Currently, one of the major contemporary challenges in the design, development and operation of distributed information systems is their energy efficiency. In the case of services, based on distributed systems that do not require simultaneous operation of all system components, it is possible to determine the optimal condition in which all users are provided with the requested resource, and unused components are de-energized. Using of this approach should not impact system fault tolerance. In this article the system fault tolerance is considered from a user´s perspective, allowing you to redefine the concept. During the research it was to formulate a new approach to fault tolerance, and created a model that describes the optimal energy-saving state of a distributed system. On the basis of this model it is possible to create hardware and software that allows to dynamically maintain the system in optimum energy-efficient state.
distributed systems, energy-efficiency, fault-tolerance, load fluctuations, mathematical model
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