From the birth of thehybrid cloud concept, companies have dreamed of finally achieving the elusive free-flowing workload migration.
Moving or migrating virtual machines from on-premises to the public cloud has theoretically been possible for some time, but in practice it has proven difficult. Reasons for this difficulty include the differences between on-premises private clouds and public clouds, virtual machine file format differences (for example, Qcow, OVA, OVF), and virtual disk differences (for example, VHD, VMDK, .raw).