standby redologs ?!!

From: Prem <premj_at_rediffmail.com>
Date: 24 Sep 2011 07:23:16 -0000
Message-ID: <20110924072316.16171.qmail_at_f4mail-235-199.rediffmail.com>

Friends ,
I have a question (sorry if I sound too naive) .

11gR2 manuals say : "The standby redo log must have at least one more redo log group than the redo log at the redo source database, for each redo thread at the redo source database."

It means - we need 3 standby redo log groups on the standby db if there are 2 redo log groups on the primary db . why so ? what is the purpose of that one extra group ?

Regards,
~ JP ~

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Received on Sat Sep 24 2011 - 02:23:16 CDT