Dynamic Service Provisioning: A User--Centric Approach

The paradigm shift to service management opens a new dimension in management. In this paper we address the issue of dynamic service provisioning. The vision is that users would be able to review a set of services or service packages, select or customize a package, whereupon a service provider checks the request, clicks an "execute" button, and the services are turned on, monitored and managed. Such a vision is hard to achieve. A first step towards dynamic service provisioning is to develop a framework for a service provisioning system (SPS). The key issues of the framework are (i) the concept of a service template, and (ii) the idea of looking at a service template as a case and applying case-based reasoning method

Self-Healing Systems: Foundations and Challenges

This document summarizes the results of the Working Group 3 - ``Terminology\u27\u27 - at the Dagstuhl Seminar 09201 ``Self-Healing and Self-Adaptive Systems\u27\u27 (organized by A. Andrzejak, K. Geihs, O. Shehory and J. Wilkes). The seminar was held from May 10th 2009 to May 15th 2009 in Schloss Dagstuhl~--~Leibniz Center for Informatics

Evaluation of an Accounting Model for Dynamic Virtual Organizations

Accounting of Grid resource and service usage determines the central support activity for Grid systems to be adopted as a means for service-oriented computing in Dynamic Virtual Organizations (DVO). An all-embracing study of existing Grid accounting systems has revealed that these approaches focus primarily on technical precision, while they lack a foundation of appropriate economic accounting principles and the support for multi-provider scenarios or virtualization concepts. Consequently, a new, flexible, resource-based accounting model for DVOs was developed, combining technical and economic accounting by means of Activity-based Costing. Driven by a functional evaluation, this paper pursues a full-fledged evaluation of the new, generically applicable Grid accounting model. This is done for the specific environment of the Leibniz Supercomputing Centre (LRZ) in Garching, Germany. Thus, a detailed evaluation methodology and evaluation environment is outlined, leading to actual model-based cost calculations for a defined set of considered Grid services. The results gained are analyzed and respective conclusions on model applicability, optimizations, and further extensions are draw