Frank Siqueira and Vinny Cahill., Delivering QoS in open distributed systems., Proceedings of the 7th IEEE Workshop on Future Trends of Distributed Computing Systems (FTDCS '99), 7th IEEE Workshop on Future Trends of Distributed Computing Systems (FTDCS '99), December, IEEE Computer Society,, 1999, 185-190.
This paper describes an architecture that provides
support for quality of service (QoSj in open systems. The
Quartz QoS architecture aims to avoid the dependency on
specific plarforms that limits the application of most
existing QoS architectures in open, heterogeneous and
distributed systems. Quartz adopts a jlexible and
extensible platform-independent design that allows its
internal components to be rearranged dynamically,
adapting the architecture to the surrounding environment
in order to accommodate the diflerences among diverse
computing platforms. Further significant problems found
in other QoS architectures, such as the lack of transparency,
flexibility and expressiveness in the specification of
QoS requirements and limited support for resource
adaptation, are also addressed by Quartz. This paper
compares Quartz to other QoS architectures found in the
literature, presents a prototype implementation of Quartz,
and shows how Quartz is integrated with CORBAto form a
framework for control and transfer of streaming media.
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