DOORS: Towards high-Performance Fault-Tolerant CORBA

(Title was originally Measuring the Impact of Fault-Tolerant CORBA on the Performance of Distribtued Systems) Recently, there has been a significant trend towards developing distributed systems based on distributed object computing middleware, such as CORBA. Applications for these systems increasingly require the underlying middleware, operating systems, and networks to provide end-to-end quality of service (QoS) support to enhance their efficiency, predictability, scalability, and fault tolerance. The Object Management Group (OMG), which standardizes CORBA, has addressed these application requirements recently by standardizing the Real-time CORBA and Fault-tolerant CORBA specifications. This paper provides three contributions to research on fault-tolerant CORBA middleware for performance-sensitive applications.