Method and apparatus for controlling QoS

Abstract

Embodiments of the present invention disclose a method and an apparatus for controlling QoS, relate to the field of communications technologies, and solve the problem that each application determines an I / O delivery order according to an application priority, which causes an overall IOPS value of a system to be unstable and affects overall QoS performance of the system. The method of the present invention comprises: setting a lower limit ensured queue and a normal queue corresponding to each application; when an I / O message required to be delivered by an application is received, inserting the I / O required to be delivered by the application into the lower limit ensured queue corresponding to the application; when the lower limit ensured queue corresponding to the application is full, and a remaining I / O required to be delivered by the application exists, inserting the remaining I / O required to be delivered by the application into the normal queue corresponding to the application; when I / O is required to be delivered, delivering, in turn, the I / O in the lower limit ensured queue corresponding to each application; and when the lower limit ensured queue corresponding to each application is empty, delivering the I / O in the normal queue corresponding to each application.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for QoS control. Background technique [0002] With the gradual decline of SSD (Solid State Drives, solid state drive) media costs, it has become more and more popular to use SSDs as primary storage media in storage systems. In a storage system, a cluster of SSD storage media can provide resources that far exceed the requirements of a single application. Therefore, multiple applications are usually run on a cluster of SSD storage media to avoid waste of SSD storage media resources. When multiple applications run at the same time, the applications will inevitably compete for storage resources, for example, the order in which the I / O (Input / Output, input / output) of each application is delivered, etc., which will not guarantee the performance of the application. In order to ensure the performance of some applications, a QoS (Quality of Service, Qu...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for QoS control, which can solve the problem that each application determines the order of I / O delivery through application priority, which may easily lead to unstable IOPS values ​​of the entire system and affect the overall QoS performance of the system.

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