Glacier¶

Amazon also calls them "storage classes" and they appear to function somewhat similarly.

https://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html

https://docs.aws.amazon.com/sdk-for-go/api/service/s3/

Can do PutObject directly to Glacier or you can use CopyObject to change the storage class of an existing object from "standard" to "glacier". (The docs are unclear but I guess you copy the object to itself?)

https://docs.aws.amazon.com/AmazonS3/latest/dev/storage-class-intro.html#sc-howtoset

Objects in Glacier do appear in index listing.

Returns a 403 error if you try GetObject on an archived object.

Use RestoreObject to make it available for GetObject on a temporary basis (you specify number of days in the request).

Unclear from documentation if you can use CopyObject to change the storage class back to "standard" after being restored.

https://docs.aws.amazon.com/AmazonS3/latest/dev/restoring-objects.html

Use S3 Batch operation to operate on many objects at once.