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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-755) Read multiple checksum chunks at once in DFSInputStream
Date Mon, 07 Dec 2009 05:28:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12786788#action_12786788
] 

Raghu Angadi commented on HDFS-755:
-----------------------------------

The patch looks good except that BlockReader.in seems to buffered with a large buffer. Most
of the data might still be going through extra copy.

I haven't run the patch yet... 

> Read multiple checksum chunks at once in DFSInputStream
> -------------------------------------------------------
>
>                 Key: HDFS-755
>                 URL: https://issues.apache.org/jira/browse/HDFS-755
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs client
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-755.txt, hdfs-755.txt, hdfs-755.txt, hdfs-755.txt, hdfs-755.txt
>
>
> HADOOP-3205 adds the ability for FSInputChecker subclasses to read multiple checksum
chunks in a single call to readChunk. This is the HDFS-side use of that new feature.

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