DMF - Functional Overview
Mission: maintain free space on disk
- Move old/big files to more efficient media
- Migrate files automatically or manually
- Maximize utilization of offline media
DMF manages native file system data
- Inodes and directories are not migrated
- Administrator orientation is file system
Administrator functions - Policy selection
- File ranking rules (candidate list)
- Capacity thresholds (file system monitor)
- Number and location of offline copies
- Tape management, journal backup and recovery
- Tape merging (garbage collection)