Cache reading method and device for distributed storage and computer readable storage medium

Abstract

The invention discloses a cache reading method and device for distributed storage and a computer readable storage medium. The method comprises the steps that after a current reading request is acquired, current reading offset of a file corresponding to the current reading request is extracted and recorded; if the file corresponding to the current reading request is identical to a file corresponding to a last reading request, whether the current reading offset is within a threshold range corresponding to last reading offset is judged; and if yes, pre-reading is initiated. According to the method, by judging whether the current reading offset is within the threshold range corresponding to the last reading offset, judgment conditions for triggering pre-reading are expanded, normal pre-readingcan be performed in case of an incompletely sequential reading scene, the stability of front-end reading performance is enhanced, and user experience is improved.

Description

technical field [0001] The present invention relates to the field of distributed storage applications, in particular to a distributed storage read cache method, device and computer-readable storage medium. Background technique [0002] With the development of science and technology in modern society, distributed storage systems that store data in multiple independent devices based on the network have been widely used. In a distributed storage system, in order to improve the read and write performance of the front-end client, the concept of cache is introduced in the system design, and an area in the memory is divided to accommodate the issued read and write request data, especially for read operations. The data pre-read from the back-end storage can improve the cache hit rate and greatly improve the read performance. [0003] In the existing technology, the traditional read cache mechanism in the distributed storage system is only designed for general situations. If the rea...

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Problems solved by technology

[0003] In the existing technology, the traditional read cache mechanism in the distributed storage system is only designed for general situations. If the read files are not read in complete order, the pre-read will fail, affecting the front-end read performance and not conducive to user experience.

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