11cm.fun

FIELD NOTES

Small, practical notes for building dependable systems.

Short references on software maintenance, networking fundamentals, and operational habits.

Prefer boring recovery procedures

A recovery path should use fewer moving parts than the system it restores. Keep the instructions short, test them periodically, and store a copy away from the primary machine.

Measure before changing network settings

Record latency, loss, DNS behavior, and the exact route before tuning. A small baseline makes it easier to distinguish an improvement from a temporary change in conditions.

Configuration is part of the product

Version configuration alongside the software, validate it before activation, and keep the last known-good release available for rollback.