[Discuss] Virt-Manager

[epp at sillydog.org (Edward)]

Virt-manager created it as a .qcrow2 by default, did not know what that 
was. There was also an indication that 'the KVM package' was not 
installed and as a result, it would run slowly. I would have expected 
the installation of virt-manager to also pull in all required 
dependencies. Debian does not provide a package named 'kvm' and 
searching using that string under Description & Name with Synaptic, 
found no such packages that looked like it would install KVM.

I believe the file system it is using, is ext4.


On 10/20/21 3:00 PM, markw at mohawksoft.com wrote:
> I use KVM all the time and manage it with virt-manager.
>
> (1) Make sure that network and disk use VirtIO para-virtual driver, do not
> emulate physical devices.
>
> (2) Don't use qcow2, its really slow. Pre-allocate your boot drive:
>
> touch myboot.raw
> truncate -s SIZE myboot.raw
>
> The above will let you define a large thin-provisioned disk.
>
> If you have LVM or ZFS you can create a logical volume or zvol, but I
> think the thin provisioned "sparse" file may be faster because of the
> double caching.
>
>> On 10/18/21 9:20 PM, Edward wrote:
>>> I missed a setting, found it afterwards, it defaults to Virtual Network
>>> (NAT) and the box to start it automatically was initially not checked.
>>>
>>> It's working now.
>>>
>> And it (take your pick):
>>
>>    * is slow as molasses
>>    * runs at a snail's pace
>>
>>
>> Not even worth using. Gnome Boxes on Fedora 33 ran far better and faster
>> than Virt Manager does on Debian.