"Groonga is an open-source fulltext search engine and column store."
We seem to be at least cousins. Thx for that link. I will have to get back to you.
Edit:
Groonga seems to be cloud software. ResinDB is a in-process library, not a service.
Put ResinDB behind a service end-point and you have "ResinDB as a service", much more like the Groonga architecture.
Orchestration of read/write in a distributed service-like environment is something that is not solved within the ResinDB codebase. ResinDB is intended to be a component of a distributed database, not a distributed database in itself.
Groonga has been around since 2011. I started on ResinDB last year, in March of 2016.
Groonga make monthly releases. I take long pauses because of my lifestyle.
Groonga is a team of devs. I'm an independent solo dev.
Groonga is unmanaged code. ResinDB is managed code.