anti-entropy-repair · shipping · also Replica anti-entropy

Anti-entropy repair

Anti-entropy repair compares replica state over a selected scope and synchronizes differences to reduce divergence.

Related Observatory article: Anti-entropy repair on hesela.com

Cassandra 5.0.0 compares common token ranges using Merkle trees and transfers differing data. Incremental repair skips data already marked repaired; full repair revisits the selected scope. [1]

Relations

related

read-repair, hinted-handoff, merkle-tree, lsm-tombstone

Limitations

• One completed job need not cover the whole cluster, and incremental repair is not a complete later-corruption check. [1]

Citations

1. Apache Cassandra 5.0.0: Repair (accessed 2026-10-13)
2. Replica repair: what has actually converged? (accessed 2026-10-13)

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