Application file system.

The DATA or DATA_TOP directory is located on the database server machine, and contains the system tablespaces, redo log files, data tablespaces, index tablespaces, and database files.

The DB directory is located on the database server machine, and contains the ORACLE_HOME for the Oracle9i database.

The APPL or APPL_TOP directory contains the product directories and files for Oracle Applications.

The ORA directory contains the ORACLE_HOMEs for the Applications technology stack components.

The COMN or COMN_TOP (or COMMON_TOP) directory contains directories and files used across products.

How to Start ICM

When the ICM is initiated on UNIX, the $FND_TOP/bin/startmgr program is
invoked. This calls $FND_TOP/bin/batchmgr, which then:

1. Starts a shell process

2. Starts the ICM process using the command FNDLIBR, with startup parameters
FND, CPMGR, and FNDCPMBR

3. Creates log files (std.mgr and wnnn.mgr) in $APPLCSF/$APPLLOG

To Check ICM Status

Concurrent Manager to specific to see currently running in unix note using the below cmd.
ps –ef grep FNDLIBR
ps –ef grep FNDSM

Types of Concurrent Manager

Types of Concurrent Manager:

ICM:
The Internal Concurrent Manager control all other concurrent managers. It’s admin purpose STARTUP/SHUTDOWN of managers & monitor process of failures.

ICM does not process the concurrent request.

CRM:

The Conflict Resource Manager enforce rules of incompatible concurrent manager request do not run the same conflict domain.

As with internal concurrent manager, the basic CRM definition should not be changed but we can modify SLEEP TIME for each work shift.

SM:

The Standard manager accepts any concurrent request.

TM:

The transaction manager support synchronous request processing।

FND_CONCURRENT_REQUESTS

-Details of user requests, including status, start date, and completion date

FND_CONCURRENT_PROGRAMS

-Details of concurrent programs, including execution method, whether the program is constrained, and whether it must be run alone.

FND_CONCURRENT_PROCESSES

-Cross-references between concurrent requests and queues, and a history of concurrent manager processes

FND_CONCURRENT_QUEUES

-Information about each of the concurrent manager queues