Storage Drivers
It is generally a good idea to use an SQL backend with DSPAM, for several reasons:
You can run DSPAM in daemon mode (with the MySQL and Postgres drivers) because the storage drivers needs to be thread safe in order to do that.
Management of the storage is eased (use your favourite tools).
Cleaning up of token data is elegant and fast.
Berkeley DB has its issues and is considered deprecated for use with DSPAM.
If you need maximum performance and have enough memory, the hash driver is recommended (you should also use it if you want to use Markovian weighting).
The following pages contain information on how to use DSPAM with several popular databases: