{"id":167349,"date":"2024-11-06T00:26:24","date_gmt":"2024-11-05T16:26:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/167349\/"},"modified":"2024-11-06T00:26:25","modified_gmt":"2024-11-05T16:26:25","slug":"%e5%88%a9%e7%94%a8redis%e9%9b%86%e5%90%88%e5%af%a6%e7%8f%be%e6%9c%80%e5%a4%a7%e5%80%bc%e7%9a%84%e5%bf%ab%e9%80%9f%e6%9f%a5%e6%89%be%ef%bc%88redis%e9%9b%86%e5%90%88%e8%bf%94%e5%9b%9e%e6%9c%80%e5%a4%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/167349\/","title":{"rendered":"\u5229\u7528Redis\u96c6\u5408\u5be6\u73fe\u6700\u5927\u503c\u7684\u5feb\u901f\u67e5\u627e\uff08redis\u96c6\u5408\u8fd4\u56de\u6700\u5927\u503c\uff09"},"content":{"rendered":"<h1 id=\"%e5%88%a9%e7%94%a8redis%e9%9b%86%e5%90%88%e5%af%a6%e7%8f%be%e6%9c%80%e5%a4%a7%e5%80%bc%e7%9a%84%e5%bf%ab%e9%80%9f%e6%9f%a5%e6%89%be-EajfYvPIYv\">\u5229\u7528Redis\u96c6\u5408\u5be6\u73fe\u6700\u5927\u503c\u7684\u5feb\u901f\u67e5\u627e<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u5feb\u901f\u67e5\u627e\u548c\u8655\u7406\u6578\u64da\u7684\u80fd\u529b\u81f3\u95dc\u91cd\u8981\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u7d50\u69cb\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\u4f86\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u5176\u4e2d\uff0c\u96c6\u5408\uff08Set\uff09\u662f\u4e00\u7a2e\u975e\u5e38\u6709\u7528\u7684\u6578\u64da\u7d50\u69cb\uff0c\u80fd\u5920\u5b58\u5132\u4e0d\u91cd\u8907\u7684\u5143\u7d20\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528Redis\u96c6\u5408\u4f86\u5be6\u73fe\u6700\u5927\u503c\u7684\u5feb\u901f\u67e5\u627e\u3002<\/p>\n<h2 id=\"redis%e9%9b%86%e5%90%88%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-EajfYvPIYv\">Redis\u96c6\u5408\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Redis\u96c6\u5408\u662f\u4e00\u7a2e\u7121\u5e8f\u7684\u5b57\u7b26\u4e32\u96c6\u5408\uff0c\u4e26\u4e14\u4e0d\u5141\u8a31\u91cd\u8907\u7684\u5143\u7d20\u3002\u9019\u4f7f\u5f97\u96c6\u5408\u5728\u9700\u8981\u9032\u884c\u53bb\u91cd\u64cd\u4f5c\u6642\u975e\u5e38\u6709\u6548\u3002\u96c6\u5408\u63d0\u4f9b\u4e86\u591a\u7a2e\u64cd\u4f5c\uff0c\u4f8b\u5982\u6dfb\u52a0\u3001\u522a\u9664\u548c\u67e5\u8a62\u5143\u7d20\u3002\u9019\u4e9b\u64cd\u4f5c\u7684\u6642\u9593\u8907\u96dc\u5ea6\u901a\u5e38\u70baO(1)\uff0c\u9019\u4f7f\u5f97Redis\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u8868\u73fe\u51fa\u8272\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e6%9f%a5%e6%89%be%e6%9c%80%e5%a4%a7%e5%80%bc-EajfYvPIYv\">\u70ba\u4ec0\u9ebc\u9700\u8981\u67e5\u627e\u6700\u5927\u503c<\/h2>\n<p>\u5728\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\uff0c\u67e5\u627e\u6700\u5927\u503c\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u4f8b\u5982\uff0c\u5728\u793e\u4ea4\u5a92\u9ad4\u5e73\u53f0\u4e0a\uff0c\u53ef\u80fd\u9700\u8981\u627e\u51fa\u7528\u6236\u7684\u6700\u9ad8\u5206\u6578\uff1b\u5728\u96fb\u5b50\u5546\u52d9\u7db2\u7ad9\u4e0a\uff0c\u53ef\u80fd\u9700\u8981\u627e\u51fa\u6700\u66a2\u92b7\u7684\u5546\u54c1\u50f9\u683c\u3002\u50b3\u7d71\u7684\u6578\u64da\u7d50\u69cb\u53ef\u80fd\u9700\u8981\u904d\u6b77\u6574\u500b\u96c6\u5408\u4f86\u67e5\u627e\u6700\u5927\u503c\uff0c\u9019\u5728\u6578\u64da\u91cf\u5927\u6642\u6703\u5c0e\u81f4\u6027\u80fd\u74f6\u9838\u3002<\/p>\n<h2 id=\"%e5%88%a9%e7%94%a8redis%e9%9b%86%e5%90%88%e6%9f%a5%e6%89%be%e6%9c%80%e5%a4%a7%e5%80%bc%e7%9a%84%e6%96%b9%e6%b3%95-EajfYvPIYv\">\u5229\u7528Redis\u96c6\u5408\u67e5\u627e\u6700\u5927\u503c\u7684\u65b9\u6cd5<\/h2>\n<p>\u96d6\u7136Redis\u96c6\u5408\u672c\u8eab\u4e0d\u63d0\u4f9b\u76f4\u63a5\u67e5\u627e\u6700\u5927\u503c\u7684\u529f\u80fd\uff0c\u4f46\u6211\u5011\u53ef\u4ee5\u901a\u904e\u4e00\u4e9b\u6280\u5de7\u4f86\u5be6\u73fe\u9019\u4e00\u9700\u6c42\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"%e6%96%b9%e6%b3%95%e4%b8%80%ef%bc%9a%e4%bd%bf%e7%94%a8%e6%9c%89%e5%ba%8f%e9%9b%86%e5%90%88%ef%bc%88sorted-set%ef%bc%89-EajfYvPIYv\">\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528\u6709\u5e8f\u96c6\u5408\uff08Sorted