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