Namespace-based bandwidth control method, device and storage medium

Abstract

The embodiment of the invention discloses a namespace-based bandwidth control method, a device and a computer-readable storage medium, wherein, according to a namespace identification code carried ina read-write command, the received read-write command is stored in a corresponding waiting queue; Judging whether the read/write bandwidth value occupied by the current read/write command in the target waiting queue is less than or equal to the preset target bandwidth value; If yes, executing the current read/write command, and returning the next read/write command adjacent to the current read/write command as a new current read/write command; If not, the next waiting queue adjacent to the target waiting queue can be taken as a new target waiting queue and returned to the determination step. In the technical scheme, the solid state disk can be divided into a plurality of namespaces, and the bandwidth of each namespace can be limited to achieve the purpose of preventing bandwidth preemption, reducing the occurrence of bandwidth jitter, and improving the quality of service of the solid state disk.

Description

technical field [0001] The present invention relates to the technical field of solid state disks, in particular to a namespace-based bandwidth control method, device and computer-readable storage medium. Background technique [0002] In practical applications, SSDs are often divided into different namespaces (Name Space, NS), and different NSs are generally assigned to different users by the host, which may cause the host to have different reading and writing pressures on different NSs. . [0003] For a solid state disk (Solid State Disk, SSD), the quality of service (Quality of Service, QOS) mainly includes read and write bandwidth and bandwidth jitter. The read and write bandwidth of SSD is limited. When multiple users access SSD under high pressure at the same time, there will be competition for read and write bandwidth. For example, when a target NS in the SSD is accessed frequently, the target NS will occupy a large bandwidth value, and when other NSs are accessed, th...

AI Technical Summary

Problems solved by technology

For example, when a target NS in the SSD is accessed frequently, the target NS will occupy a large bandwidth value. When other NSs are accessed, the bandwidth occupation of the target NS may cause delays in accessing other NSs.

And due to bandwidth preemption, bandwidth distribution will be uneven, resulting in severe bandwidth jitter

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