IBM provides ODBC driver for DB2 which works with Linux and
macOS. Follow the installation instructions from IBM and then configure
Radiator to use ODBC to access DB2. For more information, see
Section 19.8. ODBC. There is also DBD::DB2 in
CPAN which works directly without ODBC.
Other databases should work with
Radiator provided that there is a native DBD driver or ODBC driver
available for them.