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C. The Berkeley DB Database

C.1 Overview

The database package from Berkeley is called db . It contains hash and btree routines and gets rid of many of the limitations that exist in earlier database versions (such as dbm (3) and ndbm (3)). If your site has, or expects to have, huge alias (5) files - say 2000 lines or more - or many database files, you should consider db to be mandatory. This new database is also recommended because its accesses and updates are considerably faster.