ORocksDb
This repository contains some ocaml bindings to the C api of rocksdb. It is most certainly not complete. Not all available/implemented options have been tested. Additions and fixes are always welcome.
The binding is used as part of https://github.com/openvstorage/alba.
In case this library is not sufficient for your needs, then feel free to extend it, or to have a look at one of the alternatives: https://github.com/ahrefs/ocaml-ahrocksdb and https://github.com/chetmurthy/ocaml-rocksdb.