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https://issues.apache.org/jira/browse/SPARK-16427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15371321#comment-15371321
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Nicholas Chammas commented on SPARK-16427:
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Oh nevermind, this information is all available here:
http://spark.apache.org/docs/1.6.2/programming-guide.html#rdd-persistence
> Expand documentation on the various RDD storage levels
> ------------------------------------------------------
>
> Key: SPARK-16427
> URL: https://issues.apache.org/jira/browse/SPARK-16427
> Project: Spark
> Issue Type: Improvement
> Components: Documentation
> Reporter: Nicholas Chammas
> Priority: Minor
>
> Looking at the docs here
> http://spark.apache.org/docs/1.6.2/api/python/pyspark.html#pyspark.StorageLevel
> A newcomer to Spark won’t understand the meaning of {{_2}}, or the meaning of
> {{_SER}} (or its value), and won’t understand how exactly memory and disk
> play together when something like {{MEMORY_AND_DISK}} is selected.
> We should expand this documentation to explain what the various levels mean
> and perhaps even when a user might want to use them.
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