With Amazon EFS, you pay only for the resources that you use. There is no minimum fee and there are no set-up charges.
Amazon EFS offers two storage classes: the Standard storage class, and the Infrequent Access storage class (EFS IA). EFS IA provides price/performance that's cost-optimized for files not accessed every day. To load data into EFS IA, simply enable Lifecycle Management for your file system and reduce your storage costs by up to 92%.
Industry research and customer analysis shows that on average, 20% of files are actively used and 80% are infrequently accessed. Using that estimate, you can store your files on Amazon EFS at an effective price of $0.08/GB-month*. See below for detailed pricing examples.
Amazon EFS Standard Storage Class
The Standard storage class is designed for active file system workloads and you pay only for the amount of file system storage you use per month.
Amazon EFS Infrequent Access Storage Class
The Infrequent Access storage class is cost-optimized for files accessed less frequently. Data stored on the Infrequent Access storage class costs less than Standard and you will pay a fee each time you read from or write to a file.
Amazon EFS Bursting Throughput (Default)
In the default Bursting Throughput mode, there are no charges for bandwidth or requests and you get a baseline rate of 50 KB/s per GB of throughput included with the price of EFS Standard storage.
Amazon EFS Provisioned Throughput
You can optionally select the Provisioned Throughput mode and provision the throughput of your file system independent of the amount of data stored and pay separately for storage and throughput. Like the default Bursting Throughput mode, the Provisioned Throughput mode also includes 50 KB/s per GB (or 1 MB/s per 20 GB) of throughput in the price of EFS Standard storage. You are billed only for the throughput provisioned above what you are provided based on data you have stored.
Within your first 12 months on AWS, you can use up to 5 GB/month on the EFS Standard storage class for free.
The storage amount billed in a month is based on the average storage space used throughout the month. Your storage usage is measured in "GB-Month," which are added up at the end of the month to generate your monthly charges. These pricing examples assume 20% of your data is stored in the EFS Standard storage class and 80% is stored in the EFS IA storage class, following industry-accepted estimates.
The throughput amount billed in a month is 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.
Assume your file system is located in the US East (N. Virginia) region, uses 100 GB of EFS Standard storage, and uses 400 GB of EFS Infrequent Access storage for the entirety of a 31 day month. At the end of the month, you would have the following usage in GB-Hours:
We add up GB-Hours and convert to GB-Month to calculate monthly charges:
Total Monthly Storage Charge: $30.00 + $10.00 = $40.00 or $.08/GB-month
This example compares two scenarios in which the customer stores 100 GB on EFS Standard and 400 GB on EFS IA in the US East (N. Virginia) region.
In the first scenario, the customer selects the default Bursting Throughput mode and in the second scenario, the customer configures 10 MB/s of Provisioned Throughput.
Note that the customer is entitled to a baseline throughput of 5 MB/s in both scenarios because she is storing 100 GB of data on Amazon EFS Standard.
Default Bursting Throughput: 100 GB of data in EFS Standard and 400 GB of data in EFS IA, using the default Bursting Throughput mode
Total monthly storage charge (as above): $40.00
Provisioned Throughput: 100 GB of data in EFS Standard and 400 GB of data in EFS IA, with 10 MB/s of Provisioned Throughput
Total monthly storage charge (see above calculations): $40.00
Default throughput (MB/s-Hours) = (74,400 GB-Hours / 20 GB-Hours) * 1 MB/s-Hour = 3,720 MB/s-Hours
Total provisioned throughput (MB/s-Hours) = 10 MB/s x 31 x 24 hours/day = 7,440 MB/s-Hours
Total billable provisioned throughput (MB/s-Hours) = 7,440 MB/s-Hours – 3,720 MB/s-Hours = 3,720 MB/s-Hours
Total billable provisioned throughput (MB/s-Month) = 3,720 MB/s-Hours / (31 days/month x 24 hours/day) = 5 MB/s-Month
Total monthly Provisioned Throughput charge = 5 MB/s-Month x 6.00 = $30.00
Total monthly charge = Total monthly storage charge + Total monthly throughput charge = $40.00 + $30.00 = $70.00
The following example reflects a scenario where your file access patterns change over time, and includes each of EFS IA's pricing dimensions.
Assume your file system is located in the US East (N. Virginia) region. At the beginning of a 31 day month, your file system stores 1 TB of files on EFS Standard. On the 15th day of the month, EFS Lifecycle Management moves 80% of your files to the EFS Infrequent Access storage class after 14 days of having not been accessed. Once your infrequently accessed files move to EFS IA, you read them all in full once per month.
First, we calculate the pro-rated storage usage:
Next, we convert the storage usage into GB-months and calculate the storage charge:
Next, we calculate the access charges for files in Amazon EFS Infrequent Access:
Finally, we calculate the total EFS charge for the month:
Total monthly charge = Total storage charge + Total access charge = $179.36 + $16 = $195.36
Moving your Amazon EFS file data can be managed simply with AWS DataSync.
To simplify and accelerate data transfers in and out of Amazon EFS, you can use AWS DataSync, a managed online data transfer service. DataSync’s usage-based pricing is simple and predictable. You pay only for data transferred, at a flat, per-gigabyte rate—no software licenses, contracts, maintenance fees, development cycles or required hardware.
Backing up your Amazon EFS file data can be managed simply with AWS Backup.
To back up your Amazon EFS file data you can use AWS Backup, a fully managed backup service that makes it easy to centralize and automate the back up of data across AWS services. AWS Backup provides you with a single place to monitor backup activity and to find and restore backups when needed. With AWS Backup, you pay only for the amount of backup storage you use and the amount of backup data you restore in the month. There is no minimum fee and there are no set-up charges.
Amazon EFS offers price advantages over self-managed cloud alternatives. For more information on how much can be saved, see the Amazon EFS Total Cost of Ownership (TCO) example here.