Re: raw vs XFS sequential write and system load

[Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>]

On Sat, 27 Oct 2007, Mario Kadastik wrote:

> Well to finally summarize, the things pointed out all helped too, but the 
> major change in system behavior came from the fact that 2.6.23 had totally 
> different virtual memory defaults than 2.6.9 and running with 2.6.23 one has 
> to change the dirty_ratio to something bigger to allow for a fast i/o machine 
> to actually handle the load. Now the four nodes we have are all running very 
> nicely and calmly and performing all the tasks we have asked from them, no 
> more see we any congestion etc.
> I have summarized my weeks of investigations into a twiki page, comments are 
> welcome:
> http://hep.kbfi.ee/index.php/IT/KernelTuning
>
> Thanks for the help,
>
> Mario
Very nice doc!

Thanks.

Justin.