Distributed computing technologies development has allowed uniting geographically distributed resources and has provided an opportunity for effective resource intensive problemsolving in various fields of science and technology. At the same time a set of problems, which demands the development of new approaches, taking into account contemporary Internet technologies implementation, has risen. In this paper a problem of workload relocation in distributed computer- aided design system (DCAD) operating in the “fog” environment was considered. The goal of this paper is ontological approach development to workload relocation problem-solving in DCAD taking into account some “fog” environment features. The ontological approach involves an ontological procedure implementation, which allows “filtering” the candidate-nodes, which have insufficient resources for workload relocation. The scientific novelty of this paper is ontological models using for workload relocation problem-solving in DCAD. It allows reducing the number of candidate-nodes in the “fog” for workload relocation, thereby contributing to reduce the time of location process modeling and, consequently, the total time of workload relocation problem- solving is also reduced. The fundamental difference of presented approach is domain knowledge, represented in ontological model, applying for workload relocation problem-solving. The experimental study results have shown the expediency of ontological analysis for workload relocation problem-solving .
