A file system snapshot method and snapshot device

Abstract

The present application discloses a file system snapshot method, including: obtaining an operation instruction corresponding to a first file system, the first file system is used to store the first file data; when the operation instruction is used to indicate not to modify the first file data in the data, determine that the snapshot operation is not performed on the first file data; It is used to perform a first rewrite operation on the first file data; if yes, determine to perform a snapshot operation on the first file data. The embodiment of the present application also provides a corresponding snapshot device. The technical solution of the present application can obtain the operation instructions in the file system, and determine whether to perform snapshot operations on the file data according to the function of the operation instructions, which can reduce unnecessary snapshot operations and solve the problem that redundant snapshot operations affect the business performance of the file system and the snapshot space problem of utilization.

Description

technical field [0001] The present application relates to the technical field of data protection, in particular to a file system snapshot method and a snapshot device. Background technique [0002] With the rapid development of society, in the context of today's big data, cloud computing and artificial intelligence, the amount of data that needs to be stored is also growing exponentially, which also poses new requirements and challenges for data backup protection. Snapshots have played an important role as an important means of data protection in this field. [0003] At present, snapshot technologies including copy-on-write, redirection-on-write, incremental snapshots, and continuous data protection have developed relatively maturely. However, most snapshots are currently implemented on the block device layer, and few for network Application of snapshot technology for network attached storage (NAS) business and file system. In the block device layer snapshot technology, wh...

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Problems solved by technology

[0003] At present, snapshot technologies including copy-on-write, redirection-on-write, incremental snapshots, and continuous data protection have developed relatively maturely. However, most snapshots are currently implemented on the block device layer, and few for network Application of snapshot technology for network attached storage (NAS) business and file system

In the block device layer snapshot technology, when a new file is written, the block device layer cannot distinguish whether there is file data before the current storage location, and will make a snapshot copy of many original useless data. Due to the file system business, writing new files These unnecessary snapshot operations will result in redundant snapshot data, seriously affecting the performance of file system services and the utilization of snapshot space.

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