The pricing model for Amazon’s S3 storage is like a math problem with too many variables. There is storage used, bandwidth used, puts and gets and surely more that get poured into the simmering pot that is your S3 billing charge. This post will be the first in a series of short posts explaining how the different components are charged for by Amazon.
In simple terms Amazon averages out the storage you have in use, on a daily basis and charges you for the storage used at the end of the month. The cleverly call this average “TimedStorage-ByteHrs”.
Here’s an example from their website:
Assume you store 100GB (107,374,182,400 bytes) of standard Amazon S3 storage data in your bucket for 15 days in March, and 100TB (109,951,162,777,600 bytes) of standard Amazon S3 storage data 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 x (1 GB / 1,073,741,824 bytes) x (1 month / 744 hours) = 52,900 GB-Months
This usage volume crosses three different volume tiers. The monthly storage price is calculated below assuming the data is stored in the US Standard Region:
1 TB Tier: 1024GB x $0.140 = $143.36
1 TB to 50 TB Tier: 50,176 GB (49×1024) x $0.125 = $6,272.00
50 TB to 450 TB Tier: 1,700 GB (remainder) x $0.110 = $187.00
Total Storage Fee = $143.36 + $6,272.00 + $187.00 = $6,602.36
GOOD GRIEF – Who writes this stuff for them?
Here’s another way of looking at it:
They take measurements of your storage used throughout the month, and charge you based on Actual storage used. The charges begin at 14 cents per GB and drop from there based on volume.
Here’s a simple example – you have 6 GB of data and that data remains constant throughout the month. You’ll be charged 6 x .14 or .84 (84 cents) for the storage portion of your bill.
If you keep your storage under 5 GB there is no charge for the storage during your accounts first year.