A method and device for processing concurrent sequential read io

Abstract

The invention discloses a method and device for processing concurrent sequential reading IO. The method comprises the following steps: receiving the instruction of adjusting first pre-read depth parameters of the sequential reading IO and configuring according to the instruction; receiving the instruction of the sequential reading IO and adding the sequential reading IO to a sequential reading IO queue which the sequential reading IO belongs to; judging whether the quantity of the sequential reading IO in the queue is greater than a preset target quantity or not; if yes, adjusting the pre-read depth of the sequential reading IO according to current pre-read state parameters through dynamically adjusting second pre-read depth parameters; and invoking a backend storage interface to read IO data from a storage array according to the adjusted pre-read depth of the sequential reading IO. The method disclosed by the invention has the advantages of dynamically adjusting pre-read algorithm through dynamically adjusting relevant parameters of the pre-read IO and increasing the concurrent sequential reading IO processing efficiency of the storage array.

Description

technical field [0001] The invention belongs to the technical field of storage, and in particular relates to a method and device for processing concurrent sequential read IOs. Background technique [0002] With the development of big data, people connect more and more servers to the same storage array, and with the development of servers, multi-core CPUs will also appear on the same server, which may lead to dozens or even Sequential read IO (Input / Output) of 100 channels needs to be processed by the same storage array, which requires the IO processing algorithm of the storage array to be able to read IO sequentially concurrently. Moreover, the trigger conditions, block size, and read-ahead depth of each sequential read IO are all related to the specific application. How to dynamically adjust the storage read-ahead algorithm so that it can keep up with the development of the application becomes a question of whether the storage array can keep up with the development of the a...

AI Technical Summary

Problems solved by technology

But this is inconvenient for the customer environment with multiple application scenarios. For example, it is necessary to analyze the characteristics of the customer's application, modify the algorithm according to the corresponding application, compile and test, etc., and the operation is cumbersome.

And usually only single-way read IO is considered, and there is no corresponding method to deal with concurrent multi-way sequential read IO

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