Marco - why do you want data sorted both within and across partitions? If you need to take an ordered sequence across all your data you need to either aggregate your RDD on the driver and sort it, or use zipWithIndex to apply an ordered index to your data that matches the order it was stored on HDFS. You can then get the data in order by filtering based on that index. Let me know if that's not what you need - thanks!
Sent with Good (www.good.com) -----Original Message----- From: Marco [marcope...@gmail.com<mailto:marcope...@gmail.com>] Sent: Monday, April 27, 2015 07:01 AM Eastern Standard Time To: user@spark.apache.org Subject: ReduceByKey and sorting within partitions Hi, I'm trying, after reducing by key, to get data ordered among partitions (like RangePartitioner) and within partitions (like sortByKey or repartitionAndSortWithinPartition) pushing the sorting down to the shuffles machinery of the reducing phase. I think, but maybe I'm wrong, that the correct way to do that is that combineByKey call setKeyOrdering function on the ShuflleRDD that it returns. Am I wrong? Can be done by a combination of other transformations with the same efficiency? Thanks, Marco --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@spark.apache.org For additional commands, e-mail: user-h...@spark.apache.org ________________________________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer.
