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Posted to hdfs-dev@hadoop.apache.org by "Kai Zheng (JIRA)" <ji...@apache.org> on 2015/08/17 15:31:46 UTC

[jira] [Created] (HDFS-8902) Uses ByteBuffer on heap or direct ByteBuffer according to used erasure coder in striping read (position and stateful)

Kai Zheng created HDFS-8902:
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             Summary: Uses ByteBuffer on heap or direct ByteBuffer according to used erasure coder in striping read (position and stateful)
                 Key: HDFS-8902
                 URL: https://issues.apache.org/jira/browse/HDFS-8902
             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 read (position and stateful), 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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