Snapshot repair in a deduplication storage system

A method comprising:

• identifying, by a storage controller of a deduplication storage system, a corrupt data unit included in a first snapshot stored in a deduplication storage system;
• identifying, by the storage controller, a first manifest that references the corrupt data unit, wherein the first manifest records an ingest order of data units of the first snapshot into the deduplication storage system;
• identifying based on the first manifest, by the storage controller, a first container index that indexes the corrupt data unit;
• determining based on the first container index, by the storage controller, a set of candidate manifests;
• identifying in the set of candidate manifests, by the storage controller, a second manifest having a highest match score with respect to a first portion of the first manifest;
• determining, by the storage controller, whether the identified second manifest having the highest match score references the corrupt data unit;
• and
• in response to a determination that the identified second manifest having the highest match score does not reference the corrupt data unit, replacing in the first manifest, by the storage controller, a reference to a corrupt data unit with a reference to a non-corrupt data unit referenced in the identified second manifest.

A non-transitory machine-readable medium storing instructions that upon execution cause a processor to:

• identify a corrupt data unit included in a first snapshot stored in a deduplication storage system;
• identify a first manifest that references the corrupt data unit, where the first manifest records an ingest order of data units of the first snapshot into the deduplication storage system;
• identify, based on the first manifest, a first container index that indexes the corrupt data unit;
• determine, based on the first container index, a set of candidate manifests;
• identify, in the set of candidate manifests, a second manifest having a highest match score with respect to a first portion of the first manifest;
• and
• in response to a determination that the identified second manifest having the highest match score does not reference the corrupt data unit, replace, in the first manifest, a reference to a corrupt data unit with a reference to a non-corrupt data unit referenced in the identified second manifest.