[Exist-open] More recent B-Tree implementation with better concurrency support

[Omar S. <si...@gm...>]

Hi!

Looking for other examples of the techniques at the bottom of exist-db I 
stumbled upon MapDB ("JDBM4"). Obviously Adam Retter came across this 
too on a search for a "battle-worn B-Tree implementation" 
(https://groups.google.com/forum/?fromgroups#!topic/mapdb/xqUMPOBGHPs). 
Is there any further progress on this search? Did he search for some 
other project?

Best Regards
Omar Siam