Why create logs of recovery sleep?

Hi all

11.2.0.3.10

AIX 6

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

I'm just confused on the following steps:

Restore the backup files.

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

$ export ORACLE_SID = DB11G

rman target $ = /.

RMAN > STARTUP MOUNT;

RMAN > RESTORE database;

Create a Redo Log

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

Create logs of recovery online for sleep. 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 50 M;

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

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

ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT = AUTO;

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

Are the online redo logs does not correspond with the backup? or are not saved?

Thank you

MK

1. "local corruption" one block can corrupt a member of a group of newspapers, but not the other

2. human error by a DBA or SysAdmin can delete a member of a group of newspapers, but not the other

Hemant K Collette

Tags: Database

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