[ https://issues.apache.org/jira/browse/SPARK-28866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen reassigned SPARK-28866: --------------------------------- Assignee: Liang-Chi Hsieh > Persist item factors RDD when checkpointing in ALS > -------------------------------------------------- > > Key: SPARK-28866 > URL: https://issues.apache.org/jira/browse/SPARK-28866 > Project: Spark > Issue Type: Improvement > Components: ML > Affects Versions: 3.0.0 > Reporter: Liang-Chi Hsieh > Assignee: Liang-Chi Hsieh > Priority: Minor > > In ALS ML implementation, if `implicitPrefs` is false, we checkpoint the RDD > of item factors, between intervals. Before checkpointing and materializing > RDD, this RDD was not persisted. It causes recomputation. In an experiment, > there is performance difference between persisting and no persisting before > checkpointing the RDD. -- This message was sent by Atlassian Jira (v8.3.2#803003) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org