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Chapter 12. Managing Tiering
The hot tier is the tiering volume created using better performing subvolumes, an example of which could be SSDs. Frequently accessed data is placed in the highest performance and most expensive hot tier. Hot tier volume could be a distributed volume or distributed-replicated volume.
The cold tier is the existing Red Hat Gluster Storage volume created using slower storage such as Spinning disks. Inactive or infrequently accessed data is placed in the lowest-cost cold tier.
Tiering automatically migrates files between hot tier and cold tier to improve the storage performance and resource use.
12.1. Tiering Architecture
Figure 12.1. Tiering Architecture