What is KV cache in LLM inference?
The key-value cache stores attention state computed for tokens already processed. Reusing it can avoid repeating prompt work, while moving it between serving nodes adds network and coordination costs.
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Why LLM Serving Teams Are Turning KV Cache Transfer Into a First-Class Design ChoiceTwo new vLLM transfer techniques target first-token latency by overlapping movement and reusing multi-turn context. See where each helps and what it costs.
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