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https://issues.apache.org/jira/browse/FLINK-2142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot closed FLINK-2142.
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Resolution: Auto Closed
This issue was labeled "stale-minor" 7 ago and has not received any updates so
I have gone ahead and closed it. If you are still affected by this or would
like to raise the priority of this ticket please re-open, removing the label
"auto-closed" and raise the ticket priority accordingly.
> GSoC project: Exact and Approximate Statistics for Data Streams and Windows
> ---------------------------------------------------------------------------
>
> Key: FLINK-2142
> URL: https://issues.apache.org/jira/browse/FLINK-2142
> Project: Flink
> Issue Type: New Feature
> Components: API / DataStream
> Reporter: Gábor Gévay
> Assignee: Gábor Gévay
> Priority: Minor
> Labels: auto-closed, gsoc2015, stale-assigned, statistics,
> streaming
>
> The goal of this project is to implement basic statistics of data streams and
> windows (like average, median, variance, correlation, etc.) in a
> computationally efficient manner. This involves designing custom PreReducers.
> The exact calculation of some statistics (eg. frequencies, or the number of
> distinct elements) would require memory proportional to the number of
> elements in the input (the window or the entire stream). However, there are
> efficient algorithms and data structures using less memory for calculating
> the same statistics only approximately, with user-specified error bounds.
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