François Taïani, Jean-Charles Fabre, and Marc-Olivier Killijian

Towards Implementing Multi-Layer Reflection for Fault-Tolerance

Proceedings of the 33rd IEEE/IFIP International Conference on Dependable Systems and Networks (DSN'03), San Francisco, CA, USA, 22-25 June, pp. 435-444, 2003 (10p.)

Abstract
Third party software is now increasingly used in systems with high dependability requirements. This evolution of system development raises new challenges, in particular regarding the implementation of fault-tolerance. As systems are often built of black-box components, some crucial aspects of their behavior regarding replication cannot be handled. This is also true to some extent for open-source components as mastering their internal behavior is sometimes very tricky (e.g. OS and ORBs). During the last decade reflection has emerged as a very fruitful paradigm for the disciplined management of non-functional aspects, among which fault-tolerance. In this paper we discuss how to apply reflection to multi-layer systems for implementing fault-tolerance in an independent and principled manner. We analyze the connections between the underlying assumptions of fault-tolerance strategies and the different layers of a system. Based on this multi-layer analysis we show how the requirements of a family of replication algorithms can be addressed on a concrete architecture, resulting in what we name Multi-Layer Reflection.

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