diskseen · research

DiskSeen

DiskSeen is a research prefetching scheme that uses logical block layout and access history to predict disk reads.

It supplements file-level prefetching, including cross-file and metadata access opportunities. Logical block numbers are not a map of exact physical geometry. [1]

Demand accesses update its history; speculative fetches alone do not count as demand. [1]

Relations

related
DULO, Table-based Prefetching (TaP), Prefetch wastage, readahead (Linux syscall)

Limitations

  • The prototype lacks adaptive prefetch throttling and can suffer from stale predictions and excessive history-table memory. [1]

Citations

  1. Ding et al. DiskSeen: Exploiting Disk Layout and Access History to Enhance I/O Prefetch. USENIX ATC 2007, pp. 261-274; sections 2-4. (accessed 2026-11-09)

Further reading

  1. Hesela: layout-aware prefetching and the cost of a wrong prediction (accessed 2026-11-09)
Sources & caveats
  • Historical single-HDD Linux 2.6.11/ext3 prototype; no modern SSD performance inference or replication.

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Cite this page
Hesela team. DiskSeen. Hesela. 2026-11-09. https://hesela.dev/terms/diskseen/