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

Jatin Davey jashokda at cisco.com
Tue Apr 14 11:23:52 UTC 2015


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:

********************************
<!--
WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
OVERWRITTEN AND LOST. Changes to this xml configuration should be made 
using:
   virsh edit ********
or other application using the libvirt API.
-->

<domain type='kvm'>
   <name>******</name>
   <uuid>********</uuid>
   <title>*******</title>
   <description>***********</description>
   <metadata>
     <template name="****">
       <disks>
         <location type="local" name="Local" path="/VM_DATA_01"/>
         <disk>
           <source 
file="/opt/am-data/sw-download/apps//****/ovf/****/system.vmdk" 
format="vmdk"/>
           <target file="/VM_DATA_01/****/****.qcow2" format="qcow2"/>
         </disk>
       </disks>
       <applications>
         <application>
           <name>****</name>
           <description>****</description>
           <version>****</version>
           <icon>****</icon>
         </application>
       </applications>
     </template>
   </metadata>
   <memory unit='KiB'>20971520</memory>
   <currentMemory unit='KiB'>20971520</currentMemory>
   <vcpu placement='static'>8</vcpu>
   <os>
     <type arch='x86_64' machine='rhel6.5.0'>hvm</type>
     <boot dev='hd'/>
   </os>
   <features>
     <acpi/>
     <apic/>
     <pae/>
   </features>
   <clock offset='utc'/>
   <on_poweroff>destroy</on_poweroff>
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <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>
     <controller type='usb' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
function='0x2'/>
     </controller>
     <controller type='ide' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
function='0x1'/>
     </controller>
     <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>
     <serial type='pty'>
       <target port='0'/>
     </serial>
     <console type='pty'>
       <target type='serial' port='0'/>
     </console>
     <input type='mouse' bus='ps2'/>
     <graphics type='vnc' port='-1' autoport='yes' listen='0.0.0.0' 
keymap='en-us' passwd='*****'>
       <listen type='address' address='0.0.0.0'/>
     </graphics>
     <sound model='ich6'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x04' 
function='0x0'/>
     </sound>
     <video>
       <model type='cirrus' vram='9216' heads='1'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x02' 
function='0x0'/>
     </video>
     <memballoon model='virtio'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x05' 
function='0x0'/>
     </memballoon>
   </devices>
</domain>
*******************************************

Thanks
Jatin

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