Databases with prefixes

[joximu]

MYSQL_PREFIX_TYPE = 'infront'

I recommend this for every ISP.

My points:
you need a prefix otherwise two customers want a DB named test -> problem
you need a short prefix because the username length is limited (16 chars) -> therefore only customer number...
prefix must be infront otherwise a 16 char db username is not unique (or you should check the length so a prefix at the end can be added).

If you add a customer name as prefix - eg. "testdomain.com" then you are in troubles with the length of the user name.