EC2 Pricing Flashcards
What are the 4 pricing models for EC2?
On-Demand, Spot, Reserved Instances (RI), Dedicated
What are the features for On-Demand EC2 pricing?
1) It is low cost and flexible
2) Only pay per hour
Usecase: short-term, unpredictable work loads, first time apps
Ideal when your workloads cant be interrupted
What are the features for Reserved Instances EC2 pricing?
You get upto 75% off (Best long term value)
Use case: Steady state or predictable usage
1) You can resell unused reserved instances via RI marketplace
How is reserved instances EC2 pricing for reduced pricing determined?
It is based on Term * Class Offering * Payment Option
Term is 1 or 3 years
Payment Options are All upfront, Partial Upfront, No Upfront
What are the class offerings in reserved instances reduced pricing for EC2?
Standard: Up to 75% off compared to on-demand pricing. Cannot change RI attributes
Convertible: Up to 54% off compared to on-demand. Allows you to change RI attributes if greater of equal in value.
Scheduled: You reserve instances for a specific time period e.g. once a week for a few hours. Savings can vary.
What are the features for EC2 spot pricing?
Up to 90% off compared to On-Demand.
You can request for spare computing capacity.
Flexible start and end times.
Can handle interruptions (server randomly stopping and starting)
Good for non-critical jobs
Instances can be terminated by AWS at anytime
If instance is terminated you don’t get charged for partial hour usage only for any hour it ran
What are the features for EC2 dedicated hosting pricing?
Most expensive, dedicated servers, Can be on-demand or reserved (up to 70% off).
Use case for this is when you need a guarantee of isolated hardware.
