Replica Management in Real-Time Ada Applications
Ref: HURRAY-TR-9906 Publication Date: 8, Mar, 1999
Replica Management in Real-Time Ada ApplicationsRef: HURRAY-TR-9906 Publication Date: 8, Mar, 1999
In this paper, we present some of the fault tolerance management mechanisms being implemented in the Multi-µ architecture, namely its support for replica non-determinism. In this architecture, fault tolerance is achieved by node active replication, with software based replica management and fault tolerance transparent algorithms. A software layer implemented between the application and the real-time kernel, the Fault Tolerance Manager (FTManager), is the responsible for the transparent incorporation of the fault tolerance mechanisms. The active replication model can be implemented either imposing replica determinism or keeping replica consistency at critical points, by means of Interactive Agreement mechanisms. One of the Multi-µ architecture goals is to identify such critical points, relieving the underlying system from performing the Interactive Agreement in every Ada dispatching point.
9th International Real-Time Ada Workshop (IRTAW '99), ACM Ada Letters, 19, 2, pp 21-27.
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