Application workloads are hard to predict. Auto-Tiering is a real-time intelligent mechanism that continuously positions data on the appropriate class of storage based on how frequently the data is accessed. The result is superior application performance and lower TCO across the entire storage architecture.
Tiered storage avoids the need to invest heavily in expensive Flash technology. Industry statistics show that, on average, only 15-20% of a company’s entire data footprint benefits from Flash storage since the remaining percentage is considered largely dormant.
According to Gartner, “The access patterns, value and usage characteristics of data stored within storage arrays varies widely, and is dependent on business cycles and organizational work processes. Because of this large variability, data stored within storage devices cannot be economically and efficiently stored on the same storage type, tier, format or media.”
L'auto-tiering sfrutta una combinazione di tecnologia Flash e dischi tradizionali, indipendentemente dal fatto che siano interni o basati su array, supportando fino a 15 differenti tier di storage. Per esempio:
|Tier||Caratteristiche||% DELLA PRODUZIONE TOTALE|
|1||Dischi ultra-veloci (flash)||15%|
|2||Dischi veloci (SAS 15k)||25%|
|3||Dischi a elevata capienza (SAS 7,2k NL)||60%|
|4||Dischi per test/sviluppo (SATA)||Secondo necessità|
|5||Dischi cloud per archiviazione||Secondo necessità|
As more advanced disk technologies become available, existing storage tiers can be modified as necessary and additional ones can be added to further diversify the tiered storage architecture.