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For Apps DBA Beginner's
  • Start From Here
  • Order of Apps Study
  • 11i Software
  • Apps Architecture
  • Install Apps 11i
  • Install Apps 11i Part II
  • Startup/Shutdown
  • Request Flow in Apps
  • Various TOP's
  • Cloning Basics
  • Cloning I
  • Cloning II
  • Autoconfig Basics
  • Autoconfig Config File
  • Template Files in Autoconfig
  • Discoverer Overview
  • Workflow Mailer in Apps
  • Printing Overview
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  • Step by Step build RAC part II
  • Step by Step install RAC using VMWare part III
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  • 25 things your DBA should know for Apps/SSO integration
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  • We have moved to kindly check http://onlineAppsDBA.comin future
    Apps Architecture
    Tuesday, August 08, 2006
    Register for R12 upgrade
    This Topic is quite important and I recommend you to go through this thoroughly.
    First I want to discuss terminology which you will encounter here & in most of Oracle Documentation.

    Server - is a process or group of processes and provides a particular functionality/service For example, Database Server listen and process database requests, similarly Web Server listens for and processes HTTP requests.

    Tier - is a logical grouping of services, may be on single machine or spread across more than one physical machine. For Example, Middle Tier in Oracle apps consist Form,Web,Report...Services. Forms & Report can be one machine 1 & Web Server can be on machine 2, still they will be part of same tier called as Application Tier or Middle Tier.

    Node - is referred as Machine, Each tier may consist of one or more node and each node can potentially have more than one tier.

    Desktop Tier - Oracle Applications/E-Business Suite is built on three tier Architecture with first Desktop Tier ic client machines accessing applications via browser(HTML based Self service applications) or Java Applet(Jinitiator) for Form based interface.

    Application/Middle Tier - Second is Application Tier also called as middle tier consists of WebServer Forms, Reports, Concurrent processing, Discoverer and Admin Server. I suppose its known as Middle tier because it lies between our desktop & third tier called database tier.

    Database Tier - Third is Database Tier contain Orale database server which store all your application data. I am sure if you are DBA you know it :)

    About Architecture of Individual Component like , Web Server, Form Server .... I will cover in my future posts.

    Now you can raise your doubts/questions/issue in forum at (Dedicated to Apps DBA's)

    Happy Apps Learning .
    Oracle Apps DBA

    We have moved to

    kindly check in future

    add to  ¦  digg thisDigg This  ¦  My Yahoo!My Yahoo  ¦  RedditReddit  ¦  add to BlinkListBlinkList   ¦  Furl ItFurl It  ¦  Email This Email This  ¦     Leave Your Comments
    posted by Atul Kumar @ 9:29 PM  
    • At 4:37 AM, Anonymous Anonymous said…

      Very helpful. Thanks and keep the good work.

    • At 4:38 PM, Anonymous Anonymous said…

      Outstanding and perfectely timed , as many DBA's are desperately looking for precise and up to mark contents and you have kept exactly those here .

    • At 4:40 PM, Blogger Atul Kumar said…

      Thanks a lot.
      Could you please leave your name as well as its good to know everybody here .

      Shoot a mail on topics which you don't see here & want to hear about in Apps.


    • At 1:12 PM, Anonymous muralidhar said…

      hi this is fine


    • At 5:35 PM, Anonymous Anonymous said…

      Nice blog for Oracle Apps DBAs.

      Sabdar Syed,
      Oracle Apps DBA.

    • At 5:54 PM, Blogger Atul Kumar said…

      Thanks a lot .

      Atul Kumar

    • At 12:09 PM, Anonymous Anonymous said…

      I have a doubt here. While sharing ans app tier, whats the expected behaviour? will all the services come up on both the nodes if i have enabled all the services on both the nodes? will there be 2 diff web entry points???

    • At 12:20 PM, Blogger Atul Kumar said…

      Hi Anonymous,
      If you have two middle tiers (on two servers) you will end up having two web entry & last installed will be final web entry stored in database.

