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Streams Capture Process Creation

Oracle Tips by Burleson 

Oracle Streams
Chapter 4 - Capture and Propagate Configuration

Capture Process Creation

A Capture process that captures changes to the local source database can be created, or a Capture process that handles the database changes that occur at a remote site can be created. The atter method is known as Down Streams capture. If a Capture process runs on a Down Streams database, redo log files from the source database are copied to the Down Streams database, and the Capture process captures changes in these redo log files at the downstream database. Configuration of Down Streams capture is covered in later chapter.

Oracle provides many procedures that can be used to create the capture process. Any of the following procedures can be used to create a local Capture process:

  • dbms_streams_adm.add_table_rules
     

  • dbms_streams_adm.add_subset_rules
     

  • dbms_streams_adm.add_schema_rules
     

  • dbms_streams_adm.add_global_rules
     

  • dbms_capture_adm.create_capture

Each one of these methods will be examined as will the circumstances in which each one is appropriate.

Figure 4.5 Methods of Creating the Capture Process

 

As shown in Figure 4.5, there are three procedures in the package dbms_streams_adm, each one of these can create a Capture process with the specified name if it does not already exist. They also create either a positive or negative rule set for the Capture process if the Capture process does not already have such a rule set. They can also add table, schema, or global rules to the rule set.


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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