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From "Jean-Daniel Cryans (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2246) Shortcut a local client reads to a Datanodes files directly
Date Fri, 09 Dec 2011 20:18:40 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13166525#comment-13166525
] 

Jean-Daniel Cryans commented on HDFS-2246:
------------------------------------------

bq. If you're on nehalem Todd's work to make the checksumming much faster is kicking in.

I am, but it's when it's not checksumming that u3 is much much faster than 1.0 else with checksumming
if there's a difference it's minimal.
                
> Shortcut a local client reads to a Datanodes files directly
> -----------------------------------------------------------
>
>                 Key: HDFS-2246
>                 URL: https://issues.apache.org/jira/browse/HDFS-2246
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Sanjay Radia
>            Assignee: Jitendra Nath Pandey
>             Fix For: 0.23.1, 1.0.0
>
>         Attachments: 0001-HDFS-347.-Local-reads.patch, HDFS-2246-branch-0.20-security-205.1.patch,
HDFS-2246-branch-0.20-security-205.2.patch, HDFS-2246-branch-0.20-security-205.patch, HDFS-2246-branch-0.20-security-205.patch,
HDFS-2246-branch-0.20-security-205.patch, HDFS-2246-branch-0.20-security.3.patch, HDFS-2246-branch-0.20-security.no-softref.patch,
HDFS-2246-branch-0.20-security.patch, HDFS-2246-branch-0.20-security.patch, HDFS-2246-branch-0.20-security.patch,
HDFS-2246-branch-0.20-security.patch, HDFS-2246-trunk.patch, HDFS-2246-trunk.patch, HDFS-2246-trunk.patch,
HDFS-2246-trunk.patch, HDFS-2246-trunk.patch, HDFS-2246-trunk.patch, HDFS-2246.20s.1.patch,
HDFS-2246.20s.2.txt, HDFS-2246.20s.3.txt, HDFS-2246.20s.4.txt, HDFS-2246.20s.patch, TestShortCircuitLocalRead.java,
localReadShortcut20-security.2patch
>
>


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