      In order to overcome this problem you have to use load balancer & use virtual host as webentry URL

      Do let me know if you have any further doubt. Check implementing HTTP hardware Load balancer to understand it more

    • At 12:18 PM, Anonymous Anonymous said…

      Oh... so if suppose i am enabling all the services on both nodes of a 2 node installation, then both the login urls should work ideally....or only the one where autoconfig was run recently will work... please clarify

    • At 1:40 PM, Blogger Atul Kumar said…

      Yes both will work but if you shutdown services on middle tier installed last , forms won't work as ICX forms launcher at site level will point to last installed middle tier


    • At 12:28 AM, Blogger adusumilli_nitesh said…

      wow..that was terrific..keep up the good work

    • At 7:35 AM, Blogger Atul Kumar said…

      Thanks Nitesh

    • At 9:56 AM, Blogger Shekinah said…

      Hi Atul,

      Your site is really very helpful. Wow! Really good work.
      I was working as an Apps DBA Oracle India. However, currently for 6 months I have'nt got the right job as an Apps DBA in another country just because people ask for certification here and its too expensive for me. i wonder how i'll find my way thru this. But, this site of your gives me lots of information.


    • At 10:00 AM, Blogger Atul Kumar said…

      Thanks a lot for your comments & feedback.

      If you wish to move out from India to work in other country , I think biggest challeneg is to get work permit for specific country .

      If you wish to come to UK I will share my experience & things one should do start here independently . Stay tuned


    • At 8:42 AM, Blogger Shekinah said…

      Thanks for a prompt response!! India is a very forward with IT-Jobs and no doubt anyone will get a job there. However, I have a residence visa and have moved to UAE. So, searching for an apps job right here currently. Thanks for being kind in offering me your suggestions. Indeed every post of yours is pin point "CLEAR" and helpful.


    • At 9:26 PM, Anonymous Anonymous said…

      Hi Atul,

      Is it possible to configure TAF(RAC) in 11i Apps Env.

      Thanks & Regards,

    • At 10:02 PM, Anonymous Anonymous said…

      Hi Atul,

      I have very less exp as an apps dba as compared to you but would like to know is it possible to configure TAF(RAC) on 11.5.10
      Thanks for the help


    • At 7:29 AM, Blogger Atul Kumar said…

      Hi ASD,
      Quite good question , We can configure TAF for 11.5.10 with RAC for database & another middle tier for application tier but that is not truely transparent as exisitng used will definately disconnected & has to reconnect but I suppose oracle might improve this on R12 which are with OC4J where user sessions can be transparently failed to another OC4J & another node if DB goes down

    • At 7:34 AM, Anonymous Anonymous said…

      are u aware of AD features like java_worker,code_level,schema_swap etc???could you please let me know what are these and why are they used?
      what would happen if we will enable or disable these features?

    • At 6:12 AM, Anonymous Anonymous said…

      i am waiting for your reply on ad features...

    • At 2:57 PM, Anonymous Anonymous said…

      Excellent site for Oracle Apps DBAs keep it up.
      Oracle Apps DBA
      Warwickshire County Council

    • At 6:30 PM, Anonymous Anonymous said…


      I have to configure failover for dbnode which is on a package hosted on a VNC cluster of four servers. I have run adfgclone and have used the virtual hostname for this. But when I try to connect to database using applmgr login it says ORA-12224: TNS:no listener.
      Please help.


    • At 7:22 PM, Blogger Atul Kumar said…

      For any issues raise them in forum at

    • At 11:09 AM, Anonymous Anonymous said…


      All your effort makes so many people life brighter. Thanks.

      presently we have two node installations for oracle apps ebusiness suite

      apps/db server running in sun solaris / 11.5.7 /dbs 8.1.7

      we are planning to create a new environment as mentioned below.

      apps - os linux - apps 12i
      db - sun solaris - db 10g rel2

      how to go about this setup and any documents we can follow as step by step to complete this project.


