{"id":129315,"date":"2024-10-26T20:42:20","date_gmt":"2024-10-26T12:42:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/129315\/"},"modified":"2024-10-26T20:42:21","modified_gmt":"2024-10-26T12:42:21","slug":"redis%e9%8e%96%e4%bf%9d%e8%ad%b7%e6%a5%ad%e5%8b%99%e7%9a%84%e8%a6%81%e5%a1%9e%ef%bc%88redis%e9%8e%96%e5%81%9a%e4%bb%80%e9%ba%bc%e7%94%a8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/129315\/","title":{"rendered":"Redis\u9396\u4fdd\u8b77\u696d\u52d9\u7684\u8981\u585e\uff08redis\u9396\u505a\u4ec0\u9ebc\u7528\uff09"},"content":{"rendered":"<h1 id=\"redis%e9%8e%96%e4%bf%9d%e8%ad%b7%e6%a5%ad%e5%8b%99%e7%9a%84%e8%a6%81%e5%a1%9e%ef%bc%88redis%e9%8e%96%e5%81%9a%e4%bb%80%e9%ba%bc%e7%94%a8%ef%bc%89-hVwiTOFUVi\">Redis\u9396\u4fdd\u8b77\u696d\u52d9\u7684\u8981\u585e\uff08Redis\u9396\u505a\u4ec0\u9ebc\u7528\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u4e00\u81f4\u6027\u548c\u8cc7\u6e90\u7ba1\u7406\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u5e6b\u52a9\u958b\u767c\u8005\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\u3002\u5176\u4e2d\uff0cRedis\u9396\u662f\u4e00\u500b\u91cd\u8981\u7684\u5de5\u5177\uff0c\u80fd\u5920\u6709\u6548\u5730\u4fdd\u8b77\u696d\u52d9\u908f\u8f2f\uff0c\u9632\u6b62\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eRedis\u9396\u7684\u7528\u9014\u53ca\u5176\u5728\u696d\u52d9\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e9%8e%96%ef%bc%9f-hVwiTOFUVi\">\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\u5b83\u7684\u4e3b\u8981\u76ee\u7684\u662f\u78ba\u4fdd\u5728\u540c\u4e00\u6642\u9593\u5167\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u53ef\u4ee5\u8a2a\u554f\u7279\u5b9a\u7684\u8cc7\u6e90\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\u3002Redis\u9396\u901a\u5e38\u662f\u57fa\u65bcRedis\u7684\u539f\u5b50\u64cd\u4f5c\u4f86\u5be6\u73fe\u7684\uff0c\u9019\u4f7f\u5f97\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u904e\u7a0b\u975e\u5e38\u9ad8\u6548\u3002<\/p>\n<h2 id=\"redis%e9%8e%96%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-hVwiTOFUVi\">Redis\u9396\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>Redis\u9396\u7684\u57fa\u672c\u5de5\u4f5c\u539f\u7406\u662f\u4f7f\u7528SETNX\u547d\u4ee4\u3002\u9019\u500b\u547d\u4ee4\u7684\u5168\u540d\u662f\u201cSET if Not eXists\u201d\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u53ea\u6709\u5728\u9375\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u624d\u6703\u8a2d\u7f6e\u9375\u7684\u503c\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u80fd\u5920\u6210\u529f\u7372\u53d6\u9396\u3002<\/p>\n<pre><code>SETNX lock_key unique_lock_value\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<code>lock_key<\/code>\u662f\u9396\u7684\u540d\u7a31\uff0c\u800c<code>unique_lock_value<\/code>\u662f\u7528\u65bc\u6a19\u8b58\u9396\u7684\u552f\u4e00\u503c\u3002\u7576\u4e00\u500b\u9032\u7a0b\u6210\u529f\u57f7\u884c\u9019\u500b\u547d\u4ee4\u6642\uff0c\u5b83\u5c31\u7372\u5f97\u4e86\u9396\u3002\u5176\u4ed6\u9032\u7a0b\u5247\u7121\u6cd5\u7372\u53d6\u9019\u500b\u9396\uff0c\u76f4\u5230\u5b83\u88ab\u91cb\u653e\u3002<\/p>\n<h2 id=\"redis%e9%8e%96%e7%9a%84%e5%84%aa%e5%8b%a2-hVwiTOFUVi\">Redis\u9396\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u9ad8\u6548\u6027\uff1a<\/strong>Redis\u7684\u5167\u5b58\u5b58\u5132\u7279\u6027\u4f7f\u5f97\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u901f\u5ea6\u975e\u5e38\u5feb\u3002<\/li>\n<li><strong>\u7c21\u55ae\u6027\uff1a<\/strong>\u4f7f\u7528Redis\u9396\u7684\u5be6\u73fe\u76f8\u5c0d\u7c21\u55ae\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u4e0a\u624b\u3002<\/li>\n<li><strong>\u53ef\u64f4\u5c55\u6027\uff1a<\/strong>Redis\u652f\u6301\u5206\u4f48\u5f0f\u9396\uff0c\u9069\u5408\u5927\u898f\u6a21\u7cfb\u7d71\u7684\u9700\u6c42\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8redis%e9%8e%96%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-hVwiTOFUVi\">\u4f7f\u7528Redis\u9396\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136Redis\u9396\u6709\u5f88\u591a\u512a\u52e2\