tieredtallennus

Tiered storage, or tieredtallennus in Finnish, is a data storage strategy that categorizes data based on its access frequency and importance, and then assigns it to different types of storage media. This approach aims to optimize storage costs and performance by matching data characteristics to the most appropriate and cost-effective storage tier.

Typically, tiered storage systems include multiple levels. The highest tier, often comprised of fast solid-state drives (SSDs), is used for frequently accessed, critical data that requires immediate retrieval. This tier offers the highest performance but also the highest cost per gigabyte. The middle tier might utilize less expensive hard disk drives (HDDs) for data that is accessed less frequently but still needs relatively quick access. The lowest tier is usually reserved for archival data or backups, employing the most cost-effective storage solutions like tape drives or cloud archive services. This data is accessed infrequently and can tolerate longer retrieval times.

The movement of data between these tiers is often automated through policies defined by administrators. These policies consider factors such as the age of the data, its access patterns, and business requirements. By automatically migrating inactive data to lower tiers and potentially recalling active data to higher tiers, organizations can reduce overall storage expenses while ensuring that performance-sensitive data remains readily available. This strategy is crucial for managing large volumes of data efficiently and cost-effectively across various industries.