What Does Auto-Tiering Mean?

Auto-tiering is a storage method that involves directing different types of data to separate storage components in a connected or networked storage system.


Auto-tiering is also known as automated tiered storage, automated storage tiering and automatic storage tiering.

Techopedia Explains Auto-Tiering

In complex systems, there may be a need to differentiate or triage different kinds of data for storage optimization. In these kinds of situations, auto-tiering can be an effective way of creating categories of storage for data.

Auto-tiering solutions can be applied to a logical unit number (LUN) or other kinds of file systems. IT experts sometimes talk about "sub LUN" as a specific type of auto-tiering.

As a specific kind of software-defined storage, auto-tiering is often useful for systems including solid-state drives and other types of storage networks that have different storage types. In many cases, auto-tiering provides for "hot" or frequently used data to be kept in certain more accessible drives or drives with certain properties, whereas "cold" data is kept in other kinds of drives for longer-term storage.


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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.