Vexarion
Field notes on building and running reliable internet services.
HTTP/3 and QUIC: What Changed for Operators
June 1, 2026
Implementing transport logic inside user space alongside encrypted protocol framing gives QUIC superior privacy while frustrating network operators relying on packet sniffers. Diagnostic data such as congestion state and window allocations are obscured behind cryptographic boundaries.
Practical engineering improvements justify the operational adjustment: handover between cellular and local Wi-Fi happens without resetting active transfers. When operating tight API services, instant connection resumption provides much more noticeable responsiveness than theoretical discussions about head-of-line delays.
Reading Latency Percentiles Without Fooling Yourself
June 29, 2026
Averages conceal what percentiles reveal: the request mix's tail. A service averaging fifty milliseconds can still be sending one in twenty users through a two-second odyssey, and those users - the ones hitting the cold paths, the expired sessions, the overloaded shard - are the ones filing the tick…
Multi-Region Failover Planning
July 19, 2026
Geographic disaster recovery success is determined long before an outage strikes. Establishing acceptable replication lag and designating operational authority to execute failover appear to be policy questions, but they dictate core technical parameters ranging from database clustering to telemetry …
Zero-Downtime Deployments Without the Drama
July 13, 2026
The folklore version of zero-downtime deployment involves blue-green environments and instant cutovers. The operational version is mostly about boring details: health checks that test real work, connection draining that actually finishes, and database migrations that respect the running version.…
Why Edge Caching Still Matters in 2026
July 22, 2026
Industry commentary regularly claims that fast compute and cheap bandwidth render perimeter caches unnecessary. High-percentile latency measurements prove otherwise every single week. When a client in Sao Paulo requests data from an origin in Frankfurt, physics imposes an unavoidable transit penalty…
More reading
- When to Choose a Queue Over a Request — Engineering, June 14, 2026
- The Hidden Cost of Chatty Microservices — Engineering, August 10, 2026
- A Field Guide to Graceful Degradation — Engineering, August 6, 2026
About us
We are a small team of infrastructure engineers and technical writers. We publish what we learn running production systems: incident retrospectives, protocol deep-dives and tooling notes.