[mastabadtomm]

There is one more project that aims to build a MongoDB-like query engine and uses Redis wire protocol. It's Kronotop: https://github.com/kronotop/kronotop

Kronotop uses FoundationDB as a metadata store for document indexes and the other stuff. It stores the document bodies on the local disk and supports primary-follower replication.

It also works as a RESP3/RESP2 proxy for FoundationDB API.