Which feature enables live migration of running virtual machines with minimal downtime?

Which feature enables live migration of running virtual machines with minimal downtime?

• A. HA
• B. DRS
• C. vMotion
• D. VMFS

Answer: (C)

Live migration of a running virtual machine with minimal downtime is enabled by vMotion. vMotion moves the VM’s memory, CPU state, and devices from one host to another while the VM continues to run. It starts with copying active memory pages from the source to the destination in the background, letting the VM keep executing and tracking pages that change. When most of the pages have been copied, a brief freeze happens to transfer the last changes, and the VM resumes on the destination with the same network identity and storage access. This process yields near-zero downtime from the user’s perspective. Other features don’t perform live migrations themselves: High Availability reboots VMs on another host after a failure, DRS shifts VMs to balance load, and VMFS is simply a shared datastore format for VM files.

Live migration of a running virtual machine with minimal downtime is enabled by vMotion. vMotion moves the VM’s memory, CPU state, and devices from one host to another while the VM continues to run. It starts with copying active memory pages from the source to the destination in the background, letting the VM keep executing and tracking pages that change. When most of the pages have been copied, a brief freeze happens to transfer the last changes, and the VM resumes on the destination with the same network identity and storage access. This process yields near-zero downtime from the user’s perspective. Other features don’t perform live migrations themselves: High Availability reboots VMs on another host after a failure, DRS shifts VMs to balance load, and VMFS is simply a shared datastore format for VM files.