QoS-based Flexibility in Distributed Systems
نویسندگان
چکیده
This paper discusses how to make a distributed object system flexible so as to satisfy the application’s requirement in the change of the system environment. Each object supports other objects with quality of service (QoS). The change of the system is modeled to be the change of QoS supported by the objects. We discuss relations among the operations with respect to QoS, i.e. QoS-based equivalency and compatibility of the operations. By using the QoS-based relations, we newly discuss a QoS-based compensating way to recover from the less qualified state. Finally, we discuss QoS-based replicas of objects.
منابع مشابه
A Mobile Agent Infrastructure for QoS Negotiation of Adaptive Distributed Applications
QoS-aware distributed applications such as certain Multimedia and Ubiquitous Computing applications can benefit greatly from the provision of QoS guarantees from the underlying system and middleware infrastructure. They must avoid execution glitches that affect the user’s perception of the application output. Most research in QoS support for distributed systems focuses on three aspects of QoS m...
متن کاملQuality - based Flexibility in Distributed Systems
This paper discusses how to make a distributed multimedia object system exible so as to satisfy applications' requirements in change of the system environment. The system change is modeled to be the change of not only for types of service but also quality of service (QoS) supported by the objects. A method changes not only the state of the object but also QoS of the state. We discuss new equiva...
متن کاملQuality-Based Flexibility in Distributed Objects
This paper discusses how to make a distributed object system exible so as to satisfy the application's requirement in the change of the system environment. Each object supports other objects with quality of service (QoS). The change of the system is modeled to be the change of not only types of service but also QoS supported by the objects. We discuss equivalency and compatibility relations amo...
متن کاملEffect of Distributed Power-Flow Controller (DPFC) on Power System Stability
Distributed flexible AC- transmission system (D-FACTS) is a recently advanced FACTS device with high flexibility and smaller size. The DPFC can control power flow in transmission lines, regulate bus voltages and it can also enhance stability margin in power grids. Adaptive-neural network-based fuzzy inference system (ANFIS) combines features of artificial neural network and fuzzy controller. Th...
متن کاملQuartz: A QoS Architecture for Open Systems
This paper describes an architecture that provides support for quality of service (QoS) specification and enforcement in heterogeneous distributed computing systems. The Quartz QoS architecture has been designed to overcome various limitations of previous QoS architectures that have constrained their use in heterogeneous systems. These limitations include dependencies on specific platforms and ...
متن کامل