parity-declustering · shipping · also declustered parity

Parity declustering

Parity declustering places parity groups across a larger device pool to distribute reconstruction work.

Related Observatory article: Parity declustering on hesela.com

Stripe width and placement scope are separate parameters; lower peak survivor load does not by itself establish shorter repair time.

Relations

related

raid-5, distributed-spare, repair-read-amplification, raid-rebuild

Citations

1. Mark Holland and Garth A. Gibson. Parity Declustering for Continuous Operation in Redundant Disk Arrays. ASPLOS 1992, pp. 23-35; sections 2, 4-8. (accessed 2026-10-13)
2. Parity declustering: less load per disk, not fewer reads (accessed 2026-10-13)

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