Oracle GoldenGate Classic Architecture Documentation Extract Configuring a Downstream Mining Database Example Downstream Mining Configuration Example 1: Capturing from One Source Database in Real-time Mode Prepare the Mining Database to Archive its Local Redo Prepare the Mining Database to Archive its Local Redo To prepare the mining database to archive its local redo: The downstream mining database must be in archive log mode. You can do this by issuing the following DDL. STARTUP MOUNT; ALTER DATABASE ARCHIVELOG; ALTER DATABASE OPEN; At the downstream mining database, set log_archive_dest_1 to archive local redo.ALTER SYSTEM SET LOG_ARCHIVE_DEST_1='LOCATION=/home/arc_dest/local VALID_FOR=(ONLINE_LOGFILE, PRIMARY_ROLE)' Enable log_archive_dest_1.ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_1=ENABLE