Difference Between Oracle apps 11i & R12

Summary of Changes

Component	Release 11i	Release 12
Database	9.2	10.2
Developer	6i	10i
Application Server	1.0	10.1
Client Plug-in	Jinitiator	SUN JRE
Java Containers	Jserv	OC4J

Changes in Detail

APPMGR
	OLD	NEW
APPL_TOP	$HOME/<SID>appl	$HOME/apps/apps_st/appl
COMMON_TOP	$HOME/<SID>comn	$HOME/apps/apps_st/comn
ORACLE_HOME	$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
	OLD	NEW
ORACLE_HOME	$HOME/<SID>db/10.2.0	$HOME/db/tech_st/10.2.0
ORADATA	$HOME/<SID>data	$HOME/db/apps_st/data
INST_TOP (New Addition)
	OLD	NEW
INST_TOP	NA	$HOME/inst/apps/<context_name>

What’s new in Oracle Apps R12
Key points to Note:

Oracle Applications Release 12 is the latest release in the chain of E-Business Suite Releases by Oracle.

This release came up with the new file system model

Autoconfig will not write anything in APPL_TOP, COMMON_TOP area in R12.

All instance specific configurations, log files are written in INST_TOP area. This home provides the ability to share Applications and technology stack.

R12 new features

Applications Server 9i is replaced by 10g (10.1.3.X)

Forms & Reports Version 6i (8.0.6) are replaced by Forms & Reports Version 10g i.e. 10.1.2.X

mod_jserv is replaced by oc4j

Java/ JDK version 1.3.X or 1.4.X will be replaced by JDK 1.5.X

Techstack Components Changes

Database (RDBMS_ORACLE_HOME) - 10.2.0.2

FORMS ORACLE_HOME (8.0.6 ORACLE HOME equivalence) - 10.1.2

OC4J_ORACLE_HOME (iAS ORACLE_HOME equivalence) - 10.1.3

File system level changes

A new top INSTANCE_TOP is introduced in Release 12 for configuration and log files along with the other TOP's in existing in 11i.

All instance specific configurations, log files are written in INST_TOP area.

This home provides the ability to share Applications and technology stack.

What is INSTANCE TOP

Instance home is the top-level directory for an applications instance which is known as Instance Home and is denoted the environment variable $INST_TOP.

This contains all the config files, log files, SSL certificates etc.

Advantages of new INSTANCE HOME

The additional Instance Home makes the middle tier easier to manage and organized since the data is kept separate from the config files.

The Instance Home also has the ability to share the Applications and Technology stack code across multiple instances.

Another advantage of the Instance Home is that the autoconfig writes only in INST_TOP so APPL_TOP and ORACLE_HOME can also be made read only file system if required