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== Checkpointing and live migration ==
Live migration is an ability to move a running container from one physical server to another without a shutdown or service interruption. Live migration is based on checkpointing, it does not require any special hardware, disk or networking setup.
Checkpointing is an OpenVZ kernel feature that makes it able to freeze a running container (i.e. pause all its processes) and dump its complete in-kernel state into a file on disk. Such a dump file contains everything about processes inside a container: their memory, opened files, network connections, states etc. It is possible to restore a container from a dump file and resume its execution, with. From inside the container it looks like a mere jump forward in time, there are no other side effects. Container can also be restored on a different system, and if its file system is the same it will continue to run as is on a new system.
Checkpointing is currently supported for x86, x86_64 (previously it was also supported on IA64).
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== Miscellaneous topics ==
