Gartner Research

High Availability

Published: 09 July 2012

ID: G00234442

Analyst(s): Richard Jones


As business operations' dependency on IT infrastructure continues to increase in response to the need for faster and leaner business processes, the need for these systems to be highly available also increases. Not only do high-availability designs focus on automatically detecting and reacting to failures, but, more importantly, they also focus on mitigating the downtime required for standard maintenance tasks. This Reference Architecture template outlines the approach and architecture to achieve high-availability of IT service infrastructure.

Table Of Contents

Template Applicability

Template Map

Template Diagram

Template Description

  • Data Center Networks
  • Network Switches
  • Server Cluster
    • Fan-out failover
    • N+1 Spare node failover
  • High-Availability Failover Software
    • Cluster Heartbeat
    • Quorum Manager
    • Cluster Resources
    • Resource Manager
    • Resource Monitors
  • Network Interface Cards
  • Power Supplies
  • Storage Adapters
  • Storage Switches
  • Storage Devices
  • Power Distribution Systems
  • Cooling Systems

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