https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/Recent content in 基础 on Elastic CodeHugo -- gohugo.iozh-cn© 2026 Elastic Codehttps://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/<h2 class="relative group">基本命令、常用操作 <div id="基本命令常用操作" 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%9f%ba%e6%9c%ac%e5%91%bd%e4%bb%a4%e5%b8%b8%e7%94%a8%e6%93%8d%e4%bd%9c" aria-label="锚点">#</a> </span> </h2> <p><figure><img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="auto" alt="" width="1348" height="1138" src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/static/UKytb9MrComOM7xArbwcVUVQnMb_hu_f7d5553dc73f3ebc.png" srcset="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/static/UKytb9MrComOM7xArbwcVUVQnMb_hu_f7d5553dc73f3ebc.png 800w, https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/static/UKytb9MrComOM7xArbwcVUVQnMb_hu_4218aef7bf566563.png 1280w" sizes="(min-width: 768px) 50vw, 65vw" data-zoom-src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/static/UKytb9MrComOM7xArbwcVUVQnMb.png"></figure> </p> <h2 class="relative group">对象编码的方式 <div id="对象编码的方式" 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%af%b9%e8%b1%a1%e7%bc%96%e7%a0%81%e7%9a%84%e6%96%b9%e5%bc%8f" aria-label="锚点">#</a> </span> </h2> <p><figure><img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="auto" alt="" width="1472" height="714" src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/static/A7ajbU73bo83hmxwsF9cYpN8nWb_hu_39511539fd368d96.png" srcset="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/static/A7ajbU73bo83hmxwsF9cYpN8nWb_hu_39511539fd368d96.png 800w, https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/static/A7ajbU73bo83hmxwsF9cYpN8nWb_hu_d2cdedad06128c02.png 1280w" sizes="(min-width: 768px) 50vw, 65vw" data-zoom-src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/hash/static/A7ajbU73bo83hmxwsF9cYpN8nWb.png"></figure> </p>https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/list/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/list/<h2 class="relative group">基本命令、常用操作 <div id="基本命令常用操作" 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%9f%ba%e6%9c%ac%e5%91%bd%e4%bb%a4%e5%b8%b8%e7%94%a8%e6%93%8d%e4%bd%9c" aria-label="锚点">#</a> </span> </h2> <p>Lpush Rpush</p> <p>Lpop Rpop lrem</p> <p>Lrange llen</p> <p>Del unlink</p> <h2 class="relative group">对象编码方式 <div id="对象编码方式" 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%af%b9%e8%b1%a1%e7%bc%96%e7%a0%81%e6%96%b9%e5%bc%8f" aria-label="锚点">#</a> </span> </h2> <p><figure><img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="auto" alt="" width="1246" height="690" src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/list/static/T3GNb8d1DocyaTxWHmtc55DVnTe_hu_1317580743275574.png" srcset="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/list/static/T3GNb8d1DocyaTxWHmtc55DVnTe_hu_1317580743275574.png 800w, https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/list/static/T3GNb8d1DocyaTxWHmtc55DVnTe.png 1280w" sizes="(min-width: 768px) 50vw, 65vw" data-zoom-src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/list/static/T3GNb8d1DocyaTxWHmtc55DVnTe.png"></figure> </p>https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/object-%E7%90%86%E8%A7%A3/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/object-%E7%90%86%E8%A7%A3/<p>Redis 的多种数据结构底层均为统一的 redis object 对象</p> <p>RedisObject 负责描述对象的元数据（如类型、编码方式、引用计数等）</p> <p>对于 string 类型，SDS 负责存储具体的字符串数据</p> <p>Object 命令 可查看某个键的元信息</p> <p>Object help</p> <p>redisObject 定义</p> <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-c" data-lang="c"><span style="display:flex;"><span><span style="color:#75715e">// redisObject 定义 </span></span></span><span style="display:flex;"><span><span style="color:#66d9ef">typedef</span> <span style="color:#66d9ef">struct</span> redisObject { </span></span><span style="display:flex;"><span> <span style="color:#66d9ef">unsigned</span> type:<span style="color:#ae81ff">4</span>; </span></span><span style="display:flex;"><span> <span style="color:#66d9ef">unsigned</span> encoding:<span style="color:#ae81ff">4</span>; </span></span><span style="display:flex;"><span> <span style="color:#66d9ef">unsigned</span> lru:LRU_BITS; <span style="color:#75715e">/* LRU time (relative to server.lruclock) or </span></span></span><span style="display:flex;"><span><span style="color:#75715e"> LFU data (least significant 8 bits frequency </span></span></span><span style="display:flex;"><span><span style="color:#75715e"> and most significant 16 bits access time). */</span> </span></span><span style="display:flex;"><span> <span style="color:#66d9ef">int</span> refcount; </span></span><span style="display:flex;"><span> <span style="color:#66d9ef">void</span> <span style="color:#f92672">*</span>ptr; </span></span><span