Multi Node to Single Node in 11i

Multi Node to Single node in 11i
Apps-11.5.10.2 DB-9.2.0.6
Architecture- NODE A- Apps(Conc/Rep/admin),DB
NODE B- Apps(forms/web)
Purpose: Convert NODE A + NODE B = NODE A (multi node to single node)
Few easy steps to achieve this using "appsTier merge" and "appltop merge"
Prerequisties- Application tier patches- 4038964 and 4175764 AND AD Minipack AD.I.2 or more(would suggest apply latest one i.e AD.I.delta.6 (6502082)) . Better apply on both apps node with below syntax of adpatch
adpatch options=nocopyportion,nodatabaseportion,nogenerateportion,hotpatch
verify above patches and patch_level from table ad_bugs and fnd_products_installations .
Step 1> Login to NODE A as applmgr, run adadmin for maintain snapshot information.APPS & DB should be up & running till end.
Step 2> Now run adpreclone using merge option $COMMON_TOP/admin/scripts/
perl adpreclone.pl appsTier merge
This command will run adgenhfver.pl from $AD_TOP/bin
Note: At this point you may get error like "Could not create the high water mark manifest....."
update AD patch set level AD.I.2 to higher(eg: AD.I.delta.6)
Then, Re-Run snapshot and again run 'perl adpreclone.pl appsTier merge'
Let it complete, This script will take time to complete and run below sqls.
--adgenhfver.pl from $AD_TOP/bin
--$AD_TOP/patch/115/sql/admsnlst.sql (PL/SQL script to create manifest file used for merging APPL_TOPs)this script also create hfilever_appl_top.txt in appl-top/admin/out directory
--at last adclone.pl will run
Step 3> Login to NODE B as applmgr, run adadmin for maintain snapshot information.APPS & DB should be up & running till end.
Step 4> Now we will merge APPL_TOP using perl adpreclone.pl appltop merge
Let it run ...same sqls will run as in Step 2. But this script create 'appl' folder in "$COMMON_TOP/clone"
Step 5> Shutdown the APPS TIER on NODE A and NODE B using adstpall.sh
Step 6> Copy 'appl' folder recursively from NODE B to NODE A '$COMMON_TOP/clone/'
Step 7> Final step is to run adcfgclone.pl on NODE A.
perl adcfgclone.pl appsTier and pass the parameters as per NODE A respectively.

Thanks
--Guru