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I. Ul Haq, I. Brandic, E. Schikuta:
"SLA Validation in Layered Cloud Infrastructures";
Vortrag: Economics of Grids, Clouds, Systems, and Services 7th International Workshop, GECON 2010, Ischia, Italy; 31.08.2010; in: "Economics of Grids, Clouds, Systems, and Services Proceedings of the 7th International Workshop, GECON 2010", J. Altmann, O. Rana (Hrg.); Springer, LNCS 6296 (2010), ISBN: 978-3-642-15680-9; S. 153 - 164.

Cloud computing brings in a novel paradigm to foster ITbased
service economy in scalable computing infrastructures by allowing
guaranteed on-demand resource allocation with flexible pricing models.
Scalable computing infrastructures not only require autonomous management
abilities but also the compliance to users´ requirements through
Service Level Agreements (SLAs). Such infrastructures should automatically
respond to changing components, workload, and environmental
conditions as well as prevent violations of agreed SLAs. The essential requirements
for SLA-based orchestration of services include agile
component-based infrastructure to support these orchestrations; proactive
validation of SLAs to prevent violations; and business enabling requirements
including trust, privacy and breach management to address
penalty enforcement, renegotiation and recovery. In this paper we outline
a systematic approach that weaves together three different SLA management
models, which cater the above mentioned issues by localizing and
addressing them at different but interrelated scopes pertaining to resource,
infrastructure, and business domains. In our framework Cloud
components (e.g., meta negotiator, broker, automatic service deployer)
are loosely coupled using SLAs and can be exchanged on demand considering
current load, systems failures, and the whole Cloud ecosystem.
Thereafter, SLAs are validated based on high level goals (e.g., business
rules, VO policies) ensuring trust, privacy, and breach management in
layered Cloud infrastructures.

Projektleitung Ivona Brandic:
Foundations of Self-governing ICT Infrastructures