Message-ID: <F001.004816DF.20020619084836@fatcity.com>
Date: Wed, 19 Jun 2002 08:48:36 -0800
To: Multiple recipients of list ORACLE-L <ORACLE-L@fatcity.com>
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From: Joe Testa <jtesta@dmc-it.com>
Subject: Re: Online vs offline backups
Organization: Fat City Network Services, San Diego, California
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I used to believe that(and still do most of the time), here is the catch.

if you need to restore lets say all of the datafiles because you lost
all of the datafiles(but your control files and redo logs are intact),
you just need to make sure to restore ONLY the parts you need, thats the
simplest way to make sure you get a good setup for recovery. Restoring
all of the control files and/or all of the redo logs will messup the
chance to roll forward.

joe


Taylor, Shirley wrote:

>I disagree. Always backup the online redo logs when doing a cold backup.
>Rama Valpuri's book Oracle Backup and Recovery chapter 3 on physical backups
>says "...use the os backup utility to copy all the onine redo log files,
>databases files and control files."
>
>
>-----Original Message-----
>Sent: Wednesday, June 19, 2002 9:38 AM
>To: Multiple recipients of list ORACLE-L
>
>
>Ferenc Mantfeld，
>
>  
>
>>The same person that advocated a cold backup
>>did not back up the online redo logs, so what use was it anyway, since the
>>only way they would force open their DB is with a resetlogs option anyway.
>>    
>>
>	For cold backup, oracle does not recommend backup the online redo
>log. And if you restore the whole cold backup, why need the online redo log?
>I am sure people doing cold backup will do shutdown normal/immediate, not
>shutdown abort.So there is no need to backup the online redo log at all!
>Backup the online redo log also take the risk of damage the current online
>redo log when you want to do full recovery.
>	So, never backup the online redo log when doing cold backup.
>
>                    致
>礼！
>
>            chal_ping
>            chaospku@163.net
>
>  
>

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Author: Joe Testa
  INET: jtesta@dmc-it.com

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