RE: Oracle Complete Recovery.
- From: "Johnson, George" <GJohnson@xxxxxxx>
- To: "'prabhu_adam@xxxxxxxxxxx'" <prabhu_adam@xxxxxxxxxxx>, oracle-l@xxxxxxxxxxxxx
- Date: Mon, 26 Sep 2005 09:11:53 +0100
Just some thoughts on this, may be a little OT.
I always ask to have the interviewer clarify the exact situation as
they see it. I despise people who panic, "Oh DB has crashed and it's
corrupted, quick get all the backups and all the logs and a new server
and...". When you actually look at it, it crashed and one temporary tempfile
can't be found! In this instance ask them to clarify exactly what happened,
then assure him you will start with a good look through the alert logs and
trace files, if still possible, then work from there. Say you will order up
the tapes just in case, if they're offsite, then make a thorough
investigation ASAP. This could be a simple test to see if you panic over
what may be potentially nothing, like a missing tempfile! If they want to go
further, then you can say, "well after checking, if I found only one file, I
simply restore that, if required, then recover the file off the logs". Then
deeper if the corruption is worse. Getting tight down to a full restore/full
recovery only as a last resort, clarifying tech details only as required.
I got caught out once at an interview, years ago. "Reports coming in
about prod database down, what would you do?", I started banging on about
alert logs, trace files and recovery and the interviewer turned round and
said "Well actually, the help desk only got two calls from a 3,000 user
base. A simple check on the PCs first, would have uncovered that their
network cables had just been pulled by accident by a cleaner, vacuuming.".
Rgds
-----Original Message-----
From: Prabhu, K [mailto:prabhu_adam@xxxxxxxxxxx]
Sent: 24 Sep 2005 17:24
To: oracle-l@xxxxxxxxxxxxx
Subject: Oracle Complete Recovery.
All,
In an interview I'm asked this question that, how will you do complete
recovery for a database which is running in archivelog mode.
I answered as first I'll restore all the backups then I'll mount the
database, then I'll start the recovery by using command alter database
revocery.
But my interviewer was not statisfied with my answer and he asked me is
there any other way you can recover the database without using alter
database command.
As the interviewer said is there any other way we can do that ?
your help is deeply appreciated.
Thanks.
Prabhu
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