io-scheduler | BestHub

Raymond Ops

Apr 7, 2025 · Operations

Choosing the Right Linux I/O Scheduler: Algorithms, Commands, and Performance Benchmarks

This article explains Linux I/O scheduler concepts, compares the main algorithms (noop, cfq, deadline), shows how to view and modify scheduler settings on CentOS 6/7, and presents performance test results indicating the optimal scheduler choices for SSD and SAS disks.

CentOSSSDio-scheduler

0 likes · 6 min read

Choosing the Right Linux I/O Scheduler: Algorithms, Commands, and Performance Benchmarks

OPPO Kernel Craftsman

May 8, 2020 · Fundamentals

Linux blk-mq Multi-queue Block Device Layer Framework and Implementation

The Linux blk-mq framework replaces the legacy single-queue block layer with a two-queue architecture—per-CPU software queues and hardware dispatch queues—eliminating lock contention and interrupt overhead, pre-allocating request tags, and supporting modern multi-queue I/O schedulers to fully exploit high-IOPS SSD performance.

Block LayerLinux kernelMulti-Queue

0 likes · 20 min read

Linux blk-mq Multi-queue Block Device Layer Framework and Implementation