Method, device, computer equipment and storage medium for dynamic loading of mapping table

Abstract

The invention discloses a method, device, computer equipment and storage medium for dynamically loading a mapping table, wherein the method includes the following steps: receiving a write request from a host; querying a corresponding mapping table according to the write request; initiating a mapping table loading request; Initiate a host write operation through the new physical address allocated for the host’s newly written data; read data from the mapping table area stored in NAND; write the host’s newly written data to the allocated new physical address; through the loaded mapping table Update the entry value of the data newly written by the host; update the mapping table by storing the new physical address of the data newly written by the host, and mark the old physical address as garbage data. The present invention greatly improves the writing performance in the scenario of triggering the dynamic loading of the mapping table. In addition, the consistency of the mapping table is guaranteed through the post-update strategy of the mapping table, and subsequent read requests can find the accurate new write location.

Description

technical field [0001] The invention relates to a solid-state hard disk, more specifically, a method, device, computer equipment and storage medium for dynamic loading of a mapping table in the internal writing process of the solid-state hard disk. Background technique [0002] When the existing SSD (Solid State Drive) writes, it generally updates the logic-to-physical mapping table after assigning the physical address of the NAND, and then initiates the NAND write operation. However, in SSDs with limited memory, since the mapping table is not all stored in memory, a dynamic loading scenario will be triggered. At this time, since the old mapping table is still on the NAND, it is necessary to buffer the host write request first and load the mapping first. table, and then update the mapping table, and finally initiate the host write NAND operation. [0003] In the internal processing flow when triggering the dynamic loading of the mapping table in the prior art, since the wri...

AI Technical Summary

Problems solved by technology

[0003] In the internal processing flow when triggering the dynamic loading of the mapping table in the prior art, since the write request needs to wait for the loading of the mapping table to be completed, the write request needs to be cached in the mapping table management module for a long time, thereby greatly reducing the write time of the SSD. performance

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