Apache Spark vs Apache Flink: which should you use?
Summary
Spark Real-Time Mode matched or beat Apache Flink on p99 latency for stateless, aggregation, and join workloads in recent Databricks benchmarks. While Flink remains a fit for specialized needs like very large keyed state or complex event processing, Spark stands as the default choice to unify batch, SQL, ML, and millisecond-latency streaming in a single engine.
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