So my first question: Does mdb have limitations like bdb it have aka BDB_IDL_LOGN?
Yes. back-mdb is ~60% the same code as back-bdb/hdb, its indexing functions are basically identical.
However, I never got mdb to work successfully by modifying these values.
Does this mean, it's not possible at moment to get running the mdb with BDB_IDL_LOGN = 2^17?
@Howard: I'm sorry, it was really not my intention to annoy, because of my statement about this problem in the bdb/mdb. Yes and I've read/followed each document under http://symas.com/mdb/, but not every one is a developer and not all of them is easy to understand. I try to get deeper inside to openldap and understand how it works, but it is really hard ;-)
But anyway, I have to say thanks to all the great work you and the developer have done on openldap and especially mdb too!
Thanks Meike