Netflix is retiring its homegrown Flink autoscaler for Apache Flink's — and explains why
Netflix runs two Flink autoscalers today: a cluster-level tool built in-house years ago, and Apache Flink's Autoscaler, which it now wants as the only one. The old system saved 25–45% on CPU, but scaled whole clusters off container metrics and missed operator-level state, causing telemetry gaps. The post walks through what broke and how the open-source autoscaler fixes it. A rare, honest teardown of throwing away your own too-clever tooling.