[ https://issues.apache.org/jira/browse/SPARK-20414?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yang Yang updated SPARK-20414: ------------------------------ Flags: Patch Description: currently in the MLlib topByKey() function, it directly calls aggregateByKey(), which by default uses very few partitions/reducers, in my experience I see only 16 reducers for a 100GB input. the aggregateByKey() has an optional reducer count, adding this option to the top level topByKey() > avoid creating only 16 reducers when calling topByKey() > ------------------------------------------------------- > > Key: SPARK-20414 > URL: https://issues.apache.org/jira/browse/SPARK-20414 > Project: Spark > Issue Type: Improvement > Components: MLlib > Affects Versions: 1.5.2, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 2.0.0, 2.0.1, 2.0.2, > 2.1.0 > Reporter: Yang Yang > Priority: Minor > > currently in the MLlib topByKey() function, it directly calls > aggregateByKey(), which by default uses very few partitions/reducers, in my > experience I see only 16 reducers for a 100GB input. > the aggregateByKey() has an optional reducer count, adding this option to the > top level topByKey() -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org