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| Oracle Solaris Cluster Geographic Edition System Administration Guide Oracle Solaris Cluster 4.1

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## Overview of Oracle Solaris Cluster Administration Concepts

You must be an experienced Oracle Solaris Cluster administrator to administer Geographic Edition software.

This section describes the following Oracle Solaris Cluster administration topics that you need to understand before you administer the Geographic Edition software:

- Configuring Resources and Resource Groups

- Configuring Logical Hostnames

- Managing Device Groups

### Configuring Resources and Resource Groups

You use Oracle Solaris Cluster commands create failover and scalable resource groups.

For more information about administering resources and resource groups in Oracle Solaris Cluster software, see the Oracle Solaris Cluster Data Services Planning and Administration Guide.

### Configuring Logical Hostnames

The logical hostname is a special high-availability (HA) resource. The `geoadm start` command configures the logical hostname that corresponds to the cluster name. The IP address and host maps for the logical hostname must be set up before you run this command. Before assigning hostnames, familiarize yourself with the legal names and values that are described in Appendix B, Legal Names and Values of Geographic Edition Entities.

For more information about using the `geoadm start` command , see Enabling the Geographic Edition Software.

Note - If you are using the Availability Suite feature of Oracle Solaris for data replication, a logical hostname is created for each device group to be replicated. For more information, see Chapter 1, Replicating Data With the Availability Suite Feature of Oracle Solaris, in Oracle Solaris Cluster Geographic Edition Data Replication Guide for Oracle Solaris Availability Suite.

The following table lists the Oracle Solaris Cluster and Geographic Edition components that require IP addresses. Add these IP addresses to the following locations:

- All naming services that are being used

- The local `/etc/inet/hosts` file on each cluster node, after you install the Oracle Solaris OS software

Table 2-1 IP Addresses Required by Geographic Edition Software

Component | Number of IP Addresses Needed
--- | ---
Oracle Solaris Cluster administrative console | 1 per subnet
IP Network Multipathing groups | Single-adapter groups – 1 primary IP address. Multiple-adapter groups – 1 primary IP address plus 1 test IP address for each adapter in the group.
Cluster nodes | 1 per node, per subnet
Domain console network interface | 1 per domain
Console-access device | 1
Logical addresses | 1 per logical host resource, per subnet
Geographic Edition infrastructure hostname | 1 logical IP address per cluster infrastructure. For example, if you have two clusters in your Geographic Edition infrastructure, you need two IP addresses.
Replication with the Availability Suite feature of Oracle Solaris | 1 dedicated logical IP address on the local cluster for each device group to be replicated. For example, if you have two clusters in your Geographic Edition infrastructure, you need two IP addresses.

For more information about configuring the IP address and host maps during the installation of Oracle Solaris Cluster software, refer to Chapter 2, Installing Software on Global-Cluster Nodes, in Oracle Solaris Cluster Software Installation Guide.

### Managing Device Groups

A device group is a hardware resource that is managed by the Oracle Solaris Cluster software. A device group is a type of global device that is used by the Oracle Solaris Cluster software to register device resources, such as disks. A device group can include the device resources of disks and Solaris Volume Manager disk sets.

For information about configuring device groups in Oracle Solaris Cluster software, refer to Chapter 5, Administering Global Devices, Disk-Path Monitoring, and Cluster File Systems, in Oracle Solaris Cluster System Administration Guide.

The Geographic Edition software configures Oracle Solaris Cluster device groups to include replication.

For more information about configuring data replication in Geographic Edition software, see the documentation for the data replication product you use:

- Chapter 1, Replicating Data With the Availability Suite Feature of Oracle Solaris, in Oracle Solaris Cluster Geographic Edition Data Replication Guide for Oracle Solaris Availability Suite

- Chapter 1, Replicating Data With EMC Symmetrix Remote Data Facility Software, in Oracle Solaris Cluster Geographic Edition Data Replication Guide for EMC Symmetrix Remote Data Facility

- Chapter 1, Configuring and Administering Sun ZFS Storage Appliance Protection Groups, in Oracle Solaris Cluster Geographic Edition Remote Replication Guide for Sun ZFS Storage Appliance

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