tuned-adm does not change I/O scheduler

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dgerzo
Posts: 2
Joined: 2014/11/01 16:56:59

tuned-adm does not change I/O scheduler

Post by dgerzo » 2014/11/01 17:06:15

Hello, tuned-adm throughput-performance profile does not change the I/O scheduler to deadline as is documented at https://access.redhat.com/documentation ... d_adm.html:

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[root@db1ng ~]# cat /sys/block/sda/queue/scheduler 
noop deadline [cfq] 
[root@db1ng ~]# tuned-adm profile throughput-performance
[root@db1ng ~]# cat /sys/block/sda/queue/scheduler 
noop deadline [cfq] 
Any idea why? And how should I permanently change the I/O scheduler on CentOS 7?

dgerzo
Posts: 2
Joined: 2014/11/01 16:56:59

Re: tuned-adm does not change I/O scheduler

Post by dgerzo » 2014/11/01 18:36:14

OK, I found an answer for my second question at viewtopic.php?f=47&t=47345 but the first one is still valid.

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Vladi
Posts: 128
Joined: 2014/08/22 01:25:43
Location: Nyíregyháza/Hungary/EU

Re: tuned-adm does not change I/O scheduler

Post by Vladi » 2014/11/01 19:39:23

dgerzo wrote:OK, I found an answer for my second question at viewtopic.php?f=47&t=47345 but the first one is still valid.

I dont know, maybe you need to reboot.
I put

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echo noop > /sys/block/sda/queue/scheduler
into /etc/rc.local

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