A data writing method, device, equipment and computer-readable storage medium

Abstract

The present application discloses a data writing method, device, device, and computer-readable storage medium. The method includes: receiving write data, and judging whether the length of the write data is greater than a preset length; if not, determining that the write data is lowercase data, And generate corresponding metadata according to the lowercase data; if so, determine that the write data is uppercase data, and generate corresponding metadata according to the uppercase data; write the lowercase data, the metadata corresponding to the lowercase data, and the metadata corresponding to the uppercase data into the SCM array, and write the uppercase data into the SSD array. In the above-mentioned technical solution disclosed in the present application, data with a relatively large data length is written into the SSD array, and data with a relatively small data length is written into the SCM array, so as to alleviate the write amplification problem existing in the SSD in the SSD array , thereby improving the performance of the SSD and reducing the impact on the life of the SSD.

Description

technical field [0001] The present application relates to the technical field of data storage, and more particularly, to a data writing method, apparatus, device, and computer-readable storage medium. Background technique [0002] With the capacity expansion and cost reduction of flash-based SSDs (Solid state drives), SSDs with high performance and low energy consumption are more and more widely used in storage systems. use. [0003] In SSD, the basic unit of reading and writing is page (page), and the basic unit of erasing (or garbage collection) is block (block), and a block is usually composed of an integer number of pages. When a page is updated or the data in the page is invalid and new data needs to be written, the entire block where the page is located needs to be read and erased, and then the data is written to the page, which causes SSD In addition, since a large amount of data migration will be caused during garbage collection under write-intensive conditions, th...

AI Technical Summary

Problems solved by technology

[0003] In SSD, the basic unit of reading and writing is page, and the basic unit of erasing (or garbage collection) is block, and a block is usually composed of an integer number of pages. When a page is updated or the data in the page is invalid and new data needs to be written, it is necessary to read and erase the entire block where the page is located, and then write the data into the page, which causes SSD write amplification, and the smaller the write data, the more serious the phenomenon of write amplification is. In addition, because a large amount of data migration will be caused during garbage collection under write-intensive conditions, it will cause a decline in SSD performance. At the same time, due to the lifespan of SSD Limited, therefore, frequent erasing will reduce the lifespan of the SSD

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