What is Amazon compute unit?

Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides resizable compute capacity in the cloud. It is designed to make web-scale computing easier for developers. read more

In simple terms, Amazon EC2 Compute Unit determines the speed of the processor. The more the value the higher you have the cpu power. The screen shot below shows the value of CPU speed in one of our virtual machines created with KVM Virtualization software. The official amazon documents talks little bit more about ec2 compute unit here. read more

Amazon EC2 uses a variety of measures to provide each instance with a consistent and predictable amount of CPU capacity. In order to make it easy for developers to compare CPU capacity between different instance types, we have defined an Amazon EC2 Compute Unit. read more

Amazon EC2 Spot instances are spare compute capacity in the AWS cloud available at up to 90% discount compared to On-Demand prices. As a trade-off, AWS offers no SLA on these instances and customers take the risk that it can be interrupted with only two minutes of notification when Amazon needs the capacity back. read more