Infrastructure

Three and a Half Weeks, 689M Tokens, No Meter featured image

Three and a Half Weeks, 689M Tokens, No Meter

689M tokens. 25 days. ~$40 electricity. The math, the caveats, and what changed when the meter stopped existing.

Derek Armstrong - Payments Engineer · AI · Infrastructure
Derek Armstrong
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Qwen3.8 27B on Dual RTX 3090s: A vLLM Field Report featured image

Qwen3.8 27B on Dual RTX 3090s: A vLLM Field Report

Three days into making Qwen3.8 27B my daily local coding driver on dual 3090s — the hybrid linear-attention architecture, an OOM that masqueraded as a backend error, and what the …

Derek Armstrong - Payments Engineer · AI · Infrastructure
Derek Armstrong
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Highly Available AI Inference Cluster featured image

Highly Available AI Inference Cluster

What this proves: Resilience — enterprise-grade AI infrastructure at a single operator's desk. A custom routing plane in front of a three-server GPU fleet that switches models and …

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Running Qwen3.6 27B Locally on Dual RTX 3090s with vLLM v0.19 featured image

Running Qwen3.6 27B Locally on Dual RTX 3090s with vLLM v0.19

How I went from a blank Docker template to 116+ tok/s with speculative decoding, FlashInfer, and a 160k context window on dual 3090s.

Derek Armstrong - Payments Engineer · AI · Infrastructure
Derek Armstrong
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The Proxmox Utility Toolkit: Stop Cloning That VM by Hand featured image

The Proxmox Utility Toolkit: Stop Cloning That VM by Hand

A tour of my open-source Proxmox utility toolkit — scripts, docs, and learning paths for homelabbers and enterprise engineers who are tired of repeating themselves.

Derek Armstrong - Payments Engineer · AI · Infrastructure
Derek Armstrong
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Nagios: A 10-Year Retrospective on Infrastructure Monitoring featured image

Nagios: A 10-Year Retrospective on Infrastructure Monitoring

A decade-long retrospective on implementing Nagios for enterprise infrastructure monitoring, from homelab validation to production deployment at scale.

Derek Armstrong - Payments Engineer · AI · Infrastructure
Derek Armstrong
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Self-Hosted AI Inference Cluster featured image

Self-Hosted AI Inference Cluster

I build and operate AI infrastructure right now, today.

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Upgrading from RHEL 7 to RHEL 8 featured image

Upgrading from RHEL 7 to RHEL 8

Insights on upgrading from rhel 7 to rhel 8.

Derek Armstrong - Payments Engineer · AI · Infrastructure
Derek Armstrong
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Comparing Docker.io and Snap Docker on Ubuntu featured image

Comparing Docker.io and Snap Docker on Ubuntu

Key differences between installing docker.io and snap docker on Ubuntu include file access permissions, affecting security and flexibility

Derek Armstrong - Payments Engineer · AI · Infrastructure
Derek Armstrong
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Self-Hosted Privacy-First Analytics featured image

Self-Hosted Privacy-First Analytics

Plausible Analytics deployed as a self-hosted alternative to Google Analytics in Podman containers behind Cloudflare tunnels.

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