Difference between Oracle Apps R12 and 11i

Techstack  

 R12 is certified to be compatible with 10g and 11g databases

 Two Oracle Homes have been introduced in R12  ( ie 10.1.2 and 10.1.3)   (Difference between 2 application oracle home coming soon)

 Webserver in R12 is version 10.1.3 whereas in 11i it is 1.0.2.2.2  
$IAS_ORACLE_HOME/Apache/Apache/bin/httpd -v

Forms version in R12 is 10.1.2.0.2 
$ORACLE_HOME/bin/frmcmp_batch|grep Forms| grep Version

Forms in R12 by default run in servlet mode , whereas in 11i it runs in socket mode.
cat $FORMS_WEB_CONFIG_FILE|grep serverURL=
serverURL=/forms/lservlet

R12 Java proccesses use version > 1.5.0  whereas in 11i it is 1.3 or 1.4
sh -c “`awk -F= ‘$1 ~ /^JSERVJAVA.*$/ {print $2}’ $ADMIN_SCRIPTS_HOME/java.sh` -version;
“java version “1.6.0_10”
Java(TM) SE Runtime Environment (build 1.6.0_10-b33)
Java HotSpot(TM) Server VM (build 11.0-b15, mixed mode)

New Instance top ($INST_TOP) has been introduced in R12 , it stores  configuration and log files and even context file is located in inst_top .  Below table should provide more information. Please note inst_top is recommended to be local on the server and not on san box storage. 

Filesystem

File	Oracle Applications 11i	Release 12
Environment Source file	APPSORA.env	APPS<SID>_<hostname>.env
Context File (middle tier)	$APPL_TOP/admin/$TWO_TASK.xml	$INST_TOP/appl/admin/$TWO_TASK_<hostname>.xml
tnsnames.ora (OH)	$ORACLE_HOME/network/admin/<CONTEXT>	$INST_TOP/ora/10.1.2/network/admin
listener.ora	$ORACLE_HOME/network/admin/<CONTEXT>	$INST_TOP/ora/10.1.2/network/admin
appsweb.cfg	$OA_HTML/bin	$INST_TOP/ora/10.1.2/forms/server
tnsnames.ora (Apache)	$IAS_ORACLE_HOME/network/admin/<CONTEXT>	$INST_TOP/ora/10.1.3/network/admin
zone.properties	$IAS_ORACLE_HOME/Apache/Jserv/etc	$ORA_CONFIG_HOME/10.1.3/j2ee/oacore/application-deployments/oacore/oa_servlets/orion-web.xml  and  …/oacore/html/orion-web.xml (Same file located in both directories)
httpd.conf	$IAS_ORACLE_HOME/Apache/Apache/conf	$ORA_CONFIG_HOME/10.1.3/Apache/Apache/conf
apps.conf	$IAS_ORACLE_HOME/Apache/Apache/conf	$ORA_CONFIG_HOME/10.1.3/Apache/Apache/conf
formservlet.ini	$IAS_ORACLE_HOME/Apache/Jserv/etc	$ORACLE_HOME/forms/server/default.env
topfile.txt	$APPL_TOP/admin	$APPL_CONFIG_HOME/admin
adovars.env	$APPL_TOP/admin	$APPL_CONFIG_HOME/admin
adjborg2.txt	$APPL_TOP/admin	$APPL_CONFIG_HOME/admin
SSL Certificates	$COMMON_TOP/admin/certs	$INST_TOP/certs
AD scripts logs	$COMMON_TOP/admin/log/<SID_hostname>	$LOG_HOME/appl/admin/log
Concurrent Request logs	$APPLCSF	$APPLCSF
Apache logs	$IAS_ORACLE_HOME/Apache/Apache/logs	$LOG_HOME/ora/10.1.3/Apache
Jserv logs	$IAS_ORACLE_HOME/Apache/Jserv/logs	$LOG_HOME/ora/10.1.3/j2ee
javacache.log	$COMMON_TOP/rgf/<SID_Hostname>	$LOG_HOME/appl/rgf

 Look and Feel

 R12 has a different look as compared to 11i , however the navigation and key strokes remain same . There is not much difference that i could see.

 Configurations.

 Configuration related to techstack remains same other than filesystem structure however custom tops that we add in jserv.properties in 11i now goes in default.env located on $INST_TOP/apps/<SID>_<HOSTNAME>/ora/10.1.2/forms/server/default.env

 All entries related to custom top needs to be added in default.env file

 Environment Varaibles

Variable	Oracle Applications 11i	Release 12
APPL_TOP	$HOME/<SID>appl	$HOME/apps/apps_st/appl
COMMON_TOP	$HOME/<SID>comn	$HOME/apps/apps_st/comn
ORACLE_HOME (applmgr)	$HOME/<SID>ora/8.0.6	$HOME/apps/tech_st/10.1.2
IAS_ORACLE_HOME	$HOME/<SID>ora/iAS	$HOME/apps/tech_st/10.1.3
ORACLE_HOME (oracle)	$HOME/<SID>db/10.2.0	$HOME/db/tech_st/10.2.0
ORADATA	$HOME/<SID>data	$HOME/db/apps_st/data
JAVA_TOP, OA_JAVA	$COMMON_TOP/java	$COMMON_TOP/java/classes
OA_HTML	$COMMON_TOP/html	$COMMON_TOP/webapps/oacore/html
FND_SECURE	$FND_TOP/secure/<SID>	$INST_TOP/appl/fnd/12.0.0/secure
ADMIN_SCRIPTS_HOME	$COMMON_TOP/admin/scripts/<SID>	$INST_TOP/admin/scripts
LOG_HOME	–	$INST_TOP/logs
FORMS_WEB_CONFIG_FILE	–	$INST_TOP/ora/10.1.2/forms/server/appsweb.cfg
AF_JLIB	–	$COMMON_TOP/java/lib
JAVA_BASE	–	$COMMON_TOP/java
INST_TOP	–	$HOME/inst/apps/<CONTEXT>
ORA_CONFIG_HOME	–	$INST_TOP/ora
APPLCSF	$COMMON_TOP/admin	$LOG_HOME/appl/conc

 

 

Have tried to consolidate information available in parts and pieces ,  please feel free to share more information so that same can be added to maintain information at single location. Have a great day ahead…