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From "gagan taneja (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-19705) Preferred location supporting HDFS Cache for FileScanRDD
Date Sun, 05 Mar 2017 02:00:35 GMT

    [ https://issues.apache.org/jira/browse/SPARK-19705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15896026#comment-15896026
] 

gagan taneja commented on SPARK-19705:
--------------------------------------

Herman,
Can you help me with this enhancement
thanks

> Preferred location supporting HDFS Cache for FileScanRDD
> --------------------------------------------------------
>
>                 Key: SPARK-19705
>                 URL: https://issues.apache.org/jira/browse/SPARK-19705
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: gagan taneja
>
> Although NewHadoopRDD and HadoopRdd considers HDFS cache while calculating preferredLocations,
FileScanRDD do not take into account HDFS cache while calculating preferredLocations
> The enhancement can be easily implemented for large files where FilePartition only contains
single HDFS file
> The enhancement will also result in significant performance improvement for cached hdfs
partitions



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