https://n.cqs.es/tags/%E5%88%86%E5%B8%83%E5%BC%8F%E6%96%87%E4%BB%B6%E7%B3%BB%E7%BB%9F/Recent content in 分布式文件系统 on Costa的生活技术实验室Hugozh-hansWed, 22 Jul 2026 16:55:00 +0800https://n.cqs.es/posts/2026/2026-2-fletch-switch-metadata-cache/Wed, 22 Jul 2026 16:55:00 +0800https://n.cqs.es/posts/2026/2026-2-fletch-switch-metadata-cache/<h2 class="group head-tag" id="-论文解读">📄 论文解读<a data-title-of-head class="group-hover:after:content-['__#'] no-underline hover:text-[--hs-text-color-hover]" href="#-%e8%ae%ba%e6%96%87%e8%a7%a3%e8%af%bb"></a></h2><p><strong>Fletch: File-System Metadata Caching in Programmable Switches</strong> Qingxiu Liu, Jiazhen Cai, Siyuan Sheng, Yuhui Chen, Lu Tang, Zhirong Shen, Patrick P. C. Lee arXiv:2510.08351v3 · 2026 年 5 月 · 17 页 GitHub: <a href="https://github.com/adslabcuhk/fletch" target="_blank" rel="noopener noreferrer" >https://github.com/adslabcuhk/fletch</a > </p> <h2 class="group head-tag" id="一句话核心">一句话核心<a data-title-of-head class="group-hover:after:content-['__#'] no-underline hover:text-[--hs-text-color-hover]" href="#%e4%b8%80%e5%8f%a5%e8%af%9d%e6%a0%b8%e5%bf%83"></a></h2><p>把 HDFS 的元数据缓存从客户端搬到可编程交换机数据平面里，用 P4 写到 Tofino， 直接在网络关键路径上吸收读请求，把一致性维护从 O(N) 降到 O(1)，同时用 &ldquo;in-switch 集中化&quot;天然吸收热点请求、缓解后端负载倾斜。</p>