Cloud Web Database
Drizzle is a lightweight web database for cloud and web applications. The first GA (General Availability)release is called Drizzle7 GA. This DBMS is described by its developers as an "open source microkernel DBMS for high performance scale-out applications." Development on the Drizzle project was begun in 2008 as a fork by Sun employees with the goal of getting MySQL back to its roots in powering web applications, and now Drizzle can be used as a replacement for MySQL.
To create Drizzle, the developers removed non-essential code from MySQL and then re-factored the code that remained. They simultaneously migrated that code to C++, so that Drizzle is focused on having a modular architecture. Because much of the functionality is outsourced to modules, they can be more easily replaced or improved as the software develops.