Metadata reconstruction method, apparatus, and computer-readable storage medium

Abstract

The embodiment of the invention discloses a Metadata reconstruction method, apparatus, and computer-readable storage medium. Each type of metadata has at least one corresponding data block, and the metadata is brushed down to the corresponding data block. Recording the corresponding type identification for the metadata completing the power-down operation, and storing the type identification corresponding to the type identification and the metadata type not performing the power-down operation into the preset storage space; Judging whether the type identification stored in the preset storage space covers all the type identification corresponding to the power-down operation after the system is powered on; If not, the target data blocks corresponding to the type identification not covered arescanned, and the metadata in each target data block is restored to its corresponding storage location. The required metadata can be obtained only by scanning the data blocks corresponding to the missing type identifier during power-up, which saves the scanning time of metadata recovery and improves the efficiency of metadata reconstruction.

Description

technical field [0001] The present invention relates to the technical field of storage systems, in particular to a metadata reconstruction method, device and computer-readable storage medium. Background technique [0002] A solid state drive (Solid State Drives, SSD) is a fast storage device, and its internal data mainly includes user data and management data. Data that manages user data is called management data, also called metadata. There are many kinds of management data, such as SSD configuration information, L2P table, etc. Whether these data are correct or not will directly affect the normal operation of SSD or the correctness of operating data processing. [0003] In practical applications, it is generally simple to save the metadata when powering off and restore it when powering on. When metadata recovery errors occur, the traditional method is to scan all metadata blocks, determine whether they are metadata blocks that need to be reconstructed according to the re...

AI Technical Summary

Problems solved by technology

However, this process needs to scan all metadata blocks, and it often takes a long time to complete the reconstruction of metadata, resulting in low efficiency of metadata reconstruction

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