Infrastructure
An Orchestra installation can operate in two modes: standalone or cluster. Furthermore it is possible to use the cell system in both operation modes. The cell system is a network of independent Orchestra systems that can be used to invoke service calls and send signals over different Orchestra instances. The cell system is location transparent. Therefore a designer must not care about the fact when designing a scenario.
If Orchestra is working in standalone mode, exactly one Orchestra runtime is responsible for execution of the modeled scenarios. When working as a cluster, Orchestra is working in high availability mode. In this setup Orchestra has different physical runtimes that serve together a set of deployed scenarios. For both operation modes the cell system can be used.