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The purpose of this article is to share with you about how to change the Icano scheduler in the Linux system. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article.

The Linux Imax O scheduler, which is a part of the Linux kernel, is a process that accesses storage volumes with block Imax O.

At present, there are the following scheduling algorithms on Linux:

1. Noop-A device typically used for memory storage.

2. Cfq-full fair scheduler. The average process uses IO bandwidth.

3. Deadline-for a delayed scheduler, each I _ hand O has a latest execution time.

4. Anticipatory-heuristic scheduling, similar to Deadline algorithm, but introducing prediction mechanism to improve performance.

View the device's current Istroke O scheduler:

"``

# cat / sys/block//queue/scheduler

"``

Suppose the disk name is `/ dev/ sdc`:

"``

# cat / sys/block/sdc/queue/schedulernoop anticipatory deadline [cfq] "`

# how to change the hard disk device Iram O Scheduler

Use the following instructions:

"``

# echo {SCHEDULER-NAME} > / sys/block//queue/scheduler

"``

For example, set up the noop scheduler:

"``

# echo noop > / sys/block/sdc/queue/scheduler

"``

The above settings will expire after restart. If you want the configuration to take effect after restart, you need to write `Noop` to `/ boot/grub/ menu.lst` in the kernel startup parameters:

# 1. Backing up menu.lst files

"``

Cp-p / boot/grub/menu.lst / boot/grub/menu.lst-backup

"``

# 2. Update / boot/grub/menu.lst

Add `Noop` to the end of the file, such as:

"``

Kernel / vmlinuz-2.6.16.60-0.91.1-smp root=/dev/sysvg/root splash=silent splash=off showopts elevator=noop

"``

What is Linux system Linux is a free-to-use and free-spread UNIX-like operating system, is a POSIX-based multi-user, multi-task, multi-threaded and multi-CPU operating system, using Linux can run major Unix tools, applications and network protocols.

The above is how to change the Linux O scheduler. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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