[codeslinger]

Disclaimer: ex-AWS here.

This article ends up making a compelling case for DynamoDB. It has the properties he describes wanting. Many, many systems inside of Amazon are built with DDB as the primary datastore. I don't know of any OSS commensurate to DDB, but it would be quite interesting for one to appear.

> "Every transaction can only be in one shard" only works for simple business logics.

You'd be quite surprised at what you can get out of this model. Check out the later chapters of the DynamoDB Book [1] for some neat examples.

[1] https://dynamodbbook.com/

[bboreham]

The famous OSS database patterned after DynamoDB is https://cassandra.apache.org/

(Wondering if you never heard of it or if you don’t consider it commensurate).