Database Software

Hi all,

11.2.0.3.10

aix 6

I tried to follow this doc which installing/configuring dataguard > http://www.oracle-base.com/articles/11g/data-guard-setup-11gr2.php

I am just confused about the following steps:

Restore the backup files.

==================

$ export ORACLE_SID=DB11G

$ rman target=/

RMAN> STARTUP MOUNT;

RMAN> RESTORE DATABASE;

Create Redo Logs

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Create online redo logs for the standby. It's a good idea to match the configuration of the primary server.

ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT=MANUAL;

ALTER DATABASE ADD LOGFILE ('/u01/app/oracle/oradata/DB11G/online_redo01.log') SIZE 50M;

ALTER DATABASE ADD LOGFILE ('/u01/app/oracle/oradata/DB11G/online_redo02.log') SIZE 50M;

ALTER DATABASE ADD LOGFILE ('/u01/app/oracle/oradata/DB11G/online_redo03.log') SIZE 50M;

ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT=AUTO;

My question is, why do I need to create online redo logs for standby, when they are already created when you restore the backup?

Are the online redo logs does not match with the backup? or not being backed-up?

Thanks,

mk