Gara: A Uniform Quality of Service Architecture

Abstract

Many Grid applications, such as interactive and collaborative environments, can benefit from guarantees for resource performance or quality of service (QoS). Although QoS mechanisms have been developed for different types of resources, they are often difficult to use together because they have different semantics and interfaces. Moreover, many of them do not allow QoS requests to be made in advance of when they are needed. In this chapter, we describe GARA, which is a modular and extensible QoS architecture that allows users to make advance reservations for different types of QoS. We also describe our implementation of network QoS in detail.