some apps also use fork and the copy on write behaviour deliberately to implement features. redis uses it to create its backup file (http://redis.io/topics/faq

some apps also use fork and the copy on write behaviour deliberately to implement features. redis uses it to create its backup file (http://redis.io/topics/faq http://redis.io/topics/faq) >> Redis background saving schema relies on the copy-on-write semantic of fork in modern operating systems: Redis forks (creates a child process) that is an exact copy of the parent. The child process dumps the DB on disk and finally exits.