With an unlimited budget, you could provide nearly unlimited availability. However, real-world businesses are

limited by financial constraints. Assume, for the moment, that you are the manager of a data center, and you have a fixed budget to improve the availability of its systems. The budget will not allow you to heavily invest in all the components of a reliable system (servers, network connectivity, storage, system administration, documentation, training, testing, etc.). Therefore, you need to determine which upgrades would result in the largest gains in availability at the lowest cost.

Identify the single component in which you would invest most heavily, and explain why you think this upgrade would best improve the availability of the system. Additionally, explain why you chose to invest less heavily in any two other components.

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