Re: [libvirt-users] VM Performance using KVM Vs. VMware ESXi

Please read: https://libvirt.org/formatdomain.html -----Oorspronkelijk bericht----- Van: Jatin Davey [mailto:jashokda@cisco.com] Verzonden: dinsdag 14 april 2015 13:39 Aan: Daniel P. Berrange CC: Dominique Ramaekers; libvirt-users(a)redhat.com Onderwerp: Re: [libvirt-users] VM Performance using KVM Vs. VMware ESXi On 4/14/2015 4:58 PM, Daniel P. Berrange wrote: > On Tue, Apr 14, 2015 at 04:53:52PM +0530, Jatin Davey wrote: >> On 4/14/2015 4:42 PM, Dominique Ramaekers wrote: >>> About Spice: I think it’s good practice to use spice because it >>> improves the performance of the VM in general by improving screen >>> performance. If your VM is constantly displaying output, you’ll >>> probably will notice a difference. >>> >> [Jatin] Ok, This is not my concern as of now. I will take a look at >> it sometime later. >>> About virtio: You can see it in the settings. Better yet, it’s in >>> your XML. If you post your XML, we can take a look… >>> >> Here is the xml associated with my VM: >> >> ******************************** >> <domain type='kvm'> >> <devices> >> <emulator>/usr/libexec/qemu-kvm</emulator> >> <disk type='file' device='disk'> >> <driver name='qemu' type='qcow2' cache='none'/> >> <source file='/var/lib/libvirt/images/****.qcow2'/> >> <target dev='hda' bus='ide'/> >> <address type='drive' controller='0' bus='0' target='0' unit='0'/> >> </disk> > This disk is configured to use IDE, so performance of anything that > does disk I/O is going to be terrible. You really want to be using virtio. > >> <interface type='bridge'> >> <mac address='52:54:00:c9:58:c9'/> >> <source bridge='br332'/> >> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> >> </interface> > This doesn't have any model listed at all, so it will be falling back > to a generic emulated NIC. Again performance of this is likely going > to be terrible for anything doing network I/O. You want to be using > virtio for this too. > > Regards, > Daniel How do i make use of virtio for the both disk and network that you have mentioned above ? Any pointers to it would be helpful. Thanks Jatin