Teleporting Virtual Machines: Flipping the Script (opens in new tab)

In the previous post in this series, Teleporting Servers, we examined how to move a live virtual machine between physical hosts using the pre-copy method. Pre-copy transfers the VM’s memory in multiple rounds while the source keeps running. When the number of dirtied pages falls below a configurable writable working set (WWS) threshold—or a preset maximum number of iterations is reached—the VM is suspended and its CPU state plus any remaining dirty pages are sent to the target host; that fina...