[jira] [Created] (HDFS-8903) Uses ByteBuffer on heap or direct ByteBuffer according to used erasure coder in striping write

[Kai Zheng (JIRA)]

Kai Zheng created HDFS-8903:
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             Summary: Uses ByteBuffer on heap or direct ByteBuffer according to 
used erasure coder in striping write
                 Key: HDFS-8903
                 URL: https://issues.apache.org/jira/browse/HDFS-8903
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Kai Zheng
            Assignee: Kai Zheng


We would choose ByteBuffer on heap or direct ByteBuffer according to used 
erasure coder in striping write, for performance consideration. Pure Java 
implemented coder favors on heap one, though native coder likes more direct 
one, avoiding data copy.



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