H100

AI Infrastructure | Networking

GPU Fabric Physics 2026: Why 800G Isn’t Enough for 100k-GPU Training
ByR M 02/09/202604/19/2026

The NCCL Timeout Nightmare GPU fabric physics is where $50 million clusters go to die. You wired up 800G OSFP optics, fired up your 100,000-GPU cluster for the Big Run — and six hours in, the loss curve flatlines. Logs start screaming: NCCL_WATCHDOG_TIMEOUT. It’s not a bad GPU. It’s not a driver crash. Honestly, it’s…

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AI Infrastructure | Storage

The Storage Wall: ZFS vs. Ceph vs. NVMe-oF for AI Training Clusters
ByR M 02/05/202603/26/2026

The Real Problem: The “Checkpoint Stall” A 16x H100 cluster costs roughly $40/hour to sit idle. When your AI training storage can’t ingest a 2.8 TB Adam optimizer checkpoint fast enough, your GPUs wait — and your training run stalls. Most AI clusters fail not because the GPUs are slow, but because the storage collapses…

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AI Infrastructure Architecture

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