Performability Models for Multi-Server Systems with High-Variance Repair Durations

  title={Performability Models for Multi-Server Systems with High-Variance Repair Durations},
  author={Hans-Peter Schwefel and Imad Antonios},
  journal={37th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DSN'07)},
We consider cluster systems with multiple nodes where each server is prone to run tasks at a degraded level of service due to some software or hardware fault. The cluster serves tasks generated by remote clients, which are potentially queued at a dispatcher. We present an analytic queueing model of such systems, represented as an M/MMPP/1 queue, and derive and analyze exact numerical solutions for the mean and tail-probabilities of the queue-length distribution. The analysis shows that the… CONTINUE READING
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