{"id":105118,"date":"2024-10-23T12:39:45","date_gmt":"2024-10-23T04:39:45","guid":{"rendered":"https:\/\/server.hk\/cnblog\/105118\/"},"modified":"2024-10-23T12:39:45","modified_gmt":"2024-10-23T04:39:45","slug":"redis-%e9%81%8e%e6%9c%9f%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e5%a4%9a%e7%b7%9a%e7%a8%8b%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/105118\/","title":{"rendered":"Redis \u904e\u671f\u5982\u4f55\u5be6\u73fe\u591a\u7dda\u7a0b\u64cd\u4f5c"},"content":{"rendered":"<h1 id=\"redis-%e9%81%8e%e6%9c%9f%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e5%a4%9a%e7%b7%9a%e7%a8%8b%e6%93%8d%e4%bd%9c-npDqoEvQYR\">Redis \u904e\u671f\u5982\u4f55\u5be6\u73fe\u591a\u7dda\u7a0b\u64cd\u4f5c<\/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\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u6578\u64da\u6301\u4e45\u5316\u7b49\u5834\u666f\u3002Redis \u63d0\u4f9b\u4e86\u904e\u671f\u9375\u7684\u529f\u80fd\uff0c\u80fd\u5920\u81ea\u52d5\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\uff0c\u9019\u5c0d\u65bc\u8cc7\u6e90\u7684\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u7136\u800c\uff0c\u7576\u6d89\u53ca\u5230\u591a\u7dda\u7a0b\u64cd\u4f5c\u6642\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406 Redis \u7684\u904e\u671f\u9375\u6210\u70ba\u4e86\u4e00\u500b\u503c\u5f97\u63a2\u8a0e\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"redis-%e7%9a%84%e9%81%8e%e6%9c%9f%e6%a9%9f%e5%88%b6-npDqoEvQYR\">Redis \u7684\u904e\u671f\u6a5f\u5236<\/h2>\n<p>Redis \u7684\u904e\u671f\u6a5f\u5236\u4e3b\u8981\u6709\u5169\u7a2e\u65b9\u5f0f\uff1a\u5b9a\u6642\u522a\u9664\u548c\u60f0\u6027\u522a\u9664\u3002\u5b9a\u6642\u522a\u9664\u662f Redis \u5728\u6bcf\u79d2\u904b\u884c\u4e00\u6b21\u7684\u904e\u671f\u6aa2\u67e5\uff0c\u6703\u96a8\u6a5f\u9078\u64c7\u4e00\u90e8\u5206\u9375\u4f86\u6aa2\u67e5\u662f\u5426\u904e\u671f\uff1b\u800c\u60f0\u6027\u522a\u9664\u5247\u662f\u5728\u6bcf\u6b21\u8a2a\u554f\u9375\u6642\u6aa2\u67e5\u8a72\u9375\u662f\u5426\u904e\u671f\u3002\u9019\u5169\u7a2e\u65b9\u5f0f\u5404\u6709\u512a\u7f3a\u9ede\uff0c\u5b9a\u6642\u522a\u9664\u80fd\u5920\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u6e1b\u5c11\u5167\u5b58\u7684\u4f7f\u7528\uff0c\u4f46\u53ef\u80fd\u6703\u5c0e\u81f4\u77ed\u6642\u9593\u5167\u7684\u5167\u5b58\u5cf0\u503c\uff1b\u800c\u60f0\u6027\u522a\u9664\u5247\u53ef\u80fd\u5c0e\u81f4\u904e\u671f\u9375\u7684\u7a4d\u7d2f\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e7%b7%9a%e7%a8%8b%e7%92%b0%e5%a2%83%e4%b8%8b%e7%9a%84%e6%8c%91%e6%88%b0-npDqoEvQYR\">\u591a\u7dda\u7a0b\u74b0\u5883\u4e0b\u7684\u6311\u6230<\/h2>\n<p>\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u5c0d Redis \u7684\u64cd\u4f5c\u53ef\u80fd\u6703\u5c0e\u81f4\u7af6\u722d\u689d\u4ef6\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u904e\u671f\u9375\u6642\u3002\u7576\u591a\u500b\u7dda\u7a0b\u540c\u6642\u8a2a\u554f\u540c\u4e00\u500b\u9375\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u4e00\u500b\u7dda\u7a0b\u5728\u6aa2\u67e5\u9375\u662f\u5426\u904e\u671f\u6642\uff0c\u53e6\u4e00\u500b\u7dda\u7a0b\u5df2\u7d93\u522a\u9664\u4e86\u8a72\u9375\u3002<\/li>\n<li>\u591a\u500b\u7dda\u7a0b\u540c\u6642\u8a2d\u7f6e\u76f8\u540c\u7684\u9375\uff0c\u5c0e\u81f4\u904e\u671f\u6642\u9593\u7684\u7af6\u722d\u3002<\/li>\n<li>\u904e\u671f\u9375\u7684\u6aa2\u67e5\u548c\u522a\u9664\u64cd\u4f5c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-npDqoEvQYR\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u9019\u4e9b\u6311\u6230\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u7b56\u7565\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-lua-%e8%85%b3%e6%9c%ac-npDqoEvQYR\">1. \u4f7f\u7528 