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https://issues.apache.org/jira/browse/HADOOP-3205?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom White updated HADOOP-3205:
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Resolution: Fixed
Fix Version/s: 0.22.0
Hadoop Flags: [Reviewed]
Status: Resolved (was: Patch Available)
I've just committed this. Thanks Todd!
> Read multiple chunks directly from FSInputChecker subclass into user buffers
> ----------------------------------------------------------------------------
>
> Key: HADOOP-3205
> URL: https://issues.apache.org/jira/browse/HADOOP-3205
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.22.0
> Reporter: Raghu Angadi
> Assignee: Todd Lipcon
> Fix For: 0.22.0
>
> Attachments: hadoop-3205.txt, hadoop-3205.txt, hadoop-3205.txt,
> hadoop-3205.txt, hadoop-3205.txt
>
>
> Implementations of FSInputChecker and FSOutputSummer like DFS do not have
> access to full user buffer. At any time DFS can access only up to 512 bytes
> even though user usually reads with a much larger buffer (often controlled by
> io.file.buffer.size). This requires implementations to double buffer data if
> an implementation wants to read or write larger chunks of data from
> underlying storage.
> We could separate changes for FSInputChecker and FSOutputSummer into two
> separate jiras.
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