DocumentCode :
3103430
Title :
QoS-aware discovery of wide-area distributed services
Author :
Xu, Dongyan ; Nahrstedt, Klara ; Wichadakul, Duangdao
Author_Institution :
Dept. of Comput. Sci., Illinois Univ., Urbana, IL, USA
fYear :
2001
fDate :
2001
Firstpage :
92
Lastpage :
99
Abstract :
Global computational grids bring together distributed computation/communication resources. Beyond this, we envision the emergence of global `service grids´, which provide a `market´ of application-level distributed services for clients to discover and to request. We study the issue of wide-area service discovery in service grids. We start with an existing basic wide-area service discovery framework. The framework adopts a scalable architecture consisting of a hierarchy of Discovery Servers. We then identify problems with the basic framework, and propose our enhancement of query responsiveness and QoS awareness. The key techniques we introduce include: (1) the addition of QoS feedback capability to clients; and (2) the caching and propagation of discovery results with QoS feedback in the discovery server hierarchy. With these techniques, the enhanced service discovery framework will be faster in finding qualified service providers. Furthermore, it will select a `good´ (with respect to the QoS to be delivered) service provider for each querying client, based on QoS feedback
Keywords :
client-server systems; information services; quality of service; query processing; wide area networks; Discovery Servers; QoS awareness; QoS feedback; QoS feedback capability; QoS-aware discovery; application-level distributed services; caching; discovery server hierarchy; distributed computation/communication resources; global computational grids; global service grids; qualified service providers; query responsiveness; querying client; scalable architecture; service discovery framework; wide-area distributed services; wide-area service discovery; Computer science; Delay; Distributed computing; Feedback; Frequency; Grid computing; Information management; Laboratories; Quality of service; Quantum cascade lasers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Cluster Computing and the Grid, 2001. Proceedings. First IEEE/ACM International Symposium on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
0-7695-1010-8
Type :
conf
DOI :
10.1109/CCGRID.2001.923180
Filename :
923180
Link To Document :
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