Operational data store
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An operational data store is used for operational reporting and as a source of data for the enterprise data warehouse. It is a complementary element to an EDW in a decision support landscape, and is used for operational reporting, controls and decision making, as opposed to the EDW, which is used for tactical and strategic decision support.
An operational data store should not be confused with an enterprise data hub (EDH). An operational data store will take transactional data from one or more production system and loosely integrate it, in some respects it is still subject oriented, integrated and time variant, but without the volatility constraints. This integration is mainly achieved through the use of EDW structures and content.
An ODS is not an intrinsic part of an Enterprise Data Hub solution, although an EDH may be used to subsume some of the processing performed by an ODS and the Enterprise Data Warehouse. An EDH is a broker of data. An ODS is certainly not.
An operational data store (or "ODS") is a database designed to integrate data from multiple sources for additional operations on the data, for reporting, controls and operational decision support. Unlike a production master data store, the data is not passed back to operational systems. It may be passed for further operations and to the data warehouse for reporting.
Because the data originate from multiple sources, the integration often involves cleaning, resolving redundancy and checking against business rules for integrity. An ODS is usually designed to contain low-level or atomic (indivisible) data (such as transactions and prices) with limited history that is captured "real time" or "near real time" as opposed to the much greater volumes of data stored in the data warehouse generally on a less-frequent basis.
The general purpose of an ODS is to integrate data from disparate source systems in a single structure, using data integration technologies like data virtualization, data federation, or extract, transform, and load (ETL). This will allow operational access to the data for operational reporting, master data or reference data management.
- Some examples of ODS Architecture Patterns can be found in the article Architecture Patterns.
- Enterprise architecture
- ODS Architecture Patterns (EA Reference Architecture)
- Bill Inmon Information Management article on ODS
- Bill Inmon Information Management article on the five classes of ODS
- Claudia Imhoff. "Information Management article on ODS" (PDF).[dead link]
- Inmon, William (1999). Building the Operational Data Store (2nd ed.). New York: John Wiley & Sons. ISBN 0-471-32888-X.
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