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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/02/23 07:40:44 UTC

[jira] [Commented] (SPARK-19705) Preferred location supporting HDFS Cache for FileScanRDD

    [ https://issues.apache.org/jira/browse/SPARK-19705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15880058#comment-15880058 ] 

Apache Spark commented on SPARK-19705:
--------------------------------------

User 'tanejagagan' has created a pull request for this issue:
https://github.com/apache/spark/pull/17035

> 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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