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An obvious question you face when deploying something like FDB is how to write your app on top of it. With FDB it's like RocksDB. You get a transactional key/value store, but that's a very low level interface for apps to work with.
FDB provides "layers", such as the Record layer. It helps map data to keys and values. But a more sophisticated solution that I sometimes wish would take off is this library:
https://permazen.io/
It's a small(ish) open source project that implements an ORM-like API but significantly cleaned up, and it can run on any K/V backend. There's an FDB plugin for it, so you can connect your app directly to an FDB cluster using it. And with that you get built-in indexing, derived data, triggers, you can do queries using the Java collections API, there's a CLI, there's an API for making GUIs and everything else you might need for a business CRUD app. It's got a paper of its own and is quite impressive.
There are a few big gaps vs an RDBMS though:
1. There's no query planner. You write your own plans by using functional maps/filters/folds etc in regular Java (or Kotlin or Python or any other language that can run on the JVM).
2. It's weak on analytics, because there's no access control and the ad-hoc query language is less convenient than SQL.
3. There's no network protocol other than FDB itself, which assumes low latency networks. So if there's a big distance between the user generating the queries and the servers, you have a problem and will need to introduce an app specific protocol (or move the code).
> Any meaningful technology is open source.
Clearly untrue, however FoundationDB is open source, with a permissive license.
https://github.com/apple/foundationdb
So is much of the operational tooling for it:
https://github.com/FoundationDB/fdb-kubernetes-operator
> Any meaningful technology is open source.
Clearly untrue, however FoundationDB is open source, with a permissive license.
https://github.com/apple/foundationdb
So is much of the operational tooling for it:
https://github.com/FoundationDB/fdb-kubernetes-operator
All I could find is https://github.com/FoundationDB/awesome-foundationdb#layers - not sure how complete and up-to-date that list is.