Verlag des Forschungszentrums Jülich
JUEL-4154
Riedel, Morris
Prospects and Realization of Flexible Service Offers in a Grid Environment
VI, 159 S., 2004
This thesis aims at the process of flexible service offering and negotiation aspects to reach an
agreement between service providers and service customers in Grid environments . At first, a
general introduction to this process is given to identify the necessity for formal descriptions
and work-flow in these processes. For a realization of such processes, concepts of servicebased
Grid architectures are analyzed that lead to the Grid Service technology and to special
languages for service characteristics, including Service Level Agreement (SLA) parameters and
Quality of Service (QoS) issues. The complexity of such service characteristics and their precise
realization as services are the main goal of a whole working group of the Global Grid
Forum (GGF) which leads the global standardization effort for Grid computing. So the specifications
and the work of this Grid Resource Allocation Agreement Protocol (GRAAP) working
group are the core of this thesis, enlarged with domain-specific requirements to create several
prototypes addressing the switching of network connections.
Because this thesis also focuses on a realization of flexible service offers in a Grid environment,
many technology frameworks are considered to find the best choice for now. Therefore,
this thesis gives an overview of many currently available Web Services Resource Framework
(WSRF) hosting environments to make a substantiated choice for creating WSRF compliant
prototypes.
This thesis evolves a WSRF compliant design of an agreement factory and agreement service.
There are also interoperable prototypes implemented and discussed but beside this a different
approach, concerning the differentiated view of factory and resource is introduced. The
complete realization of a working Grid Service application is out of the scope of this thesis.
Conclusions sum up the cognitions compiled out of the prototype implementations and future
work, concerning security aspects and persistent agreements, is described.
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