S3 Versioning and Object Recovery
Explore how to manage S3 versioning to protect objects against overwrites and deletions. Understand how to enable versioning, inspect version histories, and recover specific object versions to maintain reliable data recovery and storage integrity within AWS.
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The smallest reliable recovery in S3 starts with one object. It changes twice, gets deleted once, and then gets restored by picking a specific version and making it current again. With S3 Versioning, every PUT can create a new VersionId, and a DELETE usually creates a delete marker instead of removing prior bytes.
The verification points in this workflow are concrete and observable. After the second write, list-object-versions should show multiple versions and exactly one IsLatest=true. After the delete, list-object-versions should show a delete marker as the latest version, which explains why a normal GET returns NoSuchKey. After the restore, a normal GET should return the intended earlier content, and list-object-versions should show a new latest version that matches the recovered bytes.
Enable versioning and prove versions exist
A test bucket needs provisioning first, with versioning turned on. Without versioning enabled, S3 overwrites in place, and there's nothing to roll back to. A dedicated test name and region help prevent collisions with real data. Keep costs in mind: more versions ...