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From "Jakob Homan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1081) Performance regression in DistributedFileSystem::getFileBlockLocations in secure systems
Date Sat, 17 Apr 2010 00:35:27 GMT

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

Jakob Homan updated HDFS-1081:
------------------------------

    Attachment: HADOOP-1081-Y20-2.patch

Updated with correct protocol bumps.  Per Konstantin, the protocol should be bumped to 1+
current trunk, to avoid collisions with previously used values.  Trunk version of protocols
will be bumped as well, as soon as trunk patch is ready...

> 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: HADOOP-1081-Y20-1.patch, HADOOP-1081-Y20-2.patch
>
>
> 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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