3 Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access for P9000 and XP

The HP StorageWorks P9000 Disk Array family or HP StorageWorks XP Disk Array series allows you to configure data replication solutions to provide disaster tolerance for Serviceguard clusters over long distances. This chapter describes the Continuous Access P9000 and XP software and the additional files that integrate the P9000 or XP Disk Arrays with Metrocluster. It then shows how to configure both metropolitan and Continentalclusters solutions using Continuous Access P9000 or XP.

The topics discussed in this chapter are:

•Files for Integrating P9000 or XP Disk Arrays with Serviceguard Clusters

•Overview of Continuous Access P9000 and XP Concepts

•Creating the Cluster

•Preparing the Cluster for Data Replication

•Configuring Legacy Packages for Disaster Recovery

•Configuring Modular Packages

•Support for Easy Deployment Feature

•Adding a Node to a Metrocluster

•Completing and Running a Metrocluster Solution with Continuous Access P9000 or XP

•Completing and Running a Continentalclusters Solution with Continuous Access P9000 or XP

Metrocluster also defines a Site Aware Disaster Tolerant Architecture for complex workloads such as Oracle RAC database, including Oracle 10gR2 RAC, Oracle 11gR1 RAC, Oracle 11gR2 RAC, and SAP. This solution uses an additional software feature called the Site Controller Package to provide disaster tolerance for workload databases. For more information on the site aware disaster tolerant architecture, see “Overview of Site Aware Disaster Tolerant Architecture” (page 337).

Files for Integrating P9000 or XP Disk Arrays with Serviceguard Clusters

Metrocluster is a set of executable programs and an environmental file that work in a Serviceguard cluster to automate failover to alternate nodes in the case of disaster in metropolitan cluster. The Metrocluster with Continuous Access for P9000 and XP product contains the following files.

Table 16 Metrocluster with Continuous Access for P9000 and XP

Name

Description

/opt/cmcluster/toolkit/SGCA/xpca.env The Metrocluster with Continuous Access for P9000 and XP environmental file. This file must be customized for the specific P9000 or XP Disk Array Series, and HP host system configuration. Copies of this file must be customized for each separate Serviceguard package.

/usr/sbin/DRCheckDiskStatus

The executable module that checks for a specific environment

 

file in the package directory and should not be edited.

 

 

/usr/sbin/DRCheckXPCADevGrp

The program that checks the status of the P9000 or XP

 

Continuous Access device group that is used by the

 

package.

 

 

/usr/sbin/DRMonitorXPCADevGrp

The program that monitors the status of the P9000 or XP

 

Continuous Access package device group, sends notification,

 

and performs pre-defined actions on the device group.

Files for Integrating P9000 or XP Disk Arrays with Serviceguard Clusters 153