From the perspective of storage features, the performance of SSDs are high, but the cost is also high per GB. Relatively speaking, the cost of a traditional hard drive is low, so as performance is relatively poor. If we follow the 80/20 rule to configure storage systems, all-SSD configurations are unreasonable for all but the most intensive applications. On the other hand, the data itself has a lifecycle. As the age of the data increases, it is accessed less often. Therefore, to balance performance and cost factors, adapting a hybrid storage architecture with a mixture of SSDs and traditional HDDs seem to be the most reasonable approach for modern IT environments. An automated tiering pool is a simple and elegant solution for dynamically matching storage requirements with changes in the frequency of data access.