Tsz Wo Nicholas Sze created HDDS-372:
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             Summary: There are two buffer copies in ChunkOutputStream
                 Key: HDDS-372
                 URL: https://issues.apache.org/jira/browse/HDDS-372
             Project: Hadoop Distributed Data Store
          Issue Type: Improvement
          Components: Ozone Client
            Reporter: Tsz Wo Nicholas Sze
            Assignee: Tsz Wo Nicholas Sze


Currently, there are two buffer copies in ChunkOutputStream
# from byte[] to ByteBuffer, and
# from ByteBuffer to ByteString.

We should eliminate the ByteBuffer in the middle.

For zero copy io, we should support WritableByteChannel instead of 
OutputStream.  It won't be done in this JIRA.



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