Author: Clemens Koller Date: To: Matt CC: exim-users Subject: Re: [exim] Speeding Up Exim
Hello, Matt!
Matt wrote: > I wander if the SATA feature of NCQ would speed the disk I/O up but
> there is likely no easy way to upgrade CentOS 4.x to do that.
AFAICT CentOS 4.5 kernel was originally based on 2.6.9. A long time
has passed since then and the 2.6.21/2.6.22 kernels where the new
libata based disk subsystem (starting with the nice features you are
looking for) was first included in the kernel.
The upgrade should still be doable (depending on your skills).
The most significant change you might experience is the new udev
device structure which replaced devfs at around ~2.6.12 IIRC.
Anyway. I'd give it a shot if you have some minutes of downtime.
Well, if you update... go to the latest stable tree.
