Hi,

On Jan 5, 2011, at 13:30, g1vrg wrote:

> Hi, I have noticed that in default SL5.5 disk operations tend to hugely
> tie up my pc. For example when writing large files (of the order of 10
> GB) I may have to wait 30 seconds before I can get a response from
> another application on the desktop. Is there another i/o scheduler other
> than the default that I can specify presumably as a kernel command in
> the grub boot loader config file? I recently swapped over from debian
> lenny and the i/o scheduler there

which one was it?

You can change I/O schedulers per block device on the fly:

# cat /sys/block/sda/queue/scheduler
noop anticipatory deadline [cfq] 
# echo noop >> /sys/block/sda/queue/scheduler
# cat /sys/block/sda/queue/scheduler
[noop] anticipatory deadline cfq 

I guess you get the idea. Let us know which one works best for you (and what hardware you have).

Regards
	Stephan

> was much more equitable to the point
> where the desktop user didn't notice - it meant disk writes were slower
> but I can put up with that. Sorry if this has already been asked
> recently
> 
> Thanks.
> 
> Richard

-- 
Stephan Wiesand
DESY -DV-
Platanenallee 6
15738 Zeuthen, Germany