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

[Dennis Jacobfeuerborn]

On 14.04.2015 15:16, Jatin Davey wrote:
> On 4/14/2015 6:32 PM, Tom Hughes wrote:
>> On 14/04/15 13:33, Jatin Davey wrote:
>>
>>> Thanks Dominique & Daniel.
>>>
>>> Looks like i need to upgrade my VMs kernel to make it aware of virtio.
>>>
>>> Found this information from this link:
>>>
>>> http://wiki.libvirt.org/page/Virtio#Disk_.28block.29_device_driver
>>>
>>> I tried without upgrading the Kernel and as soon as i start my VM it got
>>> into Kernel Panic. I will try using virtio after upgrading my VMs
>>> kernel.
>>
>> As somebody has already said it would have to be a really old kernel
>> to not handle virtio-block, and it's more likely that your bootloader
>> and/or initrd are confused by sda becoming vda.
>>
>> However if your kernel supports it then virtio-scsi should be even
>> better than virtio-block and shouldn't cause the device name to change.
>>
>> Tom
>>
> My VM is using the kernel 2.6.18-164.el5
> 
> [root at localhost ~]# uname -a
> Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64
> x86_64 x86_64 GNU/Linux
> 
> Should this be fine ?

Is there any particular reason why you are using RHEL 5? The current
version is RHEL 7 which contains much more up-to-date versions of
kernel, qemu and other virtualization tools.

Regards,
  Dennis