Is EFS Provisioned Throughput mode billed at daily granularity?

Question

According to AWS documentation,

`You can decrease your file system throughput in Provisioned Throughput mode as long as it’s been more than 24 hours since the last decrease. Additionally, you can change between Provisioned Throughput mode and the default Bursting Throughput mode as long as it’s been more than 24 hours since the last throughput mode change.`

Does it also mean that if I enable Provisioned Throughput and then, switch back to Bursting Throughput mode after 24 hrs, the charges for the Provisioned Throughput are only for that 1 day or worst case 2 days? 
Has anyone had experience doing this?

Thank you in advance.

Answer

With EFS, throughput is billed per month, and it's based on the average throughput provisioned in excess of what your EFS Standard storage allows for the month. Your throughput is measured in "MB/s-Month," which are added up at the end of the month to generate your monthly charges.

Note that AWS billing works hourly. This means that if you enable provisioned throughput only for a certain number of hours, you will be charged that pro-rated amount only for the hours / days you used it for.

Take a look at more information on the EFS pricing page: https://aws.amazon.com/efs/pricing/ and in particular, check the Example 3 at the bottom of the page where you can find other pricing examples.

Is EFS Provisioned Throughput mode billed at daily granularity?

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