{
  "slug": "anti-entropy-repair",
  "term": "Anti-entropy repair",
  "aliases": [
    "Replica anti-entropy"
  ],
  "definition": "Anti-entropy repair compares replica state over a selected scope and synchronizes differences to reduce divergence.",
  "note": "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. [repair]",
  "status": "shipping",
  "advantages": [],
  "limitations": [
    {
      "text": "One completed job need not cover the whole cluster, and incremental repair is not a complete later-corruption check.",
      "citationIds": [
        "repair"
      ]
    }
  ],
  "related": [
    "read-repair",
    "hinted-handoff",
    "merkle-tree",
    "lsm-tombstone"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-13",
  "citations": [
    {
      "id": "repair",
      "title": "Apache Cassandra 5.0.0: Repair",
      "url": "https://raw.githubusercontent.com/apache/cassandra/cassandra-5.0.0/doc/modules/cassandra/pages/managing/operating/repair.adoc",
      "accessed": "2026-10-13"
    },
    {
      "id": "hesela-repair",
      "title": "Replica repair: what has actually converged?",
      "url": "https://hesela.com/analyses/replica-repair-coverage/",
      "accessed": "2026-10-13"
    }
  ]
}