Chapter 5.4 - Versioning Objects in S3

Question 1

What is Versioning?

Answer 1

Version control of your objects or files.

Question 2

What are the advantages of Versioning?

Answer 2

• All versions of an object are stored in S3. This includes all writes and even if you delete an object.
• Can be a great backup tool.
• Once enabled, versioning cannot be disabled, only suspended.
• Can be integrated with lifecycle rules.
• Can support multi-factor authentication.

Question 3

How are versions of objects or files listed in AWS?

Answer 3

In a reverse chronological file tree.
Example:
     * Delete Marker
          * Version 3
               * Version 2
                    * Version 1

Question 4

Are old versions public by default?

Answer 4

No.
Even when you have a policy that enables all objects in a bucket to be public, it doesn’t apply to previous versions of those objects. You must manually make older versions public.

Question 5

With Versioning enabled, what happens when you delete an object in AWS?

Answer 5

The system does not actually delete the object but rather inserts a Delete Marker at the top of the file tree making the object inaccessible

Question 6

With Versioning enabled, how do you make a deleted object accessible again?

Answer 6

You must delete the Delete Marker.