Illustration strep023.htm shows the details of the primary database ps1.net Streams configuration, including the following mechanisms:

• One queue that is used by the capture process, propagations, and apply processes.
• 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 regardless of whether its tag is NULL.
• One propagation that propagates catpured changes to ps2.net. The propagation propagates all changes except changes with a tag of '2'.
• One propagation that propagates catpured changes to ps3.net. The propagation propagates all changes except changes with a tag of '3'.
• One propagation that propagates catpured changes to ps4.net. The propagation propagates all changes except changes with a tag of '4'.
• One apply process apply changes from ps2.net. These changes have a tag of '2' in the redo log.
• One apply process apply changes from ps3.net. These changes have a tag of '3' in the redo log.
• One apply process apply changes from ps4.net. These changes have a tag of '4' in the redo log.
• One propagation job to propagate locally captured LCRs to mult2.net and another propagation job to propagate locally captured LCRs to mult3.net.