    • At 11:19 AM, Blogger Atul Kumar said…

      This can be achieved by Upgrading database to 10g and apps to R12.

      For upgarding database in preperation to R12 visit

      For full R12 Upgarde visit

      Oracle Applications Upgrade Guide: Release 11i to Release 12 (zipped)

    • At 7:03 AM, Blogger Ahmed Khan said…

      Hi Atul.

      I am Ahmed Khan working saudi Arabia this site is really very good.

      Thank u

    • At 7:06 AM, Blogger Ahmed Khan said…

      Hi Atul.

      I am Ahmed Khan this site is really very good.

    • At 8:41 AM, Blogger Atul Kumar said…

      Thanks Ahmed

    • At 8:42 AM, Anonymous Anonymous said…

      Hi Atul

      I am having 120GB external USB Harddisk can i install Linux and oracle apps in that?

      Ahmed Khan

    • At 9:21 PM, Blogger Atul Kumar said…

      Yes you can install 11i Apps but not R12 Vision

    • At 2:57 PM, Anonymous Anonymous said…

      Hi Atul

      I am having Linux 4 CD's so can i install Linux in virtual machine with cd's coz i want to use Windows and also at the same time Linux and also i want to install oracle apps this all i want to do on Extrnal USB harddisk so can i?

      Ahmed khan

    • At 7:38 PM, Blogger Atul Kumar said…

    • At 12:54 PM, Anonymous Anonymous said…

      Hi Atul

      What file system should is use for External USB Disk so that i can use it on windows n also i need to install Linux.Actually 100 GB i want to give to Linux & oracle and 20 GB i want use it as my personal drive to keep my personal data.

      Ahmed Khan

    • At 11:35 AM, Anonymous Anonymous said…


      Please,Can any one one answer the above question.

      Ahmed Khan

    • At 6:27 PM, Blogger Atul Kumar said…

      Use NTFS and for any issues/ questions raise them in forum at

    • At 5:37 AM, Blogger sunil said…

      really u blog help me a lot....i need
      workflow for APPS user login in OAM

    • At 3:58 PM, Anonymous Anonymous said…

      In our system I have about 30 java processes that I think are opp related. As they have a logfile pointing to FNDOPP5176465.txt.

      I only have OPP configured with 1 target process and 5 threads person process.
      Why are there that many java processes.

      Also there are a lot of processes which are pointing to a logfile FNDCPGSC5176464.txt. Is this workflow related?

      How do I control the above number of these processes. Does each one consume a lot of memory?


    • At 2:30 AM, Anonymous indy said…

      Hi Atul
      First of all I would like to appreciate your sharing tendency .. I used to visit your site to read but first time asking a question.
      With your site's helpI have installed VMWare on top of Window Vista in my home machine. I created two vitual machines and installed Oracle Linux in both. Now I want to practice installing RAC,R12 etc but not sure how to get display. Could you please help me? Is there any free softwares to get display.


    • At 6:12 AM, Blogger Jitendra said…

      Hi Atul,

      It's greatful help for people like me who want to become apps dba.


    • At 5:02 AM, Blogger Santosh said…

      Hi Atul,

      I have been readin ur blogs and are very useful to gain knowledge.

      I am a technical consultant, and want to become an APPS DBA. Is this possible and if YES then please uide me the right way. I am 4m INDIA.

    • At 5:06 AM, Anonymous Anonymous said…

      Hi atul,

      I am apps technical consultant and want to switch to APPS DBA. Is it possible and how?


    • At 7:52 AM, Blogger Nancy kapur said…

      Hi Atul,

      I am new the Apps DBA stuff.
      I have joined oracle as an Apps DBA. Please help me out on how can I start clearing my basics on Oracle Apps. Its Architecture and stuff like that.


    Post a Comment
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