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Posted to issues@spark.apache.org by "Shivaram Venkataraman (JIRA)" <ji...@apache.org> on 2015/04/10 00:57:14 UTC

[jira] [Created] (SPARK-6830) Memoize frequently queried vals in RDD, such as numPartitions, count etc.

Shivaram Venkataraman created SPARK-6830:
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             Summary: Memoize frequently queried vals in RDD, such as numPartitions, count etc.
                 Key: SPARK-6830
                 URL: https://issues.apache.org/jira/browse/SPARK-6830
             Project: Spark
          Issue Type: Improvement
          Components: SparkR
            Reporter: Shivaram Venkataraman
            Priority: Minor


We should memoize frequently queried vals in RDD, such as numPartitions, count etc.

While using SparkR in RStudio, the `count` function seems to be called frequently by the IDE – I think this is to show some stats about variables in the workspace etc. but this is not great in SparkR as we trigger a job every time count is called.
Memoization would help in this case, but we should also see if there is some better way to interact with RStudio.




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