A method and device for controlling I/O request

Abstract

The object of the present invention is to provide a method and device for controlling I / O requests. Specifically, the I / O request is processed according to the I / O resource quota information; the I / O resource quota information is updated; the pending I / O request among the I / O requests is scheduled to be processed according to the updated I / O resource quota information Complete the I / O request. Compared with the prior art, the present invention processes the I / O request according to the I / O resource quota information to update the I / O resource quota information, and then schedules the pending I / O request in the I / O request to be completed according to the I / O resource quota information. The updated I / O resource quota information processes the to-be-completed I / O request, and realizes precise control of the amount of data that performs I / O per unit time, effectively limits it, and reduces I / O The fluctuation range and fluctuation variance of traffic, correspondingly, also reduce the occurrence rate of system anomalies, improve the stability of system applications, and enhance the user experience of the system.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a technology for controlling I / O requests. Background technique [0002] In a modern system environment, I / O (Input / Output) services often use resources such as network bandwidth and disk read and write in a shared manner. In the system, if the resource allocation is unreasonable, it will cause resource competition of different I / O requests, resulting in system exceptions, such as: 1) If an application occupies more I / O bandwidth, it will affect the system 2) If a process takes too long, it will cause starvation of other processes; 3) Reserving unnecessary resource quotas will cause high-priority processes to fail to respond in time, for example, in In distributed storage, the egress network is occupied by data streams for a long time, resulting in the failure to send control streams and causing wrong judgment and scheduling by the central control node. In the prior art, the m...

AI Technical Summary

Problems solved by technology

In the system, if the resource allocation is unreasonable, it will cause resource competition of different I / O requests, resulting in system exceptions, such as: 1) If an application occupies more I / O bandwidth, it will affect the system 2) If a process takes too long, it will cause starvation of other processes; 3) Reserving unnecessary resource quotas will cause high-priority processes to fail to respond in time, for example, in In distributed storage, the egress network is occupied by the data flow for too long, resulting in the failure of the control flow to be sent, causing wrong judgment and scheduling of the central control node

In the prior art, the method of inferring resource quotas and controlling I / O requests based on a priori results not only has high fluctuations and deviations in actual use, but also affects the user's application access experience and even causes other problems. application instability

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