Contract-driven creation and operation of virtual enterprises
Computer Networks: The International Journal of Computer and Telecommunications Networking
Supporting Service Level Agreements on IP Networks
Supporting Service Level Agreements on IP Networks
Managing Business and Service Networks
Managing Business and Service Networks
The Role of Contract and Component Semantics in Dynamic E-Contract Enactment Configuration
Proceedings of the IFIP TC2/WG2.6 Ninth Working Conference on Database Semantics: Semantic Issues in E-Commerce Systems
The Management of Business Transactions through Electronic Contracts
DEXA '99 Proceedings of the 10th International Workshop on Database & Expert Systems Applications
Relevant Past Performance for Selecting Web Services
QSIC '05 Proceedings of the Fifth International Conference on Quality Software
A fuzzy model for reasoning about reputation in web services
Proceedings of the 2006 ACM symposium on Applied computing
Autonomous service level agreement negotiation for service composition provision
Future Generation Computer Systems
Proceedings of the 3rd international workshop on Services integration in pervasive environments
Supporting Evidence-Based Compliance Evaluation for Partial Business Process Outsourcing Scenarios
RELAW '08 Proceedings of the 2008 Requirements Engineering and Law
A hybrid connector for efficient web servers
International Journal of High Performance Computing and Networking
Monitoring probabilistic properties
Proceedings of the the 7th joint meeting of the European software engineering conference and the ACM SIGSOFT symposium on The foundations of software engineering
An agent negotiation approach for establishment of service level agreement
CSCWD'06 Proceedings of the 10th international conference on Computer supported cooperative work in design III
Service level agreements: web services and security
ICWE'07 Proceedings of the 7th international conference on Web engineering
Customer service management for grid monitoring and accounting data
DSOM'07 Proceedings of the Distributed systems: operations and management 18th IFIP/IEEE international conference on Managing virtualization of networks and services
Verity: a QoS metric for selecting Web services and providers
WISEW'03 Proceedings of the Fourth international conference on Web information systems engineering workshops
An effective sequential statistical test for probabilistic monitoring
Information and Software Technology
Pattern-Based specification and validation of web services interaction properties
ICSOC'05 Proceedings of the Third international conference on Service-Oriented Computing
A SLA graph model for data services
Proceedings of the fifth international workshop on Cloud data management
Data center selection based on neuro-fuzzy inference systems in cloud computing environments
The Journal of Supercomputing
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Fueled by the growing acceptance of the Web Services Architecture, an emerging trend in application service delivery is to move away from tightly coupled systems towards structures of loosely coupled, dynamically bound systems to support both long and short business relationships. It appears highly likely that the next generation of e-Business systems will consist of an interconnection of services, each provided by a possibly different service provider, that are put together on an "on demand" basis to offer an end to end service to a customer.Such an environment, which we call Dynamic e-Business (DeB), will be administered and managed according to dynamically negotiated Service Level Agreements (SLA) between service providers and customers. Consequently, system administration will increasingly become SLA-driven and needs to address challenges such as dynamically determining whether enough spare capacity is available to accommodate additional SLAs, the negotiation of SLA terms and conditions, the continuous monitoring of a multitude of agreed-upon SLA parameters and the troubleshooting of systems, based on their importance for achieving business objectives.A key prerequisite for meeting these goals is to understand the relationship between the cost of the systems an administrator is responsible for and the revenue they are able to generate, i.e., a model needs to be in place to express system resources in financial terms. Today, this is usually not the case.In order to address some of these problems, this paper presents the Web Service Level Agreement (WSLA) framework for defining and monitoring SLAs in inter-domain environments. The framework consists of a flexible and extensible language based on the XML schema and a runtime architecture based on several SLA monitoring services, which may be outsourced to third parties to ensure a maximum of accuracy.WSLA enables service customers and providers to unambiguously define a wide variety of SLAs, specify the SLA parameters and the way how they are measured, and tie them to managed resource instrumentations. A Java-based implementation of this framework, termed SLA Compliance Monitor, is publicly available as part of the IBM Web Services Toolkit.