Luxerion
Practical engineering writing for people who keep systems alive.
HTTP/3 and QUIC: What Changed for Operators
September 12, 2026
QUIC moves the transport into userspace and encrypts most of the header, which is lovely for privacy and mildly annoying for anyone debugging with tcpdump. Flow control and congestion data that used to be visible on the wire now live behind the TLS key log.
Operationally, the wins are real: connection migration means a phone walking from Wi-Fi to LTE keeps its downloads going instead of restarting them. For latency-sensitive APIs, the zero round-trip resumption matters more than any head-of-line blocking debate.
Understanding TLS 1.3 Session Resumption
August 6, 2026
Shortening the standard handshake to a solitary round trip was an achievement, but session resumption delivers the true speed advantage for returning traffic. Transmitting data right away via pre-shared keys spares high-latency cellular connections the drag of multi-step cryptographic exchanges.…
Why Edge Caching Still Matters in 2026
May 10, 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…
Zero-Downtime Deployments Without the Drama
May 17, 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.…
The Hidden Cost of Chatty Microservices
August 3, 2026
Refactoring centralized code into independent microservices trades code complexity for network unpredictability. Workflows that previously triggered simple internal methods suddenly require coordinated remote requests, each introducing separate latency budgets, retry loops, and partition hazards.…
More reading
- Practical Notes on Postgres Connection Pooling — Data, September 5, 2026
- A Field Guide to Graceful Degradation — Engineering, September 6, 2026
- Cache Invalidation Patterns That Survive Traffic — Data, June 28, 2026
About us
Founded by former SREs and network engineers, our editorial desk focuses on the practical side of operating distributed services - less hype, more packet captures.