{"id":185052,"date":"2024-11-10T18:20:16","date_gmt":"2024-11-10T10:20:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185052\/"},"modified":"2024-11-10T18:20:17","modified_gmt":"2024-11-10T10:20:17","slug":"%e4%bd%bf%e7%94%a8redis%e9%8e%96%e4%bf%9d%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8%ef%bc%88redis%e9%8e%96%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185052\/","title":{"rendered":"\u4f7f\u7528Redis\u9396\u4fdd\u8b77\u6578\u64da\u5b89\u5168\uff08redis\u9396\u7372\u53d6\u6578\u64da\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8redis%e9%8e%96%e4%bf%9d%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8%ef%bc%88redis%e9%8e%96%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%ef%bc%89-WPmUwSpXKD\">\u4f7f\u7528Redis\u9396\u4fdd\u8b77\u6578\u64da\u5b89\u5168\uff08redis\u9396\u7372\u53d6\u6578\u64da\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5b89\u5168\u6027\u6210\u70ba\u4e86\u4f01\u696d\u904b\u71df\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u8ab2\u984c\u3002\u96a8\u8457\u5206\u4f48\u5f0f\u7cfb\u7d71\u7684\u666e\u53ca\uff0c\u5982\u4f55\u6709\u6548\u5730\u4fdd\u8b77\u6578\u64da\u4e0d\u88ab\u540c\u6642\u8a2a\u554f\u800c\u5c0e\u81f4\u7684\u7af6\u722d\u689d\u4ef6\uff08race condition\uff09\u6210\u70ba\u4e86\u958b\u767c\u8005\u9700\u8981\u9762\u5c0d\u7684\u6311\u6230\u4e4b\u4e00\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u9396\u7684\u6a5f\u5236\u4f86\u5e6b\u52a9\u958b\u767c\u8005\u4fdd\u8b77\u6578\u64da\u7684\u5b89\u5168\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Redis\u9396\u4f86\u4fdd\u8b77\u6578\u64da\u5b89\u5168\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e9%8e%96%ef%bc%9f-WPmUwSpXKD\">\u4ec0\u9ebc\u662fRedis\u9396\uff1f<\/h2>\n<p>Redis\u9396\u662f\u4e00\u7a2e\u7528\u65bc\u63a7\u5236\u5c0d\u5171\u4eab\u8cc7\u6e90\u8a2a\u554f\u7684\u6a5f\u5236\u3002\u7576\u591a\u500b\u9032\u7a0b\u6216\u7dda\u7a0b\u9700\u8981\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\u6642\uff0c\u4f7f\u7528\u9396\u53ef\u4ee5\u78ba\u4fdd\u5728\u540c\u4e00\u6642\u9593\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u80fd\u5920\u8a2a\u554f\u8a72\u8cc7\u6e90\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u6578\u64da\u4e0d\u4e00\u81f4\u6216\u640d\u58de\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/p>\n<h2 id=\"redis%e9%8e%96%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-WPmUwSpXKD\">Redis\u9396\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>Redis\u9396\u7684\u57fa\u672c\u539f\u7406\u662f\u4f7f\u7528SETNX\u547d\u4ee4\u4f86\u8a2d\u7f6e\u4e00\u500b\u9396\u7684\u9375\u3002\u5982\u679c\u8a72\u9375\u4e0d\u5b58\u5728\uff0c\u5247\u8a2d\u7f6e\u6210\u529f\uff0c\u4e26\u8fd4\u56de1\uff1b\u5982\u679c\u8a72\u9375\u5df2\u5b58\u5728\uff0c\u5247\u8fd4\u56de0\u3002\u9019\u6a23\uff0c\u53ea\u6709\u7372\u53d6\u5230\u9396\u7684\u9032\u7a0b\u624d\u80fd\u7e7c\u7e8c\u57f7\u884c\u5f8c\u7e8c\u64cd\u4f5c\u3002<\/p>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e7%9a%84%e9%8e%96%e7%8d%b2%e5%8f%96%e7%a4%ba%e4%be%8b-WPmUwSpXKD\">\u57fa\u672c\u7684\u9396\u7372\u53d6\u793a\u4f8b<\/h3>\n<pre><code>SETNX lock_key unique_lock_value\nEXPIRE lock_key 10\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c<code>lock_key<\/code>\u662f\u9396\u7684\u9375\uff0c<code>unique_lock_value<\/code>\u662f\u7528\u65bc\u6a19\u8b58\u9396\u7684\u552f\u4e00\u503c\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u6b7b\u9396\u7684\u60c5\u6cc1\u767c\u751f\uff0c\u56e0\u70ba\u53ea\u6709\u6301\u6709\u8a72\u552f\u4e00\u503c\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u9396\u3002<\/p>\n<h2 