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From Claudio Martella <>
Subject Re: Waking up all the vertices after every vertex calls vote to halt
Date Thu, 21 Nov 2013 22:45:40 GMT
Hi Ameya,

I'm not sure I understand the problem correctly. The maximum number of
supersteps allows you to halt the computation when that threshold is
reached. The RMSE can be computed within the master compute.

What do you want to achieve exactly?

On Thu, Nov 21, 2013 at 10:47 PM, Ameya Vilankar

> Hi,
> I am implementing a machine learning algorithm on top giraph. The
> algorithm converges when all the vertices call voteToHalt or some max
> number of supersteps have completed.
> I want to calculate the RMSE error  after the algorithm has converged. But
> the problem is either all the vertices have called vote to halt or (in the
> case where we reach max supersteps) only some of them are still active.
> I need to reactivate or wake up all the vertices. Is there any way in
> giraph that I could do this?
> Thanks,
> Ameya Vilankar
> Zynga

   Claudio Martella

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