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https://issues.apache.org/jira/browse/BEAM-2500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16166823#comment-16166823
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Luke Cwik commented on BEAM-2500:
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The GCS implementation uses a fixed size buffer of 32 or 64mbs (don't remember
which) so buffering in memory is a common practice. 500 mbs does seem like a
lot but even if you went with 32 mbs, you could support files up to ~320 gb.
> Add support for S3 as a Apache Beam FileSystem
> ----------------------------------------------
>
> Key: BEAM-2500
> URL: https://issues.apache.org/jira/browse/BEAM-2500
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-extensions
> Reporter: Luke Cwik
> Priority: Minor
> Attachments: hadoop_fs_patch.patch
>
>
> Note that this is for providing direct integration with S3 as an Apache Beam
> FileSystem.
> There is already support for using the Hadoop S3 connector by depending on
> the Hadoop File System module[1], configuring HadoopFileSystemOptions[2] with
> a S3 configuration[3].
> 1: https://github.com/apache/beam/tree/master/sdks/java/io/hadoop-file-system
> 2:
> https://github.com/apache/beam/blob/master/sdks/java/io/hadoop-file-system/src/main/java/org/apache/beam/sdk/io/hdfs/HadoopFileSystemOptions.java#L53
> 3: https://wiki.apache.org/hadoop/AmazonS3
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