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From "Henry Robinson (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3110) libhdfs implementation of direct read API
Date Tue, 03 Apr 2012 22:56:24 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3110?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Henry Robinson updated HDFS-3110:
---------------------------------

    Attachment: HDFS-3110.3.patch

New patch that's actually a diff vs trunk this time :/

I incorporated most of Todd's suggestions. I've left HDFS_FILE_SUPPORTS_DIRECT_READ in hdfs.h
for now so that users who *really* want to turn off support for some reason (perhaps a bug)
have access to the flag that they can set in hdfsFile's guts. 

I ran the tests against the default local filesystem when no fs.default.name is set, and observed
no errors except that the tests expect readDirect to be available.
                
> libhdfs implementation of direct read API
> -----------------------------------------
>
>                 Key: HDFS-3110
>                 URL: https://issues.apache.org/jira/browse/HDFS-3110
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: libhdfs
>            Reporter: Henry Robinson
>            Assignee: Henry Robinson
>             Fix For: 0.24.0
>
>         Attachments: HDFS-3110.0.patch, HDFS-3110.1.patch, HDFS-3110.2.patch, HDFS-3110.3.patch
>
>
> Once HDFS-2834 gets committed, we can add support for the new API to libhdfs, which leads
to significant performance increases when reading local data from C.

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