Thanks Howard, Then I guess I have 2 follow-up questions:
1. Just to confirm (something I didn't get a clear answer): when MDB_NOTLS is set, a cursor opened by a rw txn can be serially accessed by multiple threads, one at a time. Is this write? 2. What does "Cursors may not span transactions" specifically mean? In my understanding, a cursor belongs to one and only one txn, I didn't find an LMDB API that allows users to operate a cursor with some random transactions? Thanks, Xiaoya
