OCP-1Z0-053-V12.02-189题

189.What RMAN command must you use before you can back up a database using the recovery catalog?

A. create catalog

B. install database

C. catalog database

D. merge Catalog with database

E. register database

Answer: E

答案解析：

Registering a Database with the REGISTER DATABASE Command

The first step in using a recovery catalog with a target database is registering the target database in the recovery catalog. If you use the catalog in a Data Guard environment, then you can only register the primary database in this way.

Use the following procedure:

1. Start RMAN and connect to a target database and recovery catalog. The recovery catalog database must be open.

   For example, issue the following command to connect to the catalog database with the net service name catdb as user rman (who owns the catalog schema):

   % rman TARGET / CATALOG rman@catdb

2. If the target database is not mounted, then mount or open it:

   STARTUP MOUNT;

3. Register the target database in the connected recovery catalog:

   REGISTER DATABASE;

   RMAN creates rows in the catalog tables to contain information about the target database, then copies all pertinent data about the target database from the control file into the catalog, synchronizing the catalog with the control file.

4. Verify that the registration was successful by running REPORT SCHEMA:

   REPORT SCHEMA;

   Report of database schema

   File Size(MB) Tablespace RB segs Datafile Name

   ---- ---------- ---------------- ------- -------------------

   1 307200 SYSTEM NO /oracle/oradata/trgt/system01.dbf

   2 20480 UNDOTBS YES /oracle/oradata/trgt/undotbs01.dbf

   3 10240 CWMLITE NO /oracle/oradata/trgt/cwmlite01.dbf

   4 10240 DRSYS NO /oracle/oradata/trgt/drsys01.dbf

   5 10240 EXAMPLE NO /oracle/oradata/trgt/example01.dbf

   6 10240 INDX NO /oracle/oradata/trgt/indx01.dbf

   7 10240 TOOLS NO /oracle/oradata/trgt/tools01.dbf

   8 10240 USERS NO /oracle/oradata/trgt/users01.dbf

官方参考：http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmcatdb.htm#i1006311