Automatic analytical tools for reliability and dynamic adaptation of complex distributed systems

Abstract

The key to simplifying development and execution of large and complex distributed systems is provzding adequate development environment and runtime facilities for supporting cooperation, reliabzlity and dynamic adaptation. This paper focuses on analytical tools that assist in development of complex systems. The environment allows scalable specification of complex application behavior using mechanisms for abstracting group behavior and hierarchical composition of components. Behavior specification of applications can be analyzed automatically for two classes of problems: (1) reachability and liveness, and (2) consistency during failure recovery and dynamic adaptation. Consistency is preserved by automatically analyzing dependencies from behavior specification. This approach permits components of a complex system to cooperate in complex ways, and execute continuously for a long time with minimal disruption, despite failure or adaptation of some components.

On Monitoring and Self-Adaptation to Dynamic Nature of SOA in ReServE Environment

“…Adaptation to a changing load is a non-trivial issue, which has been considered in many systems of various characteristics [3,15,16]. The existing approaches have to be tailored to SOA features and ReServE requirements.…”

“…If such module is not available, or it is overloaded and does not allow the registration, CIM starts the process of election of the new default RM U module. For this purpose, CIM contacts with M 3 Managers and retrieves the value of the chosen load metric (lines [13][14][15][16][17][18]. Out of the obtained values the minimal one is chosen (line 20).…”