Data writing method and device, storage server and computer readable storage medium

Abstract

The invention discloses a data writing method and device, a storage server and a computer readable storage medium, and the method comprises the steps: writing writing data corresponding to a writing request into a writing buffer region when the writing request is received; acquiring historical access data of a data block corresponding to the to-be-brushed data when a data brushing operation of thewrite buffer is triggered; judging whether the to-be-brushed data is write-only data or not based on the historical access data; if yes, writing the to-be-brushed data into a hard disk drive; and ifnot, writing the to-be-brushed data into a cache. According to the data writing method provided by the invention, useless flow written into the cache can be effectively reduced, more space is reservedfor common data in the cache, and the utilization rate of the cache space is improved, so that the reading hit rate of the cache is improved, the reading performance of a storage system is improved,the lowest writing flow of the cache is realized, and the efficiency of a writing strategy is improved.

Description

technical field [0001] The present application relates to the field of storage technology, and more specifically, to a data writing method and device, a storage server, and a computer-readable storage medium. Background technique [0002] When the client generates a write request, the storage server decides whether to load the data to be written into the cache and when to flush the dirty data in the cache to the back-end hard drive according to the write policy. Therefore, write policies have a large impact on system performance, data consistency, and write traffic to cache media. [0003] In the related art, there are three basic writing strategies: write-through strategy (write-through), write-back strategy (write-back) and write-around strategy (write-around). The write-through strategy is to write the data to be written to the cache and the back-end hard disk drive at the same time. The incoming data is directly written to the back-end hard drive, and the miss data is ...

AI Technical Summary

Problems solved by technology

[0004] Under the ever-changing and diverse cloud workloads, a fixed write strategy is doomed to be inefficient

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