Flink vs Spark aka Streaming First vs Batch First
The tension at the core of the Flink vs Spark debate is philosophical. While both tools answer the chaos of endlessly restless data with distributed compute, they do so with dramatically different assumptions about time, state, and what “processing” even means. Flink’s worldview is famously stream-native: it treats batch as a bounded stream, and its DataStream API can run in either STREAMING or BATCH execution mode, with the same program semantics over bounded input (with differences in when results are emitted). In other words, Flink’s “batch” story is built by narrowing streaming, not by bolting streaming onto batch. That orientation shows up everywhere: event time is a first-class concept, state is not an embarrassment, and long-running jobs are normal, not … Read more