Article: High Availability is Not Resilience: Why Cloud Systems Fail When it Matters Most

Alexey Golev — Thu, 01 Oct 2026 09:00:00 GMT

A routine TLS 1.3 upgrade silently broke Route 53 health checks, causing a CDN to stop routing traffic to a healthy region while internal dashboards showed nothing wrong. This article examines why HA and resilience are different problems, how control-plane dependencies create invisible failure modes, and why recovery capability erodes without explicit ownership.

By Alexey Golev

Meta’s ZGateway Cuts ZippyDB Connections 19x While Handling 1B+ Operations per Second

Leela Kumili — Mon, 28 Sep 2026 13:55:00 GMT

Meta has introduced ZGateway, a stateless proxy for ZippyDB that centralizes connection management, traffic routing, caching, load balancing, and admission control. The gateway handles more than 1 billion operations per second and about 40% of ZippyDB traffic, while Meta’s model estimates a 19x reduction in persistent connections.

By Leela Kumili

InfoQ - Availability

Article: High Availability is Not Resilience: Why Cloud Systems Fail When it Matters Most

Meta’s ZGateway Cuts ZippyDB Connections 19x While Handling 1B+ Operations per Second