FIELD: control over hierarchic storage in computer network. SUBSTANCE: method for transfer of data in real time in network computer system uses key of operational system-rarefied file to present transferred file. Rarefied file occupies minimal value of physical space in service file processor but is determined as one having same size and attributes as initial file. When user refers to transferred file this file seems to be constantly present in service file processor and is openly returned to service file processor from optimized storage position in system controlling hierarchy storage. EFFECT: provision for transfer of data file and its return to storage of computer network without use of fictitious file. 7 cl, 6 dwg
