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authorsandy <phalodi@gmail.com>2016-07-13 11:33:46 +0100
committerSean Owen <sowen@cloudera.com>2016-07-13 11:33:46 +0100
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parent83879ebc5850b74369a5b066c65fa9929bbdb21c (diff)
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[SPARK-16438] Add Asynchronous Actions documentation
## What changes were proposed in this pull request? Add Asynchronous Actions documentation inside action of programming guide ## How was this patch tested? check the documentation indentation and formatting with md preview. Author: sandy <phalodi@gmail.com> Closes #14104 from phalodi/SPARK-16438.
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+The Spark RDD API also exposes asynchronous versions of some actions, like `foreachAsync` for `foreach`, which immediately return a `FutureAction` to the caller instead of blocking on completion of the action. This can be used to manage or wait for the asynchronous execution of the action.
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### Shuffle operations
Certain operations within Spark trigger an event known as the shuffle. The shuffle is Spark's