If the database crash causes media failure of your archive destination or
your online log destination, then you can only recover the database upto
the last archivelog availability, and you would need to open the database
with resetlogs. This is true for both scenarios.
Assuming no media failures, in the scenario 2, you can always recover upto
the point of the last archive log, and then apply the online redo log file
to perform a complete recovery. So you colleague is right. Both of them are
practically the same, except in scenario 2, your database needs to be down
for the backup.
Regards
Raj
Rick_Cale@team
health.com To: Multiple recipients of list ORACLE-L
<[EMAIL PROTECTED]>
Sent by: cc:
[EMAIL PROTECTED] Subject: Opinions on B&R scenarios
om
October 23,
2002 11:15 AM
Please respond
to ORACLE-L
Hi DBAs,
A co-worker and I disagree on impact of slightly different B&R scenarios
and I would like your thoughts.
Environment for both scenarios: Oracle 8.1.6, WinNt, Archivelog mode, not
using RMAN
Scenario 1:
I do standard Hot Backup using
BEGIN BACKUP
OCOPY ...
END BACKUP
.....
If database crashes I perform media recovery then recover database.
Scenario 2:
Co-worker shuts down database and copy all files to backup directory.
Restarts database backup
If database crashes restore backup files then apply the
archive logs.
Co-worker says both scenarios are the same. I think scenario 1 results in
no loss where scenario 2 results in the loss
of data that was in the online redo logs.
Any thoughts on this?
Also what is the minimum system/object priviledges a user needs to perform
B&R. I would like to create a user with only those
privs necessary for B&R.
Thanks
Rick
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