Clojurians Log v2

it uses LMDB. Has nothing to do with ms access.

mdb means "memory mapped database"

Thank you for the answers, Is it possible to implement , custom db backend like postgres for the datalevin?

I do not see the point. If that's what you want to do, there are plenty of other options.

I consider "switchable db backend" one of the anti-patterns in programming.