Why it matters

ZeRO-Infinity extends limits. Understanding shapes extreme training.

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The architecture

Tiered memory: GPU hot, CPU warm, NVMe cold.

Prefetch + overlap.

ZeRO-Infinity tiersGPU tierhotCPU RAMwarmNVMecoldTrillion-param training possible; but often slower than smaller model on fewer resources
ZeRO-Infinity.
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How it works end to end

Prefetch upcoming params.

Overlap with compute.

Requires fast NVMe.