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How does pricing with AWS works.

By exemple: 1024 Go of Data Transfer Out in their calculator (http://calculator.s3.amazonaws.com/index.html) cost about 120$.

If you remove this 1024Go and move it in "Total Data Processed by all ELBs", it cost way less, about 30$.

Basically, my question is : Does you pay for transfer being sent from your EC2 to the visitor connected to the ELB? Which price is right?

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  • Only Amazon can answer this question, and they should do so. – Falcon Momot Nov 25 '14 at 2:27
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Both are correct and in your example your pricing will actually be $150.

Traffic passed inside AWS regions is free if you use private IP's or DNS Names, except to the ELB.

The ELB will process that $30 worth of data, but then it still must go out to the internet and your users, which will be another $120.

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  • This is not a correct answer. You pay also for traffic between AZs within the same region (unless it's traffic from/to Amazon S3, Amazon Glacier, Amazon DynamoDB, Amazon SES, Amazon SQS, or Amazon SimpleDB). See aws.amazon.com/ec2/pricing for more details. – mgsk Aug 6 '16 at 20:35

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