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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1081) Performance regression in DistributedFileSystem::getFileBlockLocations in secure systems
Date Tue, 20 Jul 2010 22:36:53 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12890488#action_12890488
] 

Hudson commented on HDFS-1081:
------------------------------

Integrated in Hadoop-Hdfs-trunk-Commit #347 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Hdfs-trunk-Commit/347/])
    HDFS-1081. Performance regression in DistributedFileSystem::getFileBlockLocations in secure
systems.


> 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
>    Affects Versions: 0.22.0
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>             Fix For: 0.22.0
>
>         Attachments: bm1081.scala, HADOOP-1081-Y20-1.patch, HADOOP-1081-Y20-2.patch,
HDFS-1081-trunk.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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