Glossary
Glossary
Amazon Machine Image
(AMI)
An Amazon Machine Image (AMI) is an encrypted machine image
stored in Amazon S3. It contains all the information necessary to
boot instances of your software.
Instance Once an AMI has been launched, the resulting running system is
referred to as an instance. All instances based on the same AMI start
out identical and any information on them is lost when the instances
are terminated or fail.
Group A set of customer instances that have been designated by the
customer as being related by assigning them the same security group
when the instances were first run. The Amazon EC2 firewall
controls access to instances based on the instance's group
membership and the rules defined for the group.
Reservation A collection if instances started as part of the same launch request.
Amazon EC2
Developer Guide
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