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Former Member

Need advise when install a Distribute System

I want to install SAP ERP 2005 SR2 ABAP (Oracle) on Linux such as Distribute System

I have two server so called server A and server B

I read document for Installation Guides but I donu2019t understand following issue :

And my questions :

When I run ./SAPINST -> SAP ERP 2005 SR2 -> SAP System -> Oracle -> Distribute Sysem -> Based On AS ABAP include

+ Global Host Preparation

+ Database Instance

+ Central Instance

Question 1: I donu2019t understand concept Global Host Preparation ? Itu2019s purpose ?

Question 2:I donu2019t know where Global Host Preparation install (sever A or server B)?

And then where Database Instance install (Server A or Server B)?

And finally Central Instance (Server A or Server B)?

Question 3: When install a Distribute System completely, do I need to install more a Dialog Instance ?

thanks for your advise ....

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3 Answers

  • Oct 22, 2009 at 09:37 AM

    >>Question 1: I donu2019t understand concept Global Host Preparation ? Itu2019s purpose ?

    Global host is nothing just CI in a distributed environment. Its called globalhost becuase this host should be accessed by DB and DI server also, so the kernel directory and trasn directory is global directory of this server as per my understanding.

    >>Question 2:I donu2019t know where Global Host Preparation install (sever A or server B)?

    Server A

    >>And then where Database Instance install (Server A or Server B)?

    Server B

    >>And finally Central Instance (Server A or Server B)?

    Server A

    >>Question 3: When install a Distribute System completely, do I need to install more a Dialog Instance ?

    >>thanks for your advise ....

    Nope. If the hardware is not enough to handle the user request then only you will have to install a dialog instance.

    Regards,

    Subhash

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    Former Member
    Oct 22, 2009 at 05:28 PM

    Hi

    In the model Distribute System, i have more any questions following :

    Question 4: Can i install Central Instance and Database Instance in the same server (ex: server B) ?

    Question 5: If i install Central Instance and Database Instance in the same server (ex: server B), On the server A - Do I can install more a Dialog Instance or a Central Instance ? Does Central Instance exist unique ?

    Question 6: Can i install Central Instance and Dialog Instance in the same server (ex: server A) ?

    Question 7: When Central Instance doesn't start, but Dialog Instance and Database Instance had started -> can client login to SAP system ?

    thanks for your advise

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    • Former Member Gautam Poddar

      Dispatcher is persent on every instance!!

      So if your global Host is up , you got message server and when any of the instance is up, you got a dispatcher.... what else do u need to connect!!!!

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    Former Member
    Oct 23, 2009 at 04:41 AM

    Hi !

    After installation a Distribute System on Server A, B completely, so called Site Primary. For any reason, Site Primary down. For this reason, I want to setup a difference site in another place, so called Site Standby (standby for Site Primary). In this Site Standby, I have two server, so called server C and D. And my questions

    Question 8: On server D - I want to setup a standby database Oracle for server B (server B is primary database). Can I do it ? How by ? for example: I install more a Database Instance with anythings same server B (etc u2026 DBSIDu2026)?

    Question 9: And finnally, on server C, I install a Central Instance with anythings same sever A. Can I do it ?

    Thanks your advise

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    • Former Member

      Hi

      The concept that you are trying to use is High Availability System. There is a difference between HA system and a distributed system. You separate SAP components in Distributed system for sake of administration and hardware load. It noway provides you high availability option. whereas a HA model has distributed systems within it but they are also highly available as per your requirement.

      SAP supports HA model but you have to get that solution from certified vendors like microsoft, HP etc. You will need to have all essential components (DB, SCS,ASCS) on cluster so that if one node is down, services will be automatically start on other. That concept is totally different and so is the approach.

      Kindly be more specific on your requirement. The more I see into it, the more I feel that you are searching for Cluster fundamental in distributed systems which is wrong.

      Regards,

      Javed