Friends,

Define Centralized Data Warehouse ?
How this is different from Data Warehouse?

A Centralized Data Warehouse is a data warehousing implementation wherein a single data warehouse serves the needs of several separate business unites simultaneously using a single data model that spans the needs of multiple business divisions.
Companies can have the option to have several data warehouses in different locations. These data warehouses communication with each other and send, extracts, transforms and loads data for statistical analysis.
Data security is a critical issue in data warehouses from several locations trying to send and receive data and constantly make contact with each other. Communication lines can be open to sniffers and malicious hackers and crackers may be able to steal important information and breach privacy. Securing a network is an expensive activity so companies will have to spend more on buying appropriate technology measures.
Having a centralized data warehouse has its own advantages. The company will have to invest only a central IT team. The central team will be responsible for defining and publishing corporate dimensions. This is can especially true if the company has multiple lines of business to be combined in one robust framework. The team is also responsible for providing cross divisional applications. The need to purchase to software and database tools will only be for the central data warehouse and it can be fairly easy to implement cross divisional applications.