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|Oracle Solaris Cluster Data Service for SAP Web Application Server Guide Oracle Solaris Cluster|
Relational database management system (RDBMS)
ABAP engine component
ABAP engine component and add-in SAP J2EE engine component
Standalone SAP J2EE engine component
If the configuration includes both the ABAP engine and the SAP J2EE engine, two SAP central services components exist.
Caution - For a detailed description of the SAP Web Application Server platform in the High Availability environment, see the SAP documentation at http://service.sap.com/ha. In particular, study the section that provides an overview of the architecture of the SAP Web Application Server to be certain that you understand the basic concepts of your version of the SAP Web Application Server.
The architecture of the SAP Web Application Server components (such as SAP enqueue server and SAP message server) changed significantly with SAP Netweaver 04. Therefore, when running in the Oracle Solaris Cluster environment, these components must be configured differently from previous versions of the platform.
To eliminate potential single points of failure in an SAP Web Application Server platform, HA for SAP Web Application Server provides fault monitoring, automatic restart, and automatic failover for the components of the SAP Web Application Server platform.
The SAP web application server component of the platform can be configured either as a failover or as a scalable data service. The SAP J2EE engine component can also be configured either as failover or as scalable. The other components must be configured as failover data services.
For conceptual information about failover services and scalable services, see the Oracle Solaris Cluster Concepts Guide.
Each component of the SAP Web Application Server platform has a data service that protects the component in a Oracle Solaris Cluster configuration, as described in the following table.
Table 1-1 Protection of SAP Web Application Server Components by Oracle Solaris Cluster Data Services