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https://issues.apache.org/jira/browse/HADOOP-11183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14339595#comment-14339595
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Steve Loughran commented on HADOOP-11183:
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# does {{TestS3ASmallMultiPartUpload}} actually enable the new feature?
# a 40 MB upload/download can still take time on a slow link. Could we make
this smaller, so the whole upload size is less than, say 1 MB?
> Memory-based S3AOutputstream
> ----------------------------
>
> Key: HADOOP-11183
> URL: https://issues.apache.org/jira/browse/HADOOP-11183
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.6.0
> Reporter: Thomas Demoor
> Assignee: Thomas Demoor
> Attachments: HADOOP-11183-004.patch, HADOOP-11183-005.patch,
> HADOOP-11183-006.patch, HADOOP-11183.001.patch, HADOOP-11183.002.patch,
> HADOOP-11183.003.patch, design-comments.pdf
>
>
> Currently s3a buffers files on disk(s) before uploading. This JIRA
> investigates adding a memory-based upload implementation.
> The motivation is evidently performance: this would be beneficial for users
> with high network bandwidth to S3 (EC2?) or users that run Hadoop directly on
> an S3-compatible object store (FYI: my contributions are made in name of
> Amplidata).
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