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Posted to issues@spark.apache.org by "Kevin Mader (JIRA)" <ji...@apache.org> on 2014/12/09 19:22:12 UTC

[jira] [Created] (SPARK-4800) RDD Preview Feature in WebUI

Kevin Mader created SPARK-4800:
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             Summary: RDD Preview Feature in WebUI
                 Key: SPARK-4800
                 URL: https://issues.apache.org/jira/browse/SPARK-4800
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core, Web UI
            Reporter: Kevin Mader


For debugging and monitoring analysis, it would be very useful to have an RDD preview feature that would show 'previews' for persistent RDDs. These previews could be very simple for known types DoubleRDD (mean, std, min, max) and could be optionally extended by implementing a sub-class (showing histograms, plotting Key-value pairs, etc)

The component would add an additional load if used to the Context since the RDD "first", "count", etc methods would need to be invoked, but it could be kept fairly lightweight.



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