RE: upgrade RAC from 9.2.0.8 to 10.1.0.4

For best practices, you should not share the oracle_home and
oracle_crs_home.  This allows you to patch each node individually while
the other node can keep running.  Many patches allow what is called a
"rolling patch, or rolling upgrade", although not all.

 

________________________________

From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of sundar mahadevan
Sent: Tuesday, August 18, 2009 12:07 PM
To: Oracle-L@xxxxxxxxxxxxx
Subject: Re: upgrade RAC from 9.2.0.8 to 10.1.0.4

 

I believe I got the answer for ora_crs_home and oracle_home.
ora_crs_home(non shared location) is the location for crs
binaries(basically clusterware software/binaries reside here) and oracle
binaries reside at oracle_home. so ora_crs_home and its binaries reside
in all nodes on RAC. The location of the voting disk and OCR is
specified later in the OUI installer page that should reside in the
shared location. Am I right? Still I dont understand why I received the
error when the location I mentioned was shared.

On Tue, Aug 18, 2009 at 11:37 AM, sundar mahadevan
<sundarmahadevan82@xxxxxxxxx> wrote:

Hi Martin,
Once again you have dropped in to bail me out. Thanks for your reply. My
9.2.0.8 configuration was like this: For shared file system on my test
9i RAC, i used iscsi(iscsi target and iscsi initiator to simulate shared
disk between 2 hosts). /var/opt/oracle was the shared disk mount point
shared between host 1 and 2. I had created a partition of 20G on the
shared disk and used ocfs2 for the shared disk cluster file system. I
had quorum file, Shared Configuration File, all database files in
/var/opt/oracle while the binaries were in /opt/oracle/product/9.2.0 on
both host 1 and host 2 individually. To my knowledge, oracm was just
oracle cluster manager that was available in 9i and definitely there was
no clusterware. With oracm replaced by oracle clusterware, quorum disk
replaced by voting disk and shared configuration file replaced by OCR, I
still believe that 10.1 RAC should be possible with iscsi(for shared
disk) and OCFS2. Do you think it is not possible?

For 10g, I created another partition of size 20G and mounted it on /u01.
Now /u01 is shared between 2 hosts. But 10.1 oracle_home and
ora_crs_home is a bit confusing. when /u01 is shared, then both
/u01/app/oracle/product/crs(ora_crs_home) and
/u01/app/oracle/product/10.1.0/Db_1 are shared. In this case both oracle
clusterware and oracle binaries would be shared which should n't be the
case. What am I doing wrong here. What is the correct setup. Thanks for
your time and patience.

 

On Tue, Aug 18, 2009 at 1:43 AM, Martin Berger
<martin.a.berger@xxxxxxxxx> wrote:

Hi Sundar,

I'm not sure if you have faced the differences between your 9i and 10g
RAC:
In 9i, which kind of clusterware do you have?

In 10g, you will need Oracle Clusterware (CRS - Cluster Ready Services),
and your db-binaries in a seperated ORACLE_HOME.
If you still needs a shared filesystem, you will also need a cluster
framework from a 3rd party, as Oracle Clusterware (up to 11gR1) does not
provide a shared filesystem.
Without shared filesystem, you can use pure oracle stack (clusterware +
rdbms binaries) and ASM for shared acces to the datafiles.
As a last ressort, you can also use raw-devices for your datafiles, but
this is not recommended.

You mentioned the 'cluster registry file'.
a RAC needs some shared informations. (the cluster registry). this must
be stored on a cluster filesystem or shared raw devices.
You will also be asked for some voting disks. they also must be
accessable on all nodes..

Can you tell which kind of configuration you will try to implement?

best regards,
 Martin


Am 17.08.2009 um 22:12 schrieb sundar mahadevan:

         

        Hi Gurus,
        I'm trying to upgrade my test 2 node RAC presently on 9.2.0.8 to
10.1.0.4 . I can only upgrade it to 10.1 because my test servers only
have 512 MB RAM. These are just fine for my home environment and AFAIK
512 MB RAM is good for 10.1. The 9i RAC setup was as follows: I had
oracle 9i binaries on /opt/oracle/product/9.2.0 (on both host 1 and 2)
and the datafiles on shared disk on /var/opt/oracle. I 'm a little
confused as if this is a similar setup in 10.1 as well. I did not find
any upgrade documents from 9i to 10.1 but was able to find for 9i to
10.2 Do you think I can follow the 9i to 10.2 RAC upgrade doc. The first
thing in this upgrade is to setup CRS. I invoked the crs runinstaller
and it asked me for home. I entered the 10.1 CRS home on shared
disk(/u01/app/oracle/product/crs) but it gives me an error saying:
oracle cluster registry can only exist as a shared system file or as a
shared raw partition. Any ideas?   Please help. Thanks in advance.

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