Managing Serviceguard Extension for SAP, December 2007

Step-by-Step Cluster Conversion
Database Configuration
Chapter 3190
Additional Steps for DB2
DB1030 DB2 Database Step:
DB2 installs the DB2 executables on local disks below /opt.
It is necessary to install a copy of the DB2 executables on all nodes where
the package containing the database may run. It is important to
synchronize the patch level of the DB2 executables whenever installing
fixes. The executables should be installed using the DB2 installer
because DB2 checks the version when starting the DB server. This
version checking is based on OS-swinstall routines in HP-UX. The
executable should be installed with the following command: db2setup
for the standard executables. Use the installFixpak command for the
installation of the required fix pack. Details about installing and
diskspace requirements can be found in SAP Installation on UNIX –
IBM DB2 UDB Installation for UNIX.
DB1040 DB2 Database Step:
During the DB2 installation the client libraries are placed locally on the
node in /db2/db2<sid>. The corresponding SAP application needs
access to this client directory in order to connect to the DB/2 database.
This means, if the database is relocated to another node or if the
database package runs on a different node other than the central
instance, this client directory needs to be available. Therefore the client
directory is required to be copied locally on each node, where the DB2
database is able to run.
The installation of an administration client should be performed
following the appropriate steps in the SAP Installation on UNIX – IBM
DB2 UDB Installation for UNIX documentation. Make sure that you
only select DB2 UDB Administration Client on the Install DB2 screen
and select Do not create any Database Instances.
DB1050 DB2 Database Step:
A DB2 database instance controls one or more DB2 databases. To gain
access to a database, a user has to have access to a local database
instance before accessing a local or remote database. The database
instance used for the connection request is determined by the
environment variable DB2INSTANCE, and the database to connect to
has to be cataloged (i.e. registered, see example below) in this local
database instance.