Veeam Backup for AWS compresses all backed-up data when saving it to object storage. The compression rate depends on the type and structure of source data and usually varies from 50% to 60%. This means that the compressed data typically consumes 50% less storage space than the source data.
Average size of backed-up data
40%–50% of source data
Depending on whether you choose to keep backed-up data in short-term or long-term storage, Veeam Backup for AWS saves different objects to S3 buckets.
S3 Storage Type
1 MB (compressed to ~512 KB)
S3 Glacier and S3 Glacier Deep Archive
4 KB (per 1 GB of source data)
Amazon S3 Bucket Limits
You can send 3,500 PUT/COPY/POST/DELETE and 5,500 GET/HEAD requests per second per prefix in an Amazon S3 bucket. Veeam Backup for AWS has built-in mechanisms to assure you do not exceed the recommended maximums. While you could use 1 bucket to store all your data, it is recommended to use multiple buckets and S3 Glacier for cost-effective long-term archiving. For more information on Amazon S3 pricing, see AWS Documentation.
It is also recommended to use dedicated IAM roles for backup repositories, as described in section Repository IAM Permissions.
Veeam Backup for AWS comes with a built-in cost calculator that allows you to estimate your AWS expenses. It uses publicly available AWS price lists, so it may not reflect your exact cost in case of custom pricing or an enterprise agreement. Full details can be found at the cost estimation step of the Add Policy wizard.