Federation Supplements The Data Warehouse - Not Either/Or, Never Was
Few enterprise data warehousing (EDW) professionals regard the key rival approach--data federation--to be a best practice. Usually, the reasons for this disdain are valid, such as the fact that federated environments are not optimized for heavy-hitting data matching, merging, transformation and cleansing, all of which are essential functions to deliver a "single version of the truth" for business intelligence (BI).