Metody ověřování mechnismu vstupního řízení real-time databázového systému s použitím jeho experimentálního modelu

Abstract

The main issue related to transaction planning and execution in real-time database system is based on the fact that we are not able to determine system resources for transactions execution in advance. A primary motivation of this work is a gap in real-time database research, especially in area of admission control mechanisms used feedback control strategy. The main purpose of an admission control mechanism is to control a system utilization and to avoid system saturation or provide correction steps if the system is overloaded. It is necessary to highlight that admission control protocols used in real-time database system require really specific approach. It means that well-known mechanisms from classic real-time system are not fully applicable in the real-time database area. In this thesis has been introduced and described an improved experimental real-time database system, called Testbed. The system has been developed on RTX real-time platform and it is focused on testing purposes mainly. Suggested mechanism of admission control has been tested and compared with well known approaches. We can proclaim that research conclusions were verified on an existing real-time database platform.