A data storage method and device

Abstract

The embodiment of the present invention discloses a data storage method and device, the method comprising: when receiving the update data of the target file, allocating the first storage space to store the update data of the target file, and recording the address of the first storage space, in When it is detected that there is no snapshot protection in the target file system, obtain the modification times of the root of the target file, and if the obtained modification times are less than the preset times threshold, record the address of the first storage space into the root of the target file. The data storage method of the embodiment of the invention can reduce the number of modifications to the memory when updating data, reduce the probability of fragmentation on the hard disk, avoid failure of the storage medium of the hard disk caused by too many revision times, and improve the service life of the hard disk.

Description

technical field [0001] The invention relates to the field of computer storage, in particular to a data storage method and device. Background technique [0002] Solid-state drives are more and more widely used in modern life, and the redirection write (English full name: Redirect On Write) technology of solid-state drives is also more and more applied to various file systems. Redirection write will not affect the data source. performance without affecting the performance of file system snapshot protection. [0003] The method of redirecting writing in the prior art will allocate a new data block for the updated data regardless of whether it is a modified write or a new write. No matter whether there is snapshot protection in the file system, a new data block must be allocated and the new data block address will be written into The root of the file, and then write the address of the root of the modified file into the root of the file system. The more modified data, the more n...

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Problems solved by technology

[0003] The method of redirecting writing in the prior art will allocate a new data block for the updated data regardless of whether it is a modified write or a new write. No matter whether there is snapshot protection in the file system, a new data block must be allocated and the new data block address will be written into The root of the file, and then write the address of the root of the modified file into the root of the file system. The more modified data, the more new data blocks are allocated, the greater the probability of fragmentation on the hard disk. In addition, frequently modify the file system The root of the hard disk will cause the failure of the hard disk storage medium, reduce the efficiency of file redirection and write, and reduce the service life of the hard disk

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