Re: [Xen-users] heavy write crashing, was: process limit

[Anand <xen.mails@xxxxxxxxx>]

On 1/14/06, Tim Freeman <tfreeman@xxxxxxxxxxx> wrote:

Yes, the disk I/O scheduling entry on the Xen roadmap is very interesting to us!

http://www.cl.cam.ac.uk/Research/SRG/netos/xen/roadmap.html

It's listed under the "Enhanced QoS features" bullet.  I wonder if "providing
better tools" means an implementation from scratch or a mix of current tools
integrated with Xen?

I read that as well. This is something which is really required since any IO intensive process can create havoc for the entire host and other domU's.

I noticed during the domU bootup, the bootup messages contains info about IO schedulers however they don't seem to be working as of now. You can pass elevator=io_scheduler_name to the kernel to change the io scheduler (i posted this information in another message to the list).

My guess is they should be using the linux IO scheduler code directly since its something which is already available. On top some more features could be added which can help restrict IO on some domains.

-- 

regards,

Anand
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