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Posted to common-dev@hadoop.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2017/02/14 09:33:41 UTC

[jira] [Created] (HADOOP-14081) S3A: Consider avoiding array copy in S3ABlockOutputStream (ByteArrayBlock)

Rajesh Balamohan created HADOOP-14081:
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             Summary: S3A: Consider avoiding array copy in S3ABlockOutputStream (ByteArrayBlock)
                 Key: HADOOP-14081
                 URL: https://issues.apache.org/jira/browse/HADOOP-14081
             Project: Hadoop Common
          Issue Type: Improvement
          Components: fs/s3
            Reporter: Rajesh Balamohan
            Priority: Minor


In {{S3ADataBlocks::ByteArrayBlock}}, data is copied whenever {{startUpload}} is called. It might be possible to directly access the byte[] array from ByteArrayOutputStream. 

Might have to extend ByteArrayOutputStream and create a method like getInputStream() which can return ByteArrayInputStream.  This would avoid expensive array copy during large upload.



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