[Twisted-Python] pb.cacheable: adjustable cache depth?

Eric Mangold teratorn at twistedmatrix.com
Tue Dec 12 16:38:34 EST 2006

On Tue, 12 Dec 2006 13:01:19 -0600, Anand Patil <anand at soe.ucsc.edu> wrote:

>> They don't have that capability, no. I guess you could modify them to do
>> that, but I can't think of why you would want to.
>> If you're not sure that's what you want to do, then it might help to
>> explain what you're trying to accomplish and someone on this list may be
>> able to help you.
> This is a statistical algorithm I'm trying to parallelize to run on a
> cluster, and the serial version strongly suggests that the behavior I've
> asked for would be a big help.
> I'll try to describe my serial algorithm succinctly, any advice on
> parallelizing it would be extremely welcome.
> I have a bunch of objects which are nodes in a  directed acyclic graph.
> I've pseudocoded them in the attached file. What I'd like to do is push
> some of the nodes off to other processes running on the cluster and have
> them retain references to their parents. I'll then make repeated calls
> to all nodes' get_prob() methods and periodically update their values.
> It would be nice to make Node.value something like a Cacheable. I'd like
> it to store n remote references, with a timestamp (this just needs to be
> an integer counter, as in the pseudocode) attached to each. When
> queried, it could return its timestamp and value as a tuple.
> Thanks again,
> Anand

Well without really understanding your algorithm I would say you should  
just implement this at the application level, and leave Cacheables alone.

Eric Mangold
Twisted/Win32 Maintainer

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