I've optimized my disk access to the point where I'm mostly CPU limited now, even when using a standard hard disk instead of an SSD. I can now create trees of
up to about 30 billion nodes, which would take about a week. The simulation rate is continuously going down because so much time is spent in UCT loops in the
huge tree.
Don Dailey wrote:
On Mon, Jun 1, 2009 at 11:22 AM, Isaac Deutsch <i...@gmx.ch
<mailto:i...@gmx.ch>> wrote:
> Well, I'll take that over crashing with an out-of-memory error. :)
Still, pruning seems better to me and has the same effect. ;p
But is it better? I think it's not so obvious without thorough testing.
Pruning throw away information that is lost forever and may need to be
recalculated. Requiring more simulations does not throw out results,
but results in some inefficiencies. So it's not clear to me which is
better - it may even be that it depends on how much you push it. I am
just guessing but I would guess that pruning is better in the short
term, worse in the longer term. Imagine a search at a corespondence
level, where the computer thinks for 24 hours. Which method is best
there?
Could you use hard disk or SSD? Using some kind of caching system,
where you relegate the oldest unvisited nodes to the hard dirve. It
may be that nodes you might normally prune are unlikely to get used
again but if they do you still have the data. This is no good unless
you can guarantee that the disk is used very infrequently - but with SSD
it may be more practical.
- Don
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