A scheduling algorithm for parallel tasks in peer-to-peer systems
ICCSA'06 Proceedings of the 2006 international conference on Computational Science and Its Applications - Volume Part II
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A Grid is computer-based infrastructur that providesdependable, consistent, pervasive access to distributedresources. Built on top of a Grid, a Semantic Grid is aservice-oriented infrastructure that provides a range ofcomputation, information and knowledge services. A purposeof a Grid portal is to provide easy and seamless access toGrid heterogeneous resources and services through a Web-based user interface. This paper presents PortalLab, a WebServices oriented toolkit for designing, integrating andbuilding Semantic Grid portals. Portals built from PortalLabare composed from a collection of reusable Web Servicesoriented portlets that are themselves semantic Grid services.Each portlet has a WSDL interface and a semantic registrydefined in a domain ontology repository. The use of softwareagents assists end users in formulating domain problems,searching possible solutions (solvers) and submitting usertasks to the Grid. Multiple agents work in a peer-to-peerenvironment to allow us rs to access federated Grid servicesacross different domains to improve fault toleranc andquality of service in user job submission and execution onth Grid. Since portlets are context independent, a PortalLabportal provides the ability to interoperate with different Gridsystems at a portal level.