[CentOS] Right way to set IO scheduler on CentOS

Amos Shapira amos.shapira at gmail.com
Fri Nov 6 01:59:38 UTC 2009


Hello,

I'd like to set the io scheduler on some of the disks on our Dom0
(CentOS 5) to "deadline".

The way I found to do this is with "echo deadline >
/sys/block/sdb/queue/scheduler".

What is the Right Way(TM) to set this automatically during boot?

I sort of expected to use sysctl but it appears to only deal with
pseudo-files under /proc/sys, not /sys.

Also "sysctl -a" doesn't list such options.

Searching the web also only comes up with the "echo" method mentioned
everywhere.

Is my only way to add some /etc/init.d script or /etc/rc.local line?

Thanks,

--Amos


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