SSD instruction scheduling method and system based on storage content priority

Abstract

The invention discloses an SSD (Solid State Disk) instruction scheduling method and system based on storage content priority. The method includes that aiming at a large number of data read-write commands issued to an SSD by a server host, when a data queue is constructed, an identifier and a priority factor of operated data are added; when the priority factor is started, a data read-write command issued to the SSD by the server host comprises a data identifier and the priority factor, the priority factor is added in a management command issued to the SSD, the management command is placed at the head of a management queue, and the management command with the priority factor is preferentially delivered to the microprocessor for execution in the next cycle through the scheduling of the command queue control module, and the microprocessor starts the command queue control module based on the priority factor according to the newest management command and begins to poll the data queue. The method and system can adapt to an application environment with high capacity, high concurrency and multi-cross read-write access.

Description

technical field [0001] The invention relates to the field of solid-state storage, especially the instruction scheduling of solid-state storage, and specifically relates to a method and system for scheduling ssd instructions based on storage content priority. Background technique [0002] In large-scale data centers, the scale of data storage is growing rapidly and the performance of data processing is rapidly improving. Traditional HDD mechanical disks using SATA interface and AHCI storage protocol have exposed bottlenecks in terms of read and write bandwidth and concurrent IOPS, which cannot meet the high concurrency and high Bandwidth data read and write applications. As a substitute for traditional HDD mechanical disk, SSD solid-state disk adopts newer storage media, brand-new host interface and storage protocol, and has better storage effect. [0003] In the standard SSD solid-state disk, in order to give full play to the concurrent read and write performance of the mul...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the waiting state of data read and write operations in the SSD solid state disk will further negatively feed back to the host application, increasing its waiting time, which causes massive access to compete for limited resources, causing all operations to be stuck in a long-term Mutual waiting state

[0006] As can be seen from the above description, in large-scale, high-concurrency, multi-cro

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