Amazon is putting its EC2 cloud up for auction, to sell off its unused capacity.
Amazon Web Services (AWS) has announced the launch of a new paid-for model called Spot Instances, which enables prospective customers to bid for capacity in Amazon's cloud.
The Spot Price changes depending on supply and demand but as long as the customer's bid exceeds that price the space is theirs.
Peter De Santis, general manger of Amazon EC2, said in a statement: "As customers continued to expand their use of AWS, they started asking if additional pools of capacity were available, even if only for a few hours at a time."
"Some customers were looking to reduce costs in exchange for being flexible as to when they run their application; others told us they were willing to pay more when they had urgent, high volume needs."
He added: "Because of the dynamic nature of supply and demand in the Amazon EC2 environment, we developed Spot Instances to let customers take advantage of our unused capacity while specifying a price they are willing to pay."
The company claimed this new way of purchasing capacity and compute power is well suited to flexible start-stop applications such as data processing, web crawling and video rendering.
Spot Instances run the same software images and are the same sizes as both On-Demand and Reserved Instances. This means customers can move between the different purchasing options as and when they chose.
