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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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Todd Lipcon updated HADOOP-3205:
--------------------------------

    Status: Patch Available  (was: Open)

> 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
>            Reporter: Raghu Angadi
>            Assignee: Todd Lipcon
>         Attachments: 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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