Modal 如何实现真正的无服务器 GPU
Modal 官方工程博客详解其无服务器 GPU 方案,通过云缓冲、自定义文件系统 ImageFS、CPU 检查点恢复和 CUDA 检查点恢复四项优化,把 AI 推理服务副本的启动时间从约 2000 秒缩短到 50 秒,提速 40 倍。其中 GPU 内存快照让 vLLM 或 SGLang 服务约 1 GiB 模型(Qwen 3 0.6B bf16)的冷启动典型提速 4-10 倍,Reducto 的冷启动从约 70 秒降到约 12 秒。作者称该技术栈已在数千万个副本规模上运行,过去三个月有数百家组织使用 CPU 和 GPU 快照。

raw algorithmic operation requirements by aggregate arithmetic bandwidth. This is catnip for engineers. It’s also especially critical for “hero run” large-scale training, so it draws a lot of investment and attention, e.g. recently as everyone dunked on xAI’s 10% MFU. But at the other end of the stack, there’s a more basic form of utilization that wrecks the relationship between achieved output and allocated capacity for inference workloads, GPU Allocation Utilization: GPU Allocation Utilizatio
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