Overview of MetroCluster/CA

MetroCluster is a set of scripts that work in an MC/ServiceGuard cluster to automate failover to alternate nodes in the case of disaster in a campus or metropolitan cluster. The MetroCluster/CA template contains the following files, installed in /opt/cmcluster/toolkit/SGCA:

Table 3-1 MetroCluster/CA Template Files

Name	Description
`sgcapkg.cntl`	The MetroCluster/CA control script template. This template must be customized for the specific Disk Array XP Series and HP 9000 host system configuration. Copies of this template must be customized for each separate MC/ServiceGuard package.
`Samples`	A directory containing sample convenience shell scripts that must be edited before using. These shell scripts may help to automate some configuration tasks. These scripts are contributed, and not supported. This directory also contains sample Raid Manager configuration files and other examples.

MetroCluster/CA has to be installed on all nodes that will run a ServiceGuard package whose data are on an HP SureStore E Disk Array XP Series where the data are replicated to a second XP using the Continuous Access XP facility. In the event of node failure, the integration of MetroCluster/CA with the package will allow the application to fail over in the following ways:

among local host systems attached to the same XP Series array
between one system that is attached locally to its XP and another "remote" host that is attached locally to the other XP

Configuration of MetroCluster/CA must be done on all the cluster nodes, as is done for any other MC/ServiceGuard package. To use MetroCluster/CA, Raid Manager XP host-based software for control and status of the XP Series boxes must also be installed and configured on each HP 9000 host system that might execute the application package.

Overview of MetroCluster/CA

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