FuelPHP Forums

Doesn't really matter what you use, I'd only advice not to use cookie based sessions but use a servers-side store.

Fuel supports quite a few, and they all have their pro's and con's. Memory based ones (memcached, redis) are faster, but local and not (always) persistent. DB is slower, but persistent, and sessions also easily scale over multiple frontends.

Database configuration is documented here: http://fuelphp.com/docs/classes/database/introduction.html#/configuration. As suggested, use environment config and not global config, so you can have different configuration files for your development and production environments.