Working with AMIs and controlling cluster termination

In the previous section, we explained how EMR by default uses the Amazon Linux AMI for EMR and you have the option to create a custom AMI and use it while creating a cluster.

Now, in this section, we will dive deep into the default Amazon Linux AMI for EMR, custom AMI implementations, and how cluster termination works that you can configure as per your use case.

Working with AMIs

An AMI includes all the resources required to launch an EC2 instance. While launching an instance, you can specify the AMI it should be using. You can use the same AMI to launch multiple EC2 instances. If your EC2 instances need different configurations, then you can create instance-specific AMIs.

An AMI has the following components:

• One or more Elastic Block Store (EBS) snapshots, or if the AMI is backed by an instance store, a template for the EC2 instance's root volume. This might include an operating system, applications...