Gartner Research

High Availability: A Perspective

Published: 24 November 2004

ID: G0090193

Analyst(s): Ann Katan, Jane Wright


High-availability technologies combined with resource management software and capacity-on-demand services provide a way to maximize application uptime and meet performance goals.

Table Of Contents
  • Technology Basics
    • The Need for High Availability
    • What Is Availability?
    • High Availability
    • Availability Percentages Aren't the Whole Story
    • Causes of Downtime
    • High Availability vs. Fault Tolerance
    • Reducing Complexity to Increase Availability
    • Virtualization to Increase Availability
  • Technology Analysis
    • Reducing Downtime Due to Hardware
    • Reducing Downtime Due to Software
    • Reducing Outages Caused by Environmental Stresses, Failures and Disasters
    • Business Use
    • Price vs. Performance
    • Selection Guidelines
  • Technology Leaders
    • Recommended Gartner Research
  • Insight

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