Compaq ProLiant Clusters HA/F100 Administrator's Manual page 42

2-8 Compaq ProLiant Clusters HA/F100 and HA/F200 Administrator Guide
Example 4: Database/Standby Server
An example business scenario describes a mail order business whose
competitive edge is quick product delivery (Figure 2-4). If the product is not
delivered on time, the order is void and the sale is terminated. The business
uses a single server to perform queries and calculations on order entry
information, translating sales orders into packaging and distribution
instructions for the warehouse. With an estimated downtime cost of
$1,000/hour, the company determines that the cost of a standby server is
justified.
This mission-critical (active) server is clustered with a standby server. If the
active server encounters a failure, this critical application and all its resources
fail over to the standby server, which validates the database and brings it
online. The standby server now becomes active and the application executes at
an acceptable level of performance.
Capacity
Mail Order System
(Mail Order System)
Shared Storage
Node1 Node2
(Standby)
(Mail Order Database)
Figure 2-4. Active/standby server example