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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5634) allow BlockReaderLocal to switch between checksumming and not
Date Wed, 11 Dec 2013 20:07:07 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845689#comment-13845689
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Colin Patrick McCabe commented on HDFS-5634:
--------------------------------------------

update: there are a bunch of things in DFSConfigKeys not in hdfs-default.xml.  I created HDFS-5656
for this, since it's a change we'd want to do and quickly merge to branch-2.3, etc, and also
because it can be decoupled from this JIRA.

> allow BlockReaderLocal to switch between checksumming and not
> -------------------------------------------------------------
>
>                 Key: HDFS-5634
>                 URL: https://issues.apache.org/jira/browse/HDFS-5634
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>    Affects Versions: 3.0.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-5634.001.patch, HDFS-5634.002.patch
>
>
> BlockReaderLocal should be able to switch between checksumming and non-checksumming,
so that when we get notifications that something is mlocked (see HDFS-5182), we can avoid
checksumming when reading from that block.



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