the process that is dumping data to an output file will not be killed
untill the environment or the user is changing the permission bits of the file to which it is dumped, or file descriptor problem, invalidating file handler etc.

when we want to view the file where data is dumped the shell provides you with a different file handler without affecting the prime process that is dumping into the file. Hence there is no consistency problem as far as reading a file and taking a copy is concerned.