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Fail-awareness: an approach to construct fail-safe applications

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2 Author(s)
Fetter, C. ; Dept. of Comput. Sci. & Eng., California Univ., San Diego, La Jolla, CA, USA ; Cristian, F.

We present a framework for building fail-safe hard real-time applications on top of an asynchronous distributed system subject to communication partitions, i.e. using processors and communication facilities whose real-time delays cannot be guaranteed. The basic assumption behind our approach is that each processor has a local hardware clock that proceeds within a linear envelope of real-time. This allows to compute an upper bound on the actual delays incurred by a particular processing sequence or message transmission. Services and applications can use these computed bounds to detect when they cannot guarantee all their properties because of excessive delays. This allows an application to detect when to switch to a fail-safe mode.

Published in:

Fault-Tolerant Computing, 1997. FTCS-27. Digest of Papers., Twenty-Seventh Annual International Symposium on

Date of Conference:

24-27 June 1997