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Real-time dependable channels: customizing QoS attributes for distributed systems

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5 Author(s)
M. A. Hiltunen ; Dept. of Comput. Sci., Arizona Univ., Tucson, AZ, USA ; R. D. Schlichting ; Xiaonan Han ; M. M. Cardozo
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Communication services that provide enhanced Quality of Service (QoS) guarantees related to dependability and real time are important for many applications in distributed systems. This paper presents real-time dependable (RTD) channels, a communication-oriented abstraction that can be configured to meet the QoS requirements of a variety of distributed applications. This customization ability is based on using CactusRT, a system that supports the construction of middleware services out of software modules called micro-protocols. Each micro-protocol implements a different semantic property or property variant and interacts with other micro-protocols using an event-driven model supported by the CactusRT runtime system. In addition to RTD channels CactusRT and its implementation are described. This prototype executes on a cluster of Pentium PCs running the OpenGroup/RI MK 7.3 Mach real-time operating system and CORDS, a system for building network protocols based on the x-kernel

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IEEE Transactions on Parallel and Distributed Systems  (Volume:10 ,  Issue: 6 )