Metadata snapshot method and device

Abstract

The invention provides a metadata snapshot method and device, and relates to the technical field of cloud computing, in particular to the technical field of cloud storage. According to the specific implementation scheme, in response to the arrival of the current snapshot moment, generating a second basic version number of the current snapshot moment based on a first basic version number of a binary tree at the previous snapshot moment searched in a database; in the process from the current snapshot moment to the next snapshot moment, updating the search binary tree based on the updated metadata when the metadata in the database is updated, and generating an updated version number for the search binary tree updated each time; and in response to the arrival of the next snapshot moment, performing snapshot operation on the search binary trees corresponding to all version numbers generated between the current snapshot moment and the next snapshot moment to generate snapshot information. According to the method and the device, a multi-version concurrency control mode is adopted, data of previous versions are not affected while the data are modified, the accuracy and consistency of the data are guaranteed, and snapshot data can be obtained quickly and efficiently.

Description

technical field [0001] The present disclosure relates to the technical field of cloud computing, in particular to the technical field of cloud storage, and in particular to a metadata snapshot method and a device thereof. Background technique [0002] In related technologies, when taking a snapshot of the database metadata management node, the method of storing the state data in memory, directly adding a read-write lock to copy the data, and generating a snapshot file for asynchronous data persistence is generally adopted. However, this solution When the amount of snapshot data is large, it is easy to cause memory blockage, and the time for memory copying data is prolonged. Contents of the invention [0003] The present disclosure provides a metadata snapshot method, device, device and storage medium. [0004] According to one aspect of the present disclosure, a metadata snapshot method is provided, by searching the database for the first basic version number of the binar...

AI Technical Summary

Problems solved by technology

[0002] In related technologies, when taking a snapshot of the database metadata management node, the method of storing the state data in memory, directly adding a read-write lock to copy the data, and generating a snapshot file for asynchronous data persistence is generally adopted. However, this solution When the amount of snapshot data is large, it is easy to cause memory blockage, and the memory copy data time is prolonged

Images