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Adaptive Fault Tolerance and Graceful Degradation Under Dynamic Hard Real-time Scheduling (1997)
| Content Provider | CiteSeerX |
|---|---|
| Author | Gonzalez, Oscar Shrikumar, Oscar Gonzalez Stankovic, John A. Ramamritham, Krithi |
| Description | Static redundancy allocation is inappropriate in hard realtime systems that operate in variable and dynamic environments, (e.g., radar tracking, avionics). Adaptive Fault Tolerance (AFT) can assure adequate reliability of critical modules, under temporal and resources constraints, by allocating just as much redundancy to less critical modules as can be afforded, thus gracefully reducing their resource requirement. In this paper, we propose a mechanism for supporting adaptive fault tolerance in a real-time system. Adaptation is achieved by choosing a suitable redundancy strategy for a dynamically arriving computation to assure required reliability and to maximize the potential for fault tolerance while ensuring that deadlines are met. The proposed approach is evaluated using a real-life workload simulating radar tracking software in AWACS early warning aircraft. The results demonstrate that our technique outperforms static fault tolerance strategies in terms of tasks meeting their timin... |
| File Format | |
| Language | English |
| Publisher Date | 1997-01-01 |
| Access Restriction | Open |
| Subject Keyword | Dynamic Hard Real-time Scheduling Radar Tracking Awacs Early Warning Aircraft Real-time System Resource Constraint Adaptive Fault Tolerance Suitable Redundancy Strategy Graceful Degradation Critical Module Hard Realtime System Resource Requirement Adequate Reliability Much Redundancy Dynamic Environment Real-life Workload Static Redundancy Allocation Static Fault Tolerance Strategy Fault Tolerance |
| Content Type | Text |
| Resource Type | Article |
