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https://issues.apache.org/jira/browse/HDFS-1081?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jakob Homan updated HDFS-1081:
------------------------------

    Attachment: bm1081.scala

Script to benchmark this optimization.

> Performance regression in DistributedFileSystem::getFileBlockLocations in 
> secure systems
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-1081
>                 URL: https://issues.apache.org/jira/browse/HDFS-1081
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: security
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>         Attachments: bm1081.scala, HADOOP-1081-Y20-1.patch, 
> HADOOP-1081-Y20-2.patch, HDFS-1081-trunk.patch, results.xlsx
>
>
> We've seen a significant decrease in the performance of 
> DistributedFileSystem::getFileBlockLocations() with security turned on Y20. 
> This JIRA is for correcting and tracking it both on Y20 and trunk.

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