A multinational enterprise is seeking to optimize its operational costs for an expansive, customer-facing application. Which cloud characteristic makes a public-cloud deployment the BEST choice for achieving this cost-optimization goal?
File synchronization
Metered utilization
Rapid elasticity
High availability
Metered utilization (also called measured service or pay-as-you-go) allows the provider to track CPU time, storage, bandwidth, and other resources and to bill the customer only for the amount actually consumed. This billing model lets a company run a large, variable workload without paying for idle capacity, making it the primary enabler of cost optimization in a public cloud.
Rapid elasticity certainly contributes to saving money by adding or removing instances as demand changes, but the savings are realized only because the de-provisioned resources stop accruing charges under the metered model. High availability focuses on uptime, and file synchronization keeps distributed data consistent; neither feature dictates how costs are calculated.
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