RE: RAC 11gR1 changing control files
Date: Wed, 7 Sep 2011 17:07:51 +0000
Message-ID: <9F15274DDC89C24387BE933E68BE3FD30D33E5_at_MISOUT7MSGUSR9D.ITServices.sbc.com>
Actually, what I was trying to describe is the following process, and get opinions if it will work:
- alter parameter "control_files" scope=spfile to remove 1 of the control files- there will still be at least 3 left.
- shutdown and restart each instance of a RAC cluster one at a time, in a rolling fashion.
-----Original Message-----
From: Chitale, Hemant Krishnarao [mailto:Hemant.Chitale_at_sc.com]
Sent: Tuesday, September 06, 2011 9:57 PM
To: CRISLER, JON A
Cc: oracle-l_at_freelists.org
Subject: RE: RAC 11gR1 changing control files
Interesting idea. Drop a controlfile in a rolling manner.
Unfortunately, it won't work. The controlfile is, in a sense, "outside" of the database --- it actually allows the Instance to identify the physical components of the Database. Thus, there is no "DROP CONTROLFILE" or "ALTER CONTROLFILE OFFLINE" command.
You will have to shutdown all the instances of the database, edit the parameter file and restart the instances. Ouch !
Hemant K Chitale
-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of CRISLER, JON A
Sent: Wednesday, September 07, 2011 4:24 AM
To: 'oracle-l_at_freelists.org'
Subject: RAC 11gR1 changing control files
I ran into a situation where we have 5 control files, and one of these control files is going into a ASM diskgroup used for online redo logs. We are also using a storage snapshot product (NetApp Snapshot Manager for Oracle). Normally the product would not get a snapshot on a volume that only has redo, but since it has a control file on it, we are then forced to track snapshots for redo, which is very expensive in resources. The fix is to drop the control file from that ASM diskgroup.
Which brings me to my question: can I change the control_file parameter to omit that specific control file (I will still have 4 other copies) and bounce the instances in a rolling fashion? Or do all instances have to be shutdown so that the control file parameter is always consistent ?
--
http://www.freelists.org/webpage/oracle-l
This email and any attachments are confidential and may also be privileged. If you are not the addressee, do not disclose, copy, circulate or in any other way use or rely on the information contained in this email or any attachments. If received in error, notify the sender immediately and delete this email and any attachments from your system. Emails cannot be guaranteed to be secure or error free as the message and any attachments could be intercepted, corrupted, lost, delayed, incomplete or amended. Standard Chartered PLC and its subsidiaries do not accept liability for damage caused by this email or any attachments and may monitor email traffic.
Standard Chartered PLC is incorporated in England with limited liability under company number 966425 and has its registered office at 1 Aldermanbury Square, London, EC2V 7SB.
Standard Chartered Bank ("SCB") is incorporated in England with limited liability by Royal Charter 1853, under reference ZC18. The Principal Office of SCB is situated in England at 1 Aldermanbury Square, London EC2V 7SB. In the United Kingdom, SCB is authorised and regulated by the Financial Services Authority under FSA register number 114276.
If you are receiving this email from SCB outside the UK, please click http://www.standardchartered.com/global/email_disclaimer.html to refer to the information on other jurisdictions.
--
http://www.freelists.org/webpage/oracle-l
Received on Wed Sep 07 2011 - 12:07:51 CDT