[log in to unmask] writes: > Just imagine some form of search tree and/or hash mechanism, > only replace the access types with Direct_IO.Count Don't imagine, just grab Adbm from my homepage. This is an indexed file implementation using a hash code at the first level and then a B-Tree on disk... don't remember all the details since I have done it long time ago, I have used it a lot and it seems quite stable... Pascal. -- --|------------------------------------------------------ --| Pascal Obry Team-Ada Member --| 45, rue Gabriel Peri - 78114 Magny Les Hameaux FRANCE --|------------------------------------------------------ --| http://perso.wanadoo.fr/pascal.obry --| --| "The best way to travel is by means of imagination"