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downstream data capture

Oracle Tips by Burleson 

In this chapter, details of some of the advanced Streams configuration details involving the Down Streams capture process were presented.

The main points of downstream data capture include:

  • The Down Streams Capture methodology allows the use of a secondary database as the site of the Capture process.

  • Once the logs are moved to the Down Streams Capture process, the scanning and constructing of LCR events is done at this secondary database.

  • Enqueuing occurs at the secondary database.  This method effectively moves the Capture process to another database.

  • There are two methods of Down Streams capture: Implicit Log assignment capture and Explicit Log assignment capture. The Implicit method depends on the automatic feed of logs with help of log transport services. The Explicit method depends on manual SQL commands to assign the logs.

In the next chapter, information on the Streams configuration in a Real Application Cluster environment will be presented.

The above text is an excerpt from:

Oracle Streams
High Speed Replication and Data Sharing

ISBN 0-9745993-5-2

by Madhu Tumma

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