Steve Loughran created HADOOP-16190:
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Summary: S3A copyFile operation to include source versionID or etag in the copy
request
Key: HADOOP-16190
URL: https://issues.apache.org/jira/browse/HADOOP-16190
Project: Hadoop Common
Issue Type: Sub-task
Components: fs/s3
Affects Versions: 3.2.0
Reporter: Steve Loughran
The S3 {{CopyObjectRequest}} structure used to build a copy request takes, optionally
* a version ID of the source file
* the etag of the source file
using these will guarantee that the source file is copied exactly once
1. When working with S3Guard in auth mode, and the etag/version are kept in the DDB table,
that should be the authoritative source of metadata: fail fast if the file is out of date
2. And when non-auth mode is used, the getObjectMetadata check made should update the s3guard
table if needed.
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