The Storage Wall: ZFS vs. Ceph vs. NVMe-oF for AI Training Clusters
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…