Upgrading 11.5.10.2 to R12 - 2 nodes - DB 10.2.0.2 - Solaris SPARC

Question

Guys,
We are upgrading our 11.5.10.2 instance to R12. Ours is a 2 node installation. Node A has DB and Concurrent processing services and Node B has Web and Forms services. As per these guides, we have followed the all the steps and
started rapidwiz (Rapid wizard version 12.0.0.21). Here are the options we
selected in the rapidwiz screens:
1. "Upgrade to Oracle Applications Release 12" in the select wizard operation screen
2. "Create Upgrade File System" in the Select Upgrade Action screen.
And then we entered the port details, Database Configuration and Application User information in the respective screens. Then we got the "Primary Applications Node configuration" screen.
Here are our questions:
1. We entered "Server A" as the DB host and "Server B" as the host for the primary application node. We are able to select the services for the Primary application node using the "edit services" option in the "Primary applications node configuration" screen. But there is no such option for selecting the services for "Server A" on which the CCMs would be running. So how can we make sure that the config file created by rapidwiz has the correct details. Do we need to add "Server A" as the secondary Applications node using the "Add Server" option in the "node information" screen.
2. Rapid Install guide says "Using ftp, copy the
<10g ORACLE_HOME>/appsutil/conf_<SID>.txt configuration file to each Applications node" and then run rapidwiz on the application nodes like "rapidwiz -silent -config <configuration file>". Do we need to make any changes in the
configuration file before ftping it to the other node.
3. As we mentioned earlier, our DB is already on 10.2.0.2. We use the same oracle home for many other databases. So we don't want autoconfig to run on the 10g Oracle home as it is shared by many other databases. Also we don't want to have separate oracle homes for all the instances running on the server A. But rapidwiz installs a new oracle home based on the details provided. So what are the
options we have for upgrading to R12 without affecting our existing oracle
home.
Hoping to get an anwer from you guys.
Thanks,
John

Answer 1

John,
1. Yes, the R12 methodology is to assume the DB host will be a DB only host. If you still wnat to run concurrent managers there, you will need to add a host on the Applicatiosn Node screens.
2. You should not need to modify the context file before copying/ftp-ing to the other server.
3. Unless you are absolutely strapped for disk space, I have never advocated running other databases out of an Apps database oracle home. If you want to upgrade your Apps database to 10.2.0.3, then you cannot until all of the other database owners agree to the database upgrade. If you want to use your existing 10.2.0.2 Oracle Home, you will need to apply 35 RDBMS patches via opatch and complete all actions from the readmes.
Oracle 10gR2 Database Preparation Guidelines for an E-Business Suite Release 12 Upgrade
http://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=403339.1
It would be less work to accept the new rapid install delivered 10.2.0.2 Oracle Home, and leave your existing databases running out of the old 10.2.0.2 Oracle Home. Note 403339.1 was recently updated to indicate you can switch existing 10.2.0.2 Apps databases to the rapid install delivered Oracle Home.
If you follow the R12 upgrade doc (Oracle Applications Upgrade Guide: Release 11i to Release 12 (zipped) B31566-01), you can easily generate your 10gR2 context file and run autoconfig on the rapid install delivered 10.2.0.2 Oracle Home. If you are using the rapid install delivered 10.2.0.2 Oracle Home, you will not disrupt any other databases using your old 10.2.0.2 Oarcle Home.
Update the RDBMS ORACLE_HOME file system with AutoConfig files.On the application tier (as the APPLMGR user):
Log on to the APPL_TOP environment (source the environment file).
Run the following Perl script to create appsutil.zip in <INST_TOP>/admin/out.
perl <AD_TOP>/bin/admkappsutil.pl
On the database tier (as the ORACLE user):
Copy or FTP the appsutil.zip file to the <RDBMS ORACLE_HOME>.
cd <RDBMS ORACLE_HOME>
unzip -o appsutil.zip
2.Run AutoConfig on the database tier nodes.UNIX:
<RDBMS ORACLE_HOME>/appsutil/scripts/<CONTEXT_NAME>/adautocfg.sh