Set\uff09<\/h3>\n<p>\u6709\u5e8f\u96c6\u5408\u662fRedis\u63d0\u4f9b\u7684\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u8207\u96c6\u5408\u985e\u4f3c\uff0c\u4f46\u6bcf\u500b\u5143\u7d20\u90fd\u6709\u4e00\u500b\u5206\u6578\uff08score\uff09\uff0c\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u6839\u64da\u5206\u6578\u9032\u884c\u6392\u5e8f\u3002\u8981\u67e5\u627e\u6700\u5927\u503c\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>ZRANGE mysortedset -1 -1<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u5c07\u8fd4\u56de\u6709\u5e8f\u96c6\u5408\u4e2d\u5206\u6578\u6700\u9ad8\u7684\u5143\u7d20\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u6642\u9593\u8907\u96dc\u5ea6\u70baO(log(N))\uff0c\u76f8\u5c0d\u65bc\u904d\u6b77\u6574\u500b\u96c6\u5408\u4f86\u8aaa\uff0c\u6548\u7387\u66f4\u9ad8\u3002<\/p>\n<h3 id=\"%e6%96%b9%e6%b3%95%e4%ba%8c%ef%bc%9a%e7%b6%ad%e8%ad%b7%e4%b8%80%e5%80%8b%e6%9c%80%e5%a4%a7%e5%80%bc%e8%ae%8a%e9%87%8f-EajfYvPIYv\">\u65b9\u6cd5\u4e8c\uff1a\u7dad\u8b77\u4e00\u500b\u6700\u5927\u503c\u8b8a\u91cf<\/h3>\n<p>\u5982\u679c\u6211\u5011\u4f7f\u7528\u7684\u662f\u666e\u901a\u7684\u96c6\u5408\uff0c\u53ef\u4ee5\u5728\u6bcf\u6b21\u6dfb\u52a0\u6216\u522a\u9664\u5143\u7d20\u6642\uff0c\u624b\u52d5\u7dad\u8b77\u4e00\u500b\u6700\u5927\u503c\u8b8a\u91cf\u3002\u6bcf\u7576\u6211\u5011\u6dfb\u52a0\u4e00\u500b\u65b0\u5143\u7d20\u6642\uff0c\u6aa2\u67e5\u5b83\u662f\u5426\u5927\u65bc\u7576\u524d\u7684\u6700\u5927\u503c\uff0c\u5982\u679c\u662f\uff0c\u5247\u66f4\u65b0\u6700\u5927\u503c\uff1b\u6bcf\u7576\u522a\u9664\u5143\u7d20\u6642\uff0c\u6aa2\u67e5\u88ab\u522a\u9664\u7684\u5143\u7d20\u662f\u5426\u70ba\u6700\u5927\u503c\uff0c\u5982\u679c\u662f\uff0c\u5247\u9700\u8981\u91cd\u65b0\u904d\u6b77\u96c6\u5408\u4f86\u67e5\u627e\u65b0\u7684\u6700\u5927\u503c\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u7f3a\u9ede\u662f\uff0c\u5728\u522a\u9664\u6700\u5927\u503c\u6642\u6027\u80fd\u8f03\u5dee\u3002<\/p>\n<h3 id=\"%e6%96%b9%e6%b3%95%e4%b8%89%ef%bc%9a%e4%bd%bf%e7%94%a8redis%e7%9a%84lua%e8%85%b3%e6%9c%ac-EajfYvPIYv\">\u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528Redis\u7684Lua\u8173\u672c<\/h3>\n<p>Redis\u652f\u6301Lua\u8173\u672c\uff0c\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u5728\u670d\u52d9\u5668\u7aef\u57f7\u884c\u8907\u96dc\u7684\u908f\u8f2f\u3002\u901a\u904e\u7de8\u5beb\u4e00\u500bLua\u8173\u672c\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u4e00\u6b21\u64cd\u4f5c\u4e2d\u67e5\u627e\u6700\u5927\u503c\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u7db2\u7d61\u5ef6\u9072\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Lua\u8173\u672c\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nlocal max_value = nil\nfor _, v in ipairs(redis.call('SMEMBERS', KEYS[1])) do\n    if max_value == nil or tonumber(v) &gt; max_value then\n        max_value = tonumber(v)\n    end\nend\nreturn max_value\n<\/code><\/pre>\n<p>\u9019\u6bb5\u8173\u672c\u5c07\u904d\u6b77\u6307\u5b9a\u96c6\u5408\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u4e26\u8fd4\u56de\u6700\u5927\u503c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-EajfYvPIYv\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u4f7f\u7528Redis\u9032\u884c\u6578\u64da\u8655\u7406\u6642\uff0c\u67e5\u627e\u6700\u5927\u503c\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u901a\u904e\u4f7f\u7528\u6709\u5e8f\u96c6\u5408\u3001\u7dad\u8b77\u6700\u5927\u503c\u8b8a\u91cf\u6216\u5229\u7528Lua\u8173\u672c\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002\u9019\u4e9b\u65b9\u6cd5\u5404\u6709\u512a\u7f3a\u9ede\uff0c\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u53d6\u6c7a\u65bc\u5177\u9ad4\u7684\u61c9\u7528\u5834\u666f\u548c\u6027\u80fd\u9700\u6c42\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a 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