Storage Tiering is a mechanism that automatically or manually places data on different storage classes based on activity or importance.
Simple definition
Storage Tiering is a mechanism that automatically or manually places data on different storage classes based on activity or importance. It belongs to the Storage vocabulary and is useful when reading architecture diagrams, product documentation, logs, or administration procedures.
What is it used for?
Its main purpose is to reserve fast media for hot data and move cold data to lower-cost storage. The practical value depends on the surrounding architecture, security model, and operational requirements.
How does it work?
Policies or access statistics classify blocks/objects and move them among SSD, HDD, cloud, or archive tiers according to defined thresholds.
Key points
- Scope: A mechanism that automatically or manually places data on different storage classes based on activity or importance.
- Operational goal: Reserve fast media for hot data and move cold data to lower-cost storage.
- Implementation: Policies or access statistics classify blocks/objects and move them among SSD, HDD, cloud, or archive tiers according to defined thresholds.
Points to watch
Document topology and dependencies before changes; a pool, tiering, or multipath mistake can cause access loss or severe degradation.
In short
Storage Tiering = a mechanism that automatically or manually places data on different storage classes based on activity or importance. Use it when you need to reserve fast media for hot data and move cold data to lower-cost storage.