on-demand computing

基本解释

On-demand computing instances with several OS options can be ran in a very short time like 5 minutes.
按照计算实例需求通过几个OS选项，便可以在很短的时间内例如5分钟就可以将应用运行起来。
Actually two new concepts are already beginning to be implemented: Grid computing and on-demand computing.
实际上，两种新的概念已经开始实现了：网格计算（Grid Computing）和按需计算（On-demand Computing）。
This, in turn, makes obvious the need for the concept of on-demand computing, which might be implemented on any configuration, from a simple cluster of servers to a network of 1024-node SP2s.
而这又明显地需要按需计算的概念（on-demand computing），按需计算可能是在任何配置下实现的，从简单的服务器集群到有1024个节点的 SP2 网络。

As more enterprises shut down their in-house data centers and turn to on-demand storage and computing services delivered via the Internet, their storage needs become more variable and less predictable.
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The company hopes to build demand by pitching them as cost-saving "print on demand" machines that work best when connected to HP computing hardware.
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Arguably more than any other government agencies, their missions require a fabric of utility computing that scales on demand and enables self discovery and self-service access to secure, timely and relevant information in support of mission: individual or shared.
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