Middleware is increasingly used as the infrastructure for applications with stringent quality of service (QoS) requirements, including scalability. One way to improve the scalability of distributed applications is to use adaptive middleware to balance system processing load dynamically among multiple servers. Adaptive middleware load balancing can help improve overall system performance by ensu...

Multimedia services such video-on-demand service to large number of clients require stable network bandwidth provision and short network delay. In order to achieve these goals, the object replication in overlay P2P networks in a good candidate solution for both service providers and customers. However, the characteristics of peers are different from traditional content distribution infrastructu...

The spread of wireless portable devices is pushing towards service provisioning over dense Mobile Ad-hoc NETworks (MANETs), i.e., limited spatial regions, such as shopping malls and airports, where a high number of mobile peers can autonomously cooperate without a statically deployed network infrastructure. The paper proposes the REDMAN middleware to manage, retrieve, and disseminate replicas o...

Technology can play a significant role in the management and coordination activities of special operations such as emergency response, military combat missions, forest firefighting, etc. Mobile ad hoc networks (MANETs) can be used quite effectively to manage resource sharing in such operations due to their flexibility and ease of establishment. The concept of service discovery has some appealin...

A recent trend in modern high performance computing (HPC) system architectures employs “lean” compute nodes running a lightweight operating system (OS). Certain parts of the OS as well as other system software services are moved to service nodes in order to increase performance and scalability. This paper examines the impact of this HPC system architecture trend on HPC “middleware” software sol...

Mobile computing is characterised by users carrying portable devices that allow communication between people and continuous access to networked services independent of their physical location. A mobile application must discover and interoperate with the required application services available to them in their present location. However, these services will be developed upon a range of middleware...

This dissertation provides constructive proof, through the implementation of a middleware, that distribution transparency is practical, generic, and extensible. Fault tolerant distributed services can be developed by using the failure detection abilities of the middleware. By generic we mean that the middleware can be used for many different programming languages and paradigms. Distribution for...

Interoperability remains a significant challenge in today’s distributed systems; it is necessary to quickly compose and connect (often at runtime) previously developed and deployed systems in order to build more complex systems of systems. However, such systems are characterized by heterogeneity at both the application and middleware-level, where application differences are seen in terms of inc...