[CentOS-virt] I/O load distribution

Mon Jul 27 15:56:02 UTC 2009
Dennis J. <dennisml at conversis.de>

On 07/27/2009 05:12 PM, Ben Montanelli wrote:
> I am certainly no expert on Xen. I have read through docs and various
> threads a bit considering the I/O demands and have the impression that
> there are a couple of primary factors to work with (please correct me if
> I'm wrong). My comprehension is far from complete.
> 1 - Select which scheduler, weight and cap to use. Some favor
> computation over I/O and vice versa. If your dom's are "fighting" over
> disk I/O this is the referee and enforces the rules YOU choose to keep
> it "fair" and efficient as possible.
> Suggested read, document date apparently Jul-18-2009:
> <http://cseweb.ucsd.edu/~dgupta/papers/per07-3sched-xen.pdf>

Thanks for that. I'll probably move most of my Xen VMs over to KVM as soon 
as that becomes a viable option but this should help me getting my bearings 
with regards to understanding the overall scheduling and I/O topics.