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https://issues.apache.org/jira/browse/HADOOP-13560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15455406#comment-15455406
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Steve Loughran commented on HADOOP-13560:
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# multi GB files overload heap space when using fast uploader if the mismatch
between generation rate and upload throughput is too big.
# and you can run out of pooled http connections in the AWS library, as that
setting is disconnected
# slow uploader doesn't start upload until close(), so takes a lot longer
# there's not much in the way of visible metrics as to what is happening until
the system finally fails.
> S3A to support huge file writes and operations -with tests
> ----------------------------------------------------------
>
> Key: HADOOP-13560
> URL: https://issues.apache.org/jira/browse/HADOOP-13560
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.9.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
>
> An AWS SDK [issue|https://github.com/aws/aws-sdk-java/issues/367] highlights
> that metadata isn't copied on large copies.
> 1. Add a test to do that large copy/rname and verify that the copy really
> works
> 1. Verify that metadata makes it over.
> Verifying large file rename is important on its own, as it is needed for very
> large commit operations for committers using rename
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