I’ve spent years designing lossless Ethernet fabrics for latency-sensitive workloads. Here’s why DCBX and RoCE are the unsung backbone of everything from high-frequency trading to training billion-parameter models across GPU clusters.
Quick reference guide for GnuPG commands including key generation, encryption, decryption, signing, and advanced security features.
Series: Learn Datacenter Networking on Your Laptop Part 1 ← You are here — GNS3 foundation, virtual networking mental model, bridges, taps, Linux networking across distros Part 2: VLANs, Bonding, and Network Segregation — VLANs, NIC bonding modes, LACP, bridge isolation Part 3: iPerf3, Fiber, and Juniper — Testing Your Datacenter Network Like a Pro I’ve been managing datacenter networks for a few years now. Not hyperscaler stuff — the kind where you have real switching infrastructure, multiple VLANs screaming across bonded NICs, and the constant background anxiety of wondering which unlabeled cable goes to production storage. ...
System Role: A high-availability Raspberry Pi 4 hosting a redundant RAID 1 storage array, acting as a transparent router for a LAN subnet, enforcing DNS filtering via AdGuard Home, and serving a Nextcloud instance externally via Cloudflare Tunnels. Host: Raspberry Pi 4 Model B (4GB RAM) Hostname: pi03 OS: Debian 12 (Bookworm) Functions: Multi-WAN Router, AdGuard Home DNS Filter, Nextcloud Storage (RAID 1), Cloudflare Tunnel. Date: November 2025 System Architecture & Network Design This system operates as a transparent router for a LAN subnet while hosting secure personal cloud services accessible from the internet. ...
Learn how to create, manage, and tune virtual machines with NUMA awareness using QEMU, KVM, and libvirt on Fedora and Ubuntu. Includes examples for NUMA topology, CPU pinning, hugepages, and bridge networking.