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This article focuses on "how to change Linux's IO Scheduler". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to change Linux's IO scheduler.

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

Noop-A device typically used for memory storage.

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

Deadline-for a delayed scheduler, each Imax O has a latest execution time.

Anticipatory-heuristic scheduling, similar to the Deadline algorithm, but introducing a 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 Istroke 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 elevator=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

two。 Update / boot/grub/menu.lst

Add elevator=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 so far, I believe you have a better understanding of "how to change Linux's IO scheduler". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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