Gentle reminder here that S3 compatability is a sliding window and without further couching of the term it’s more of a marketing term than anything for vendors. What do I mean by this statement? I mean that you can go to cloud vendor Foo and they can tell you they offer s3 compatible api’s or clients but then you find out they only support the most basic of operations, like 30% of the API. Vendor Bar might support 50% of the api and Baz 80%.

In a lot of cases, if your use case is simple, 30% is enough if you’re doing the most common GET and PUT operations etc. But all it takes is one unsupported call in your desired workflow to rule out that vendor as an option until such time that said API is supported. My main beef with this is that there’s no easy way to tell usually unless the vendor provides a support matrix that you have to map to the operations you need, like this: https://docs.storj.io/dcs/api/s3/s3-compatibility. If no such matrix is provided on both the client side and server side you have no easy way to tell if it will even work without wiring things in and attempting to actually execute the code.

One thing to note is that it’s quite unrealistic for vendors to strive for 100% compat - there’s some AWS specific stuff in the API that will basically never be relevant for anyone other than AWS. But the current situation of Wild West could stand for some significant improvement