Flexis-I: a dynamic configuration model for distributed scheduling systems

The authors present a dynamic configuration tool for the construction of distributed scheduling system. Flexis-I provides abstraction for interprocess communication. This model depicts two levels: the configuration level, and the scheduler level. The configuration level knows only one component (i.e. the scheduler), and defines the structure of a distributed scheduling system by creating, removing, and interfacing schedulers on a network. The scheduler level is concerned with defining the external interface of a scheduler, that is port specifications, and intercommunication primitives. Flexis-I hides the underlying hardware and networking communications, and guides the designer towards writing configurable distributed scheduling systems. The use of scheduler level primitives in designing schedulers ensures interconnection independence, which is a key property into supporting dynamic configuration