PREFIX.DIGESTOrder-insensitive checksum of a prefix's rows for migration verification.
| 構文 | PREFIX.DIGEST prefix |
| グループ | migration |
| 引数の数 | 2 |
| 導入バージョン | 3.0.0 |
| フラグ | readonly, extension |
| 計算量 | O(keys on the shard) to walk plus O(sum of row sizes) to digest, on every shard. Per-row digests XOR together, so the result is order-insensitive and safe across shard counts |
| Redis 互換性 | kevy-only: nearest is DEBUG DIGEST — comparable in kind (Redis also XORs per-key digests), but Redis's is whole-DB and lives behind DEBUG, while ours is per-prefix (the unit a migration actually cares about) and is a supported verb |