There's some question about the ultimate fate of back-bdb and back-hdb. Eventually I'd like to see back-bdb replaced by back-hdb. As such, the question will be moot. So far back-hdb has been faster on all my tests, but I haven't seen its performance in a really large database under heavy load.
--Quanah
-- Quanah Gibson-Mount Senior Systems Administrator ITSS/TSS/Computing Systems Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html