How does Cloud Storage versioning work?

 

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How does Cloud Storage versioning work?

Cloud Storage versioning in Google Cloud Platform (GCP) is a feature that allows you to keep multiple versions of an object in a bucket, providing protection against accidental overwrites and deletions. When versioning is enabled on a bucket, GCP assigns a unique generation number to every object version. This allows users to retrieve, restore, or permanently delete earlier versions as needed.

When you overwrite or delete an object in a versioned bucket, the older version is not lost—it’s retained as a noncurrent version, while the new or updated version becomes the live version. You can then access any version using the generation ID in tools like gsutil, GCS API, or the GCP Console.

Versioning is particularly useful in:

Backup and recovery scenarios

Protecting against accidental deletions or overwrites

Auditing changes to data over time

To enable versioning:

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gsutil versioning set on gs://your-bucket-name

To list all versions of an object:

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gsutil ls -a gs://your-bucket-name/object-name

Keep in mind:

Versioning increases storage costs, as all versions are retained until manually deleted or managed using Object Lifecycle Management rules.

You can configure lifecycle rules to automatically delete older versions after a certain time period or number of versions.

In summary, Cloud Storage versioning provides data durability and traceability, allowing granular control over object changes and enhancing data governance.

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