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

Serviceguard Extension for SAP on Linux Cluster Administration
Change Management
Chapter 5 213
SAP Software Changes
During the configuration of SAP on Serviceguard Extension for SAP on
Linux the SAP profiles (with kernel <7.0) are modified to contain only
virtual IP address instead of the initial physical IP addresses. This can
be checked using SAP transaction RZ10. In the DEFAULT.PFL these
entries are altered:
SAPDBHOST= <relocatible_db_name>
rdisp/mshost= <relocatible_ci_name>
rdisp/vbname= <relocatible_ci_name>_<SID>_<INR>
rdisp/enqname= <relocatible_ci_name>_<SID>_<INR>
rdisp/btcname= <relocatible_ci_name>_<SID>_<INR>
rslg/collect_daemon/host = <relocatible_ci_name>
There are also two additional profile parameters SAPLOCALHOST and
SAPLOCALHOSTFULL included as part of the Instance Profile of the
Central Instance. Anywhere SAP uses the local hostname internally, this
name is replaced by the relocatable values <relocatable_ci_name> or
<relocatable_ci_name>.domain.organization of these parameters.
Make sure that they are always defined and set to the correct value. This
is vital for the system to function correctly.
Relocatable IP addresses can be used as of SAP kernel 6.40. Older
releases use local hostnames in profile names and startup script names.
Renamed copies of the files or symbolic links had to be created to
overcome this issue.
The SAP Spool Work Process uses the SAP Application Server name as
the destination for print formatting. Use the relocatable name if you plan
to use Spool Work processes with your Central Instance. In the case of a
failover the SAP print system will continue to work.