Overview of Sun Cluster Administration Concepts

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

This section describes some specific Sun Cluster administration topics that you need to understand before you administer Sun Cluster Geographic Edition software.

Configuring Resources and Resource Groups

You use either the scrgadm command or the SunPlex Manager to create failover and scalable resource groups.

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

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 described in Appendix B, Legal Names and Values of Sun Cluster Geographic Edition Entities.

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

Note –

If you are using Sun StorEdge^TM Availability Suite 3.2 for data replication, one logical hostname is created for each device group to be replicated. For more information, see Chapter 6, Replicating Data With Sun StorEdge Availability Suite 3.2.1 Software.

The following table lists the Sun Cluster and Sun Cluster Geographic Edition components that need to be assigned 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 Solaris software

Table 2–1 IP Addresses Required by Sun Cluster Geographic Edition Software


Component	Number of IP Addresses Needed
Sun Cluster administrative console	1 per subnet
IP Network Multipathing groups	Single-adapter groups – 1 primary IP address. For the Solaris 8 release, also 1 test IP address for each adapter in the group. 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 (Sun Fire^TM 15000)	1 per domain
Console-access device	1
Logical addresses	1 per logical host resource, per subnet
Sun Cluster Geographic Edition infrastructure hostname	1 logical IP address per cluster infrastructure For example, if you have two clusters in your Sun Cluster Geographic Edition infrastructure, you need two IP addresses.
Replication with Sun StorEdge Availability Suite 3.2.1 software	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 Sun Cluster Geographic Edition infrastructure, you need two IP addresses.

For more information about configuring the IP address and host maps during the installation of Sun Cluster software, refer to Chapter 2, Installing and Configuring Sun Cluster Software, in Sun Cluster Software Installation Guide for Solaris OS.

Managing Device Groups

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

For information about configuring device groups in Sun Cluster software, refer to Chapter 4, Administering Global Devices, Disk-Path Monitoring, and Cluster File Systems, in Sun Cluster System Administration Guide for Solaris OS.

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

For more information about configuring data replication in Sun Cluster Geographic Edition software, see Chapter 6, Replicating Data With Sun StorEdge Availability Suite 3.2.1 Software and Chapter 9, Replicating Data With Hitachi TrueCopy Software.