HSM: The Original Tiering Engine Behind Mainframes, Cloud, and S3

This story was originally published on HackerNoon at: https://hackernoon.com/hsm-the-original-tiering-engine-behind-mainframes-cloud-and-s3. From mainframe DFSMShsm to cloud storage classes: a practical history of HSM, ILM, tiering, recall, and the products that shaped modern archives. Check more stories related to data-science at: https://hackernoon.com/c/data-science. You can also check exclusive content about #data-tiering, #hsm-vs-ilm, #hierarchical-storage-mgmt, #data-lifecycle-management, #tiered-data-storage, #object-storage, #object-storage-lifecycle, #hackernoon-top-story, and more. This story was written by: @carlwatts. Learn more about this writer by checking @carlwatts's about page, and for more stories, please visit hackernoon.com. Hierarchical Storage Management (HSM) is the storage world’s oldest magic trick. It makes expensive storage look bigger by quietly moving data to cheaper tiers. HSM has five moving parts: a primary tier, secondary tiers, a policy engine, a recall mechanism, and a migration engine.