Papers by Michel Drescher
Lecture Notes in Computer Science, 2013
Journal of Grid Computing, 2014
ABSTRACT The European Grid Infrastructure (EGI) is providing a sustainable pan–European Computing... more ABSTRACT The European Grid Infrastructure (EGI) is providing a sustainable pan–European Computing Grid to support e–Science, integrating more than 350 computing resource centers worldwide. One of its main challenges is that the middleware driving this production infrastructure is constantly evolving, as it adapts to the changing needs of the EGI Community. Since the software is provided by external technology providers, it needs to pass through a quality verification process before it is included in the EGI official release called Unified Middleware Distribution (UMD). Therefore, all software components undergo a release process covering the definition of the functionality and quality criteria, the verification of those criteria, and the testing under production environments. This paper details the design, development and implementation of this software validation process. An analysis is performed on several metrics to evaluate the process impact on the stability of the production infrastructure, by capturing malfunctions and other issues at the initial testing phases.
The rapid evolution of the cloud market is leading to the emergence of new services, new ways for... more The rapid evolution of the cloud market is leading to the emergence of new services, new ways for service provisioning and new interaction and collaboration models both amongst cloud providers and service ecosystems exploiting cloud resources. Service Level Agreements (SLAs) govern the aforementioned relationships by defining the terms of engagement for the participating entities. Besides setting the expectations by dictating the quality and the type of service, SLAs are also increasingly considered by the providers as the key differentiator to achieve competitive advantage. In this context, the current report surveys the research outcomes stemming from European and National projects, and discusses how these outcomes address the complete SLA lifecycle. In addition, this report introduces a set of recommendations to support the on-going policy work on SLAs of the Cloud Select Industry Group (SIG), while identifying the research outcomes that can be exploited for the implementation of the recommendations. What is more, the report examines the potential impact of the realization of the listed recommendations in different domains and areas.
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Papers by Michel Drescher