User's Guide

1. The Oracle RDBMS and database tools rely on an ORA_NLS[<nls_version>] setting that refers to
NLS files that are compatible to the version of the RDBMS. Oracle 9.x needs NLS files as delivered
with Oracle 9.x.
2. The SAP executables rely on an ORA_NLS[<nls_version>] setting that refers to NLS files of the
same versions as those that were used during kernel link time by SAP development. This is not necessarily
identical to the installed database release.
The Oracle database server and SAP server might need different types of NLS files. The server NLS files are
part of the database Serviceguard package. The client NLS files are installed locally on all hosts. Special
care has to be taken to not mix the access paths for ORACLE server and client processes.
The discussion of NLS files has no impact on the treatment of other parts of the ORACLE client files. The
following directories need to exist locally on all hosts on which an Application Server might run. They can
not be relocated to different paths. The content needs to be identical to the content of the corresponding
directories that are shared as part of the database SGeSAP package. The setup for these directories follows
the "on top" mount approach, i.e., the directories might become hidden beneath identical copies that are
part of the package:
$ORACLE_HOME/rdbms/mesg
$ORACLE_HOME/oracore/zoneinfo
$ORACLE_HOME/network/admin
Table 2-8 File System Layout for NFS-based Oracle Clusters
Device Minor
Number
Volume Group
Name
VG TypePotential Owning
Packages
Access
Point
Mount Point
db instance
specific
dbci<DBSID>
jdb”<DBSID”
jdbjci<DBSID>
dbcijci<DBSID>
shared disk$ORACLE_HOME
/oracle/<SID>/saparch
/oracle/<SID>/sapreorg
/oracle/<SID>/sapdata1
...
/oracle/<SID>/sapdatan
/oracle/<SID>/origlogA
/oracle/<SID>/origlogB
/oracle/<SID>/mirrlogA
/oracle/<SID>/mirrlogB
environment
specific
nonelocal/oracle/client
db instance
specific
nonelocalsome local Oracle client files reside in
/oracle/<SID> as part of the root
filesystem
Oracle Real Application Clusters
Oracle Real Application Clusters (RAC) is an option to the Single Instance Oracle Database Enterprise
Edition. Oracle RAC is a cluster database with shared cache architecture. The SAP certified solution is based
on HP Serviceguard Cluster File System for RAC.
Handling of a RAC database is not included in SGeSAP itself. RAC databases are treated by SGeRAC and
Oracle tools, which integrate with SGeSAP. The configuration of SGeSAP packages for non-database
components is identical to non-RAC environments.
NOTE: The configurations are designed to be compliant to SAP OSS note 830982. The note describes
SAP recommendations for Oracle RAC configurations. A support statement from SAP regarding RAC clusters
on HP-UX can be found as part of SAP OSS note 527843. A current support statement in note 527843 is
required, before any of the described RAC options can be implemented. The note maintenance is done by
28 Planning the Storage Layout