Lua \u8173\u672c<\/h3>\n<p>Redis \u652f\u6301 Lua \u8173\u672c\uff0c\u53ef\u4ee5\u5c07\u591a\u500b\u64cd\u4f5c\u5c01\u88dd\u5728\u4e00\u500b\u539f\u5b50\u64cd\u4f5c\u4e2d\u57f7\u884c\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u51fa\u73fe\u7af6\u722d\u689d\u4ef6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>\nEVAL \"if redis.call('exists', KEYS[1]) == 1 then return redis.call('expire', KEYS[1], ARGV[1]) end\" 1 mykey 10\n<\/code><\/pre>\n<p>\u9019\u6bb5\u8173\u672c\u6aa2\u67e5\u9375\u662f\u5426\u5b58\u5728\uff0c\u82e5\u5b58\u5728\u5247\u8a2d\u7f6e\u904e\u671f\u6642\u9593\uff0c\u5f9e\u800c\u78ba\u4fdd\u64cd\u4f5c\u7684\u539f\u5b50\u6027\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e5%88%86%e5%b8%83%e5%bc%8f%e9%8e%96-npDqoEvQYR\">2. \u4f7f\u7528\u5206\u5e03\u5f0f\u9396<\/h3>\n<p>\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 Redis \u7684\u5206\u5e03\u5f0f\u9396\u4f86\u4fdd\u8b77\u5c0d\u904e\u671f\u9375\u7684\u64cd\u4f5c\u3002\u53ef\u4ee5\u4f7f\u7528 SETNX \u547d\u4ee4\u4f86\u5be6\u73fe\u9396\u7684\u6a5f\u5236\uff1a<\/p>\n<pre><code>\nlocal lock_key = \"lock:\" .. KEYS[1]\nif redis.call('setnx', lock_key, 1) == 1 then\n    redis.call('expire', lock_key, 5) -- \u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\n    -- \u57f7\u884c\u904e\u671f\u64cd\u4f5c\n    redis.call('expire', KEYS[1], ARGV[1])\n    redis.call('del', lock_key) -- \u91cb\u653e\u9396\nend\n<\/code><\/pre>\n<h3 id=\"3-%e5%ae%9a%e6%9c%9f%e6%b8%85%e7%90%86%e9%81%8e%e6%9c%9f%e9%8d%b5-npDqoEvQYR\">3. \u5b9a\u671f\u6e05\u7406\u904e\u671f\u9375<\/h3>\n<p>\u5728\u61c9\u7528\u5c64\u9762\uff0c\u53ef\u4ee5\u8a2d\u8a08\u4e00\u500b\u5b9a\u671f\u4efb\u52d9\uff0c\u5c08\u9580\u7528\u4f86\u6e05\u7406\u904e\u671f\u9375\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11 Redis \u7684\u5167\u5b58\u4f7f\u7528\uff0c\u4e26\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-npDqoEvQYR\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u7ba1\u7406 Redis \u7684\u904e\u671f\u9375\u9700\u8981\u8b39\u614e\u8003\u616e\u7af6\u722d\u689d\u4ef6\u548c\u6027\u80fd\u554f\u984c\u3002\u901a\u904e\u4f7f\u7528 Lua \u8173\u672c\u3001\u5206\u5e03\u5f0f\u9396\u4ee5\u53ca\u5b9a\u671f\u6e05\u7406\u904e\u671f\u9375\u7b49\u7b56\u7565\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e9b\u6311\u6230\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u61c9\u7528\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u63d0\u5347\u6574\u9ad4\u6027\u80fd\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\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\uff0c\u7121\u8ad6\u662f\u7de9\u5b58\u9084\u662f\u6578\u64da\u5b58\u5132\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5728 Redis \u4e2d\u5be6\u73fe\u591a\u7dda\u7a0b\u64cd\u4f5c\u4ee5\u7ba1\u7406\u904e\u671f\u9375\uff0c\u63d0\u5347\u6027\u80fd\u8207\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u53ef\u9760\u6027\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-105118","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/105118","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=105118"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/105118\/revisions"}],"predecessor-version":[{"id":105119,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/105118\/revisions\/105119"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=105118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=105118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=105118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}