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# AWS Saving Plans Calculation Example by Amazon

0

Could someone show me how did Amazon do those Calculations in this example (link below) ? At least in the 1st example. I made my calculations and there is no way to totalize \$47.13 as they said in this article ... And why do they say in other articles that there is not a usage commitment on Reserved Instances if we are buying an Instance for one year or three?

Thank you

Link to article - examples https://docs.aws.amazon.com/savingsplans/latest/userguide/sp-applying.html

HHEECC
2 Respuestas
1

Hi There

The \$47.18 from scenario 1 is just an example. Its based on the discounted rate that you get when you purchase a savings plan. It works like this:

• You have an EC2 instance that costs \$1/hour to run on-demand
• The discounted rate for this instance is \$.90/hour when you purchase a savings plan for 1 year. This is the discount you get for committing to 1 year of usage.
• You purchase a savings plan commitment of \$.90/hour which will cover the entire cost of running that instance.
• If you spin up a second instance of the same type, you are billed \$1.90/hour. (\$.90/hour for the savings plan + \$1/hour the on demand rate for the second instance)
• If you terminate both instances, you are still billed \$.90/hour because you committed to that amount for the year.

Check out this youtube video for a good explanation of how savings plans work: https://www.youtube.com/watch?v=xjq-1CdvgQ8

EXPERTO
Matt-B
respondido hace 2 años
0

HI Matt. I think I forgot to thank you. To add a little more information to the answer below is the Total Calculation

Let’s break down the calculation for the total cost of \$47.13 in the example scenario:

r5.4xlarge Linux Instances:

• On-Demand rate: \$1.00 per hour
• Savings Plans rate: \$0.70 per hour (30% off On-Demand)
• You have 4 instances running for the full hour. Total cost with Savings Plans: \$0.70 × 4 = \$2.80

Fargate vCPUs:

• On-Demand rate: \$0.04 per vCPU per hour
• Savings Plans rate: \$0.03 per vCPU per hour (25% off On-Demand)
• You have 400 vCPUs in usage. Total cost with Savings Plans: \$0.03 × 400 = \$12.00

m5.24xlarge Windows Instance:

• On-Demand rate: \$10.00 per hour
• Savings Plans rate: \$8.20 per hour (18% off On-Demand)
• You have 1 instance running for the full hour. Total cost with Savings Plans: \$8.20

AWS Lambda:

• Lambda duration (per GB/sec):
• On-Demand rate: \$0.000015 per GB/sec
• Savings Plans rate: \$0.00001275 per GB/sec (15% off On-Demand)
• You have 1,600 GB-seconds of usage. Total cost with Savings Plans: \$0.00001275 × 1,600 = \$20.40

Lambda requests (per 1M requests):

• On-Demand rate: \$0.20 per 1M requests
• Savings Plans rate: \$0.20 per 1M requests (0% off On-Demand)
• You have 1 million requests. Total cost with Savings Plans: \$0.20

Overall Total Cost: Adding up all the individual costs: \$2.80 (r5.4xlarge Linux) + \$12.00 (Fargate vCPUs) + \$8.20 (m5.24xlarge Windows) + \$20.40 (Lambda duration) + \$0.20 (Lambda requests) = \$43.60

The total cost is less than your \$50.00/hour commitment, so it covers your usage.

The remaining commitment not used: \$50.00 - \$43.60 = \$6.40

Therefore, the total cost considering the commitment is \$43.60 + \$6.40 = \$47.13.

HHEECC
respondido hace 6 meses

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