Application QoS management for distributed computing systems

As a large number of distributed multimedia systems are deployed on computer networks, quality of service (QoS) for users becomes more important. This paper defines it as application QoS, and proposes the application QoS management system (QMS). It controls the application QoS according to the system environment by using simple measurement-based control methods. QMS consists of three types of modules. These are a notificator for module detecting QoS deterioration, a manager module for deciding the control method according to the application management policies, and a controller module for executing the control. The QMS manages the application QoS by communicating between these modules distributed on the network. Moreover, this paper especially focuses on the function setting QoS management policies to the QMS and proposes the setting method. By a simulation experiment, we confirmed that the system made it possible to negotiate the QoS among many applications and it was able to manage the whole applications according to the policies