Malinux' notes - Revision history

Malinux at 11:33, 10 December 2021

2021-12-10T11:33:50Z

← Older revision		Revision as of 11:33, 10 December 2021
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	source: https://wiki.archlinux.org/title/Improving_performance#Changing_I/O_scheduler		source: https://wiki.archlinux.org/title/Improving_performance#Changing_I/O_scheduler

			==DNS with bind==
			<syntaxhighlight lang="bash">
			# one liner to edit/add a dns name and make the change persistent and to see in the log afterwards that it works
			rndc freeze domain.no ; vi /etc/bind/domain.no.zone ; rndc thaw domain.no ; tail -f /var/log/daemon.log
			</syntaxhighlight>

2021-11-21T13:57:44Z

BFQ I/O scheduler

← Older revision		Revision as of 13:57, 21 November 2021
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	</syntaxhighlight>		</syntaxhighlight>
	You know have changed scheduler to bfq		You know have changed scheduler to bfq
	To make this survive a reboot you can add this snippet I borrowed from the arch wiki that		To make this survive a reboot you can add this snippet I borrowed from the [https://wiki.archlinux.org/title/Improving_performance#Changing_I/O_scheduler arch wiki] that
	set scheduler based on hard drive type. none for nvme, mq-deadline for ssd and none for nvme		set scheduler based on hard drive type. none for nvme, mq-deadline for ssd and none for nvme
	Add the snippet to /etc/udev/rules.d/60-ioschedulers.rules		Add the snippet to /etc/udev/rules.d/60-ioschedulers.rules

2021-11-21T13:05:58Z

BFQ I/O scheduler

← Older revision		Revision as of 13:05, 21 November 2021
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	set scheduler based on hard drive type. none for nvme, mq-deadline for ssd and none for nvme		set scheduler based on hard drive type. none for nvme, mq-deadline for ssd and none for nvme
	Add the snippet to /etc/udev/rules.d/60-ioschedulers.rules		Add the snippet to /etc/udev/rules.d/60-ioschedulers.rules
	<syntaxhighlight lang="bash"		<syntaxhighlight lang="bash">
	# set scheduler for NVMe		# set scheduler for NVMe
	ACTION=="add\|change", KERNEL=="nvme[0-9]n[0-9]", ATTR{queue/scheduler}="none"		ACTION=="add\|change", KERNEL=="nvme[0-9]n[0-9]", ATTR{queue/scheduler}="none"

2021-11-21T13:05:34Z

BFQ I/O scheduler

← Older revision		Revision as of 13:05, 21 November 2021
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	</syntaxhighlight>		</syntaxhighlight>
	You know have changed scheduler to bfq		You know have changed scheduler to bfq
	To make this survive a reboot you can add this snippet from the arch wiki that		To make this survive a reboot you can add this snippet I borrowed from the arch wiki that
	set scheduler based on hard drive type. ~~noen~~ for nvme, mq-deadline for ssd and none for nvme		set scheduler based on hard drive type. none for nvme, mq-deadline for ssd and none for nvme
			Add the snippet to /etc/udev/rules.d/60-ioschedulers.rules
	<syntaxhighlight lang="bash"		<syntaxhighlight lang="bash"
	# set scheduler for NVMe		# set scheduler for NVMe
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	# set scheduler for rotating disks		# set scheduler for rotating disks
	ACTION=="add\|change", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"		ACTION=="add\|change", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"
	</syntaxhighlight ~~lang="bash"~~>		</syntaxhighlight>

	source: https://wiki.archlinux.org/title/Improving_performance#Changing_I/O_scheduler		source: https://wiki.archlinux.org/title/Improving_performance#Changing_I/O_scheduler

2021-11-21T12:59:40Z

BFQ I/O scheduler

@@ Line 55: / Line 55: @@
 === BFQ I/O scheduler ===
 I use BFQ btw. BFQ is a bloody fast I/O scheduler, best suitable with HDD's.
 source: https://wiki.archlinux.org/title/Improving_performance#Changing_I/O_scheduler

2021-11-21T12:49:50Z

Disable NCQ

← Older revision		Revision as of 12:49, 21 November 2021
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			== HDD hacks ==
	=== Disable NCQ ===		=== Disable NCQ ===
	Disabling NCQ (Native Command Queuing) can in some circumstances improve performance on HDD's		Disabling NCQ (Native Command Queuing) can in some circumstances improve performance on HDD's

2021-11-21T12:47:49Z

Disable NCQ

← Older revision		Revision as of 12:47, 21 November 2021
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	=== Disable NCQ ===		=== Disable NCQ ===
	Disabling NCQ (Native Command Queuing) can in some circumstances improve performance		Disabling NCQ (Native Command Queuing) can in some circumstances improve performance on HDD's

	<syntaxhighlight lang="bash">		<syntaxhighlight lang="bash">

2021-11-21T02:55:35Z

Disable NCQ

← Older revision		Revision as of 02:55, 21 November 2021
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	</syntaxhighlight>		</syntaxhighlight>

	===BFQ I/O scheduler		=== BFQ I/O scheduler ===
	I use BFQ btw. BFQ is a bloody fast I/O scheduler, best suitable with HDD's.		I use BFQ btw. BFQ is a bloody fast I/O scheduler, best suitable with HDD's.
	source: https://wiki.archlinux.org/title/Improving_performance#Changing_I/O_scheduler		source: https://wiki.archlinux.org/title/Improving_performance#Changing_I/O_scheduler

2021-11-21T02:55:02Z

← Older revision		Revision as of 02:55, 21 November 2021
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	</syntaxhighlight>		</syntaxhighlight>

	To have this survive a reboot and ~~work~~ for all your hdd's or ssd's we can make a systemd script		To have this survive a reboot and disable ncq for all your hdd's or ssd's we can make a systemd script
	First we make a bash script that the systemd script run		First we'll make a bash script that the systemd script run
	<syntaxhighlight lang="bash">		<syntaxhighlight lang="bash">
	#!/bin/bash		#!/bin/bash

2021-11-21T02:54:00Z

Disable NCQ

@@ Line 5: / Line 5: @@
 # To check if ncq is already off, its' likely not if you haven't already turned it off
 cat /sys/block/sdX/device/queue_depth
-# it will return 32 if it's on
+# it will return 32 if it's on and 1 if it's turned off
 # To turn it off:
-echo 1 > /sys/block/sdk/device/queue_depth
+echo 1 > /sys/block/sdX/device/queue_depth
 </syntaxhighlight>