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I am trying to calculate the number of API calls that would be made for transferring to Glacier. Documentation says that objects are 32MB in size, are the objects uploaded in one 32MB Put or is MPU used at the default 8MB?

There is a section that discusses this in the cloud architecture guide for AWS:

https://documentation.commvault.com/2023e/expert/files/pdf/AWSCloudArchitectureGuide_2023e_Edition.pdf

Check out page 288 (also before and after). It should be a 32MB size. There is a API calculation just below that page as well for S3-IA. In general, the API requests are a trivial part of the overall storage cost. Amazon typically puts that there to prevent abuse or poor API implementations.


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