Amazon EC2允许拥有信用卡的任何人按小时支付服务器费用，通过一个应用程序编程接口(API)来打开和关闭服务器。
Amazon EC2 lets anyone with a credit card pay for servers by the hour, turning them on and off through an application programming interface (API).
集群中的每个节点有一个定制的netmon . cf文件，其中列出一些IP地址，为了判断一个接口是打开的还是关闭的，它必须能够ping通这些地址。
Each node in the cluster has a custom netmon.cf file that lists all the IP addresses it must be able to ping for it to mark an interface up or down.
Facebook Connect本来牵了一个好头，但难过的是他们很快又关闭了请求Facebook中朋友加入第三方的接口。
Facebook Connect was a good first attempt at this, but sadly they quickly closed down their API that allowed you to invite your Facebook Friends to join third-party services.
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