{"id":188230,"date":"2024-11-11T20:55:22","date_gmt":"2024-11-11T12:55:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/188230\/"},"modified":"2024-11-11T20:55:23","modified_gmt":"2024-11-11T12:55:23","slug":"%e9%8e%96%e5%ae%9aredis%e5%a6%82%e4%bd%95%e6%89%8d%e8%83%bd%e5%af%a6%e7%8f%be%e9%81%8e%e6%9c%9f%ef%bc%88redis%e9%8e%96%e5%a6%82%e4%bd%95%e9%81%8e%e6%9c%9f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/188230\/","title":{"rendered":"\u9396\u5b9aRedis\u5982\u4f55\u624d\u80fd\u5be6\u73fe\u904e\u671f\uff08redis\u9396\u5982\u4f55\u904e\u671f\uff09"},"content":{"rendered":"<h1 id=\"%e9%8e%96%e5%ae%9aredis%e5%a6%82%e4%bd%95%e6%89%8d%e8%83%bd%e5%af%a6%e7%8f%be%e9%81%8e%e6%9c%9f%ef%bc%88redis%e9%8e%96%e5%a6%82%e4%bd%95%e9%81%8e%e6%9c%9f%ef%bc%89-CqrPFHHBAF\">\u9396\u5b9aRedis\u5982\u4f55\u624d\u80fd\u5be6\u73fe\u904e\u671f\uff08redis\u9396\u5982\u4f55\u904e\u671f\uff09<\/h1>\n<p>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u4f7f\u7528\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u9632\u6b62\u7af6\u722d\u689d\u4ef6\u7684\u91cd\u8981\u624b\u6bb5\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u5f37\u5927\u7684\u9396\u5b9a\u6a5f\u5236\u3002\u7136\u800c\uff0c\u5982\u4f55\u6b63\u78ba\u5730\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\uff0c\u4e26\u78ba\u4fdd\u9396\u5728\u4e0d\u518d\u9700\u8981\u6642\u81ea\u52d5\u91cb\u653e\uff0c\u662f\u4e00\u500b\u503c\u5f97\u6df1\u5165\u63a2\u8a0e\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"redis%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-CqrPFHHBAF\">Redis\u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Redis\u9396\u901a\u5e38\u662f\u901a\u904e\u8a2d\u7f6e\u4e00\u500b\u9375\u4f86\u5be6\u73fe\u7684\uff0c\u9019\u500b\u9375\u7684\u503c\u53ef\u4ee5\u662f\u9396\u7684\u64c1\u6709\u8005\u7684\u6a19\u8b58\u7b26\u3002\u7576\u4e00\u500b\u5ba2\u6236\u7aef\u9700\u8981\u7372\u53d6\u9396\u6642\uff0c\u5b83\u6703\u5617\u8a66\u8a2d\u7f6e\u9019\u500b\u9375\uff0c\u4e26\u8a2d\u7f6e\u4e00\u500b\u904e\u671f\u6642\u9593\uff0c\u4ee5\u9632\u6b62\u6b7b\u9396\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/p>\n<h3 id=\"%e9%8e%96%e7%9a%84%e7%8d%b2%e5%8f%96-CqrPFHHBAF\">\u9396\u7684\u7372\u53d6<\/h3>\n<p>\u7372\u53d6\u9396\u7684\u57fa\u672c\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<pre><code>SET lock_key unique_value NX PX 30000<\/code><\/pre>\n<ul>\n<li><code>lock_key<\/code>\uff1a\u9396\u7684\u9375\u540d\u3002<\/li>\n<li><code>unique_value<\/code>\uff1a\u9396\u7684\u64c1\u6709\u8005\u6a19\u8b58\u7b26\uff0c\u901a\u5e38\u662f\u5ba2\u6236\u7aef\u7684ID\u3002<\/li>\n<li><code>NX<\/code>\uff1a\u53ea\u6709\u7576\u9375\u4e0d\u5b58\u5728\u6642\u624d\u8a2d\u7f6e\u9375\u3002<\/li>\n<li><code>PX 30000<\/code>\uff1a\u8a2d\u7f6e\u9375\u7684\u904e\u671f\u6642\u9593\u70ba30000\u6beb\u79d2\uff0830\u79d2\uff09\u3002<\/li>\n<\/ul>\n<p>\u9019\u6a23\uff0c\u53ea\u6709\u7576\u9396\u4e0d\u5b58\u5728\u6642\uff0c\u5ba2\u6236\u7aef\u624d\u80fd\u6210\u529f\u7372\u53d6\u9396\uff0c\u4e26\u4e14\u9396\u6703\u572830\u79d2\u5f8c\u81ea\u52d5\u904e\u671f\u3002<\/p>\n<h3 id=\"%e9%8e%96%e7%9a%84%e9%87%8b%e6%94%be-CqrPFHHBAF\">\u9396\u7684\u91cb\u653e<\/h3>\n<p>\u91cb\u653e\u9396\u7684\u904e\u7a0b\u4e5f\u975e\u5e38\u91cd\u8981\u3002\u70ba\u4e86\u907f\u514d\u932f\u8aa4\u91cb\u653e\u5176\u4ed6\u5ba2\u6236\u7aef\u7684\u9396\uff0c\u91cb\u653e\u9396\u7684\u64cd\u4f5c\u61c9\u8a72\u6aa2\u67e5\u9396\u7684\u64c1\u6709\u8005\uff1a<\/p>\n<pre><code>if (GET lock_key == unique_value) {\n    DEL lock_key;\n}<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u78ba\u4fdd\u53ea\u6709\u64c1\u6709\u9396\u7684\u5ba2\u6236\u7aef\u624d\u80fd\u91cb\u653e\u9396\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u4e0d\u5fc5\u8981\u7684\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e9%8e%96%e7%9a%84%e9%81%8e%e6%9c%9f%e6%a9%9f%e5%88%b6-CqrPFHHBAF\">\u9396\u7684\u904e\u671f\u6a5f\u5236<\/h2>\n<p>Redis\u7684\u904e\u671f\u6a5f\u5236\u662f\u901a\u904e\u9375\u7684TTL\uff08Time