This is where weekend experiments live: router firmware, energy monitoring, DNS sampling, fan curves. Whenever a question can be settled with data, the method and the samples go here, complementing the long-form posts on the main blog.
Plug-level power sampling since Sep 2025; a nearest-centroid classifier now covers nine appliances and flags anomalies before hardware fails.
420k+ latency samples since Mar 2025; conclusions are p95-driven, and retries turned out to matter more than medians.
PWM-vs-RPM curves for a dozen common fan models, measured with a tachometer, since Jun 2026.
| Project | One-line conclusion | Data volume |
|---|---|---|
| Wireless channel selection | Fixed 1/6/11 isn't always optimal on congested 2.4GHz; a weekly re-scan beats a fixed choice. | 28 days |
| NAS sleep strategy | Two sleep cycles/day saved 41 kWh/year vs always-on; head-wear impact still under observation. | 90 days |
| Used enterprise SSDs | Pulled datacenter drives: negligible wear for home workloads, +4W idle cost. | 1 year |
This service is one of several running on the 5457090.xyz domain. The rest of the fleet:
| Domain | Service | What it does |
|---|---|---|
| www.5457090.xyz | Main blog | Alvin's Notebook — long-form write-ups about this fleet |
| cloud.5457090.xyz | CloudHub | Private file sync and machine backup landing zone |
| cdn.5457090.xyz | StaticHub | Static asset cache for every site on the network |
| api.5457090.xyz | API gateway | Shared JSON API facade for the network's services |
| mail.5457090.xyz | MailCorner | Self-hosted mail for the 5457090.xyz domain |
| git.5457090.xyz | GitNest | Self-hosted git hosting, read-only public clones |
| dev.5457090.xyz | DevTools | Local-first developer tools, nothing leaves the network |