Samrat002 commented on code in PR #27937:
URL: https://github.com/apache/flink/pull/27937#discussion_r3098855937
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docs/content/docs/deployment/filesystems/s3.md:
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@@ -64,94 +64,208 @@ env.configure(config);
Note that these examples are *not* exhaustive and you can use S3 in other
places as well, including your [high availability setup]({{< ref
"docs/deployment/ha/overview" >}}) or the [EmbeddedRocksDBStateBackend]({{< ref
"docs/ops/state/state_backends" >}}#the-rocksdbstatebackend); everywhere that
Flink expects a FileSystem URI (unless otherwise stated).
-For most use cases, you may use one of our `flink-s3-fs-hadoop` and
`flink-s3-fs-presto` S3 filesystem plugins which are self-contained and easy to
set up.
-For some cases, however, e.g., for using S3 as YARN's resource storage dir, it
may be necessary to set up a specific Hadoop S3 filesystem implementation.
+## S3 FileSystem Implementations
-### Hadoop/Presto S3 File Systems plugins
+Flink provides three independent S3 filesystem implementations:
-{{< hint info >}}
-You don't have to configure this manually if you are running [Flink on
EMR](https://docs.aws.amazon.com/emr/latest/ReleaseGuide/emr-flink.html).
-{{< /hint >}}
+| Implementation | Checkpointing | FileSink | Notes |
+|---------------|:---:|:---:|-------|
+| **Native S3** (`flink-s3-fs-native`) | ✓ | ✓ | **Experimental** in Flink
2.3. Built on AWS SDK v2; no Hadoop dependency. |
+| **Presto S3** (`flink-s3-fs-presto`) | ✓ | x | Production-proven for
checkpointing. |
+| **Hadoop S3** (`flink-s3-fs-hadoop`) | ✓ | ✓ | Mature; the only stable
implementation that provides `RecoverableWriter` for the FileSink. |
Review Comment:
Thanks for the suggestion @davidradl. I thought about this, but I think
RecoverableWriter is the wrong abstraction level for this table. it's an
internal API, not a user-facing capability. A separate column would be
redundant with the FileSink column.
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