Why it matters

Full FT vs PEFT shapes strategy. Understanding shapes design.

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The architecture

Full FT: all params.

PEFT: small subset.

Trade quality + storage + inference overhead.

Full FT vs PEFT trade-offsFull FThighest qualityPEFTcheap + swappableChooseper use caseMulti-tenant serving favors PEFT (LoRA adapters); domain adapt full FT sometimes
Full FT vs PEFT.
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How it works end to end

Full FT: max quality; huge storage.

PEFT: 10-100x less storage; deployable per user.

QLoRA closes cost gap.