Helmut Wanek

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Across a wide variety of fields, huge datasets are being collected and accumulated at a dramatical pace. The datasets addressed by individual applications are very often heterogeneous and geographically distributed. An important factor of the strength of a modern enterprise is its capability to effectively store and process information. As a legacy of the(More)
Automatic construction of workflows on the Grid currently is a hot research topic. The problems that have to be solved are manifold: How can existing services be integrated into a workflow, that is able to accomplish a specific task? How can an optimal workflow be constructed in respect to changing resource characteristics during the optimization process?(More)
In 2004 we have launched the Business In the Grid (BIG) project to, firstly, make business aware of Grid technology and, secondly, try to explore new business models. Personal interviews and an online survey were done to gain dissemination of Grid computing and collect information about the possibilities and challenges of business in the Grid. In this paper(More)
Introduction 1 Two factor8 8trongly inftuenced the re8earch in high performance computing in the la8t few year8, the 1/0 bottleneck and clu8ter 8y8tem8. Fir8tly, for many 8upercomputing application8 the limiting factor i8 not the number of available CPU8 anymore, but the bandwidth of the di8k 1/0 8y8tem. Secondly, a 8hift from the cla88ical, co8tly(More)
Composing grid services to workflows, which solve specific problems is not a trivial task. Various parameters like for example timing constraints, desired quality of solution, availability of (computing) resources, error recovery, payment and security issues, to name only a few, have to be considered. The heterogeneity and the highly dynamic nature of the(More)