We investigate two types of fault tolerant units (FTU’s) suitable for dependable distributed control systems and numerically evaluate their reliability and mean time to failure (MTTF). A simple simulation-based methodology to numerically evaluate dependability functions of a wide variety of fault tolerant units is presented. The method is based on simulation of stochastic Petri Nets. A set of 1...

An accurate estimate of host reliability is important for correct analysis of many fault-tolerance and replication mechanisms. In a previous study, we estimated host system reliability by querying a large number of hosts to find how long they had been functioning, estimating the mean timeto-failure (MTTF) and availability from those measures, and in turn deriving an estimate of the mean time-to...

This article presents a new approach for system-level reliability management technique for multi-core microprocessors. In the new approach, the electromigration (EM) induced mean time to failure (MTTF) at the system level is modeled as a resource, which is abstracted from a more physics-based EM model. Based on such resource-based EM models, we propose a novel task migration method to explicitl...

The distributed system is a paradigm in which the components can communicate by means of the interface connected between them. The interaction between the components takes place in order to achieve a common goal. The reliability metrics is used to evaluate the performance of the components which is connected by the distributed systems. The Mean Time Between Failure (MTBF), Mean Time to Repair (...

Technology scaling leads to the reliability issue as a primary concern in Networks-on-Chip (NoC) design. Due to routing algorithms, some routers may age much faster than others, which become a bottleneck for system lifetime. In this chapter, lifetime is modeled as a resource consumed over time. A metric lifetime budget is associated with each router, indicating the maximum allowed workload for ...

This paper tries to represent a new method for computing the reliability of a system which is arranged in series or parallel model. In this method we estimate life distribution function of whole structure using the asymptotic Extreme Value (EV) distribution of Type I, or Gumbel theory. We use EV distribution in minimal mode, for estimate the life distribution function of series structure and ma...

Exascale systems will bring significant challenges. This work attempts to addresses them through the Many-Task Computing (MTC) paradigm, by delivering data-aware job scheduling systems and fully asynchronous distributed architectures. MTC applications are structured as DAG graphs of tasks, with dependencies forming the edges. The asynchronous nature of MTC makes it more resilient than tradition...

The design of a suitable interconnection network for inter-processor communication is one of the key issues of the system performance. The reliability of these networks and their ability to continue operating despite failures are major concerns in determining the overall system performance. In this paper a new irregular network IASEN (Irregular Augmented Shuffle Exchange Network) has been propo...

In this paper authors have considered a system having three units A, B1 and B2. A is controlled by a controller and B1 and B2 are independent. Two repairmen are involved in repair of the system. One of the repairmen (the first) is the foreman (boss) and the other an assistant (apprentice). Whenever any unit fails, repair is undertaken by boss. If the boss is busy in repairing and at the same ti...