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| Oracle Solaris Cluster Data Services Planning and Administration Guide Oracle Solaris Cluster 4.1

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Chapter 1

## Planning for Oracle Solaris Cluster Data Services

This chapter provides planning information and guidelines to install and configure Oracle Solaris Cluster data services. This chapter contains the following sections.

- Configuration Guidelines for Oracle Solaris Cluster Data Services

- Relationship Between Resource Groups and Device Groups

- Understanding `HAStoragePlus`

- Considerations for Installing and Configuring a Data Service

- Overview of the Installation and Configuration Process

- Tools for Data Service Resource Administration

- Standard Properties

- Node List Properties

- Legal RGM Names

For introductory information about data services, see Oracle Solaris Cluster Concepts Guide.

Oracle Solaris Cluster software can provide service only for those data services that are either supplied with the Oracle Solaris Cluster product or are created with the Oracle Solaris Cluster data services application programming interfaces (APIs).

If an Oracle Solaris Cluster data service is not provided for your application, consider developing a custom data service for the application. To develop a custom data service, use the Oracle Solaris Cluster data services APIs. For more information, see Oracle Solaris Cluster Data Services Developer’s Guide.

Note - Oracle Solaris Cluster does not provide a data service for the `sendmail`(1M) subsystem. The `sendmail` subsystem can run on the individual cluster nodes, but the `sendmail` functionality is not highly available. This restriction applies to all the `sendmail` functionality, including the functionality of mail delivery and mail routing, queuing, and retry.

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