storageclass memory

AI’s bottleneck has moved to I/O; this Bash-first playbook shows how to baseline with fio/iostat/smartctl, build NVMe-hot + HDD/object tiers via LVM cache and btrfs, accelerate ingest with NVMe/TCP, aria2, rclone, and S3, use MinIO/Ceph as a backbone, enforce integrity (checksums, scrubs, compression, snapshots), run a tiny benchmark harness, and prepare for CXL, DPUs, and computational storage.