Article: High Availability Is Not Resilience: Why Cloud Systems Fail When It Matters Most
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…
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Meta’s ZGateway Cuts ZippyDB Connections 19x While Handling 1B+ Operations per Second
Meta has introduced ZGateway, a stateless proxy for ZippyDB that centralizes connection management, traffic routing, caching, load balancing, and ad…
Uber Redesigns M3DB Sharding with Subclusters to Limit Failure Impact
Uber has redesigned shard placement in M3DB with fixed size subclusters to limit the impact of node failures, maintenance, and cluster scaling. The…
Presentation: How To Run on Three Clouds at Once, and When Not To
Ross McFarlane and Kevin Holditch discuss Form3's evolution from a single-cloud setup to a triple active multi-cloud architecture. They share key en…
Cloudflare Introduces Meerkat for Strongly Consistent Global Coordination
Cloudflare recently introduced Meerkat, an internal globally consistent control-plane service based on the QuePaxa consensus algorithm. Unlike Raft,…
DoorDash Uses Envoy and Valkey for a 1.5M RPS Proxy Cache with 99.99999% Availability
DoorDash has developed Entity Cache, a transparent proxy caching platform built on Envoy and Valkey to reduce redundant service-to-service requests…
Article: Trade-Offs in Multi-Region Architectures: Latency vs. Cost
Adding cloud regions changes latency and cost in ways simple math can't capture. This article presents a framework from multiple launches: decompose…
AWS Adds Multi-Region Replication to Amazon Cognito Identity Service
AWS recently introduced Amazon Cognito multi-region replication, which automatically replicates user identities and user pool configurations from a…
How LinkedIn Identified a Kernel Lock Contention Issue Causing Recurring System Freezes
When LinkedIn engineers encountered short-lived, recurring outages where the database powering their user feed became unavailable and then recover w…