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https://issues.apache.org/jira/browse/BEAM-2500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167608#comment-16167608
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Steve Loughran commented on BEAM-2500:
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This is how Hadoop does its multipart upload
OutputStream which switching to MPU once the amount of data > the block size
https://github.com/apache/hadoop/blob/trunk/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3ABlockOutputStream.java
Option to use: Heap, ByteBuffer of HDD pool for storage
https://github.com/apache/hadoop/blob/trunk/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3ADataBlocks.java
Default is HDD because the others are fussier about thread configuration, a
mismatch between generation rate and upload bandwidth will cause OOM failures,
which invariably happens on a distcp half way through.
If you want to evolve Hadoop FS APIs for better blobstore integration, that's
something to play with (HADOOP-9565 has discussed it for ages). Issue: broad
set of differences between them and the lowest common denominator is too
limited. Justification: making things look like a directory tree with
operations like rename() is even worse —and there is no copy() in the API at
present
I'd go for the core set of verbs: PUT, LIST, COPY, plus the ability to query
the FS for its semantics (consistency model, etc). A cross-store multipart
upload would be trickier
> 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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