Managing Serviceguard Extension for SAP on Integrity Linux, December 2005

Understanding Serviceguard Extension for SAP on Integrity Linux

Planning the LVM Layout for Clustered SAP Environments

Chapter 124

Oracle LVM Layout

All ORACLE server directories reside below /oracle/<DBSID>. These

directories get shared via the database package.

In addition, any SAP Application Server needs access to the Oracle client

libraries, including the Oracle National Language Support files (NLS)

shown in Table 1-2. The default location to which the client NLS files get

installed differs with the SAP kernel release used:

It is important to notice, that there always is a second type of NLS

directory, called the “server” NLS directory. It gets created during

database or SAP Central System installations. The location of the server

NLS files is identical for all SAP kernel versions:

$ORACLE_HOME/ocommon/nls/admin/data.

The setting of the ORA_NLS[<nls_version>] variable in the

environments of <sid>adm and ora<sid> determines whether the client

or the server path to NLS is used. The variable gets defined in the

.dbenv_<hostname>.[c]sh files in the home directories of these users.

During SGeSAP/LX IPF installation it is necessary to create local copies

of the client NLS files on each host to which a failover could take place.

SAP Central Instances use the server path to NLS files, while

Application Server Instances use the client path.

Sometimes a single host may have an installation of both a Central

Instance and an additional Application Server of the same SAP System.

These instances need to share the same environment settings. SAP

recommends using the server path to NLS files for both instances in this

case. This won't work with SGeSAP/LX IPF since switching the database

would leave the application server without NLS file access.

Table 1-2 NLS Files Default Location

Kernel Version Client NLS Location

<=4.5 $ORACLE_HOME/ocommon/NLS[_<nls_version>]/admin/data

4.6 /oracle/<rdbms_version>/ocommon/nls/admin/data

6.x /oracle/client/<rdbms_version>/ocommon/nls/admin/data