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

[Dominique Ramaekers]

Please read: https://libvirt.org/formatdomain.html


-----Oorspronkelijk bericht-----
Van: Jatin Davey [mailto:jashokda at cisco.com] 
Verzonden: dinsdag 14 april 2015 13:39
Aan: Daniel P. Berrange
CC: Dominique Ramaekers; libvirt-users at 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