Berkeley DB

Flat-Text Backing Files

It is possible to back any Recno database (either fixed- or variable-length) with a flat-text source file. This provides fast read (and potentially write) access to databases that are normally created and stored as flat-text files. The backing source file may be specified by calling the DB→set_re_source function.

The backing source file will be read to initialize the database. In the case of variable length records, the records are assumed to be separated, as described for the DB→set_re_delim function interface. For example, standard UNIX byte stream files can be interpreted as a sequence of variable length records separated by ASCII newline characters. This is the default.

When cached data would normally be written back ...