Hi,
MapDB 2.0 beta 1 was just released.
It freezes storage format and API for 2.0 branch.
Stable 2.0 release should be compatible with beta1.
Release notes are here:
http://www.mapdb.org/changelog.html
More explanatory blog post with migration notes here:
http://kotek.net/blog/MapDB_2_beta_1
Thanks everyone who made this possible: to users for reporting bugs,
to CodeFutures for sponsoring this project and to my wife for tolerating it.
Regards,
Jan Kotek