| IT organizations are under increasing pressure to meet the business goals of their companies. Many public and private organizations contributed their knowledge and experience, in one form or another, to the development of Framework of IT Service Management and ITIL(IT Infrastructure Library). ITIL provides a comprehensive, consistent and coherent set of best practices for IT Service Management, promoting a quality approach to achieving business effectiveness and efficiency in the use of information systems.The configuration management database, or CMDB, is an important component of ITIL process and the cornerstone of infrastructure. The difficulty of implementing CMDB is in the complexity of the existing underlying infrastructure. Typically, the relevant data is stored in any number of different systems, often from different vendors. This cross repository data is difficult to interpret and correlate consistently. Mapping, visualizing and maintaining complex cross-repository relationships is very hard.It is essential to set out to develop a specification to simplify sharing this data via federation. Many Software vendors like CA, IBM, HP, BMC is also seeking for a uniformed and widely acknowledged specification for interoperation. Federation can provide the foundation for creating a CMDB that is scalable, adaptable to fit existing IT infrastructures, and addressable by all applications that need to provide or leverage CMDB data. A federated CMDB should provide an accurate, single representation of data from which to work, for all IT processes.This article makes a research on principle and technology of federation Configuration Management Database based on the theory of data aggregation. It mainly discusses about the concept of federation, and how federation be approached in the context of a CMDB. Through the Designing and implementing a Federation CMDB for an information center of large bank, the article amply illustrates the architecture of Federation CMDB, extends the CIM (common information model) as data model to be compatible with needs of ITSM and designs the functions of three layers of Federation CMDB. It also discusses some considerations on Federation CMDB with CMDBf specification for interface layer and data normalization and data reconciliation for aggregation layer. |
