P. Pochec and W. Mardini (Canada)
fault tolerance, parallel and distributedsystem modelling, queueing theory.
Backup system latency is a serious problem in real time FT
systems. We propose an analytical model of a dual
processor system (mirroring) that explains and quantifies
random delays in response time of the backup system. The
proposed queueing model accounts for Poissonian demand,
and random and constant processing times. The model
permits to balance the cost (speed) of the backup system
and the expected backup system latency.