Encyclopedia of Database Systems

2009 Edition
| Editors: LING LIU, M. TAMER ÖZSU

Active and Real-Time Data Warehousing

Reference work entry
DOI: https://doi.org/10.1007/978-0-387-39940-9_8

Synonyms

Definition

Active Data Warehousing is the technical ability to capture transactions when they change, and integrate them into the warehouse, along with maintaining batch or scheduled cycle refreshes. An active data warehouse offers the possibility of automating routine tasks and decisions. The active data warehouse exports decisions automatically to the On-Line Transaction Processing (OLTP) systems.

Real-time Data Warehousing describes a system that reflects the state of the warehouse in real time. If a query is run against the real-time data warehouse to understand a particular facet about the business or entity described by the warehouse, the answer reflects the state of that entity at the time the query was run. Most data warehouses have data that are highly latent – or reflects the business at a point in the past. A real-time data warehouse has low latency data and provides current (or real-time) data.

Simply put, a real-time data warehouse can...

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.IBM India Research LabNew DelhiIndia
  2. 2.University of LinzLinzAustria
  3. 3.University of South AustraliaAdelaideAustralia