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From "Hong Tang (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-6662) hadoop zlib compression does not fully utilize the buffer
Date Mon, 29 Mar 2010 17:37:27 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Hong Tang resolved HADOOP-6662.

    Resolution: Duplicate

> hadoop zlib compression does not fully utilize the buffer
> ---------------------------------------------------------
>                 Key: HADOOP-6662
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6662
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 0.20.2
>            Reporter: Xiao Kang
> org.apache.hadoop.io.compress.ZlibCompressonr does not fully utilize its buffer. 
> Its needesInput() return false when there is any data in its buffer (64K by default).
The performance will greately degrade since an JNI call will be invoded at each time the write()
method of CompressonStream is called. 

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