Title :
A framework for QoS management
Author :
Contreras, José Lino ; Sourrouille, Jean Louis
Author_Institution :
Inst. Nat. des Sci. Appliquees, Villeurbanne, France
Abstract :
Quality of service (QoS) becomes an important issue as systems become more open and therefore less predictable. In such contexts, it is difficult, using static approaches, to ensure that a system will provide the expected QoS. In dynamic approaches, services are adapted to provide the best QoS according to the execution context. This article describes an object-based framework to deal with QoS in domains in which temporal faults are a major QoS criterion. The QoS optimization policy influences most of the architectural design decisions. The implementation is based on meta-objects that collectively manage the QoS and form a two-level decision framework: at the global level, objects share the same decision policy, aiming to reduce timing faults, while at the object level, any specific QoS criteria may be applied. The QoS description is made using UML extension mechanisms. Finally, the main phases of QoS management are detailed: prediction, establishment and operation, including observation and negotiation
Keywords :
distributed object management; meta data; object-oriented methods; open systems; quality of service; timing; QoS management framework; QoS optimization policy; UML extension mechanisms; architectural design decisions; dynamic service adaptation; establishment phase; execution context; global level; meta-objects; negotiation; object-based framework; observation; open systems; operational phase; predictability; prediction phase; service quality; shared decision policy; temporal faults; timing faults; two-level decision framework; Availability; Context-aware services; Delay; Design optimization; Distributed computing; Proposals; Quality of service; Resource management; Timing; Unified modeling language;
Conference_Titel :
Technology of Object-Oriented Languages and Systems, 2001. TOOLS 39. 39th International Conference and Exhibition on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-7695-1251-8
DOI :
10.1109/TOOLS.2001.941672