L2 Systems

Notes on networking, hosting and reliability

Planning capacity for small teams

Infrastructure

A short checklist for sizing bandwidth, storage and backups before a project goes live, and the metrics worth watching during the first month.

Why latency matters more than throughput

Networking

Most interactive workloads are limited by round trips, not by peak speed. We look at routing, peering and what to measure from a user's point of view.

Backups you can actually restore

Operations

A backup is only useful if it restores. A simple monthly drill, what to record, and how to keep the process boring.