Disaster Recovery vs. High Availability

Disaster Recovery (DR) vs. High Availability (HA)

 

What are the main differences between DR and HA? It’s a question about which we have been frequently asked and there is a common misconception on that. The following table compares DR with HA in the various aspects.

 

#

DR

HA

Major Goal

Resiliency

Recovery

Main Focus

Decrease Downtime

Decrease Recovery Time

Implementation Destination

Same as primary location

Location other than primary location

Network

WAN

LAN

Position

Subset of
Business Continuity

Subset of DR

Risk Level

Whole System

Sub Systems

Major Root Cause

Human or natural disasters

Human or components’ issues

Run Time

On Events

Regularly

 

Please leave your comments and questions.