Traditionally, network Service Providers specify Service Level Agreements (SLAs) to guarantee service availability and performance to their customers. However, these SLAs are rather static and span a single provider domain. Thus, they are not applicable to a multi–domain environment. In this paper, the authors present a framework for automatic creation and management of SLAs in a multi-domain environment. The framework is based on Service Oriented Computing (SOC) and contains a collection of web service calls and modules that allow for the automatic creation, configuration, and delivery of an end-to-end SLA, created from the merging of the per-domain SLAs. This paper also presents a monitoring procedure to monitor the QoS guarantees stipulated in the SLA. The SLA establishment and monitoring procedures are tested through a Grid application scenario targeted to perform remote control and monitoring of instrument elements distributed across the Grid.
Security in grid environments that are built using Service Oriented Architecture (SOA) technologies is a great challenge. On one hand, the great diversity in security technologies, mechanisms and protocols that each organization follows and on the other hand, the different goals and policies that these organizations adopt, comprise a complex security environment. Authenticating and authorizing users and services, identity management in a multi-organizational scenario and secure communication define the main context of the problem. In this chapter, we provide an overview of the security protocols and technologies that can be applied on a Web Service (WS) based grid environment.
Traditionally, network Service Providers specify Service Level Agreements (SLAs) to guarantee service availability and performance to their customers. However, these SLAs are rather static and span a single provider domain. Thus, they are not applicable to a multi–domain environment. In this paper, the authors present a framework for automatic creation and management of SLAs in a multi-domain environment. The framework is based on Service Oriented Computing (SOC) and contains a collection of web service calls and modules that allow for the automatic creation, configuration, and delivery of an end-to-end SLA, created from the merging of the per-domain SLAs. This paper also presents a monitoring procedure to monitor the QoS guarantees stipulated in the SLA. The SLA establishment and monitoring procedures are tested through a Grid application scenario targeted to perform remote control and monitoring of instrument elements distributed across the Grid.
The proliferation and integration of communication networks in social life has increased the need for trusted systems of advanced and intelligent capabilities. Future networks are calling for new ways to efficient management, operation and service provisioning. Autonomicity becomes an enabler for selfmanageability of future networks and therefore autonomic networking provides the necessary new paradigm for these networks to become manageable and scalable. Autonomic entities base their decision within a network on experience gathered and information exchanged. Trust management mechanisms can provide the necessary security framework in such an environment towards robust coherent autonomic networking. In this paper we present trust models and sketch a trust management architecture, applicable to complex future networking environments. We handle the special requirements set by autonomicity and try to strengthen the autonomic characteristics of the nodes as well as the robustness of service provisioning.
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