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4e5f\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u9396\u7684\u8d85\u6642\uff1a<\/strong>\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\uff0c\u61c9\u8a72\u8a2d\u7f6e\u9396\u7684\u8d85\u6642\u6642\u9593\uff0c\u78ba\u4fdd\u9396\u4e0d\u6703\u88ab\u6c38\u4e45\u4f54\u7528\u3002<\/li>\n<li><strong>\u9396\u7684\u91cb\u653e\uff1a<\/strong>\u5728\u4f7f\u7528\u9396\u5f8c\uff0c\u5fc5\u9808\u78ba\u4fdd\u9396\u80fd\u5920\u88ab\u6b63\u78ba\u91cb\u653e\uff0c\u5426\u5247\u6703\u5f71\u97ff\u7cfb\u7d71\u7684\u6b63\u5e38\u904b\u884c\u3002<\/li>\n<li><strong>\u552f\u4e00\u6027\uff1a<\/strong>\u5728\u7372\u53d6\u9396\u6642\uff0c\u61c9\u4f7f\u7528\u552f\u4e00\u7684\u6a19\u8b58\u7b26\u4f86\u78ba\u4fdd\u9396\u7684\u6b63\u78ba\u91cb\u653e\u3002<\/li>\n<\/ul>\n<h2 id=\"redis%e9%8e%96%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e6%a1%88%e4%be%8b-hVwiTOFUVi\">Redis\u9396\u7684\u5be6\u969b\u61c9\u7528\u6848\u4f8b<\/h2>\n<p>\u5728\u8a31\u591a\u696d\u52d9\u5834\u666f\u4e2d\uff0cRedis\u9396\u90fd\u767c\u63ee\u4e86\u91cd\u8981\u4f5c\u7528\u3002\u4f8b\u5982\uff0c\u5728\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u4e2d\uff0c\u7576\u7528\u6236\u4e0b\u55ae\u6642\uff0c\u7cfb\u7d71\u9700\u8981\u6aa2\u67e5\u5eab\u5b58\u3002\u5982\u679c\u6c92\u6709\u9396\u7684\u4fdd\u8b77\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u591a\u500b\u7528\u6236\u540c\u6642\u4e0b\u55ae\u5c0e\u81f4\u5eab\u5b58\u8d85\u8ce3\u7684\u60c5\u6cc1\u3002\u901a\u904e\u4f7f\u7528Redis\u9396\uff0c\u53ef\u4ee5\u78ba\u4fdd\u5728\u6aa2\u67e5\u5eab\u5b58\u548c\u66f4\u65b0\u5eab\u5b58\u7684\u904e\u7a0b\u4e2d\uff0c\u53ea\u6709\u4e00\u500b\u8acb\u6c42\u80fd\u5920\u9032\u884c\u64cd\u4f5c\u3002<\/p>\n<pre><code>\nfunction placeOrder(userId, productId) {\n    if (acquireLock(\"order_lock\", userId)) {\n        try {\n            \/\/ \u6aa2\u67e5\u5eab\u5b58\n            if (checkInventory(productId)) {\n                \/\/ \u66f4\u65b0\u5eab\u5b58\n                updateInventory(productId);\n                \/\/ \u5275\u5efa\u8a02\u55ae\n                createOrder(userId, productId);\n            }\n        } finally {\n            releaseLock(\"order_lock\", userId);\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hVwiTOFUVi\">\u7e3d\u7d50<\/h2>\n<p>Redis\u9396\u5728\u4fdd\u8b77\u696d\u52d9\u908f\u8f2f\u548c\u6578\u64da\u4e00\u81f4\u6027\u65b9\u9762\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002\u901a\u904e\u6709\u6548\u5730\u63a7\u5236\u5c0d\u5171\u4eab\u8cc7\u6e90\u7684\u8a2a\u554f\uff0cRedis\u9396\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u907f\u514d\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\u554f\u984c\u3002\u5728\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u6642\uff0c\u8003\u616e\u5230Redis\u9396\u7684\u4f7f\u7528\uff0c\u53ef\u4ee5\u9032\u4e00\u6b65\u63d0\u5347\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u7121\u8ad6\u662f\u5c0d\u65bc <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\u5408\u7406\u5229\u7528Redis\u9396\u90fd\u80fd\u70ba\u696d\u52d9\u5e36\u4f86\u66f4\u5927\u7684\u4fdd\u969c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis\u9396\u4fdd\u8b77\u696d\u52d9\u7684\u8981\u585e\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b89\u5168\u6027\uff0c\u9632\u6b62\u4e26\u767c\u64cd\u4f5c\u5f15\u767c\u7684\u554f\u984c\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\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-129315","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129315","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=129315"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129315\/revisions"}],"predecessor-version":[{"id":129316,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129315\/revisions\/129316"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=129315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=129315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=129315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}