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Cloud services and applications become ever more important for enterprises, which profit from the advantages of scalability, flexibility and the pay-as-you-go model which are offered by Cloud service vendors. One of the most well-known standards in the ...

In general, web service-based processes (WSBP) are distributed and composed of one or more WSBP called component web services (CWS) which are developed and controlled by third parties. Hence, the functional and quality guarantee terms made with the WSBP ...

Software is becoming more complex as it needs to deal with an increasing number of aspects in volatile environments. This complexity may cause behaviors that violate the imposed constraints. A goal of runtime service monitoring is to determine whether ...

We propose a machine learning based framework for building a hierarchical monitoring system to detect and diagnose service issues. We demonstrate its use for building a monitoring system for a distributed data storage and computing service consisting of ...

In a Cloud Computing scenario, cloud services are accessed via Internet and typically there is a communication latency between the service provider and its clients. As a consequence, QoS parameters noticed by the clients (such as service response time) ...

In SOA, composite services depend on a set of partner services to perform their tasks. These partner services may become unavailable because of system and/or network faults, leading to an increased error rate for the composite service. In this paper, we ...

Cloud computing represents at this point the standard delivery method for the infrastructure and platform of next generation applications. The emergence of a wide range of commercial cloud services have changed not only the way code is written and ...

Nowadays, the number of government bodies website used as an information portal is increasing rapidly. However, there are many aspects causing websites could not be accessible as it is intended. To identify the problems LWBA (Light Weight Because ...

Cloud computing is a new paradigm for service-based computing and is gaining popularity. An efficient way for the assurances of the expected service levels in cloud computing is to establish a tailor-made Service Level Agreement (SLA) and to ensure the ...

Cloud Computing builds on the latest achievements of diverse research areas, such as Grid Computing, Service-oriented computing, business process modeling and virtualization. As this new computing paradigm was mostly lead by companies, several ...

Existing approaches for monitoring service-based systems assume that monitor rules are pre-defined and known in advance. However, adaptation of service-based systems may trigger the need to adapt the associated monitor rules in order to verify the ...

The new paradigm for distributed computing over the Internet is that of Web services (WSs). One of the key ideas of this new paradigm is the ability to create value-added Service-Based Applications (SBAs) by composing pre-existing services. Building ...

A value constellation is an economic system of actors exchanging objects of value to satisfy a consumer's need. Its operation is driven by strategic goals, such as shared profit generation and strengthening of long-term business relationships. Its ...

This paper describes a framework that we have developed to integrate proactive SLA negotiation with dynamic service discovery to provide cohesive runtime support for both these activities. The proactive negotiation of SLAs as part of service discovery ...

As availability of web service has become a great concern in SOA, monitoring mechanism is often deployed to detect and recover failures for service composition. While monitoring mechanism could improve the availability to an extent, it may cost more ...

Monitoring of service-based systems is considered an important activity to support service-oriented computing. Monitoring can be used to verify the behavior of a service-based system, and the quality and contextual aspects of the services participating ...

In this paper we propose a framework for proactive SLA negotiation that integrates this process with dynamic service discovery and, hence, can provide integrated runtime support for both these key activities which are necessary in order to achieve the ...

Web services (WS) are gaining popularity for supporting business interactions in cross-organisational distributed business processes. However, current WS specifications mostly concentrate on syntactic aspects. Because multiparty collaborations in ...

Success in the global market has made the adoption of modern management and administration structures of prime importance. The administration of heterogeneous sets of services and applications necessates the use of information technology, which ...