Prepare the First Source Database to Send Redo to the Mining Database

To prepare the first source database to send redo to the mining database:

Make certain that DBMS1 source database is running with the required compatibility.
```
select name, value from v$parameter where name = 'compatible';

NAME            VALUE
---------       ---------------------
compatible      11.1.0.0.0
```
The minimum compatibility setting required from capture is 11.1.0.0.0.

Set DG_CONFIG at DBMS1 source database.

ALTER SYSTEM SET LOG_ARCHIVE_CONFIG='DG_CONFIG=(dbms1, dbmscap)';

Set up redo transport at DBMS1 source database. The TEMPLATE clause is mandatory if you want to send redo data directly to foreign archived logs at the downstream mining database.

ALTER SYSTEM
SET LOG_ARCHIVE_DEST_2='SERVICE=DBMSCAP.EXAMPLE.COM ASYNC OPTIONAL NOREGISTER
TEMPLATE='/usr/orcl/arc_dest/dbms1/dbms1_arch_%t_%s_%r.log VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)DB_UNIQUE_NAME=dbmscap';

Enable the downstream destination.

ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_2=ENABLE;