In this section we give a detailed description of the architecture of a cloud DBMS. The main focus is in
SCALE DB, which is a storage engine that is pluggable and compatible with MySQL applications and tools.
SCALE DB works on that way that nodes are clustered, and each node in the cluster has access to the entire
database. On increased load, additional nodes can be added to increase the scalability and performance. The
following figure shows the SCALE DB architecture, which is based on general architecture principles used by cloud
DBMS.