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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Edited] (HBASE-4026) Use JNA to allocate buffers in the block cache
Date Fri, 24 Jun 2011 01:27:47 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054203#comment-13054203
] 

Ted Yu edited comment on HBASE-4026 at 6/24/11 1:27 AM:
--------------------------------------------------------

According to https://github.com/twall/jna/blob/master/LICENSE, it is GPL

      was (Author: yuzhihong@gmail.com):
    According to https://github.com/twall/jna/blob/master/LICENSE, it it GPL
  
> Use JNA to allocate buffers in the block cache
> ----------------------------------------------
>
>                 Key: HBASE-4026
>                 URL: https://issues.apache.org/jira/browse/HBASE-4026
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Jason Rutherglen
>            Priority: Minor
>
> The HBase block cache can be problematic because it is unpredictable when Java will reclaim
the unused byte arrays using garbage collection.  
> JNA (Java Native Access from Sun/Oracle) provides one possible way to solve this problem.
> https://github.com/twall/jna
> Memory is the name of the class that can be used to test the implementation.
> https://github.com/twall/jna/blob/master/src/com/sun/jna/Memory.java

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