On Thu, Jan 20, 2005 at 11:53, [EMAIL PROTECTED] wrote:
> hi,
> 
> which is the best io-scheduler for FTP server ( with  IDE-RAID card) ?
Probably the anticipatory scheduler.
If you get high load, the CFQ might be better.

> Any other tweaks to increase io performance...
hdparm? reiser4? Tuning PCI latencies with setpci?

> And not to forget how can I select one on bootup ?
pass elevator=anticipatory as kernel parameter

> can i change it after the system is running ?
yes, 
To see the current scheduler on hda:
$ cat /sys/block/hda/queue/scheduler
noop [anticipatory]

To change it:
# modprobe cfq-iosched (if compiled as module)
# echo cfq > /sys/block/hda/queue/scheduler

JC

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