EBS 11i/ R12

What is ERP?

ERP stands for enterprise resource planning.
The package which contains application,software and database etc is said to ERP package.

ERP available in the market
===================
1)ORACLE APPS
2)SAP
3)PEOPLESOFT
4)JD EDWARDS
5)RAMCO
6)MARSHALL
7)STRAPUS

The most famous ones are ORACLE APPS(oracle applications from oracle corporation) and SAP.

Oracle apps is more used in finance side.
SAP is more used in manufacturing side.

Oracle apps is bug included and where as SAP bug free.


Single node:
=======
If the database and application services maintained on only one server ,then it is said to be single node.

Mutli node:
=======
If the database and application services are maintained on different servers,then it is said to be mutli node.



========

Difference Between Oracle apps 11i & R12

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:

1. Oracle Applications Release 12 is the latest release in the chain of E-Business Suite Releases by Oracle.
2. This release came up with the new file system model
3. Autoconfig will not write anything in APPL_TOP, COMMON_TOP area in R12.
4. 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

1. Applications Server 9i is replaced by 10g (10.1.3.X)
2. Forms & Reports Version 6i (8.0.6) are replaced by Forms & Reports Version 10g i.e. 10.1.2.X
3. mod_jserv is replaced by oc4j
4. 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.

      if you change apps password  it does not require to change apps password  in any configuratoin file.
      All startup files are in $INST_TOP/admin/scripts .
      While creating Share Appl Top we can keep all other tops as read only except INST_TOP.

          If you want to install R12 on virtual host start rapidwiz as "rapidwiz -servername virtual"
         Just change s_cphost to physical hostname and run autoconfig, otherwise ICM and WF Mailer                       
         container components will have issue while starting.


All about OPMN
=============

In R12 services are managed by OPMN(Oracle process manager and notification server).

OPMN COMPONENTS
==============
OPMN consists of two main components

1) Oracle Process Manager

2) Oracle Notification Server

1)Oracle Process Manager is responsible for below things.
=======================================
1) starting
2) stopping
3) restarting
4) monitoring the services it manages (this includes death detection and automatic restart of the process).


2) Oracle Notification Server

Oracle Notification Server is the transport mechanism for failure, recovery, startup, and other related notifications between components in AS.


Single configuration file(opmn.xml) is used OPMN to manage the services.
Config file location is given as $ORA_CONFIG_HOME/10.1.3/opmn/conf/opmn.xml

To see more in details
========================
http://docs.oracle.com/cd/B13597_05/core.904/b12057/common.htm#CACHJAGG

http://otndnld.oracle.co.jp/document/products/as10g/101300/B25221_03/core.1013/b15976/opmnctl.htm

wonderful document on opmn
==========================
http://isu.ifmo.ru/docs/IAS904/core.904/b12057/intro.htm#1015088

http://otndnld.oracle.co.jp/document/products/as10g/101300/B25221_03/core.1013/b15976/opmnctl.htm


OPMN SERVICES

Services managed by opmn are (grep process-type opmn.xml)

1) HTTP_Server
2) oacore
3) forms
4) oafm


Starting OPMN managed Services

Starting Complete OC4J container
=================================

 ./adopmnctl.sh startproc ias-component=OC4J

Starting individual process-type(s)

./adopmnctl.sh startproc ias-component=OC4J process-type=oafm              
./adopmnctl.sh startproc ias-component=OC4J process-type=forms
./adopmnctl.sh startproc ias-component=OC4J process-type=oacore



Starting HTTP Server (Apache)
     
./adopmnctl.sh startproc ias-component=HTTP_Server

Stoping OPMN managed Services

Stoping Complete OC4J container

./adopmnctl.sh stopproc ias-component=OC4J
   

Stoping individual process-type(s)
       
 ./adopmnctl.sh stopproc ias-component=OC4J process-type= oafm              
 ./adopmnctl.sh stopproc ias-component=OC4J process-type= forms
 ./adopmnctl.sh stopproc ias-component=OC4J process-type= oacore
   

Stoping HTTP Server (Apache)
./adopmnctl.sh stopproc ias-component=HTTP_Server

Benefits of OPMN

OPMN detects the death of the process which it manages and brings up in almost no time.
1) OS process is checked by OPMN for every 2 seconds.
2) forward ping: periodically OPMN pings the process for every 20 seconds and expects response
3) reverse ping: every 20 seconds managed process sends OPMN a ping notification.