{"id":184380,"date":"2024-11-10T12:44:19","date_gmt":"2024-11-10T04:44:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/184380\/"},"modified":"2024-11-10T12:44:20","modified_gmt":"2024-11-10T04:44:20","slug":"%e4%bd%bf%e7%94%a8redis%e7%8d%b2%e5%8f%96%e9%9a%8a%e5%88%97%e9%95%b7%e5%ba%a6%ef%bc%88redis%e7%8d%b2%e5%be%97%e9%9a%8a%e5%88%97%e9%95%b7%e5%ba%a6%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/184380\/","title":{"rendered":"\u4f7f\u7528Redis\u7372\u53d6\u968a\u5217\u9577\u5ea6\uff08redis\u7372\u5f97\u968a\u5217\u9577\u5ea6\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8redis%e7%8d%b2%e5%8f%96%e9%9a%8a%e5%88%97%e9%95%b7%e5%ba%a6%ef%bc%88redis%e7%8d%b2%e5%be%97%e9%9a%8a%e5%88%97%e9%95%b7%e5%ba%a6%ef%bc%89-SCmejWtCyK\">\u4f7f\u7528Redis\u7372\u53d6\u968a\u5217\u9577\u5ea6\uff08redis\u7372\u5f97\u968a\u5217\u9577\u5ea6\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0cRedis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u6578\u64da\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u8655\u7406\u7b49\u5834\u666f\u3002\u7279\u5225\u662f\u5728\u8655\u7406\u968a\u5217\u6642\uff0cRedis\u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u5f37\u5927\u7684\u529f\u80fd\uff0c\u8b93\u958b\u767c\u8005\u80fd\u5920\u8f15\u9b06\u7372\u53d6\u968a\u5217\u7684\u9577\u5ea6\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Redis\u4f86\u7372\u53d6\u968a\u5217\u9577\u5ea6\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"redis%e7%9a%84%e6%95%b8%e6%93%9a%e7%b5%90%e6%a7%8b-SCmejWtCyK\">Redis\u7684\u6578\u64da\u7d50\u69cb<\/h2>\n<p>Redis\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u5305\u62ec\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u548c\u6709\u5e8f\u96c6\u5408\u3002\u5728\u968a\u5217\u7684\u5be6\u73fe\u4e2d\uff0cRedis\u7684\u5217\u8868\uff08List\uff09\u6578\u64da\u7d50\u69cb\u662f\u6700\u5e38\u898b\u7684\u9078\u64c7\u3002\u5217\u8868\u5141\u8a31\u5728\u5169\u7aef\u9032\u884c\u63d2\u5165\u548c\u522a\u9664\u64cd\u4f5c\uff0c\u9019\u4f7f\u5f97\u5b83\u975e\u5e38\u9069\u5408\u7528\u4f5c\u5148\u9032\u5148\u51fa\uff08FIFO\uff09\u7684\u968a\u5217\u3002<\/p>\n<h2 id=\"%e7%8d%b2%e5%8f%96%e9%9a%8a%e5%88%97%e9%95%b7%e5%ba%a6%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%91%bd%e4%bb%a4-SCmejWtCyK\">\u7372\u53d6\u968a\u5217\u9577\u5ea6\u7684\u57fa\u672c\u547d\u4ee4<\/h2>\n<p>\u8981\u7372\u53d6Redis\u5217\u8868\u7684\u9577\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528\u547d\u4ee4 <code>LLEN<\/code>\u3002\u9019\u500b\u547d\u4ee4\u6703\u8fd4\u56de\u6307\u5b9a\u5217\u8868\u7684\u5143\u7d20\u6578\u91cf\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>LLEN<\/code> \u547d\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>LLEN key<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>key<\/code> \u662f\u4f60\u8981\u67e5\u8a62\u7684\u5217\u8868\u7684\u9375\u540d\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-SCmejWtCyK\">\u793a\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>myQueue<\/code> \u7684\u5217\u8868\uff0c\u4e26\u4e14\u6211\u5011\u60f3\u8981\u7372\u53d6\u5b83\u7684\u9577\u5ea6\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>LLEN myQueue<\/code><\/pre>\n<p>\u5982\u679c <code>myQueue<\/code> \u4e2d\u6709 5 \u500b\u5143\u7d20\uff0c\u5247\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f\uff1a<\/p>\n<pre><code>(integer) 