INST_TOP

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 more easy 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.

  •  To create a new instance that shares an existing middle-tier, just create a new instance_top with proper config files and NFS Mount the middle tier

INSTANCE TOP - STRUCTURE

$INST_TOP: $APPS_BASE/inst/apps/$CONTEXT_NAME/

/admin

        /scripts                     :  ADMIN_SCRIPTS_HOME: Find all AD scripts here

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/appl                                  :  APPL_CONFIG_HOME. For standalone envs, this is set to $APPL_TOP

        /fnd/12.0.0/secure    : FND_SECURE: dbc files here

        /admin                       : All Env Config files here

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/certs                                 : SSL Certificates go here

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/logs                                  : LOG_HOME: Central log file location. All log files are placed here (except adconfig)

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/ora                                   : ORA_CONFIG_HOME

        /10.1.2                      : 'C' Oracle home config, Contains tnsnames and forms listener servlet config files

       /10.1.3                       : Apache & OC4J config home, Apache, OC4J and opmn

                                    This is the 'Java' oracle home configuration for OPMN, Apache and OC4J

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/pids                           : Apache/Forms server PID files here

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/portal                         : Apache's DocumentRoot folder

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