https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/Recent content in 应用场景 on Elastic CodeHugo -- gohugo.iozh-cn© 2026 Elastic Codehttps://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E5%88%86%E5%B8%83%E5%BC%8F%E7%BC%93%E5%AD%98/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E5%88%86%E5%B8%83%E5%BC%8F%E7%BC%93%E5%AD%98/https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E5%88%86%E5%B8%83%E5%BC%8F%E9%94%81/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E5%88%86%E5%B8%83%E5%BC%8F%E9%94%81/<h2 class="relative group">特性 <div id="特性" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e7%89%b9%e6%80%a7" aria-label="锚点">#</a> </span> </h2> <ul> <li>互斥性： 锁的目的是获取资源的使用权，因此只能一个竞争者持有锁</li> <li>安全性： 一个竞争者持有锁期间，若因为意外情况未能及时释放锁，也有兜底策略释放锁，保证其他的竞争者可以获得锁</li> <li>对称性： 同一个锁的枷锁和解锁必须是同一个竞争者， 不能把其他竞争者的锁给释放掉了</li> <li>可靠性： 需要一定的异常处理能力，容灾能力</li> </ul> <h2 class="relative group">实现 <div id="实现" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e5%ae%9e%e7%8e%b0" aria-label="锚点">#</a> </span> </h2> <div class="highlight-wrapper"><div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>set key value NX PX expire </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span>// key 为锁标识 </span></span><span style="display:flex;"><span>// value 为持锁者标识，只能持有者操作锁，非持有者不可操作，保证了**对称性** </span></span><span style="display:flex;"><span>// NX 存在则不操作，即只有第一个人操作成功，后来者操作会失败，保证了**互斥性** </span></span><span style="display:flex;"><span>// expire 设置过期时间，即使意外情况没有释放锁，也会因过期自动释放锁，保证了**安全性**</span></span></code></pre></div></div> <p>若业务逻辑执行时间超过锁的过期时间，可以考虑<strong>锁续期</strong></p>https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/<ol> <li>Lpush + Rpop / Rpush + Lpop</li> <li>避免轮询等，使用 Brpop，Blpop 阻塞式获取</li> <li>发布订阅</li> <li>** Stream 实现高级消息队列**</li> </ol> <p><figure><img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="auto" alt="" width="1654" height="468" src="https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/static/Kx8Xbje9vo0Tdxx1uATccW4RnKb_hu_281b459cd0bc6334.png" srcset="https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/static/Kx8Xbje9vo0Tdxx1uATccW4RnKb_hu_281b459cd0bc6334.png 800w, https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/static/Kx8Xbje9vo0Tdxx1uATccW4RnKb_hu_1e438ce6c1623bab.png 1280w" sizes="(min-width: 768px) 50vw, 65vw" data-zoom-src="https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/static/Kx8Xbje9vo0Tdxx1uATccW4RnKb.png"></figure> </p> <p><figure><img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="auto" alt="" width="2244" height="1266" src="https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/static/OFUGbh2C6oAM53x4Tq4cNkU3nqh_hu_1278e74fca0c2094.png" srcset="https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/static/OFUGbh2C6oAM53x4Tq4cNkU3nqh_hu_1278e74fca0c2094.png 800w, https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/static/OFUGbh2C6oAM53x4Tq4cNkU3nqh_hu_13c86499cf3cc2aa.png 1280w" sizes="(min-width: 768px) 50vw, 65vw" data-zoom-src="https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/static/OFUGbh2C6oAM53x4Tq4cNkU3nqh.png"></figure> </p>https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E7%A7%92%E6%9D%80/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E7%A7%92%E6%9D%80/<p>某活动瞬时产生巨大的并发访问量</p> <h2 class="relative group">需要解决的问题 <div id="需要解决的问题" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e9%9c%80%e8%a6%81%e8%a7%a3%e5%86%b3%e7%9a%84%e9%97%ae%e9%a2%98" aria-label="锚点">#</a> </span> </h2> <ol> <li>大量的并发请求，服务器要能扛得住</li> <li>不能超卖</li> <li>避免少卖</li> <li>保证触达用户而非黄牛</li> </ol> <h2 class="relative group">如何高并发 <div id="如何高并发" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e5%a6%82%e4%bd%95%e9%ab%98%e5%b9%b6%e5%8f%91" aria-label="锚点">#</a> </span> </h2> <p>将库存存储在 redis 中，通过 redis 扣减库存，这样高并发的请求打在 redis 上，并通过消息队列异步写库</p>https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E9%99%90%E6%B5%81/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E9%AB%98%E7%BA%A7/%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF/%E9%99%90%E6%B5%81/<h2 class="relative group">计数器算法 <div id="计数器算法" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e8%ae%a1%e6%95%b0%e5%99%a8%e7%ae%97%e6%b3%95" aria-label="锚点">#</a> </span> </h2> <h2 class="relative group">滑动窗口算法 <div id="滑动窗口算法" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e6%bb%91%e5%8a%a8%e7%aa%97%e5%8f%a3%e7%ae%97%e6%b3%95" aria-label="锚点">#</a> </span> </h2> <h2 class="relative group">漏桶算法 <div id="漏桶算法" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e6%bc%8f%e6%a1%b6%e7%ae%97%e6%b3%95" aria-label="锚点">#</a> </span> </h2> <h2 class="relative group">令牌桶算法 <div id="令牌桶算法" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#%e4%bb%a4%e7%89%8c%e6%a1%b6%e7%ae%97%e6%b3%95" aria-label="锚点">#</a> </span> </h2>