Writable snapshot implementation method and device, equipment and readable storage medium

Abstract

The invention discloses a writable snapshot implementation method and device, equipment and a computer readable storage medium, and the method is applied to a distributed storage system and comprisesthe steps: receiving a writable snapshot obtaining instruction sent by a user; analyzing the writable snapshot acquisition instruction, and if the writable snapshot acquisition instruction is a writable snapshot creation instruction, creating a read-only snapshot as a target read-only snapshot; if the instruction is the read-only to writable instruction, obtaining a read-only snapshot from the distributed storage system and taking the read-only snapshot as a target read-only snapshot; creating a hidden volume invisible to the user according to the writable snapshot acquisition instruction; andperforming associated binding on the hidden volume and the target read-only snapshot to obtain a writable snapshot. According to the technical scheme disclosed by the invention, the read-only snapshot and the hidden volume invisible to the user are associated and bound to finally implement the read-write operation on the snapshot on the hidden volume, so that the writable snapshot has editable attributes, the application flexibility of snapshot data is improved, and the application scene of the snapshot data is conveniently expanded.

Description

technical field [0001] The present application relates to the field of storage technologies, and more specifically, to a method, device, device, and computer-readable storage medium for implementing a writable snapshot. Background technique [0002] SNIA (Storage Network Industry Association) defines a snapshot as: a fully available copy of a specified data set, which includes an image of the corresponding data at a certain point in time (the point in time when the copy starts). A snapshot can be either a copy or a replica of the data it represents. Since the snapshot technology can achieve data storage backup in a very short period of time, it is often used as a technology to enhance the data backup system, which can significantly shorten the RTO (Recovery Time Objective) and RPO (Restore Point Objective). two indicators. [0003] Currently, commonly used snapshots are read-only snapshots, that is, the snapshot data is a copy of the read-only snapshot attributes. Operatio...

AI Technical Summary

Problems solved by technology

[0003] Currently, commonly used snapshots are read-only snapshots, that is, the snapshot data is a copy of the read-only snapshot attributes. Operations such as adding, deleting, and modifying internal data can only be performed after the snapshot is rolled back, mapped, and mounted. Some read-only snapshots have the problem that it is not convenient to directly edit the created snapshot data, which will reduce the flexibility of snapshot data application and narrow the application scenarios of snapshot data

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