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

Abstract

The invention discloses a data writing method, device and equipment and a computer readable storage medium, and the method comprises the steps: receiving writing data, and judging whether the length of the writing data is greater than a preset length or not; if not, determining that the write data is small write data, and generating corresponding metadata according to the small write data; if yes,determining that the write data is capital data, and generating corresponding metadata according to the capital data; writing the small writing data, the metadata corresponding to the small writing data and the metadata corresponding to the big writing data into the SCM array, and writing the big writing data into the SSD array. According to the technical scheme disclosed by the invention, the data with relatively large data length is written into the SSD array, and the data with relatively small data length is written into the SCM array, so that the write amplification problem of the SSD inthe SSD array is relieved, the performance of the SSD is improved, and the influence on the service life of the SSD is reduced.

Description

technical field [0001] The present application relates to the technical field of data storage, and more specifically, to a data writing method, device, equipment, and computer-readable storage medium. Background technique [0002] With the expansion of flash-based SSD (Solid state drive, solid state disk) capacity and cost reduction, SSDs with high performance and low energy consumption are more and more widely used in storage systems, and SSDs are often formed into arrays for use. [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 phenomeno...

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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