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.
Regards, Dennis