Amazon S3 - Multiple keys to one object

Question

I have an S3 bucket with more than 100 million objects in it an each object has a unique key as usual. I was wondering if there is a way to assign another key to some of these objects. Something like this:

Key1 ---> Object1

Key2 ---> Object2

Key3 ---> Object2 (I'd like to add this)

I looked this up in AWS documentation but couldn't find anything relevant.

Another approach could be to create a dummy object with Key3 that redirects to actual object. Would that be easier?

Answer 1

A key is a unique identifier for an object:

From Object Key and Metadata

Each Amazon S3 object has data, a key, and metadata. Object key (or key name) uniquely identifies the object in a bucket.

Another approach could be to create a dummy object with Key3 that redirects to actual object. Would that be easier?

Yes you could do this: you could use User Defined Object Metadata to create Key3, and in the Metadata define a key/value pair like this:

x-amz-meta-KeyAlias=Key2

That Metadata expresses that this key is an alias for another key.

Your app could then read that metadata, and then redirect the request from Key3 to Key2.

If the bucket is exposed as a public website, you could also implement some form of redirection. UPDATE: This works for any object type/extension, when using the Website Endpoint