Thanks Dan, I've found myself defending that position from time to time.
Jared
"Daniel W. Fink" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
04/02/2003 11:20 AM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: Re: dbshut script - shutdown or shutdown immediate
Multiplexing redo logs has nothing to do with the archive mode. Logs are
multiplexed so that an error writing to one of the members in a group does
not cause the instance to terminate.
Myth - If you use disk mirroring, you don't need to multiplex your redo
logs.
Reality - Mirroring only protects from hardware failure. It will not
protect you from accidental deletion of the log (been there, had to fix
it!).
--
Daniel W. Fink
http://www.optimaldba.com
IOUG-A Live! April 27 - May 1, 2003 Orlando, FL
Sunday, April 27 8:30am - 4:30pm - Problem Solving with Oracle 9i SQL
Thursday, May 1 1:00pm - 2:00pm - Automatic Undo Internals
GovindanK wrote:
Shutdown abort is pretty drastic, are you sure shutdown immediate didn't
work?
Well said. This topic has been circulating in many DBA forums for a long
time. Shutdown immediate does rollback and will take time if no.of users
is high. On the otherside, shutdown abort simply takes the db down and
does not bother about anything else. As per manual, if you do a shutdown
abort then you WILL need the online redo logs for recovery just in case.
Think twice if your db is in NOARCHIVELOG mode. If your db is in ARCHIVE
mode make sure the logs are multiplexed. Though Oracle's recovery seems
to be sturdy, double check your backup & recovery strategies. Also, which
option to use is influenced by how much downtime/shutdown time you can
afford.
HTH
GovindanK
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