VVCR’s clusters operate on AWS On-Demand Instances. You are charged for the number of seconds instances run for. There is a 60-second minimum before you start being charged.
AWS limits the number of running On-Demand Instances per account and region. The limit is determined by the number of Virtual Central Processing Units (vCPUs) that the active instance is using.
For example, a t3.medium instance uses 2 vCPU credits and a g4dn.4xlarge instance requires 16 vCPU credits.
Each of the 8 instance type families has its own limit:
- On-Demand Standard (A, C, D, H, I, M, R, T, Z) instances
- On-Demand DL instances
- On-Demand F instances
- On-Demand G and VT instances
- On-Demand High Memory instances
- On-Demand Inf instances
- On-Demand P instances
- On-Demand X instances
You can launch any combination of instance types as long as the number of vCPUs does not exceed your account limit. AWS provides a vCPU limits calculator to determine the number of vCPUs you may need. You can request a limit increase at any time, and EC2 automatically raises your limit based on your usage.
You can find your current limits on the Limits page in the Amazon EC2 console.
You may get this error when trying to create a Production Instance if you don’t have enough vCPU’s. Just click on the link below to request an increase.
Click here for more information on EC2 vCPU Limits:
Click here to learn how to request an EC2 vCPU Limit Increase: