[jira] [Commented] (HBASE-4026) Use JNA to allocate buffers in the block cache

["Ted Yu (JIRA)" <ji...@apache.org>]

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

Ted Yu commented on HBASE-4026:
-------------------------------

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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