Topic

#flink

Apache Flink🟡Intermediate

Sep 1, 20268 min read

Flink vs Spark Structured Streaming: State, Latency, and the Team You Actually Have

A production comparison of Flink and Spark Structured Streaming: how each one holds state, what their latency floors really are, and why the honest deciding factor is usually your existing batch stack.

flink
spark
streaming

Illustrated overview of Flink Event Time and Watermarks: Checkpoints, Savepoints, and the Sink Key You Still Need

Apache Flink🟢Beginner

Aug 27, 20266 min read

Flink Event Time and Watermarks: Checkpoints, Savepoints, and the Sink Key You Still Need

Processing time lies after a restart. Watermarks drop late events on purpose. Checkpoints recover; savepoints migrate. Exactly-once to Kafka does not upsert Postgres.

flink
streaming