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From Chetan Narsude <che...@datatorrent.com>
Subject Re: Window Transactions
Date Fri, 28 Aug 2015 21:14:16 GMT

  BEGIN_WINDOW, and END_WINDOW control events demarcate the the
transaction. We do not hold the first event after BEGIN_WINDOW hostage
until the END_WINDOW is received. This allows us to provide almost zero
latency at per tuple level. This is one of the the differentiating
paradigms for Apex.

  If we do it otherwise - the platform degrades to micro-batch processing
mode. More details about it here:


 Let me know if this answers your question or I misunderstood the question.


On Fri, Aug 28, 2015 at 1:37 PM, Atri Sharma <atri@apache.org> wrote:

> Team,
> Does it make sense to have functionality to have all or nothing
> transactional system for windows? With future functionality to have dynamic
> operators I feel it makes sense to allow data from an entire window to be
> processed or none of the data to be sent.
> I am not sure if window batching in its current form is a logical
> implementation of this feature.
> Thoughts?
> Regards,
> Atri

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