Monday, July 23, 2012

change the ASM spfile in 11gR2


How to change the ASM spfile in 11gR2
Logical steps to change the ASM spfile
  1. Create intermediate pfile from the current spfile or pfile
  2. Create spfile in a new disk group from the intermediate pfile
  3. Restart the HA stack to verify that ASM starts up fine with moved spfile
  4. Remove the original spfile
You can verify whether you are using the correct spfile for the ASM in the cluster environment.
Multiple way to check the spfile details in 11gR2

#1
oracle +ASM1> asmcmd spget
+OCR_VOTE/bhurac1a/asmparameterfile/registry.253.789386957

#2
oracle +ASM1 > gpnptool get
<?xml version="1.0" encoding="UTF-8"?><gpnp:GPnP-Profile Version="1.0" xmlns="http://www.grid-pnp.org/2005/11/gpnp-profile" xmlns:gpnp="http://www.grid-pnp.org/2005/11/gpnp-profile" xmlns:orcl="http://www.oracle.com/gpnp/2005/11/gpnp-profile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.grid-pnp.org/2005/11/gpnp-profile gpnp-profile.xsd" ProfileSequence="11" ClusterUId="3aebd9e0996e5f57bf5fa6a0accabc43" ClusterName="bhurac1a" PALocation=""><gpnp:Network-Profile><gpnp:HostNetwork id="gen" HostName="*"><gpnp:Network id="net2" IP="10.217.11.16" Adapter="bond4" Use="cluster_interconnect"/><gpnp:Network id="net1" Adapter="bond2" IP="10.218.8.0" Use="public"/></gpnp:HostNetwork></gpnp:Network-Profile><orcl:CSS-Profile id="css" DiscoveryString="+asm" LeaseDuration="400"/><orcl:ASM-Profile id="asm" DiscoveryString="/dev/oracleasm/disks" SPFile="+OCR_VOTE/bhurac1a/asmparameterfile/registry.253.789386957"/><ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/><ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/><ds:Reference URI=""><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/><ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"> <InclusiveNamespaces xmlns="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="gpnp orcl xsi"/></ds:Transform></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><ds:DigestValue>1ZtgbzWQAuybhO0J12R2X5D+gMc=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>A1Bx+lPu1QSsxGYrRJ5jVbhJ/oVkP8DcKxoCgV90gLk7/m4CztcatcRftHSDvg92z/0HzEog7AGltl0pDZZLMgA9sglWUop/GOPkzF1jxO9I7qbjQjeqLOoS79+XXV9M9LQ8KtosNvGE50VdE2tswdWc2IDJ8AelhL9wNCabBwg=</ds:SignatureValue></ds:Signature></gpnp:GPnP-Profile>
Success.

#3
oracle +ASM1 > sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Mon Jul 23 12:22:00 2012
Copyright (c) 1982, 2011, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options
SQL> show parameter spfile
NAME                                 TYPE                                                  VALUE
------------------------------------ ----------------------------------------------------
spfile                               string  +OCR_VOTE/bhurac1a/asmparameterfile/registry.253.789386957

If you want to create a spfile from the existing spfile with some modification then you need to take backup from existing one.

SQL> create pfile='/home/oracle/init+ASM.ora' from spfile;
In the below case, my spfile is located in the environment and it is NOT picked up by the cluster during the startup.

So I am creating the pfile from spfile which is located in the diskgroup.

SQL> create pfile='/home/oracle/init+ASM.ora' from spfile='+OCR_VOTE/bhurac1a/ASMPARAMETERFILE/REGISTRY.253.757697363';

If you need modify any parameter in the ASM parameter, we can modify it.

Create a new spfile from the pfile
SQL> create spfile=’+OCR_VOTE’ from pfile='/home/oracle/init+ASM.ora';

Once the spfile is create, if you check spfile location in the cluster environment. it will show the new file.
You can verify using the below command. Note: THIS SPFILE WILL BE INCLUDING TO ALL THE CLUSTER NODES IN THE ENVIRONMENT.

#1 set the ASM environment values
$ asmcmd spget
(Or)
$ gpnptool get

Restart the cluster and you could see the cluster is picking up the new spfile.



1 comment: