10.5.1 How to Install SAP and the Database

1. Verify that you have completed all tasks listed in "10.4 Preparing the SAP Environment".

2. Verify that all nodes are running in the cluster.

3. Switch over all logical hosts to the node from which you will install SAP and the database.

   # scadmin switch clustername phys-hahost1 CIloghost DBloghost ...

4. Create the SAP installation directory and begin SAP installation.

   Refer to the "R/3 Installation on UNIX" guidelines in the SAP documentation for details.

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   Note -

   Read all SAP OSS notes prior to beginning the SAP installation.

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   1. Install the central instance and database instance on the node currently mastering the central instance and database instance logical host.

      (For SAP 3.1x only) When installing SAP using R3INST, specify the physical host name of the current master of the database logical host when prompted for "Database Server." After the installation is complete, you must manually adjust various files to refer to the logical host where the database resides.

      (For SAP 4.0x only) When installing SAP using R3SETUP, select the CENTRDB.SH script to generate the installation command file.

   2. Continue the SAP installation to install the central instance, to create and load the database, to load all reports, and to install the R/3 Frontend (GUI).