High Availability

Archived Published: 09 July 2012 ID: G00234442


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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
  • Recommended Reading
  • Notes
© 2012 Gartner, Inc. and/or its Affiliates. All Rights Reserved. Reproduction and distribution of this publication in any form without prior written permission is forbidden. The information contained herein has been obtained from sources believed to be reliable. Gartner disclaims all warranties as to the accuracy, completeness or adequacy of such information. Although Gartners research may discuss legal issues related to the information technology business, Gartner does not provide legal advice or services and its research should not be construed or used as such. Gartner shall have no liability for errors, omissions or inadequacies in the information contained herein or for interpretations thereof. The opinions expressed herein are subject to change without notice.

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