HA for SAP MaxDB Overview

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To eliminate single points of failure in an SAP MaxDB system, HA for SAP MaxDB provides the following features:

Fault monitoring and automatic failover for the SAP MaxDB application. You must configure HA for SAP MaxDB as a failover data service.
Fault monitoring and automatic restart for SAP xserver. You must configure SAP xserver as a multiple-master data service.

For conceptual information about failover data services and multiple-master data services, see the Concepts for Oracle Solaris Cluster 4.4.

Each component of SAP MaxDB has a data service that protects the component when the component is configured with Oracle Solaris Cluster. See the following table.

Note - The files that are associated with the SUNW.sap_xserver resource type are supplied with the Oracle Solaris Cluster HA for SAP liveCache data service. The Oracle Solaris Cluster HA for SAP liveCache data service is also installed when you install the HA for SAP MaxDB data service.

Table 1 Protection of SAP MaxDB Components by Oracle Solaris Cluster Data Services

SAP MaxDB Component	Data Service
SAP MaxDB	HA for SAP MaxDB The resource type is `SUNW.sapdb`.
SAP xserver	Oracle Solaris Cluster HA for SAP liveCache The resource type is `SUNW.sap_xserver`.
NFS file system	Oracle Solaris Cluster HA for NFS The resource type is `SUNW.nfs`. For more information about this data service, see Oracle Solaris Cluster Data Service for NFS Guide.