[Beowulf] Linux Magazine - What He Said

Peter St. John peter.st.john at gmail.com
Thu Oct 2 14:06:55 EDT 2008


John,
When I tried to ressurect my thing a couple years ago, I realized my
original code was all wrong in trading time for space (plenty of time on the
386, then SunOS servers; not enough space, but new machine had plenty of
unused RAM). I thought some about redesigning to reverse the trade-off,
which would be helpful, but I'm sure it would not just be easier, but more
effective, to run it on a cluster (many nodes, not much ram per node needed,
and any nonzero amount of communication sufficient, but more can be
usefull).
Peter

On 10/2/08, John Hearns <hearnsj at googlemail.com> wrote:
>
>
>
> 2008/10/2 Peter St. John <peter.st.john at gmail.com>
>
>> John,
>> After I first thought up my nutty GA scheme, I was then astonished by the
>> John Holland Scientific American artifcle. I was aghast that anyone could
>> even imagine thinking along those lines with 1960's hardware, as he had
>> done.
>>
>> I believe I read the same article.
> In fact, the first algorithm I tried was simulated annealing (I know this
> does not equal a GA). It swapped so horrendously that I was discouraged, and
> the thing took all night to run even for a simple 2D case (I was working on
> radiation therapy planning).
> I guess I should have been smarter and worked out how to do it within the
> constraints of RAM that I had.
>
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