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serverstackqns
Asked: 2019-10-16 22:27:20 +0800 CST

Understanding how AWS charges S3

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This is not a troubleshooting question, rather a more generic one. I have read about how AWS S3 is priced - in terms of storage used, data transfer, requests and other features used. And wrt storage used, I see that we're charged for per GB stored per month. For example; In NV region, S3 standard is priced as First 50 TB/Month - $0.023 per GB.

Now, my confusion is in this scenario. Let's say I am storing some data in S3 standard in a given month of 31 days in the following way:

Day 1: Uploading 10 GB data and keeping it for 10 days.
Day 10: Uploading another 15 GB data, making to a total of 25 GB, storing it for 7 days.
Day 17: Deleting 8 GB data, making to a total of 17 GB, keeping it for another 7 days.
Day 24: Deleted another 5 GB data and uploaded 10 GB, making to a total of 22 GB, keeping it for last 7 days.

In this use case, how would I be charged by AWS? A clear cut explanation would be great for my understanding, and would be really appreciated.

amazon-web-services

1 Answers

  1. Best Answer

    From the Billing section of the S3 FAQ:

    Storage Used:

    Amazon S3 storage pricing is summarized on the Amazon S3 Pricing page.

    The volume of storage billed in a month is based on the average storage used throughout the month. This includes all object data and metadata stored in buckets that you created under your AWS account. We measure your storage usage in “TimedStorage-ByteHrs,” which are added up at the end of the month to generate your monthly charges.

    Storage Example:

    Assume you store 100GB (107,374,182,400 bytes) of data in Amazon S3 Standard in your bucket for 15 days in March, and 100TB (109,951,162,777,600 bytes) of data in Amazon S3 Standard for the final 16 days in March.

    At the end of March, you would have the following usage in Byte-Hours: Total Byte-Hour usage = [107,374,182,400 bytes x 15 days x (24 hours / day)] + [109,951,162,777,600 bytes x 16 days x (24 hours / day)] = 42,259,901,212,262,400 Byte-Hours.

    Let's convert this to GB-Months: 42,259,901,212,262,400 Byte-Hours / 1,073,741,824 bytes per GB / 744 hours per month = 52,900 GB-Months

    This usage volume crosses two different volume tiers. The monthly storage price is calculated below assuming the data is stored in the US East (Northern Virginia) Region: 50 TB Tier: 51,200 GB x $0.023 = $1,177.60 50 TB to 450 TB Tier: 1,700 GB x $0.022 = $37.40

    Total Storage Fee = $1,177.60 + $37.40 = $1,215.00

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