SGeSAP Administration With HP Somersault Enabled

The administration of the SAP R/3 cluster is slightly different when HP Somersault is configured. In a failover scenario, for example, if the Central Instance (CI) host crashes and the CI switches over to the backup node, the HP Somersault protected enqueue service remains on the server set nodes. When the CI restarts on the backup node the work processes reconnect to the enqueue service.

For maintenance reasons it might be necessary to shutdown the complete SAP R/3 system.

To shutdown the SAP R/3 system, including the complete CI and the HP Somersault unit, type:
cmhaltpkg dbciPKG/ciPKG
This is the only time when the HP Somersault unit dumps its in-memory Enqueue table to the backup file ENQBCK in /usr/sap/<SID>/SYS/global.
To startup the SAP R/3 system, including the complete CI and the HP Somersault Enqueue unit, type:
cmrunpkg dbciPKG/ciPKG
It is essential to have the Enqueue backup file ENQBCK located in /usr/sap/<SID>/SYS/global.

To enable HP Somersault:

Place the Enqueue backup file where the HP Somersault system can find it: /usr/sap/<SID>/SYS/global/ENQBCK.
/usr/sap/<SID>/SYS/global is usually linked to /sapmnt/<SID>/global. All valid backup files must be moved there.
Follow the procedures in Step Title not available.
Edit the SAP R/3 profile: /usr/sap/<SID>/SYS/profile/DEFAULT.PFL.
Add the following two lines:
ENHA_Identifier =$(SAPSYSTEMNAME)_HPSOM_ENQUEUE enque/process_location =REMOTEHA

To disable HP Somersault:

Place the Enqueue backup file to the SAP R/3 specified location.
Follow the procedures in Step Title not available.
Edit the SAP R/3 profile: /usr/sap/<SID>/SYS/profile/DEFAULT.PFL.
Remove the following two lines:
ENHA_Identifier =$(SAPSYSTEMNAME)_HPSOM_ENQUEUE enque/process_location =REMOTEHA

For additional information on the administration of HP Somersault refer to your HP Somersault documentation.

SGeSAP Administration With HP Somersault Enabled

Technical documentation

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