https://zerocoding.online/tags/redis/ZeroCodingHugo 0.165.0 & FixIt v1.0.0-alpha.2-mtmrzvotzh-CNhi@zerocoding.online (ZeroCoding)hi@zerocoding.online (ZeroCoding)Sun, 12 Jul 2026 00:00:00 +0800https://zerocoding.online/posts/redis-ha/Sun, 12 Jul 2026 00:00:00 +0800hi@zerocoding.online (ZeroCoding)https://zerocoding.online/posts/redis-ha/后端<p>Redis 的高可用，最常用的两条路是哨兵（Sentinel）和集群（Cluster）。选型之前，先想清楚自己的真实需求。</p> <h2 class="heading-element" id="哨兵sentinel"><span>哨兵（Sentinel）</span> <a href="#%e5%93%a8%e5%85%b5sentinel" class="heading-mark"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a> </h2><p>主从 + 哨兵监控，主挂自动切换。<strong>适合数据量不大、但对可用性有要求的场景</strong>。优点是简单、兼容性好，缺点是数据集中在一台主节点上，受内存上限制约。</p>