EC2 Instance Types

[Ben Frueh]

Our current Canvas development environment runs on a Amazon EC2 is a single high-CPU medium instance.

What is the best strategy as the system grows to hundreds of synchronous users and thousands of asynchronous users? Possibilities I've considered:

1. single c1.medium --> two c1.medium app servers + c1.medium MySQL
2. single c1.medium --> two c1.medium app servers + Amazon RDS
   
3. single c1.medium --> single m1.large --> two m1.large app servers + m1.large MySQL
   
4. single c1.medium --> single m1.large --> two m1.large app servers + Amazon RDS
   

Is my next step to scale up or out? Is RDS worth investigating?

[David B]

Did you ever end up scaling? It would be great if you could share your experience if you did.