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https://issues.apache.org/jira/browse/HADOOP-14081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15875140#comment-15875140
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Rajesh Balamohan commented on HADOOP-14081:
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Thanks [~ste...@apache.org]. I ran with "mvn test -Dtest=ITestS\* -Dscale". I
should have used scale test param for huge filesize upload.
> 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: Sub-task
> Components: fs/s3
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Priority: Minor
> Fix For: 2.8.0
>
> Attachments: HADOOP-14081.001.patch
>
>
> 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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