{"id":167603,"date":"2024-11-06T02:28:23","date_gmt":"2024-11-05T18:28:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/167603\/"},"modified":"2024-11-06T02:28:23","modified_gmt":"2024-11-05T18:28:23","slug":"%e5%88%a9%e7%94%a8redis%e9%85%8d%e7%bd%ae%e9%9a%8a%e5%88%97%e7%9a%84%e6%9c%80%e5%a4%a7%e9%95%b7%e5%ba%a6%ef%bc%88redis%e9%85%8d%e7%bd%ae%e9%9a%8a%e5%88%97%e9%95%b7%e5%ba%a6%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/167603\/","title":{"rendered":"\u5229\u7528Redis\u914d\u7f6e\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6\uff08redis\u914d\u7f6e\u968a\u5217\u9577\u5ea6\uff09"},"content":{"rendered":"<h1 id=\"%e5%88%a9%e7%94%a8redis%e9%85%8d%e7%bd%ae%e9%9a%8a%e5%88%97%e7%9a%84%e6%9c%80%e5%a4%a7%e9%95%b7%e5%ba%a6%ef%bc%88redis%e9%85%8d%e7%bd%ae%e9%9a%8a%e5%88%97%e9%95%b7%e5%ba%a6%ef%bc%89-ItqgFeSzAJ\">\u5229\u7528Redis\u914d\u7f6e\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6\uff08redis\u914d\u7f6e\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\u6578\u64da\u7d50\u69cb\u4f3a\u670d\u5668\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u968a\u5217\u6642\u3002Redis\u7684\u968a\u5217\u529f\u80fd\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u8f15\u9b06\u5730\u7ba1\u7406\u4efb\u52d9\u548c\u6d88\u606f\u7684\u50b3\u905e\u3002\u7136\u800c\uff0c\u7576\u968a\u5217\u7684\u9577\u5ea6\u4e0d\u53d7\u9650\u5236\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u5167\u5b58\u7684\u904e\u5ea6\u4f7f\u7528\uff0c\u751a\u81f3\u5f71\u97ff\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002\u56e0\u6b64\uff0c\u5408\u7406\u914d\u7f6eRedis\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h2 id=\"redis%e9%9a%8a%e5%88%97%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-ItqgFeSzAJ\">Redis\u968a\u5217\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728Redis\u4e2d\uff0c\u968a\u5217\u901a\u5e38\u662f\u901a\u904e\u5217\u8868\uff08List\uff09\u6578\u64da\u7d50\u69cb\u4f86\u5be6\u73fe\u7684\u3002\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528LPUSH\u548cRPUSH\u547d\u4ee4\u5c07\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u7684\u5169\u7aef\uff0c\u4e26\u4f7f\u7528LPOP\u548cRPOP\u547d\u4ee4\u5f9e\u5217\u8868\u4e2d\u79fb\u9664\u5143\u7d20\u3002\u9019\u7a2e\u5148\u9032\u5148\u51fa\uff08FIFO\uff09\u7684\u7279\u6027\u4f7f\u5f97Redis\u975e\u5e38\u9069\u5408\u7528\u65bc\u4efb\u52d9\u6392\u7a0b\u548c\u6d88\u606f\u968a\u5217\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e9%85%8d%e7%bd%ae%e9%9a%8a%e5%88%97%e7%9a%84%e6%9c%80%e5%a4%a7%e9%95%b7%e5%ba%a6-ItqgFeSzAJ\">\u70ba\u4ec0\u9ebc\u9700\u8981\u914d\u7f6e\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6<\/h2>\n<p>\u914d\u7f6e\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u63a7\u5236\u5167\u5b58\u7684\u4f7f\u7528\uff0c\u907f\u514d\u56e0\u70ba\u7121\u9650\u5236\u7684\u6578\u64da\u589e\u9577\u800c\u5c0e\u81f4\u7684\u6027\u80fd\u554f\u984c\u3002\u7576\u968a\u5217\u7684\u9577\u5ea6\u8d85\u904e\u9810\u8a2d\u7684\u6700\u5927\u503c\u6642\uff0c\u53ef\u4ee5\u9078\u64c7\u4e1f\u68c4\u820a\u7684\u6578\u64da\u6216\u62d2\u7d55\u65b0\u7684\u6578\u64da\u9032\u5165\u968a\u5217\u3002\u9019\u6a23\u7684\u7b56\u7565\u53ef\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u5728\u9ad8\u8ca0\u8f09\u60c5\u6cc1\u4e0b\u4ecd\u7136\u80fd\u5920\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e9%85%8d%e7%bd%aeredis%e9%9a%8a%e5%88%97%e7%9a%84%e6%9c%80%e5%a4%a7%e9%95%b7%e5%ba%a6-ItqgFeSzAJ\">\u5982\u4f55\u914d\u7f6eRedis\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6<\/h2>\n<p>\u5728Redis\u4e2d\uff0c\u914d\u7f6e\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528\u5217\u8868\u7684\u7279\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u65b9\u6cd5\u4f86\u9650\u5236\u968a\u5217\u7684\u9577\u5ea6\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8ltrim%e5%91%bd%e4%bb%a4-ItqgFeSzAJ\">1. \u4f7f\u7528Ltrim\u547d\u4ee4<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528Ltrim\u547d\u4ee4\u4f86\u4fee\u526a\u5217\u8868\uff0c\u4fdd\u6301\u5176\u9577\u5ea6\u5728\u6307\u5b9a\u7bc4\u570d\u5167\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u5e0c\u671b\u4fdd\u6301\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6\u70ba100\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>LTRIM