Fig 4

(Right) To launch an EC2 instance, you need to pick an operating system (standard Amazon Linux will provide flexibility for new users) and technical parameters, such as CPU power and memory (RAM). Standard unit of computing power is virtual CPU, vCPU. There is no linear relationship between physical processors and vCPU, but one virtual CPU unit corresponds to a single thread. Correctly selecting the number of vCPUs for your code might require experimenting. Some instances come with graphical processing units (GPU), other instances provide access to fast solid-state drive storage. (Right) Second part of launching an instance is selecting access rules. It includes setting up private-public key pair for passwordless login, and allowing firewall rules for SSH traffic (terminal) and potentially also traffic on ports associated with Jupyter notebook server (such as 8000 port).