I ended up writing a small wrapper on top of SQLite based on this: https://dgl.cx/2020/06/sqlite-json-support https://dgl.cx/2020/06/sqlite-json-support With p

I ended up writing a small wrapper on top of SQLite based on this: https://dgl.cx/2020/06/sqlite-json-support https://dgl.cx/2020/06/sqlite-json-support With proper concurrency control, it can work very well even for multi process applications.