staggered-reconstruction · research · also staggered rebuild

Staggered reconstruction

Staggered reconstruction rebuilds missing data in successive source-disk groups, limiting simultaneous disk activity.

Pergamum folds each source region into a disk-resident partial result. With m sources processed individually, each target location is written m times and reread m - 1 times. This is a reconstruction schedule, not a change to the erasure code. [1]

Relations

related

Massive array of idle disks, Power-aware coding

Limitations

• Limiting simultaneously active disks does not by itself establish lower total energy or faster recovery. [1]

Citations

1. Storer, Greenan, Miller and Voruganti. Pergamum. FAST 2008, section 4.3.2. (accessed 2026-11-09)

Further reading

2. Hesela: explicit batched-XOR accounting, assumptions and executable tests (accessed 2026-11-09)

JSON: /data/terms/staggered-reconstruction.json