LittleD is designed to run on devices the size of (higher-end) Arduinos. So, it's difference of not being able to use a database and being able to use it. Relia

LittleD is designed to run on devices the size of (higher-end) Arduinos. So, it's difference of not being able to use a database and being able to use it. Reliability is a different problem, which is addressed for deeply embedded devices is slightly different ways than for bloated servers (e.g. by employing flash memory properties, or monitoring power supply in realtime).