Reliability vs. Availability

There is a difference between reliability and availability. Depending on a customer's situation, system requirements may favor reliability over availability (or vice versa). For example, reliability will have a higher priority in cases where a system is placed in a remote area where maintenance could be expensive. For additional information, refer to Chapter 3, “Sun Cluster 2.2 Components” to assess the reliability of different hardware component choices for your datacenter needs.

Although availability is a function of reliability and serviceability, it is possible for a system with poor reliability to achieve high availability. For example, assume a system averages four failures a year, and with each failure, the ...

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