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https://issues.apache.org/jira/browse/SAMZA-252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14031226#comment-14031226
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Chris Riccomini commented on SAMZA-252:
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+1 This reads really well.
> Document stream reprocessing
> ----------------------------
>
> Key: SAMZA-252
> URL: https://issues.apache.org/jira/browse/SAMZA-252
> Project: Samza
> Issue Type: Improvement
> Components: docs
> Affects Versions: 0.6.0
> Reporter: Chris Riccomini
> Assignee: Martin Kleppmann
> Fix For: 0.7.0
>
> Attachments: SAMZA-252.1.patch, SAMZA-252.2.patch
>
>
> A need with stream processing is to want to re-process prior messages at some
> later date. An example of this is having a stream processing job that is
> classifying messages in some way using a machine learning algorithm. At some
> point, the algorithm will be updated with a more accurate vector of weights.
> When this happens, usually you wish to re-process past messages to get more
> accurate results. Usually this is solved by running a parallel pipeline from
> Hadoop.
> We have thought extensively about this use case, and should document how to
> use Samza in a re-processing use case.
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