CompOSE|Q-a QoS-enabled customizable middleware framework for distributed computing

Advances in networking, communication, storage and computing technologies coupled with emerging novel application areas is enabling the widespread use of large scale distributed computing systems. These systems exhibit constant evolution as new applications place specialized requirements from the computing and communication infrastructure. Many applications provide QoS (quality of service) parameters that define the extent to which performance specifications such as responsiveness, reliability, availability, security and cost-effectiveness may be violated. These requirements are often implemented via resource management mechanisms in the middleware. We develop a QoS-enabled customizable middleware framework called CompOSE|Q that can safely and effectively manage change in large scale distributed systems. We illustrate how to achieve flexible, safe and efficient composability of resource management services in the middleware layer while ensuring QoS to the application