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In this paper we are interested in mixed hard/soft real-time fault-tolerant applications mapped on distributed heterogeneous architectures. We use the Earliest Deadline First (EDF) scheduling for the hard real-time tasks and the Constant Bandwidth Server (CBS) for the soft tasks. The bandwidth reserved for the servers determines the quality of service (QoS) for soft tasks. CBS enforces temporal isolation,...
Because fault failures tend to affect whole areas, in some cases, and not only individual computers, we propose a new, efficient scheduling algorithm for problems in which tasks with precedence constraints and communication delays have to be scheduled on a virtual heterogeneous distributed multi areas system subject to the possibility of one complete area failure. Based on an extension of the critical-path...
We consider a self-managing, self-organizing pool of virtualized computer servers that provides infrastructure as a service (IaaS) for enterprise computing workloads. A global controller automatically manages the pool in a top down manner by periodically varying the number of servers used and re-assigning workloads to different servers. It aims to use as few servers as possible to minimize power usage...
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