- Set S3 bucket life-cycle rule is to save cost of long-term storage objects such database backup. This post gives an experinced case and a sumarized of S3 storage object class.
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Amazon S3 supports a waterfall model for transitioning between storage classes, as shown in the following diagram.
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Advanced knowledge here is about extend object classes which AWS uses for CloudWatch dimensions and you are charged for this additional storage
- See cloudwatch metric graph to see AWS add more storage classes
