Question

What is the Open Virtualization Format, and how does it facilitate the migration of virtual machines between hypervisors?

Answer 1

What is the Open Virtualization Format?

OVF or Open Virtualization Format is a specification or standard platform-independent, efficient
for packaging and distrubuting for virtual machines.
it is a file extenstion in which it exported.
It contains multiple files in a single directory and for metadata uses XML file that contains
critical info like specs required for deploying VM.
All major cloud vendors(VMware, RHEL, AWS, GCP) support ovf format.
It is managed by Distributed Management Task Force (DMTF).
OVF come in existense from collaboration of all major vendors.

and how does it facilitate the migration of virtual machines between hypervisors?

for migrating any VM it must converted to OVF template and every vendor has a tool.
OVF verifies the condition of VM and check for standards.
while on deploying on another hypervisor let say it was exported from VMware EXSI and deploying to Hyper-V
it check the specs that bundled in OVF package, after passing all the test it get deployed to host.
Then server loads all the file and memory state.