Big Data Technology & Architecture

Feb 22, 2020 · Big Data

Understanding Flink's Asynchronous Barrier Snapshot (ABS) Algorithm for Checkpointing

This article explains how Apache Flink implements fault‑tolerant checkpointing using the Asynchronous Barrier Snapshot (ABS) algorithm, a localized version of the Chandy‑Lamport distributed snapshot, covering barriers, snapshot alignment, exactly‑once versus at‑least‑once semantics, and handling of cyclic dataflow graphs.