Illustration strep028.htm shows the details of the secondary database ps2.net Streams configuration, including the following mechanisms:

• One queue that is used by the capture process, the propagation, and the apply process.
• A capture process that captures changes in the redo log and converts relevant changes into LCRs, which it enqueues into a queue. The capture process captures a change only if its tag is NULL.
• One propagation that propagates catpured changes to ps1.net.
• One apply process apply changes from ps1.net. These changes have a tag of '00' in the redo log.