Sandy Ryza created SPARK-4716: --------------------------------- Summary: Avoid shuffle when all-to-all operation has single input and output partition Key: SPARK-4716 URL: https://issues.apache.org/jira/browse/SPARK-4716 Project: Spark Issue Type: Improvement Components: Spark Core Affects Versions: 1.2.0 Reporter: Sandy Ryza
I encountered an application that performs joins on a bunch of small RDDs, unions the results, and then performs larger aggregations across them. Many of these small RDDs fit in a single partition. For these operations with only a single partition, there's no reason to write data to disk and then fetch it over a socket. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org