Data Mart Proliferation Is Costly and Degrades Data Quality
A typical data warehouse deployment pattern is a central data warehouse hub with satellite or dependent data marts as spokes around the hub.
These marts typically use a subset of the warehouse data and are used by a subset of the data warehouse users.
Sometimes these marts are created because the analytic tools used require data in a different form than the warehouse. Many times however, they are “rogue data marts” created to “get around” the controls provided by the warehouse.
Regardless of the reason, every additional mart adds cost and compromises data quality.
Use Data Virtualization to Create Virtual Data Marts
You can use Composite data virtualization to provide virtual data marts that eliminate, or at least significantly reduce, the need for physical data marts around your data warehouse hubs.
This approach uses abstraction to transform the warehouse data to meet specific consuming tool requirements and user query requirements, while still preserving the quality and controls inherent in the data warehouse.
Use Data Virtualization to Virtualize Spoke Data Marts
When Virtual is the Smart Move
When choosing between physical and virtual mart options, architects have to consider a number of business, data source and data consumer considerations. To assist them in this decision process, Composite worked with customers and industry analysts to develop an easy-to-use data integration strategy tool.
Further, in her recent white paper, leading business intelligence and data integration analyst, Claudia Imhoff, Ph.D, provides additional virtual and physical data mart decision guidance in the To V or Not to V: Business Intelligence Gets Virtual!
- Eliminating Rogue Data Marts – A mutual fund company uses data virtualization to enable more than 100 financial analysts to build portfolio analysis models with MATLAB® and other analysis tools leveraging a wide range of equity financial data from a 10 terabyte financial research data warehouse. Prior to introducing data virtualization, analysts frequently spawned new satellite data marts with useful data subsets for every new project. To accelerate and simplify data access and to stop the proliferation of costly, unnecessary physical marts, the firm instead used data virtualization to create virtual data marts formed from a set of robust, reusable views that directly accessed the financial warehouse on demand. This enables analysts to spend more time on analysis and less on access, thereby improving portfolio returns. The IT team has also eliminated extra, unneeded marts and all the costs that go with maintaining them.
- Supporting Diverse Analytics with Virtual Marts – This energy company provides oil well platform data from a central Netezza data warehouse to engineers, maintenance managers, and business analysts each requiring different slices of the data, optimally formatted for their wide range of specialized analysis tools including Business Objects, Excel, Tibco Spotfire, Matrikon ProcessNet, Microsoft Reporting and more. Composite’s ability to build virtual views and services quickly enabled rapid response to new ad hoc queries. Rapid time to data, combined with ease of abstraction (convert from warehouse-stored format to tool-required format), and lower costs encourages analysts to leverage the warehouse as the single source of truth rather that replicate data in local, rogue data marts.