myqueue 0 99<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u6703\u5c07\u5217\u8868myqueue\u7684\u9577\u5ea6\u9650\u5236\u5728100\u500b\u5143\u7d20\u4ee5\u5167\uff0c\u8d85\u904e\u7684\u5143\u7d20\u5c07\u88ab\u522a\u9664\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac-ItqgFeSzAJ\">2. \u4f7f\u7528Lua\u8173\u672c<\/h3>\n<p>\u5982\u679c\u9700\u8981\u66f4\u8907\u96dc\u7684\u908f\u8f2f\u4f86\u8655\u7406\u968a\u5217\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528Lua\u8173\u672c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Lua\u8173\u672c\u793a\u4f8b\uff0c\u7528\u65bc\u6aa2\u67e5\u968a\u5217\u9577\u5ea6\u4e26\u5728\u5fc5\u8981\u6642\u4fee\u526a\uff1a<\/p>\n<pre><code>\nlocal max_length = 100\nlocal current_length = redis.call('LLEN', KEYS[1])\n\nif current_length &gt;= max_length then\n    redis.call('LTRIM', KEYS[1], 0, max_length - 1)\nend\n\nredis.call('RPUSH', KEYS[1], ARGV[1])\n<\/code><\/pre>\n<p>\u9019\u6bb5\u8173\u672c\u6703\u5728\u6dfb\u52a0\u65b0\u5143\u7d20\u4e4b\u524d\u6aa2\u67e5\u968a\u5217\u7684\u9577\u5ea6\uff0c\u4e26\u5728\u8d85\u904e\u6700\u5927\u9577\u5ea6\u6642\u81ea\u52d5\u4fee\u526a\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-ItqgFeSzAJ\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li><strong>\u5b9a\u671f\u76e3\u63a7\uff1a<\/strong>\u5b9a\u671f\u6aa2\u67e5\u968a\u5217\u7684\u9577\u5ea6\u548c\u5167\u5b58\u4f7f\u7528\u60c5\u6cc1\uff0c\u4ee5\u4fbf\u53ca\u6642\u8abf\u6574\u914d\u7f6e\u3002<\/li>\n<li><strong>\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u7d50\u69cb\uff1a<\/strong>\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684Redis\u6578\u64da\u7d50\u69cb\uff0c\u4f8b\u5982\u4f7f\u7528\u96c6\u5408\uff08Set\uff09\u6216\u6709\u5e8f\u96c6\u5408\uff08Sorted Set\uff09\u4f86\u66ff\u4ee3\u5217\u8868\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u6027\u80fd\uff1a<\/strong>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u90e8\u7f72\u4e4b\u524d\uff0c\u9032\u884c\u5145\u5206\u7684\u6027\u80fd\u6e2c\u8a66\uff0c\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u80fd\u5920\u627f\u53d7\u9810\u671f\u7684\u8ca0\u8f09\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ItqgFeSzAJ\">\u7e3d\u7d50<\/h2>\n<p>\u5408\u7406\u914d\u7f6eRedis\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6\u4e0d\u50c5\u80fd\u5920\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u6709\u6548\u7ba1\u7406\u5167\u5b58\u4f7f\u7528\u3002\u901a\u904e\u4f7f\u7528Ltrim\u547d\u4ee4\u6216Lua\u8173\u672c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9748\u6d3b\u5730\u63a7\u5236\u968a\u5217\u7684\u9577\u5ea6\uff0c\u78ba\u4fdd\u7cfb\u7d71\u5728\u9ad8\u8ca0\u8f09\u4e0b\u4ecd\u80fd\u6b63\u5e38\u904b\u884c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684Redis\u914d\u7f6e\u662f\u81f3\u95dc\u91cd\u8981\u7684\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\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\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\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728Redis\u4e2d\u914d\u7f6e\u968a\u5217\u7684\u6700\u5927\u9577\u5ea6\uff0c\u4ee5\u512a\u5316\u6578\u64da\u8655\u7406\u548c\u8cc7\u6e90\u7ba1\u7406\uff0c\u63d0\u5347\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-167603","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167603","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=167603"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167603\/revisions"}],"predecessor-version":[{"id":167604,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167603\/revisions\/167604"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=167603"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=167603"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=167603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}