Utility Storage is a service model in which a provider makes storage capacity available to an individual, an organization or a business unit on a pay-per-use basis. The utility model of utility storage is sometimes called metered services or storage on demand.
As in the utility computing model, the purpose of utility storage is to use resources efficiently and reduce costs. A use-based pay structure can be much more cost-effective for an enterprise than it would be for them to purchase, manage and maintain an infrastructure that meets peak requirements, which may be far beyond what’s needed normally.
There are three basic models of utility storage: