Github user ankurdave commented on the pull request:
https://github.com/apache/spark/pull/1297#issuecomment-62687768
@bobbych IndexedRDD handles persistence by caching its partitionsRDD, which
is the MapPartitionsRDD that you're getting back from sc.getPersistentRDDs. As
far as I know this is the only way to get Spark to store the partitions rather
than the individual key-value pairs, but it does prevent getPersistentRDDs from
working. Hopefully it should be easy to store the IndexedRDD in a separate
shared variable.
@pwais Thanks! :) This won't be in 1.2, but it may yet make it into a later
release.
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