Software Congestion, Mobile Servers, and the Hyperbolic Model
IEEE Transactions on Software Engineering
OSF DCE: guide to developing distributed applications
OSF DCE: guide to developing distributed applications
Understanding CORBA (Common Object Request Broker Architecture)
Understanding CORBA (Common Object Request Broker Architecture)
Communications of the ACM
OMG overview: CORBA and the OMA in enterprise computing
Communications of the ACM
Evaluating architectures for multithreaded object request brokers
Communications of the ACM
The benefits of CORBA-based network management
Communications of the ACM
Advanced CORBA programming with C++
Advanced CORBA programming with C++
QualProbes: middleware QoS profiling services for configuring adaptive applications
IFIP/ACM International Conference on Distributed systems platforms
Structuring QoS-supporting services with smart proxies
IFIP/ACM International Conference on Distributed systems platforms
IFIP/ACM International Conference on Distributed systems platforms
High performance adaptive middleware for CORBA-based systems
Proceedings of the nineteenth annual ACM symposium on Principles of distributed computing
Performance of CORBA-Based Client-Server Architectures
IEEE Transactions on Parallel and Distributed Systems
Software Bottlenecking in Client-Server Systems and Rendezvous Networks
IEEE Transactions on Software Engineering
Extending CORBA with Specialized Protocols for QoS Provisioning
DOA '99 Proceedings of the International Symposium on Distributed Objects and Applications
Performance Comparison of Architectures for Client-Server Interactions in CORBA
ICDCS '98 Proceedings of the The 18th International Conference on Distributed Computing Systems
Object-oriented components for high-speed network programming
COOTS'95 Proceedings of the USENIX Conference on Object-Oriented Technologies on USENIX Conference on Object-Oriented Technologies (COOTS)
The Realize middleware for replication and resource management
Middleware '98 Proceedings of the IFIP International Conference on Distributed Systems Platforms and Open Distributed Processing
A high-performance end system architecture for real-time CORBA
IEEE Communications Magazine
RTZen: highly predictable, real-time java middleware for distributed and embedded systems
Proceedings of the ACM/IFIP/USENIX 2005 International Conference on Middleware
RTZen: highly predictable, real-time java middleware for distributed and embedded systems
Proceedings of the ACM/IFIP/USENIX 2005 International Conference on Middleware
RTZen: highly predictable, real-time java middleware for distributed and embedded systems
Middleware'05 Proceedings of the ACM/IFIP/USENIX 6th international conference on Middleware
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Middleware provides inter-operability and transparent location of servers in a heterogeneous distributed environment. A careful design of the middleware software is required, however, for achieving high performance. This research proposes an adaptive middleware architecture for CORBA-based systems. The adaptive middleware agent that maps an object name to the object reference has two modes of operations. In the handle-driven mode, it returns a reference for the requested object to the client that uses this reference to re-send the request for the desired operation to the server, whereas in the forwarding mode it forwards the entire client request to the server. The server upon invocation performs the desired operation and returns the results to the client. An adaptive ORB dynamically switches between these two modes depending on the current system load. Using a commercial middleware product called Orbix-MT, we have implemented a skeletal performance prototype for the adaptive ORB. Based on measurements made on a network of workstations and a synthetic workload we observe that the adaptive ORB can produce a significant benefit in performance in comparison to a pure handle-driven or a pure forwarding ORB. Our measurements provide valuable insights into system behavior and performance.