Flash memory and method and system for automatically separating cold and hot data based on same

Abstract

The invention is applied to the technical field of flash memory storage, and provides a flash memory and a method and a system for automatically separating cold and hot data based on the same. The method comprises the steps that a hot degree identifier for showing the access frequency of data is added for each record in a logic physical address mapping table of the flash memory; and when the flash memory processes data, the hot degree identifiers in the logic physical address mapping table are updated according to the preset hot levels, and different hot levels correspond to different hot degree identifiers. According to the flash memory and the method and the system for automatically separating cold and hot data based on the same, the cold and hot degrees of data are processed directly in the logic physical address mapping table of the flash memory, and just modifying an FTL (Flash Translation Layer) algorithm can separate cold and hot data without using additional software and cache. Therefore, the flash memory and the method and the system for automatically separating cold and hot data can automatically realize the separation and storage according to the access frequency during the storage of data in the flash memory instead of using additional cold and hot data judgment algorithm and cache.

Description

technical field [0001] The invention relates to the technical field of flash memory storage, in particular to a flash memory-based automatic separation method for hot and cold data, a system and a flash memory. Background technique [0002] In existing computer or storage systems, data is often classified according to access frequency to distinguish cold data from hot data so that users can process the data. Hot data: requires instant access in high-performance, highly available, and high-demand environments. Warm data: In a near-line or online backup environment, users need to access these data quickly, but the access frequency is low. Cold data: Data that needs to be archived and stored for a long time. [0003] At present, the separation of hot and cold data in a computer or storage system requires running software created through a certain algorithm model on the host computer, and at the same time, temporarily storing the data in the memory (cache), and detecting the d...

AI Technical Summary

Problems solved by technology

[0004] 1. Data needs to be temporarily stored in memory (cache), which increases the risk of data loss when the system suddenly loses power

[0005] 2. It is necessary to run hot and cold data judgment software on the host computer, which increases the burden on the host CPU

[0006] 3. Existing methods are created through algorithms and data models, and the accuracy of the models affects the final data separation effect

[0007] In summary, the existing cold and hot data separation methods obviously have inconvenience and defects in actual use, so it is necessary to improve them

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