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High Availability Network Fundamentals by Chris Oggerino

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Predicting Availability Considering the Environment

In some networks, considering the environment's affect on downtime might be too much work. For example, if a power outage were a happy break time for a large percentage of the employees, then including environmental considerations in your availability calculations would be a waste of time. Power failures are not that common and can be ignored if everyone appreciates them as a good excuse to take a break.

For telephone and financial companies where downtime is measured in minutes and each minute can have significant financial or other cost, environmental considerations are crucial. If the power goes out in your house and you need to call 911, you probably do not care whether your telephone is ...

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