TLDR Tech / Data
Supermetal vs. Flink vs. Spark for Postgres-to-Iceberg CDC
Postgres-to-Iceberg CDC performance depends heavily on pipeline design, especially during the snapshot phase, not just on connector brand. In this sponsored benchmark, Supermetal's single-node advantage came from a faster CDC path, lower serialization overhead, and phase-aware sink behavior that treats snapshotting and live CDC differently. Flink and Debezium required more tuning and infrastructure. The broader lesson is to benchmark snapshot architecture, tuning knobs, and steady-state CDC separately.
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