1. Auto-scaling Services on Amazon EC2

2. Auto-scaling of Services (1/2) Write the service, deploy it on the cloud, and it simply scales Simply store the state in the proper places No specific code or API to make a service scale on EC2 Auto-scaling of Java, JavaScript, and services written in other scripting languages

3. Auto-scaling of Services (2/2) Scale up or scale down based on load  Scale up when load increases  Scale down when load decreases Minimize the number of idling instances thereby optimizing cost  State can be replicated between the instances Preconfigured off-the-shelf AMIs  Can be a paid AMI  Specific configuration can be read from S3

4. Deploying a Service on the Cloud AMI Instances Queue: Can use SQS

5. Deploying a Service on the Cloud

7. Service is available now

8. Scaling

9. Load Increases

10. Scaling Startup new instances

11. Scaling New instances join group

12. Scaling Load Decreases

13. Scaling Terminate instances