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From Stefano Mazzocchi <stef...@apache.org>
Subject Re: [RT] Adaptive Caching
Date Tue, 29 Jul 2003 15:39:28 GMT

On Tuesday, Jul 29, 2003, at 16:58 Europe/Rome, Hunsberger, Peter wrote:

> Stefano Mazzocchi <stefano@apache.org> asks:
>
>>> If you do the Google search you'll notice the references to
>> randomized
>>> paging algorithms.   I didn't chase these very far other than to
>>> determine that at least one author shows that they can
>> perform as good
>>> as conventional algorithms but not as good as the theoretical best.
>>
>> I still don't understand why you consider my approach randomized
>> because, IMO, using a random function to simulate (inferentially
>> updated) probability of behavior is not equivalent to a
>> random behavior.
>
> Ahhh, semantics, I agree.  The behavior isn't random, what I was trying
> to say: the difference in behaviors is the difference between
> deterministic and randomized functions.  Randomized functions are a 
> good
> tool for attacking NP hard problems (which paging in general is, and
> cache management is just an extension of the paging problem) since they
> can often get very close to the best answer without huge computational
> loads. I think we more or less agree that at this point the
> deterministic functions aren't going to be discovered any time soon?

Oh, totally.

--
Stefano.


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