different algos, one on the GPU and
> a reference on the CPU) and would be feasible if you cared for correctness.
> But then again even with a 1% error rate you would not do this for the
> rainbow tables, because the incorrect chains cannot lead to incorrect
> results and would only waste some space and some time during lookup when
> the lookup code works with them until they turn out not to produce
> a result. Then you would produce 1.01% more chains and live happily ever
> after.
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