Miguel Ángel Pastor linking Zalando’s engineering post on client-side load balancing at a million requests...

What it is: Miguel Ángel Pastor linking Zalando’s engineering post on client-side load balancing at a million requests per second

Gist: argues high-fanout internal traffic benefited from moving load balancing into the client process to preserve cache locality, improve debuggability, and avoid shared-ingress distortions; highlights safety work like bounded-load routing and rollout fade-in

Newsletter angle: own the routing decision in-process when cache-sensitive fanout paths make shared infra the bottleneck

Retrieval note: extracted cleanly via FXTwitter API; card points to the Zalando engineering article

Note: overlaps with the same Zalando piece already logged earlier via Werner Vogels on 2026-07-02, but this direct share is now recorded too