Oracle-L: RE: one question on backup and restore

From: Mladen Gogala <mladen_at_wangtrading.com>
Date: Thu, 28 Aug 2003 14:59:25 -0800
Message-ID: <F001.005CDCF4.20030828145925@fatcity.com>

Yes it can. That's called "cloning". It's even possible to have one instance deliver
redo logs to the other one, who is in constant recovery mode, applying the redo logs
it received from the first one. If the first instance fails, the other one is taken out
of recovery mode and started up right away. It's called "standby database". You don't need
any additional hardware, just the network connection between the twho hosts of the same type
(one machine must apply redo logs from another one). There is also a third option, the most expensive one, but with the greates survivability,
when two machines are accessing a shared array of disks. That will require special adapters,
a private network connection between the two nodes and the software synchronizing access to
the shared disk array. That opion is called RAC and the cost starts with $10,000.
Fourth option, in which you would lose a few minutes of data is replication software called
Data Guard. Essentially, you replicate one database to another in dicrete intervals. The
technology is based on LogMiner. Now all that is left to you is to chose the option appropriate
for your business need and negotiate the price with the Oracle Corp. sales person. Piece of cake.

--

Mladen Gogala
Oracle DBA

-----Original Message-----

CHEN,JIN
Sent: Thursday, August 28, 2003 6:34 PM
To: Multiple recipients of list ORACLE-L

Hi Greetings,

I have such a plan but not sure if it is feasible. Please help! I install oracle server on two different machine (say A and B). In general, we run on one instance on server A. If we met any problem on server A, we copy all data files, control files and redo files plus spfile<SID>.ora to server B. Can server B startup that instance?

Is there any restriction on this plan? or it is totally impossible? Would you please advise why?

Thanks alot!
Jin
btw, they both are Solaris.

--

Please see the official ORACLE-L FAQ: http://www.orafaq.net
--

Author: CHEN,JIN
INET: jinchen_at_ufl.edu

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Please see the official ORACLE-L FAQ: http://www.orafaq.net
--

Author: Mladen Gogala
INET: mladen_at_wangtrading.com

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