Pp. 11–20 of the Proceedings

Next: Abstract

DMFS - A Data Migration File System for NetBSD

William Studenmund
Veridian MRJ Technology Solutions
NASA/Ames Research Center²

• Abstract
• Introduction
  • volman system
  • vvm system
  • DMFS system
• Description of DMFS
  • Layered file system
  • Functions
  • Metadata
  • Comparison with other projects
• NetBSD vfs changes
  • The OVERLAY file system
  • Layering works
  • Most file systems do real locking
  • New vnode lock location and chaining
  • New flag returned by lookup:
    PDIRUNLOCK
  • ``layerfs'' library added
  • File Handles usable in the context of a local filestore
  • VOP_FCNTL added
  • New ls -l reporting
• Archival
• Restoration
• Behavior of typical operations
  • read(2)
  • write(2)
  • truncate(2)
• Performance
• Conclusion
• Acknowledgements
• Bibliography
• About this document ...