A virtual data cache management system and method for nand flash memory controller

Abstract

The invention relates to a virtual data cache management system and method of a NAND flash memory controller. The virtual data cache management method realizes high utilization rate of cache resources and system scalability through cache physical resource pooling and cache logic application virtualization. On the one hand, on the physical resource of the data cache, the present invention makes the cache application side not depend on the physical implementation of the cache through the uniform management after pooling. By eliminating the coupling between data cache logic applications and physical resources, the data cache management system can easily expand physical resources. On the other hand, in the logical application of the data cache, the present invention performs virtual management on the data cache, so as to achieve the sharing of physical resources between different data cache applications and improve the utilization rate of the data cache resources in the NAND flash memory storage system.

Description

technical field [0001] The invention relates to the field of data storage, in particular to a management system and method for data cache in a NAND flash memory controller. Background technique [0002] With the development of the Internet and electronic devices, the amount of data information has increased rapidly like a tide, and massive data access has put forward high requirements on the access speed of the storage system. NAND flash memory can provide high data access speed and is widely used in portable electronic device memory cards, solid-state drives, enterprise storage, cloud storage and other fields. [0003] The NAND flash controller includes, but is not limited to, a host interface control unit, a NAND flash media control unit, and a data cache control unit. In the NAND flash memory control system, there are data caches of different physical storage media, for example, a static random access memory (SRAM) inside the controller, and a dynamic random access memor...

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Problems solved by technology

On the other hand, the traditional data cache method uses a fixed physical cache configuration. Although the cache management method is simple, it is not conducive to the sharing of physical resources between various cache applications, resulting in low utilization of data cache resources, which in turn affects performance of NAND flash storage systems

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