Metadata save / restoration method, metadata chunk recovery method, and storage device

By dividing metadata into data streams and saving, restoring, and recycling them according to priority, the write amplification problem caused by metadata saving and restoring during fast startup is solved, resulting in faster metadata recovery and higher data block utilization.

CN115328701BActive Publication Date: 2026-07-24MEMBLAZE TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MEMBLAZE TECH BEIJING
Filing Date
2022-08-16
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In the fast boot process, existing technologies suffer from write amplification issues caused by the saving, recovery, and recycling of metadata, which affect the performance and lifespan of SSDs and increase metadata recovery time.

Method used

The metadata is divided into several metadata data streams, sorted according to the number and priority of update logs, and saved into a metadata block. During recovery, the data streams are read in sequence and patched using the update logs. During recycling, invalid data streams are marked to improve utilization.

Benefits of technology

It reduces the time for saving and restoring metadata in safe power-down scenarios, improves the utilization rate of large metadata blocks, reduces write amplification frequency, and improves the boot speed and data block utilization efficiency of SSDs.

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Abstract

The application relates to the field of storage devices, in particular to a metadata storage method, a metadata recovery method, a metadata large block recovery method and a storage device, which comprises the following steps: dividing metadata into a plurality of metadata data streams, taking the metadata data stream as a storage unit, and storing the metadata in a metadata large block. The application can solve the problems of quick recovery of a quick start technology and introduction of additional write amplification.
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