style="display:flex;"><span>} robj;</span></span></code></pre></div></div> <p>Redis 对象常用几种类型</p>https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/set/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/set/<h2 class="relative group">基本命令、常用操作 <div id="基本命令常用操作" 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%9f%ba%e6%9c%ac%e5%91%bd%e4%bb%a4%e5%b8%b8%e7%94%a8%e6%93%8d%e4%bd%9c" aria-label="锚点">#</a> </span> </h2> <p>Sadd</p> <p>Smembers 查看所有成员</p> <p>Scard 元素个数</p> <p>Sscan 游标迭代查询 sscan key cursor match 1* count 10</p> <p>Sinter</p> <p>Sunion</p>https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/string/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/string/<h2 class="relative group">基本命令、常用操作 <div id="基本命令常用操作" 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%9f%ba%e6%9c%ac%e5%91%bd%e4%bb%a4%e5%b8%b8%e7%94%a8%e6%93%8d%e4%bd%9c" aria-label="锚点">#</a> </span> </h2> <p>Get</p> <p>Set</p> <p>Setex</p> <p>Setnx</p> <p>Mget</p> <p>Ulink 异步删除</p> <p>最大 512 M</p> <h2 class="relative group">对象编码的方式 <div id="对象编码的方式" 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%af%b9%e8%b1%a1%e7%bc%96%e7%a0%81%e7%9a%84%e6%96%b9%e5%bc%8f" aria-label="锚点">#</a> </span> </h2> <p><figure><img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="auto" alt="" width="1198" height="684" src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/string/static/TT8EbVLpTo14iOxa2VgcRP6invd_hu_6295964523925f37.png" srcset="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/string/static/TT8EbVLpTo14iOxa2VgcRP6invd_hu_6295964523925f37.png 800w, https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/string/static/TT8EbVLpTo14iOxa2VgcRP6invd.png 1280w" sizes="(min-width: 768px) 50vw, 65vw" data-zoom-src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/string/static/TT8EbVLpTo14iOxa2VgcRP6invd.png"></figure> </p>https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/<h2 class="relative group">基本命令、常用操作 <div id="基本命令常用操作" 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%9f%ba%e6%9c%ac%e5%91%bd%e4%bb%a4%e5%b8%b8%e7%94%a8%e6%93%8d%e4%bd%9c" aria-label="锚点">#</a> </span> </h2> <p><figure><img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="auto" alt="" width="1484" height="1174" src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/static/Poi8bU4URoQpPzx7zoAcQQj8nvc_hu_e27504d5bc1f0bcb.png" srcset="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/static/Poi8bU4URoQpPzx7zoAcQQj8nvc_hu_e27504d5bc1f0bcb.png 800w, https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/static/Poi8bU4URoQpPzx7zoAcQQj8nvc_hu_edac28f3ea7f9005.png 1280w" sizes="(min-width: 768px) 50vw, 65vw" data-zoom-src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/static/Poi8bU4URoQpPzx7zoAcQQj8nvc.png"></figure> </p> <h2 class="relative group">对象编码的方式 <div id="对象编码的方式" 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%af%b9%e8%b1%a1%e7%bc%96%e7%a0%81%e7%9a%84%e6%96%b9%e5%bc%8f" aria-label="锚点">#</a> </span> </h2> <p><figure><img class="my-0 rounded-md" loading="lazy" decoding="async" fetchpriority="auto" alt="" width="1302" height="590" src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/static/HYrkbgk1GoYAb7xyJ82crsbOnXc_hu_1f92c7848d46a2f5.png" srcset="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/static/HYrkbgk1GoYAb7xyJ82crsbOnXc_hu_1f92c7848d46a2f5.png 800w, https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/static/HYrkbgk1GoYAb7xyJ82crsbOnXc_hu_f5a438ba9998e318.png 1280w" sizes="(min-width: 768px) 50vw, 65vw" data-zoom-src="https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/zset/static/HYrkbgk1GoYAb7xyJ82crsbOnXc.png"></figure> </p>https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/%E9%94%AE-%E8%BF%87%E6%9C%9F/Mon, 01 Jan 0001 00:00:00 +0000https://my.elastic-code.com/zh/docs/redis/%E5%9F%BA%E7%A1%80/%E9%94%AE-%E8%BF%87%E6%9C%9F/<h2 class="relative group">常用设置、查询操作 <div id="常用设置查询操作" 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%b8%b8%e7%94%a8%e8%ae%be%e7%bd%ae%e6%9f%a5%e8%af%a2%e6%93%8d%e4%bd%9c" 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-c" data-lang="c"><span style="display:flex;"><span>EXPIRE key seconds </span></span><span style="display:flex;"><span>PEXPIRE key milliseconds </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span>EXPIREAT key timestamp </span></span><span style="display:flex;"><span>PEXPIREAT key milliseconds<span style="color:#f92672">-</span>timestamp </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span>SETEX key seconds value </span></span><span style="display:flex;"><span>PSETEX key milliseconds value </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span>TTL key </span></span><span style="display:flex;"><span>PTTL key</span></span></code></pre></div></div> <p>Ttl</p>