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Disaster Tolerance and Recovery in a Serviceguard Cluster
Evaluating the Need for Disaster Tolerance
Chapter 1 15
line inoperable as well as the computers. In this case disaster
recovery would be moot, and local failover is probably the more
appropriate level of protection.
On the other hand, you may have an order processing center that is
prone to floods in the winter. The business loses thousands of dollars
a minute while the order processing servers are down. A disaster
tolerant architecture is appropriate protection in this situation.
Deciding to implement a disaster recovery solution really depends on the
balance between risk of disaster, and the vulnerability of your business if
a disaster occurs. The following pages give a high-level view of a variety
of disaster tolerant solutions and sketch the general guidelines that you
must follow in developing a disaster tolerant computing environment.