The software tools that allow to model and simulate the process of task scheduling in large computer networks and distributed computer systems are analyzed. It is reasonably stated why there is a need to develop a new software package. A brief description of the new approach proposed by the author to solve the problem of planning and method of task flow scheduling, given the inalienability of computing resources from their owner and the fact that the system can use different properties and characteristics of software and hardware, whether clusters, supercomputers, personal computers, laptops, etc. A software package has been developed that allows simulating the operation of a geographically distributed computer system with inalienable resources, as well as observing and investigating the behavior of different algorithms under different conditions. Describes the architectural model of the developed simulator, its main functions and possibilities of use not only for the analysis of scheduling algorithms, but also in educational process, thanks to presence of the intuitively clear and interactive graphic interface allowing to observe process of distributed calculations on system nodes.
scheduling algorithms, GRID-system, GRID simulator, distributed computing, flows scheduling.
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