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Posted to issues@spark.apache.org by "gagan taneja (JIRA)" <ji...@apache.org> on 2017/03/05 02:00:35 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=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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