Hi
Our project is installing a number of SAP products (ECC, SRM, Sourcing, etc) across a number of environments (development, test, training, etc). We plan to deploy the database components of all these systems using a RAC cluster on an Oracle Exadata machine running Oracle 11.2.
Executing the "hostname" command on the Exadata box returns a long fully qualified domain name that is longer than 13 characters. To get around this, and to isolate the installation from the underlying physical hostname, we plan on using virtual hostnames (as described in SAP note 962955), but we are unsure of the best approach.
Should we configure a virtual hostname for each installation of each product for each RAC node? This will lead to a multitude of virtual hostnames (~100), but offer us maximum flexibility. Due to our network deployment, this might also require additional network configuration (routing, VLAN configuration, etc).
Or should we configure just a single virtual hostname for each node? This would be the minimum number of virtual hostnames required.
Or do we not need virtual hostnames at all? Does RAC and the Oracle Scan Listener offer a similar capability.
Any insight on this topic would be appreciated.
Thanks