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Rollback

As explained in Architecting an Apache Iceberg Lakehouse

An operation that makes an earlier table snapshot the current state without necessarily deleting files introduced by later snapshots.

Rollback makes an earlier Apache Iceberg table snapshot current by moving the table’s metadata pointer. It reverses the table state for future queries and writes without deleting files introduced by later snapshots. section 11.3.4

Use rollback as part of an incident-recovery workflow:

  • Inspect historical snapshots with time travel, using a snapshot ID or timestamp, to validate the intended recovery point and diagnose the failure. section 11.3.4
  • Apply the rollback_to_snapshot procedure to update the current metadata pointer to the selected snapshot. section 11.3.4
  • Coordinate the operation through the catalog and query engine, whose atomic metadata commits preserve consistency across concurrent operations. section 7.1.2

Rollback differs from time travel: time travel reads an earlier state without changing production, whereas rollback changes the state seen by subsequent reads and writes. Snapshot retention and file cleanup therefore remain separate operational concerns. section 11.3.4 section 4.3.3

How Architecting an Apache Iceberg Lakehouse covers it

How deep it goes
Explains immutable snapshots, metadata-pointer movement, time-travel contrast, and catalog coordination, but not a complete cleanup procedure.
Examples
Uses snapshot IDs or timestamps for historical queries and the rollback_to_snapshot procedure for recovery.
What it assumes
Assumes familiarity with Iceberg tables, metadata snapshots, catalogs, and query engines while distinguishing time travel from rollback.
What you can do after
Diagnose incidents with historical snapshots and restore a previous table state for subsequent queries and writes.
How it connects
Connects rollback with Apache Iceberg snapshots, time travel, metadata catalogs, schema evolution, atomic commits, and data recovery.

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This explainer was generated by Manning's knowledge graph from the text of Architecting an Apache Iceberg Lakehouse. The section links point to the parts of the book it draws on.