Illustration strms037.gif shows an example downstream capture configuration that involves the following steps:

1. Users make changes to database objects at a source database.
2. The source database logs the changes in a local redo log.
3. Redo log files are copied to the downstream database.
4. A capture process captures changes in the redo log files at the downstream database and enqueues these changes as LCRs into a queue at the downstream database.