Github user arunmahadevan commented on the pull request:
https://github.com/apache/storm/pull/855#issuecomment-153972196
@harshach Storing tuples in a persistent store would mean we don't rely
completely on storm's acking mechanism and build an independent logic which
could complicate things. To start with we can limit the max window size to
limit the memory. We can track the tuple store for windowing in a separate jira.
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