What Are Data Center Tiers? Tier 1–4 Explained
What defines a data center Tier? A clear guide to the Uptime Institute's Tier 1–4 classification, uptime and annual downtime, redundancy concepts like N+1 and 2N, and which tier AI data centers actually need.
Nginx Ingress to Cilium: Migration Retrospective
We migrated a production Kubernetes cluster's CNI from flannel to Cilium after Ingress-NGINX reached end-of-life. Here are the five issues that surfaced over ten days after removing kube-proxy — SNI, timeouts, NodePort, monitoring — and the lessons learned.
GPU Chargeback: A Practical Build Guide
How do you fairly allocate shared GPU costs across teams? A FinOps guide to the difference between chargeback and showback, what to measure, and the practical steps to build a GPU cost allocation system.
On-Prem vs Cloud GPU: How to Choose
Build GPU infrastructure on-prem or rent it in the cloud? Compare the two on TCO, data security, scalability, and utilization — plus when a hybrid strategy makes the most sense.
