Overview of R12 Tech Stack Changes:-
The mid tier technology had a boost up in R12, continual improvement with changing technology. Here are the conversion of tech stack from 11i to R12.
Application Server: 1.0 —-> 10.1
Servlet Container: Jserv —-> OC4J
Apache: 1.3.19 —-> 1.3.31 (or 2.0)
Forms: 6 —-> 10
What’s new in Forms:-
+ Forms Servlet Mode is default. Socket Mode supported
+ Forms Trace
- Replacement for FRD.
- Events based with the concept of trace groups.
- Ability to record debugging and performance data.
- Two step process
1) Activate/Record .trc file which is binary and is not port specific.
2) Translate to provide XML or HTML output
.OAM provides “automated” translation.
.Manual command line translation through Xlate utility.
- Enabled via URL by passing ?record=forms&tracegroup=<tracegroup> or from Start Trace in OAM
+ Updated Swan UI
+ FORMS_ environment variables replace FORMS60_.
+ New environment variables e.g. FORMS_TRACE_DIR.
+ Generation tools are delivered as part of the Runtime Services and Developer Suite installations.
+ frmcmp.sh and frmcmp_batch for generation.
+ Modify the shell script to customize settings.
+ frmbld.sh to replace f60desm.
.
Instance Home - structure: -
/<sid>/inst/<context_name> ($INST_TOP)
$INST_TOP/admin/scripts ($ADMIN_SCRIPTS_HOME)
$INST_TOP/appl ($APPL_CONFIG_HOME)
$INST_TOP/fnd/12.0.0/secure ($FND_SECURE)
$INST_TOP/certs
$INST_TOP/logs ($LOG_HOME – autoconfig writes logs here by default)
$INST_TOP/ora ($ORA_CONFIG_HOME)
$INST_TOP/ora/10.1.2
$INST_TOP/ora/10.1.3 ($ORACLE_CONFIG_HOME)
$INST_TOP/pids
$INST_TOP/portal
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Good hands-on exercises (installation, patching, cloning), very experienced trainer worth for Money 
4 users commented in " R12 Changes from 11i "
Follow-up comment rss or Leave a TrackbackGood quick reference material.
Thanks rupesh its very good quick reference for attending interviews.
by
lakshmi
Good stuff for interviews>
Thanks, lets see if we can put more micro level changes.
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