The first implementation of process migration was in the DEMOS/MP operating project at the University of California, Berkeley and was described in a 1983 paper by Barton Miller and Michael Powell.
This involves redirection of the I/O data stream over the network and has disadvantages concerning security, performance and reliability.
The phenomena that a host computer must provide services to a process that migrated away is called Residual Dependency.
Depending on the execution of the process, tables need to be searched, copied, altered and re-established on the destination system.
Reference http://www.klammeraffe.org/~fritsch/uni-sb/fsinfo/Papers/migrate/node4.html An alternate definition of process migration is used in integrated circuit design and engineering.