What can free hypervisors do?

Question

virtual box

Somehow it so happened historically that I work mainly with the flagships of the virtualization market - Hyper-V and VMware. Well, the lonely VirtualBox is spinning at home. And a simple question arose - what can other hypervisors do? Do they have all these great features:

• Live migration of virtual machines from host to host?
  
• live migration of virtual machines from storage to storage?
  
• "share nothing" migration (when there is nothing in common between the hosts between which the virtual machine is moved, even a shared storage?
  
• do they have snapshots suitable for backup?
  
• whether there are mechanisms of replication of virtualok?
  

In general, who has experience with virtualization systems other than VMware and Hyper-V, tell me, pls, how are things going with the above with your hypervisors.

Answer 1

do they have snapshots suitable for backup?

This is available in KVM if you set up LVM (in proxmox out of the box). But I will never do this on a working virtual machine, since during such operations the speed of the disk subsystem in the guest drops several times (in short, the guest becomes almost unusable). I personally have no sense in pulling the cat by the tail, it's easier to turn off the guest and copy one file through mc.

Answer 2

everyone seems to be able to