Method and device for adjusting writing bandwidths of solid-state disks

Abstract

The invention discloses a method for adjusting writing bandwidths of solid-state disks. The method includes acquiring the numbers of current remaining available physical blocks in the solid-state disks according to preset sampling periods; adjusting proportionality factors in real time according to the numbers of the available physical blocks; smoothing errors of the proportionality factors by the aid of PID (proportion, integration and differentiation) controllers according to proportionality factor difference values of a previous sampling period. The proportionality factors are ratios of GC (garbage collection) writing bandwidths to total bandwidths. The invention further discloses a device for adjusting the writing bandwidths of the solid-state disks. The method and the device have the advantages that the proportionality factors between the GC writing bandwidths and the total bandwidths are adjusted by the aid of the numbers of the real-time available physical blocks, and accordingly the accuracy of the proportionality factors can be guaranteed; the errors of the proportionality factors are controlled by the aid of the PID controllers and proportionality factors of the previous sampling period, fluctuation of the proportionality factors can be reduced, and accordingly the stability of writing bandwidths can be improved for users.

Description

technical field [0001] The invention relates to the technical field of solid-state hard disks, in particular to a method and device for adjusting write bandwidth of solid-state hard disks. Background technique [0002] For a long time in the life cycle of a solid-state drive, GC writes (Garbage Collection, a write operation during garbage collection data movement) and user writes jointly occupy the back-end bandwidth of the hard disk. The ratio between user writing and GC writing and the ratio fluctuation in a short period of time directly affect the fluctuation of writing bandwidth and the transfer efficiency of GC. [0003] In a certain period of time, if the ratio of GC write bandwidth to total bandwidth (the sum of GC write bandwidth and user write bandwidth) is too large or too small, it will cause different effects such as low user bandwidth and low GC efficiency. Moreover, if the ratio jumps in a short period of time, it will cause problems such as large fluctuations...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for adjusting the write bandwidth of a solid-state hard disk to solve the problem of unstable user write bandwidth caused by inaccurate instantaneous ratio between the existing GC write bandwidth and user write bandwidth and short-term fluctuations

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