vMotion has been around for more than fifteen years. The first version was introduced in 2003, which means it is a mature technology.
vMotion utilizes a similar technology (similar based on its behavior, but completely different from a technical perspective) as a snapshot. When you invoke vMotion, a snapshot of the memory is created, allowing new write operations to memory to be stored in a dedicated, known, section. Then, the content of the memory is migrated, and in the end, the data that has changed during the vMotion invocation are synced.
You might be wondering why you should use vMotion, so there is a list of several tasks that involves the use of vMotion:
- ESXi maintenance mode: If you have a DRS-enabled cluster, DRS ...
