Multitier Storage Systems
Tiered storage systems
A Multitier Storage System is a storage system which is composed of multiple types (tiers) of storage devices and/or subsystems, each having distinct characteristics from other tiers. Typical technologies used for an individual storage tier are flash memory, magnetic disks, and tapes. A Multitier Storage System is usually designed to meet system requirements that any single tier would not be able to meet alone. To ease the administration, a Multitier Storage System often has the capability of automatically and dynamically moving data across tiers in accordance with the requirements. Another term Tiered Storage System is also utilized to refer to a Multitier Storage System.
Individual storage technologies have unique characteristics. Combining different technologies to build a storage system is a natural solution in order to satisfy a design goal that any single technology cannot meet by itself. This idea can be seen as a conceptual...