thanks for the feedback. i moved the code in contrib/db-persistence to core, made DerbyPersistenceManager the "default' pm and removed CQFileSystem references (r328071).
however, i did not yet move contrib/bdb-persistence to core. i realized that this would require adding a berkleydb dependency to jackrabbit-core. i didn't know if this would be ok. the most recent version of "BerkeleyDB Java Edition" available on http://www.ibiblio.org/maven is 1.7.1. the corresponding license can be found here: http://www.ibiblio.org/maven/berkeleydb/licenses/je-1.7.1.license IANAL but the license is certainly not compatible with the apache license. knowledgeable advice would be very welcome. cheers stefan