To Live\uff09\u4f86\u5be6\u73fe\u7684\u3002\u7576\u8a2d\u7f6e\u4e86\u904e\u671f\u6642\u9593\u7684\u9375\u5728\u904e\u671f\u5f8c\uff0c\u81ea\u52d5\u88abRedis\u522a\u9664\u3002\u9019\u4e00\u7279\u6027\u5c0d\u65bc\u9396\u7684\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u9632\u6b62\u56e0\u70ba\u5ba2\u6236\u7aef\u6545\u969c\u800c\u5c0e\u81f4\u7684\u6b7b\u9396\u60c5\u6cc1\u3002<\/p>\n<h3 id=\"%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93%e7%9a%84%e8%a8%ad%e7%bd%ae-CqrPFHHBAF\">\u904e\u671f\u6642\u9593\u7684\u8a2d\u7f6e<\/h3>\n<p>\u5728\u8a2d\u7f6e\u9396\u6642\uff0c\u904e\u671f\u6642\u9593\u7684\u9078\u64c7\u61c9\u6839\u64da\u696d\u52d9\u9700\u6c42\u4f86\u78ba\u5b9a\u3002\u904e\u671f\u6642\u9593\u904e\u77ed\u53ef\u80fd\u5c0e\u81f4\u9396\u904e\u65e9\u91cb\u653e\uff0c\u5f9e\u800c\u5f71\u97ff\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff1b\u800c\u904e\u671f\u6642\u9593\u904e\u9577\u5247\u53ef\u80fd\u5c0e\u81f4\u8cc7\u6e90\u7684\u6d6a\u8cbb\u548c\u6b7b\u9396\u7684\u98a8\u96aa\u3002\u56e0\u6b64\uff0c\u5408\u7406\u7684\u904e\u671f\u6642\u9593\u8a2d\u7f6e\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac%e4%be%86%e5%af%a6%e7%8f%be%e5%8e%9f%e5%ad%90%e6%93%8d%e4%bd%9c-CqrPFHHBAF\">\u4f7f\u7528Lua\u8173\u672c\u4f86\u5be6\u73fe\u539f\u5b50\u64cd\u4f5c<\/h3>\n<p>\u70ba\u4e86\u9032\u4e00\u6b65\u63d0\u9ad8\u9396\u7684\u5b89\u5168\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528Lua\u8173\u672c\u4f86\u5be6\u73fe\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u64cd\u4f5c\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u9019\u4e9b\u64cd\u4f5c\u662f\u539f\u5b50\u6027\u7684\uff0c\u907f\u514d\u4e86\u5728\u591a\u5ba2\u6236\u7aef\u74b0\u5883\u4e0b\u7684\u7af6\u722d\u689d\u4ef6\uff1a<\/p>\n<pre><code>local lock_value = redis.call(\"GET\", KEYS[1])\nif not lock_value then\n    redis.call(\"SET\", KEYS[1], ARGV[1], \"PX\", ARGV[2])\n    return true\nelse\n    return false\nend<\/code><\/pre>\n<p>\u9019\u6bb5Lua\u8173\u672c\u6aa2\u67e5\u9396\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u5247\u8a2d\u7f6e\u9396\u4e26\u8fd4\u56de\u6210\u529f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-CqrPFHHBAF\">\u7e3d\u7d50<\/h2>\n<p>\u5728Redis\u4e2d\u5be6\u73fe\u9396\u7684\u904e\u671f\u6a5f\u5236\u662f\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\uff0c\u6b63\u78ba\u7684\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u548c\u4f7f\u7528\u539f\u5b50\u64cd\u4f5c\u53ef\u4ee5\u6709\u6548\u5730\u9632\u6b62\u6b7b\u9396\u548c\u8cc7\u6e90\u6d6a\u8cbb\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u5be6\u73fe\uff0cRedis\u9396\u53ef\u4ee5\u70ba\u5206\u4f48\u5f0f\u7cfb\u7d71\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\u4f7f\u7528Redis\u9396\u6709\u66f4\u591a\u7684\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728Redis\u4e2d\u5be6\u73fe\u9396\u5b9a\u904e\u671f\uff0c\u78ba\u4fdd\u8cc7\u6e90\u6709\u6548\u7ba1\u7406\uff0c\u907f\u514d\u6b7b\u9396\u554f\u984c\uff0c\u63d0\u5347\u7cfb\u7d71\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-188230","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188230","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=188230"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188230\/revisions"}],"predecessor-version":[{"id":188231,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188230\/revisions\/188231"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=188230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=188230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=188230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}