Overview of Sun StorEdge Availability Suite 3.2.1 Data Replication

This section provides an overview of Sun StorEdge Availability Suite 3.2.1 resource groups and outlines some limitations of Sun StorEdge Availability Suite 3.2.1 replication on clusters of more than two nodes.

Sun StorEdge Availability Suite 3.2.1 Lightweight Resource Groups

A device group that is controlled by Sun StorEdge Availability Suite 3.2.1 might be added to a protection group. Sun Cluster Geographic Edition software then creates a lightweight resource group for each device group. The name of the lightweight resource group has the following format:

AVS-device-group-name-stor-rg

For example, a device group named avsdg that is controlled by the Sun StorEdge Availability Suite 3.2.1 software has a lightweight resource group named avsdg-stor-rg.

The lightweight resource group collocates the logical host and the device group, a requirement of data replication with the Sun StorEdge Availability Suite 3.2.1 remote mirror software.

Each lightweight resource group contains two resources:

• A logical hostname resource for the local logical host that is used for replication of the device group. The name of this resource is the same as the hostname of the local logical host.

• A HAStoragePlus resource for controlling the collocation of the device group with the lightweight resource group. The name of this resource has the format AVS-device-group-name-stor.

For more information about lightweight resource groups, see the Sun StorEdge Availability Suite 3.2.1 documentation.

Sun StorEdge Availability Suite 3.2.1 Replication Resource Groups

In addition to the light weight resource group, when a device group controlled by the Sun StorEdge Availability Suite 3.2.1 software is added to a protection group, Sun Cluster Geographic Edition software creates a special replication resource for that device group in the replication resource group. By monitoring these replication resource groups, the overall status of replication can be monitored. One replication resource group with one replication resource is created for each protection group.

The name of the replication resource group has the following format:

AVS-protection-group-name-rep-rg

The replication resource in the replication resource group monitors the replication status of the device group on the local cluster, which is reported by the Sun StorEdge Availability Suite 3.2.1 remote mirror software.

The name of the replication resource has the following format:

AVS-device-group-name-rep-rs