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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10047) Add a directbuffer Decompressor API to hadoop
Date Tue, 19 Nov 2013 15:49:35 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13826619#comment-13826619
] 

Hudson commented on HADOOP-10047:
---------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #4760 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/4760/])
HADOOP-10047. Add a direct-buffer based apis for compression. Contributed by Gopal V. (acmurthy:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1543456)
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/DirectCompressor.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/DirectDecompressor.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibCompressor.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/zlib/ZlibDecompressor.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/zlib/TestZlibCompressorDecompressor.java


> Add a directbuffer Decompressor API to hadoop
> ---------------------------------------------
>
>                 Key: HADOOP-10047
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10047
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: io
>    Affects Versions: 2.3.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>              Labels: compression
>             Fix For: 2.3.0
>
>         Attachments: DirectCompressor.html, DirectDecompressor.html, HADOOP-10047-WIP.patch,
HADOOP-10047-final.patch, HADOOP-10047-redo-WIP.patch, HADOOP-10047-trunk.patch, HADOOP-10047-with-tests.patch,
decompress-benchmark.tgz
>
>
> With the Zero-Copy reads in HDFS (HDFS-5260), it becomes important to perform all I/O
operations without copying data into byte[] buffers or other buffers which wrap over them.
> This is a proposal for adding a DirectDecompressor interface to the io.compress, to indicate
codecs which want to surface the direct buffer layer upwards.
> The implementation should work with direct heap/mmap buffers and cannot assume .array()
availability.



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