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From Avery Ching <ach...@apache.org>
Subject Re: Restarting Algorithm Pattern
Date Tue, 04 Jun 2013 07:05:21 GMT
Rather than use voteToHalt, you could add an Aggregator that kept track 
of the "alive vertices" and then you can use an Aggregator to store/set 
your configuration value that the Master computation can modify.  Do the 
logic in the Master computation and all should be well.

Avery

On 6/3/13 10:04 PM, David Gainer wrote:
>
> I have an algorithm where I'd like to iterative over the vertices with 
> a configuration variable set to some value.  Then, when all the 
> vertices vote to halt, I'd like to reduce the configuration variable 
> and repeat the inner iteration until some threshold of the 
> configuration variable is reached.  I was wondering what the natural 
> way of programming that would be.  It seems like a master Computing 
> situation -- but I didn't see any method for un-halting vertices.  I 
> also wasn't sure when A vertex would ever be able to call its own 
> wakeup function.
>
> Thanks,
>
> David
>


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