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SmartPools enables a multi-tier architecture to be created using high-performance nodes with SSD for performance tiers and high-capacity SATA-only nodes for the high-capacity archive tier. For example, a file pool policy could move files from the performance tier to a more cost-effective capacity-biased tier after the wanted period of inactivity.
For more information about OneFS data tiering and file pool policies, see the SmartPools white paper.