SSD: What are the differences between caching and tiering?
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The terms tiering and caching are often used interchangeably, but actually refer to two different storage acceleration techniques. Both techniques involve placing frequently accessed -- hot -- data onto a high-speed medium such as flash, but the similarities between the two mostly end there.
This expert e-guide takes a closer look at SSD caching, how caching and tiering are alike, and some caching and tiering challenges.