SLA-Driven Management of Distributed Systems Using the Common Information Model

Abstract

Abstract:Keywords:We present a novel approach of using CIM for the SLA-driven management of distributed systems and discuss our implementation experiences. Supported 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 term business relationships across different service provider boundaries. Such dynamic structures will only be successful if the obligations of different providers with respect to the quality of the offered services can be unambiguously specified and enforced by means of dynamic Service Level Agreements (SLAs). In other words, the management of SLAs needs to become as dynamic as the underlying infrastructure for which they are defined.Our previous work has shown that Web Services, as a typical example for a serviceoriented architecture, can be extended in a straightforward way for defining and monitoring SLAs. However, SLAs defined for a Web Services environment need to take into account the underlying managed resources whose management interfaces are defined based on traditional management architectures, such as SNMP-based management or the Common Information Model (CIM). As a solution to this problem, the approach presented in this paper addresses the integration problem of how to transform a Web Services SLA so that it can be understood and enforced by a service provider whose management system is based on a traditional management architecture, such as CIM.SLA, Web Services, Common Information Model, Inter-Domain Management

Definition of Metric Dependencies for Monitoring the Impact of Quality of Services on Quality of Processes

“…For the integration of the developed components with established management approaches, [13] defines a mapping between SLAs and CIM. Although, these components are needed for monitoring SLA compliance, a method for modeling and defining calculable metric dependencies is out of scope.…”

“…Therefore, the CIM metrics model [9], [13] was related to functional dependencies of the ToR generating process and the StudentDBService as defined in Section III. Additionally, metric dependencies as well as dependency functions have been extended.…”

Code generation for WSLAs using AXpect

“…First, XIP-level aspect specification is required in any case, since Spi is translated into XIP. Second, there is no standard WSLA specification language -competing standards include CDL from the QuO project [5], and proposals by HP [2] and IBM [1].…”

Aggregation of Composite Location-Aware Services for Mobile Cellular Networks

“…They contain information about Acceptable Service Response Time, Guaranteed Network QoS between the aggregated service and the composite service, cost of using the service, Unit of Work definitions etc. [8,9,10]. They are used in the framework to ensure that the performance of any single composite service does not hinder the overall performance of the aggregated service.…”