Qualis: the quality of service component for the Globus metacomputing system

General computing over a widely distributed set of heterogeneous machines-typically called metacomputing-offers definite advantages. The notion of quality of service (QoS) for metacomputing is very important. This paper presents Qualis, the QoS component for the Globus metacomputing system. We present the Qualis architecture, how it is integrated into the Globus architecture, and how it addresses QoS in a metacomputing environment.