The QoSMA architecture supports the addition and removal of Web
services according to demand variation. This will allow each server to implement its replication
policies that suit its objectives and the particularities of each type of Web services. The
QoSMA architecture can also be extended to a federation of brokers where a QoS broker is
deployed, for example, within an organizational domain. These brokers may exchange QoS
information about servers within their domains and cooperate to achieve the management
operations we describe in Management operations in QoSMA.
Evaluation.and.Discussions.
To develop components of QoSMA architecture, we are using WebLogic platform 8.1 with
service pack 2, which includes the application server and the development environment
(workshop) (BEA WebLogic platform, 2003). We store data generated from the execution
of operations performed by the QoSMA components in Oracle Database version 9i (Oracle
Database, 2004). The Weblogic platform supports, in addition to other functions, the scalability
function since it allows dynamic instantiation and management of more than one
instance of servers. Components of the QoSMA which have been completely implemented
Serhan , Bad d , & Mohamed-Salem
Copyright ?© 2007, Idea Group Inc.
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