Підхід до управління якістю ІТ-послуг в ІТ-інфраструктурі на основі логічних об’єктів управління з потенційним часом звільнення

Abstract

An approach to the management of the quality of IT services in the IT infrastructure based on the abstraction of the real components of the IT infrastructure and bringing the latter to the logical objects of management and the use of expected release time parameter is proposed. This additional parameter of the distribution of incoming requests is one of the known properties of the control object, despite the fact that it remains a random variable. The application of such an approach to management is possible with a minimum number of components responsible for processing or calculation without the need to clarify their internal structure, but only by summarizing their relationship and the characteristics of input and output effects. In addition, to study the effectiveness of the proposed approach, a simplified model of IT infrastructure was developed using the simmer tool for modeling discrete events. The simplified model allowed to compare the available methods of re-source allocation, among which were: random, circular, the method of choosing the shortest queue. At the highest level, an improved way of selecting computing resources was proposed. The relationship between the time during which the resource was loaded and the relative availability of the resource was used as an objective function for improvement. The application of such objective function has increased the performance of the IT infrastructure from the perspective of relation between finished requests and total requests. In summary, the proposed method takes into account three components: the time of employment of the resource, the computational potential and the waiting potential, while the computational potential is con-sidered with higher priority.