Definition - What does Hot Migration mean?
“Hot” migration in IT is the process of migrating a system that is operational and active. This is in contrast to the practice of cold migration, where the migration occurs in a system that has been turned off or rendered non-operational.
Hot migration is also known as live migration.
Techopedia explains Hot Migration
The terms hot and cold migration are often applied to the use of virtual machines in a network virtualization system. Unlike cold migration hot migration can be done without any downtime. However, there may be additional process requirements related to doing the migration with the system running.