Managing Serviceguard Extension for SAP on Linux (IA64 Integrity and x86_64), February 2008

Step-by-Step Cluster Conversion
Database Configuration
Chapter 3170
Create a /etc/services entry for the new port you specified above. Use
tlisrv<SID2> as service name. The name is not needed anyhow. This
entry has to be made on all hosts that run an instance that belongs to the
system. This includes all external application server hosts outside of the
cluster.
OR900 Optional Step:
If you use multiple packages for the database and SAP components:
Set the optional parameter SQLNET.EXPIRE_TIME in sqlnet.ora to a
reasonable value in order to take advantage of the Dead Connection
Detection feature of Oracle. The parameter file sqlnet.ora resides
either in /usr/sap/trans or in $ORACLE_HOME/network/admin.
The value of SQLNET.EXPIRE_TIME determines how often (in seconds)
SQL*Net sends a probe to verify that a client-server connection is still
active. If the Central Instance switches, the application servers may
crash, thereby leaving shadow processes running on the database host.
While the Central Instance package cleans up the application server
hosts, it does not touch the ORACLE shadow processes running on the
database host. Remove them, because their number increases with every
Central Instance package switch. After an application server crash, a
connection to the database shadow process may be left open indefinitely.
If the SQLNET.EXPIRE_TIME parameter is specified, SQL*Net sends a
probe periodically to determine whether there is an invalid connection
that should be terminated. It finds the dead connections and returns an
error, causing the server process to exit.
OR910 Oracle Step:
Additional steps for Oracle 8.1.x RDBMS:
The sapbackup directory needs to be in $ORACLE_HOME/sapbackup. If
you are using an Oracle 8.1.x DB the $ORACLE_HOME directory is set to
/oracle/<SID>/8.1.x whereas the sapbackup directory is still placed
/oracle/<SID>/sapbackup. It's best practice to create the symbolic link
$ORACLE_HOME/sapbackup -> /oracle/<SID>/sapbackup.