Intelligent data storage management method and device

Abstract

The invention provides an intelligent data storage management method and device. The intelligent data storage management device comprises an IO write request classification unit, an IO random write update statistics unit, a cold and hot data identification unit and an execution unit. The method comprises: dividing the input IO write request into an IO sequential write and an IO random write; the IO is written into an execution unit in sequence to execute an IO write operation; IO random write-in cache queues, statistics of update times of each IO random write-in in two time periods is carriedout, and the update times are divided into four classes which are recorded as hot data, cold data and cold and hot undetermined data; and when the cache space occupied by the random write queue reaches the threshold water level line of the allocated cache capacity, triggering an operation of moving out a part of queues in the cache and writing the queues into a storage medium. According to the method, the cold and hot data identification success rate can be improved, it is ensured that data written into the flash memory medium physical block have the same or similar updating frequency, the write amplification effect in the flash memory medium garbage collection process is reduced, and the service life of the flash memory medium is prolonged.

Description

Technical field [0001] The invention belongs to the field of data solid-state storage, relates to cold and hot intelligent identification and management of data IO write requests, and specifically relates to a data intelligent storage management method and device. Background technique [0002] A solid state drive (SSD) consists of a storage controller and storage media, such as figure 1 Shown. The working mechanism of the solid-state storage medium, which characterizes the 0 / 1 medium state transition is one-way, which determines that it cannot update data at the original address by overwriting, but must write another free physical page. At the same time, the mapping table from the logical address to the physical address is updated, and the old data contained in the original physical page is marked as invalid. [0003] The operating system accesses the storage controller of the solid-state storage through the logical address block (LBA), the unit is 512B / 1KB / 4KB or larger. The sto...

AI Technical Summary

Problems solved by technology

This method will lead to misjudgment of hot and cold data at least in logical reasoning, the least recent use does not mean that its activity is low, and the small amount of cold data leads to different update frequencies for data written to the same physical block, etc.

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