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HP-UX System Administrator's Guide: Routine Management Tasks: HP-UX 11i Version 3 > Appendix A Using High Availability Strategies

Other High Availability Products and Features

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Dynamic Root Disk

Dynamic Root Disk is an HP-UX system administration tool set used to clone an HP-UX system image to a disk other than that from which the system is currently booted, for puroses of software maintenance and recovery. In this way, you can install software and patches to a clone of your current system without affecting the running system. Then, when an opportunity to reboot the system is available, the patched or updated clone can be booted. This reduces system downtime to just the time it takes to reboot to the clone. Also, if necessary, the changes can be quickly backed out by simply rebooting to the original clone.

High Availability Monitors

High availability monitors allow you to check up on your system’s resources and to be informed if problems develop. They can be used in conjunction with Serviceguard. Monitors are available for disk resources, cluster resources, network interfaces, system resources, and database resources. When a monitor detects a problem, an alert is sent, allowing an operator or administrator to correct the problem.

HP Reference

Using High Availability Monitors

Enterprise Cluster Master Toolkit

The Enterprise Cluster Master Toolkit is a set of templates and scripts that allow you to configure ServiceGuard packages for the HP Domain Internet servers as well as for several third-party database management systems. The master toolkit is a collection of specific product toolkits, which include the following:

  • HA Foundation Monitor toolkit, designed to monitor the status of an entire mission critical environment.

  • HA Internet toolkits for use with HP Domain server products.

  • Database toolkits for Oracle, Informix, Sybase, and Progress database management systems.

HP Reference

Enterprise Cluster Master Toolkit Version B.01.03 Release Notes for HP-UX 11i

MetroCluster

MetroCluster is a Hewlett-Packard high availability product for Serviceguard customers requiring integrated disaster recovery solutions. MetroCluster provides automated failover of ServiceGuard packages on local and remote high availability disk arrays. Integrating MetroCluster with Serviceguard allows application packages to fail over:

  • Between one system that is attached locally to an array frame and another remote node that is attached locally to another array frame.

  • Among local nodes that are attached to the same array.

Two versions of MetroCluster are available:

  • MetroCluster with Continuous Access XP provides a special package-control script template to implement physical replication between HP SureStore XP256 or XP512 disk arrays.

  • MetroCluster with EMC SRDF provides a special package-control script template to implement physical replication between EMC Symmetrix disk arrays.

HP Reference

Designing Disaster Tolerant High Availability Clusters

Continental Clusters

Continental Clusters is a Hewlett-Packard high availability solution that provides disaster tolerant clustering over long distances. Continental Clusters employs semi-automatic failover of Serviceguard packages from a primary cluster to a recovery cluster following a cluster event that indicates serious disruption of service on the primary cluster.

The product consists of a set of configuration tools, a monitor that sends notification of cluster-down events, and a command that moves packages from one cluster to another. In addition, Continental Clusters includes the following components:

  • Cluster Object Manager, which provides the ability to query ServiceGuard cluster status.

  • A special package control script template to implement physical data replication between HP SureStore XP256 or HP512 disk arrays.

  • A special package control script template to implement physical data replication between EMC Symmetrix disk arrays.

HP Reference

Designing Disaster Tolerant High Availability Clusters

HP ServiceControl

HP ServiceControl is a system management environment including high capacity HP HyperPlex clusters. It provides a consolidated point for managing your workload, applications, and resources on your system from a single management station. High availability products, such as Serviceguard and HA Monitors, reside physically on the HyperPlex cluster nodes.

HP ServiceControl organizes nodes into HyperPlex clusters. Within these clusters, Serviceguard minimizes and eliminates application downtime by

  • Protecting mission-critical applications from a variety of hardware and software failures by monitoring the health of each node.

  • Balancing the workload on a system by responding quickly to changes and workload demands.

HP Reference

HP-UX ServiceControl User’s Guide

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