Custom tuned profile in RHEL7
Feb 4, 2015 09:09 · 205 words · 1 minute read
Tuned has been improved from RHEL6 and the process to create a custom tuned profile has changed. The syntax is now “ini”fied and the process to create a custom profile (i.e.- my-virtual-host) is slightly different. In this example, I’ll modify the virtual-host profile and add some script to customize it:
Install tuned (if it’s not installed yet)
yum install -y tuned
Create a directory inside
/etc/tuned
named “my-virtual-host”mkdir -p /etc/tuned/my-virtual-host/
Create a custom profile and include the virtual-host one:
cat > /etc/tuned/my-virtual-host/tuned.conf << EOF # # tuned configuration # [main] include=virtual-host [script] script=script.sh EOF
Create a custom script:
cat > /etc/tuned/my-virtual-host/script.sh << EOF #!/bin/sh . /usr/lib/tuned/functions SSD=sda start() { echo "noop" > /sys/block/${SSD}/queue/scheduler return 0 } stop() { echo "deadline" > /sys/block/${SSD}/queue/scheduler return 0 } process $@
Make it executable:
chmod a+x /etc/tuned/my-virtual-host/script.sh
Active it:
tuned-adm profile my-virtual-host
Check it:
tuned-adm active Current active profile: my-virtual-host cat /sys/block/sda/queue/scheduler [noop] deadline cfq
As you’ve noticed, I’ve created a custom script to modify the scheduler of my
/dev/sda
device. I’ve tried to make it work without creating a custom script
(as the Red Hat instruction says in
https://access.redhat.com/solutions/1305833), adding the following to the
custom tuned.conf file:
[disk]
devices=sda
elevator=noop
But it didn’t work for me.
HTH