...
Scale-out architecture
Logically, the platform MediationZone platform is layered into three different zones:
- Access Zone is the layer where users access the system through a graphical interface or command line interface to perform operations and maintenance tasks.
- Control Zone hosts configurations and provides storage and a range of services that are essential to the systemthe MediationZone system.
- Execution Zone is a scale-out layer that provides processing capacity in the system. This layer contains one or several Execution Contexts and Service Contexts, which are distributed over any number of servers.
- Execution Contexts are responsible for executing and supervising workflows.
- Service Contexts host services that workflows running in Execution Contexts can share.
...
The Platform, ECs, ECSAs, and SCs run in "containers", that are installed on one or more hosts. Each installation is assigned a container name to identify it uniquely within a systema MediationZone system. One host, physical or virtual, may hold several containers, each one with a unique name and installed in separate home (MZHOME) directories.
...