Planning the HA for SAP MaxDB Installation and Configuration

This section contains the information that you need to plan your HA for SAP MaxDB installation and configuration.

Configuration Requirements

The configuration requirements in this section apply only to HA for SAP MaxDB.

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Caution - If your data service configuration does not conform to these requirements, the data service configuration might not be supported.

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For requirements that apply to all data services, see Configuration Guidelines for Oracle Solaris Cluster Data Services in Oracle Solaris Cluster Data Services Planning and Administration Guide.

SAP MaxDB Software Version Requirements

Use SAP MaxDB versions 7.8.2.26, 7.9.7.10, or compatible versions.

HA for SAP MaxDB Configuration Requirements

Configure HA for SAP MaxDB as a failover data service. You cannot configure HA for SAP MaxDB either as a scalable data service or as a multiple master data service. For more information, see the following sections:

• How to Enable SAP MaxDB to Run in a Cluster

• How to Register and Configure a SAP MaxDB Resource

SAP xserver Configuration Requirements

To enable client applications to access HA for SAP MaxDB, you must use SAP xserver. Configure SAP xserver as a multiple master data service. Do not configure SAP xserver as a failover data service.

Configure SAP xserver so that SAP xserver starts on all nodes to which the SAP MaxDB resource can fail over. To implement this configuration, ensure that the node list of the SAP xserver resource group contains all nodes that are in the node list of the SAP MaxDB resource group. For more information, see How to Register and Configure an SAP xserver Resource.

Supported Configurations of This Data Service

The HA for SAP MaxDB data service supports configurations that conform to the requirements in Configuration Requirements.

If you plan to use SAP MaxDB with other highly available SAP MaxDB applications, you must also configure the Oracle Solaris Cluster data services for those applications. For more information, see the following table.

The examples that follow show these supported configurations of HA for SAP MaxDB:

• Two-node cluster configuration

• Four-node cluster configuration with SAP R/3

• Four-node cluster configuration with SAP R/3 and SAP liveCache

Example 1-1 Two-Node Configuration

This example shows a two-node configuration in which a client application accesses the SAP MaxDB resource through the SAP xserver resource. The characteristics of this configuration are as follows:

• The SAP MaxDB resource is configured as a failover data service.

• The SAP xserver resource is configured as a multiple master data service.

Example 1-2 Four-Node Configuration With SAP R/3

This example shows a four-node configuration in which SAP MaxDB is used with SAP R/3. This configuration uses multiple Advanced Planner & Optimizer (APO) application servers. The characteristics of this configuration are as follows:

• The SAP MaxDB APO Central Instance (CI) resource is configured as a failover data service.

• The SAP MaxDB resource is configured as a failover data service.

• The SAP xserver resource is configured as a multiple master data service.

• APO application server (APP) resources are configured as scalable data services.

Example 1-3 Four-Node Configuration With SAP R/3 and SAP liveCache

This example shows a four-node configuration in which SAP MaxDB is used with SAP R/3 and SAP liveCache. This configuration uses multiple APO application servers. The characteristics of this configuration are as follows:

• The SAP MaxDB APO CI resource is configured as a failover data service.

• The SAP MaxDB resource is configured as a failover data service.

• The SAP xserver resource is configured as a multiple master data service.

• APP resources are configured as scalable data services.

• The SAP liveCache resource is configured as a failover data service.

Configuration Considerations

The configuration considerations in the subsections that follow affect the installation and configuration of HA for SAP MaxDB.

Device Group for the SAP MaxDB Application

Ensure that you create a device group for the SAP MaxDB application as follows:

• Install SAP MaxDB on its own global device group. For more information, see Installing and Configuring SAP MaxDB. This separate global device group for SAP MaxDB ensures that the SAP MaxDB resource can depend on the HAStoragePlus resource only for SAP MaxDB.

• Create an HAStoragePlus resource for the global device group on which SAP MaxDB is installed. For more information, see Configuring the HAStoragePlus Resource Type to Work With HA for SAP MaxDB.

• Ensure that the resource for SAP MaxDB depends on the HAStoragePlus resource for the global device group on which SAP MaxDB is installed. For more information, see Registering and Configuring HA for SAP MaxDB.

Dependencies of the SAP MaxDB Application on SAP xserver

Configure SAP MaxDB so that SAP MaxDB starts only on a node where SAP xserver is running. To implement this configuration, configure resources and resource groups as follows:

• Ensure that the resource for SAP MaxDB depends on the resource for SAP xserver.

• Create on the SAP MaxDB resource group a strong positive affinity for the SAP xserver resource group.

For more information, see Registering and Configuring HA for SAP MaxDB.

Administration of SAP xserver by a User Other Than Root

You might be required to administer SAP xserver as a user other than root. In this situation, you must create and define that user as follows:

• You must create that user on all cluster nodes or zones that master SAP xserver.

• You must define that user when you register and configure HA for SAP MaxDB. For more information, see Registering and Configuring HA for SAP MaxDB.

Configuration Planning Questions

Answer the questions in this section to plan the installation and configuration of HA for SAP MaxDB.

• Which resource group will you use for the SAP MaxDB application resource and for the logical host name for the SAP MaxDB resource?

  Use the answer to this question when you perform the procedure How to Enable SAP MaxDB to Run in a Cluster.

• What is the logical host name for the SAP MaxDB resource? Clients access the data service through this logical host name.

  Use the answer to this question when you perform the following procedures:

  • How to Install and Configure SAP MaxDB

  • How to Enable SAP MaxDB to Run in a Cluster

• Where will the system configuration files reside?

  See Oracle Solaris Cluster Data Services Planning and Administration Guide for the advantages and disadvantages of using the local file system instead of the cluster file system.