Disk flow control method and device and electronic device

Abstract

The invention discloses a disk flow control method. The method comprises the following steps of obtaining a read-write parameter of a disk in at least one read-write thread; judging whether the read-write parameters meet a flow control adjustment condition or not, and if yes, setting the disk state of the disk as a flow control state; and adjusting a flow control threshold value corresponding to the read-write parameter of the disk. According to the disk flow control method, the read-write pressure of the read-write threads is balanced while the flow control adjustment is conducted on the disk, meanwhile, it is guaranteed that the read-write threads of the disk do not interfere with one another, and the flow control time consumption is shortened.

Description

Technical field [0001] This application relates to the field of data storage, in particular to a disk flow control method. This application also relates to a disk flow control device and an electronic device. Background technique [0002] In the cloud computing environment, multiple virtual machines can be virtualized on one physical machine, and multiple virtual machines share the physical machine’s CPU, memory, network and back-end storage resources; in this sharing mode, to ensure SLA (Service-Level Agreement, Service-Level Agreement) requires restrictions on the resources that virtual machines can use to prevent a single virtual machine from using too many shared resources to affect the performance of other virtual machines. And one of the most important items is storage resources. The virtual machine is equipped with a system disk and several data disks. Various applications in the virtual machine will read and write data to these disks, that is, send read and write (I / O) r...

AI Technical Summary

Problems solved by technology

[0004] However, in scenarios where read and write speeds are relatively high, such as high-performance disks with millions of IOPS and microsecond delays, the current flow control device provided by the current flow control method has become one of the bottlenecks of the entire storage system. First, the reason is that all I / O request streams flow through a common flow control device and pass through serially, which limits the processing efficiency of I / O request streams

At the same time, since the I / O request of a disk will be distributed to multiple I / O request threads, the current single-queue mode of the flow control module needs to lock between multiple threads to ensure the accuracy of flow control. As a result, the I / O latency is not low, and the time-consuming lock operation is a non-negligible overhead for high-performance, low-latency disks

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