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SLA-Driven Clustering of QoS-Aware Application Servers

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4 Author(s)
Lodi, G. ; Dept. of Comput. Sci., Bologna Univ. ; Panzieri, F. ; Rossi, D. ; Turrini, E.

In this paper, we discuss the design, implementation, and experimental evaluation of a middleware architecture for enabling service level agreement (SLA)-driven clustering of QoS-aware application servers. Our middleware architecture supports application server technologies with dynamic resource management: application servers can dynamically change the amount of clustered resources assigned to hosted applications on-demand so as to meet application-level quality of service (QoS) requirements. These requirements can include timeliness, availability, and high throughput and are specified in SLAs. A prototype of our architecture has been implemented using the open-source J2EE application server JBoss. The evaluation of this prototype shows that our approach makes possible JBoss' resource usage optimization and allows JBoss to effectively meet the QoS requirements of the applications it hosts, i.e., to honor the SLAs of those applications

Published in:

Software Engineering, IEEE Transactions on  (Volume:33 ,  Issue: 3 )

Date of Publication:

March 2007

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