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https://issues.apache.org/jira/browse/HADOOP-12387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-12387.
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Resolution: Duplicate
Assignee: Steve Loughran (was: Thomas Demoor)
> Improve S3AFastOutputStream memory management
> ---------------------------------------------
>
> Key: HADOOP-12387
> URL: https://issues.apache.org/jira/browse/HADOOP-12387
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Reporter: Thomas Demoor
> Assignee: Steve Loughran
>
> The use of ByteArrayOutputStream causes unexpected memory copies that causes
> unintuitive memory usage for certain combinations of the configuration
> parameters. Replacing it by more fine grained memory buffer management would
> fix this, reduce memory usage and eliminate a memory copy.
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