Hi Eric... I'm using virtio drivers on my hosts... Both Xen and KVM.
What I see is the KVM has been easier to manage and maitain. Also, KVM is more easier to implement, 'cause I don't need re-compile the kernel...It's just do a modprobe and everything is well... Thanks 2010/7/26 Eric Searcy <[email protected]>: > On Jul 26, 2010, at 12:03 PM, Gilberto Nunes wrote: > > [...] >> What you thing about??? > > As far as running 15 VMs, whether your hardware is suited to do that depends > on how many spindles worth of SAS drives you have (improves concurrency), how > busy your VMs are (IO and proc), how much the guests are swapping in case > you're not giving them enough memory. And if you're not running virtio > drivers, you should! > > I don't have the numbers, but several months ago I tested a few different > Iometer meter workloads on Server 2003 R2 guests on PE1950 hardware against > equivalently-matched VMs on the 1.x version of a popular proprietary product > (dedicated memory instead of its default swap-mem-to-host-disk; also running > the guest extensions), Xen on CentOS 5.4 with a then-recent build of GPLPV > (meadowcourt.org/downloads) on the guests, and KVM (also CentOS 5.4) with > somebody's build of unsigned virtio Windows drivers (was on a /~public_html > from redhat.com I think). > > Results: Xen+GPLPV beat out KVM+virtio enough to be considered significant, > but their difference seemed small compared to the margin they beat the other > contender by. The proprietary one also had massive CPU load on the guest > generated by running the test that the others didn't have. > > Obviously that's all very vague, but then again I'm sure somewhere I've > accepted a EULA that says I'm not allowed to share benchmarking results for > certain products :-). > > I'll be keeping Xen (and therefore CentOS 5.x) around to run Linux guests > blazingly fast on still-usedful hardware. Everything else I'm (slowly) > migrating to KVM in the interest of tracking with upstream. Xen's slight > performance edge on Windows will be missed. > > YMMV. > > Eric > _______________________________________________ > CentOS-virt mailing list > [email protected] > http://lists.centos.org/mailman/listinfo/centos-virt > -- Gilberto Nunes _______________________________________________ CentOS-virt mailing list [email protected] http://lists.centos.org/mailman/listinfo/centos-virt