id=\"%e9%8e%96%e7%9a%84%e9%87%8b%e6%94%be-WPmUwSpXKD\">\u9396\u7684\u91cb\u653e<\/h2>\n<p>\u5728\u4f7f\u7528\u9396\u7684\u904e\u7a0b\u4e2d\uff0c\u91cb\u653e\u9396\u662f\u540c\u6a23\u91cd\u8981\u7684\u3002\u91cb\u653e\u9396\u7684\u6642\u5019\u9700\u8981\u78ba\u4fdd\u53ea\u6709\u6301\u6709\u8a72\u9396\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u5b83\u3002\u9019\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u9396\u7684\u552f\u4e00\u503c\u4f86\u5be6\u73fe\u3002<\/p>\n<h3 id=\"%e9%87%8b%e6%94%be%e9%8e%96%e7%9a%84%e7%a4%ba%e4%be%8b-WPmUwSpXKD\">\u91cb\u653e\u9396\u7684\u793a\u4f8b<\/h3>\n<pre><code>if (get(lock_key) == unique_lock_value) {\n    DEL lock_key\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u9996\u5148\u6aa2\u67e5\u7576\u524d\u9032\u7a0b\u662f\u5426\u6301\u6709\u9396\uff0c\u5982\u679c\u662f\uff0c\u5247\u91cb\u653e\u9396\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5176\u4ed6\u9032\u7a0b\u8aa4\u91cb\u653e\u9396\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"redis%e9%8e%96%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-WPmUwSpXKD\">Redis\u9396\u7684\u512a\u7f3a\u9ede<\/h2>\n<h3 id=\"%e5%84%aa%e9%bb%9e-WPmUwSpXKD\">\u512a\u9ede<\/h3>\n<ul>\n<li>\u9ad8\u6548\uff1aRedis\u7684\u6027\u80fd\u975e\u5e38\u9ad8\uff0c\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u901f\u5ea6\u5feb\u3002<\/li>\n<li>\u7c21\u55ae\u6613\u7528\uff1a\u4f7f\u7528Redis\u9396\u7684API\u975e\u5e38\u7c21\u55ae\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5feb\u901f\u4e0a\u624b\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-WPmUwSpXKD\">\u7f3a\u9ede<\/h3>\n<ul>\n<li>\u53ef\u80fd\u6703\u5c0e\u81f4\u6b7b\u9396\uff1a\u5982\u679c\u9396\u7684\u91cb\u653e\u4e0d\u7576\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6b7b\u9396\u7684\u60c5\u6cc1\u3002<\/li>\n<li>\u4f9d\u8cf4\u65bcRedis\u7684\u53ef\u7528\u6027\uff1a\u5982\u679cRedis\u670d\u52d9\u5668\u51fa\u73fe\u6545\u969c\uff0c\u5c07\u7121\u6cd5\u7372\u53d6\u6216\u91cb\u653e\u9396\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-WPmUwSpXKD\">\u7d50\u8ad6<\/h2>\n<p>\u4f7f\u7528Redis\u9396\u4f86\u4fdd\u8b77\u6578\u64da\u5b89\u5168\u662f\u4e00\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5408\u7406\u5730\u8a2d\u7f6e\u548c\u91cb\u653e\u9396\uff0c\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u6578\u64da\u7af6\u722d\u689d\u4ef6\u7684\u767c\u751f\u3002\u7136\u800c\uff0c\u958b\u767c\u8005\u5728\u4f7f\u7528Redis\u9396\u6642\u4e5f\u9700\u8981\u6ce8\u610f\u6f5b\u5728\u7684\u554f\u984c\uff0c\u5982\u6b7b\u9396\u548cRedis\u7684\u53ef\u7528\u6027\u3002\u7e3d\u4e4b\uff0c\u6b63\u78ba\u5730\u4f7f\u7528Redis\u9396\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u7cfb\u7d71\u7684\u6578\u64da\u5b89\u5168\u6027\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\u5e6b\u52a9\u60a8\u4fdd\u8b77\u60a8\u7684\u6578\u64da\u5b89\u5168\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528Redis\u9396\u4fdd\u8b77\u6578\u64da\u5b89\u5168\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u4e26\u767c\u64cd\u4f5c\u5f15\u767c\u7684\u6578\u64da\u932f\u8aa4\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-185052","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185052","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=185052"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185052\/revisions"}],"predecessor-version":[{"id":185053,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185052\/revisions\/185053"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185052"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185052"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185052"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}