Primary sourceshao__meng
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Perplexity 重写 AI 搜索存储层，用自研系统 CobbleDB 替代 DynamoDB
Perplexity 用自研的「CobbleDB + Pillar + Lorry」三件套替换了 DynamoDB，将批量读延迟降低约 5 倍、成本降低至少 20%。新系统将爬取、清洗、嵌入等离线处理与在线查询分离，解决了旧架构中大规模重处理对在线服务的干扰问题。
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Perplexity 用 2 名工程师和数百个 AI 编码 agent 在两个月内建成了 4 万行 Rust 的核心库，这种用 AI 工具链快速自研基础设施的模式很值得一看。
3 sources78° AI heatLast updated 2026/9/16 02:00:45
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