5<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8redis%e7%9a%84%e5%ae%a2%e6%88%b6%e7%ab%af%e5%ba%ab-SCmejWtCyK\">\u4f7f\u7528Redis\u7684\u5ba2\u6236\u7aef\u5eab<\/h2>\n<p>\u5728\u5be6\u969b\u958b\u767c\u4e2d\uff0c\u901a\u5e38\u6703\u4f7f\u7528Redis\u7684\u5ba2\u6236\u7aef\u5eab\u4f86\u8207Redis\u9032\u884c\u4ea4\u4e92\u3002\u9019\u4e9b\u5eab\u63d0\u4f9b\u4e86\u66f4\u9ad8\u5c64\u6b21\u7684API\uff0c\u4f7f\u5f97\u64cd\u4f5c\u66f4\u52a0\u65b9\u4fbf\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Python\u7684 <code>redis-py<\/code> \u5eab\u4f86\u7372\u53d6\u968a\u5217\u9577\u5ea6\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>import redis\n\n# \u9023\u63a5\u5230Redis\u670d\u52d9\u5668\nr = redis.Redis(host='localhost', port=6379, db=0)\n\n# \u7372\u53d6\u968a\u5217\u9577\u5ea6\nlength = r.llen('myQueue')\nprint(f'\u968a\u5217\u9577\u5ea6: {length}')\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u9023\u63a5\u5230\u672c\u5730\u7684Redis\u670d\u52d9\u5668\uff0c\u7136\u5f8c\u4f7f\u7528 <code>llen<\/code> \u65b9\u6cd5\u4f86\u7372\u53d6 <code>myQueue<\/code> \u7684\u9577\u5ea6\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-SCmejWtCyK\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528Redis\u7372\u53d6\u968a\u5217\u9577\u5ea6\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u6307\u5b9a\u7684\u9375\u4e0d\u5b58\u5728\uff0c<code>LLEN<\/code> \u547d\u4ee4\u5c07\u8fd4\u56de 0\u3002<\/li>\n<li>Redis\u7684\u5217\u8868\u662f\u57fa\u65bc\u93c8\u8868\u5be6\u73fe\u7684\uff0c\u56e0\u6b64\u5728\u9577\u5ea6\u975e\u5e38\u5927\u7684\u60c5\u6cc1\u4e0b\uff0c\u7372\u53d6\u9577\u5ea6\u7684\u64cd\u4f5c\u4ecd\u7136\u662fO(1)\u7684\u6642\u9593\u8907\u96dc\u5ea6\u3002<\/li>\n<li>\u78ba\u4fdd\u5728\u591a\u7dda\u7a0b\u6216\u591a\u9032\u7a0b\u74b0\u5883\u4e2d\u6b63\u78ba\u8655\u7406\u5c0d\u540c\u4e00\u968a\u5217\u7684\u4e26\u767c\u8a2a\u554f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SCmejWtCyK\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528Redis\u7372\u53d6\u968a\u5217\u9577\u5ea6\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u64cd\u4f5c\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5feb\u901f\u4e86\u89e3\u968a\u5217\u7684\u72c0\u614b\u3002\u901a\u904e\u4f7f\u7528 <code>LLEN<\/code> \u547d\u4ee4\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u7372\u53d6\u5217\u8868\u7684\u5143\u7d20\u6578\u91cf\uff0c\u4e26\u5728\u61c9\u7528\u4e2d\u9032\u884c\u76f8\u61c9\u7684\u8655\u7406\u3002\u7121\u8ad6\u662f\u5728\u6d88\u606f\u968a\u5217\u9084\u662f\u4efb\u52d9\u8abf\u5ea6\u4e2d\uff0cRedis\u90fd\u80fd\u63d0\u4f9b\u9ad8\u6548\u7684\u652f\u6301\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684Redis\u670d\u52d9\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4f7f\u7528Redis\u7372\u53d6\u968a\u5217\u9577\u5ea6\uff0c\u7c21\u5316\u6578\u64da\u8655\u7406\u548c\u7ba1\u7406\uff0c\u63d0\u9ad8\u61c9\u7528\u6027\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-184380","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/184380","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=184380"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/184380\/revisions"}],"predecessor-version":[{"id":184381,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/184380\/revisions\/184381"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=184380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=184380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=184380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}