nova-fortis · research · also NOVA Fortis

NOVA-Fortis

NOVA-Fortis is a research persistent-memory file system extending NOVA with snapshots and corruption protection.

Related Observatory article: NOVA-Fortis on hesela.com

Snapshot creation delays write faults on protected DAX pages until all mapped pages are read-only; application recovery may still be needed. [1]

This is distinct from the original NOVA atomic-mmap interface. [2]

Relations

related
NOVA file system, Direct Access, Persistent memory, Storage snapshot

Limitations

  • A local snapshot is not an independent backup; writable DAX pages remain an integrity-protection exception. [1]

Citations

  1. Xu et al. NOVA-Fortis: A Fault-Tolerant Non-Volatile Main Memory File System. SOSP 2017, sections 3.1-3.4 and 4.3. DOI: 10.1145/3132747.3132761. (accessed 2026-11-14)
  2. Jian Xu and Steven Swanson. NOVA: A Log-structured File System for Hybrid Volatile/Non-volatile Main Memories. FAST 2016, section 4.5. (accessed 2026-11-14)

Further reading

  1. Hesela: snapshot capture ordering, with an exhaustive teaching model. (accessed 2026-11-14)
Sources & caveats
  • Historical paper synthesis; no prototype execution, hardware fault injection or benchmark reproduction.

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Hesela team. NOVA-Fortis. Hesela. 2026-11-14. https://hesela.dev/terms/nova-fortis/