sqlightning

https://github.com/LMDB/sqlightning https://github.com/LumoSQL/LumoSQL

I'm guessing you mean "and the software is fast enough", because OpenLDAP itself has been the world's fastest distributed database for over a decade, and nothing else even comes close. Since you built on top of SQLite, then you're already at least an order of magnitude slower. You could speed it up a bit by using SQLightning, which replaces SQLite's Btree engine with OpenLDAP's. https://github.com/LMDB/sqlightning But yes, it's obvious your aim is to provide bare minimum LDAP functionality for people who were only taught SQL and have no desire to learn LDAP. A bit of a loss, because the workloads LDAP is used for most often are things RDBMSs suck at.

Have you seen SQLightning and/or LumoSQL? * https://github.com/LMDB/sqlightning * https://github.com/LumoSQL/LumoSQL SQLightning was the initial project combining SQLite3 with an LMDB backend. It seemed to be more an experimental/Proof-of-Concept thing, and isn't maintained. LumoSQL is an alternative project (maintained), providing a SQLite3 front end with various optional storage backends. One of which is LMDB. Note - I'm not affiliated with either project, I just remembered they exist. :)

This has been shared without context but I guess the SQLite team is starting to modularize the btree code in order to facilitate work like SQLightning: https://github.com/LMDB/sqlightning At the time SQLightning greatly improved SQLite performance but due to LMDB's requirement to have keys fit in 2/3 of a page it wasn't really useful as a general purpose replacement of SQLite's internal b-tree implementation. EDIT: It looks like SQLightning got adopted and has been worked on by the SQLite team under the name LumoSQL. Here's the project's readme: https://lumosql.org/src/lumosql/doc/trunk/README.md which contains at the end "A Brief History of LumoSQL"