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I think one of the most interesting parts of this is how they plan to ensure that people do not use it for transient backup: https://aws.amazon.com/glacier/faqs/#How_am_I_charged_for_de...

Deleting data from Amazon Glacier is free if the archive being deleted has been stored for three months or longer. If an archive is deleted within three months of being uploaded, you will be charged an early deletion fee. In the US East (Northern Virginia) Region, you would be charged a prorated early deletion fee of $0.03 per gigabyte deleted within three months.



Nice catch, that's an important piece of fine print.


So I guess that means it would still work well for a scheme like time machine uses, where incremental changes are added but deletions are simply made note of. At least I think that's how it works.


And yet they support a max of 100 vaults per account, so some roll behind recompaction of incrementals is still necessary.




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