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From "Rajesh Balamohan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-14081) S3A: Consider avoiding array copy in S3ABlockOutputStream (ByteArrayBlock)
Date Wed, 15 Feb 2017 14:14:41 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14081?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rajesh Balamohan updated HADOOP-14081:
--------------------------------------
    Status: Patch Available  (was: Open)

> 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
>            Priority: Minor
>         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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