METHOD OF AND DEVICE FOR STORING DATA IN COMPUTERS

摘要

In a hierarchical storage management system, files are automatically archived when they have not been accessed for a specified period. With large database files, the file cannot be archived, even though only a small number of records has been used. In this invention an auxiliary database is maintained indicating which data blocks have been accessed and on what dates. Non-accessed blocks and then be archived and deleted from the disk file to reduce storage requirements.