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Xuefu Zhang commented on HIVE-7333: ----------------------------------- That's correct. Rui. RDD is a dataset of rows. How the data is persisted on disk is up to the serde. For Orc file, it might be more performing if reading a set of rows instead of one row at a time. I'm not sure if Spark RDD is taking advantage of that (I doubt). > Create RDD translator, translating Hive Tables into Spark RDDs [Spark Branch] > ----------------------------------------------------------------------------- > > Key: HIVE-7333 > URL: https://issues.apache.org/jira/browse/HIVE-7333 > Project: Hive > Issue Type: Sub-task > Components: Spark > Reporter: Xuefu Zhang > Assignee: Rui Li > Labels: Spark-M1 > > Please refer to the design specification. -- This message was sent by Atlassian JIRA (v6.3.4#6332)