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Change Data Capture – Efficient ETL for Real-Time BI


Business intelligence (BI) is at the heart of the best global organizations, enabling them to understand business trends, improve decisions and support day-to-day operations. ETL (extract, transform and load) is the process that enterprises use to build the consolidated data stores (e.g., data warehouses and data marts) required for effective BI. Traditionally, ETL processes have been run periodically, on a monthly or weekly basis, and use a bulk approach that moves and integrates the entire data set from the operational source systems to the target data warehouse. While this approach was acceptable for enterprises over the years, current business conditions require a new way of integrating data - in real time and in an efficient manner.

Changing Business Conditions Demand a Change of Approach

  • Business globalization and 24x7 operations. In the past, enterprises could stop online systems during the night or weekend, to provide a window of time for running bulk ETL processes. Today, running a global business with 24x7 operations means smaller or no downtime windows.
  • Need for up-to-date, current data. Customer demand, competitive pressure and improved decisions require timely information. To make the most of BI in today's ever-accelerating business climate, managers should not be working with last week's or yesterday's data. Today, decision-makers need data that is updated a few times a day or even in real time.
  • Data volumes are increasing. As time passes and the business grows, data volumes in operational data stores become larger. The larger the data volumes become, the more resources and time are required by the ETL processes. This trend challenges the bulk extract windows that are getting smaller and smaller.
  • Cost reduction. Bulk ETL operations are costly and inefficient, as they require more processing power, more memory and more network bandwidth. In addition, as bulk ETL processes run for long periods of time, they also require more administration and IT resources to manage.

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