/en/tags/distributed-systems/Recent content in Distributed Systems on Mi&Bee BlogHugo -- gohugo.ioen蓝宝石的傻话Sat, 16 May 2026 00:00:00 +0000/en/posts/telemetry/stream-metrics-three/Sat, 16 May 2026 00:00:00 +0000/en/posts/telemetry/stream-metrics-three/<h2 id="introduction">Introduction</h2> <p>In <a href="/en/posts/telemetry/stream-metrics-two/">the previous article</a>, we reviewed the three-year evolution of stream-metrics-route and mentioned that the &ldquo;dual hashmod scheduling&rdquo; is the core scheduling mechanism of the entire gateway. However, during continuous production operation, one fatal flaw of hashmod became increasingly obvious—<strong>every scaling operation triggers full data redistribution</strong>.</p> <p>This article documents the complete decision process of migrating from <code>hash % N</code> (hashmod) to <strong>Jump Consistent Hash</strong>: which candidate algorithms were evaluated, why Jump Hash was ultimately chosen, and the specific impact before and after migration.</p>