{"id":185054,"date":"2024-11-10T18:21:17","date_gmt":"2024-11-10T10:21:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185054\/"},"modified":"2024-11-10T18:21:18","modified_gmt":"2024-11-10T10:21:18","slug":"%e4%bd%bf%e7%94%a8redis%e9%8e%96%e5%ae%9a%e8%b3%87%e6%ba%90%e5%af%a6%e7%8f%be%e5%ae%89%e5%85%a8%e4%b8%a6%e7%99%bc%ef%bc%88redis%e9%8e%96%e5%ae%9a%e8%b3%87%e6%ba%90%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185054\/","title":{"rendered":"\u4f7f\u7528Redis\u9396\u5b9a\u8cc7\u6e90\u5be6\u73fe\u5b89\u5168\u4e26\u767c\uff08redis\u9396\u5b9a\u8cc7\u6e90\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8redis%e9%8e%96%e5%ae%9a%e8%b3%87%e6%ba%90%e5%af%a6%e7%8f%be%e5%ae%89%e5%85%a8%e4%b8%a6%e7%99%bc-qqmDCtYpCQ\">\u4f7f\u7528Redis\u9396\u5b9a\u8cc7\u6e90\u5be6\u73fe\u5b89\u5168\u4e26\u767c<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u4e26\u767c\u8655\u7406\u662f\u63d0\u9ad8\u61c9\u7528\u6027\u80fd\u7684\u95dc\u9375\u3002\u7136\u800c\uff0c\u96a8\u8457\u591a\u500b\u9032\u7a0b\u6216\u7dda\u7a0b\u540c\u6642\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u6216\u7af6\u722d\u689d\u4ef6\u7684\u554f\u984c\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\uff0cRedis\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u6548\u7684\u9396\u5b9a\u6a5f\u5236\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u5728\u4e26\u767c\u74b0\u5883\u4e2d\u5b89\u5168\u5730\u7ba1\u7406\u8cc7\u6e90\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e9%8e%96%e5%ae%9a%ef%bc%9f-qqmDCtYpCQ\">\u4ec0\u9ebc\u662fRedis\u9396\u5b9a\uff1f<\/h2>\n<p>Redis\u9396\u5b9a\u662f\u4e00\u7a2e\u7528\u65bc\u63a7\u5236\u5c0d\u5171\u4eab\u8cc7\u6e90\u8a2a\u554f\u7684\u6a5f\u5236\u3002\u5b83\u5141\u8a31\u4e00\u500b\u9032\u7a0b\u5728\u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\u6642\u7372\u5f97\u5c0d\u8cc7\u6e90\u7684\u7368\u4f54\u8a2a\u554f\u6b0a\u9650\uff0c\u5f9e\u800c\u9632\u6b62\u5176\u4ed6\u9032\u7a0b\u540c\u6642\u8a2a\u554f\u8a72\u8cc7\u6e90\u3002\u9019\u7a2e\u9396\u5b9a\u6a5f\u5236\u7279\u5225\u9069\u5408\u65bc\u9700\u8981\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u7684\u5834\u666f\uff0c\u4f8b\u5982\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u5beb\u5165\u64cd\u4f5c\u6642\u3002<\/p>\n<h2 id=\"redis%e9%8e%96%e5%ae%9a%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-qqmDCtYpCQ\">Redis\u9396\u5b9a\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>Redis\u9396\u5b9a\u901a\u5e38\u57fa\u65bcSETNX\u547d\u4ee4\uff08Set if Not eXists\uff09\u4f86\u5be6\u73fe\u3002\u7576\u4e00\u500b\u9032\u7a0b\u9700\u8981\u7372\u53d6\u9396\u6642\uff0c\u5b83\u6703\u5617\u8a66\u8a2d\u7f6e\u4e00\u500b\u7279\u5b9a\u7684\u9375\uff0c\u5982\u679c\u8a72\u9375\u4e0d\u5b58\u5728\uff0c\u5247\u8a2d\u7f6e\u6210\u529f\u4e26\u7372\u5f97\u9396\uff1b\u5982\u679c\u9375\u5df2\u5b58\u5728\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u9032\u7a0b\u6301\u6709\uff0c\u7576\u524d\u9032\u7a0b\u9700\u8981\u7b49\u5f85\u6216\u91cd\u8a66\u3002<\/p>\n<pre><code>SET resource_lock unique_lock_value NX PX 30000\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u78bc\u4e2d\uff0c<code>resource_lock<\/code>\u662f\u9396\u7684\u540d\u7a31\uff0c<code>unique_lock_value<\/code>\u662f\u7576\u524d\u9032\u7a0b\u7684\u552f\u4e00\u6a19\u8b58\uff0c<code>NX<\/code>\u8868\u793a\u53ea\u6709\u5728\u9375\u4e0d\u5b58\u5728\u6642\u624d\u8a2d\u7f6e\uff0c<code>PX 30000<\/code>\u5247\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\u70ba30\u79d2\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u6b7b\u9396\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8redis%e9%8e%96%e5%ae%9a%e7%9a%84%e5%84%aa%e5%8b%a2-qqmDCtYpCQ\">\u4f7f\u7528Redis\u9396\u5b9a\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u9ad8\u6548\u6027\uff1a<\/strong>Redis\u662f\u4e00\u500b\u57fa\u65bc\u5167\u5b58\u7684\u6578\u64da\u5eab\uff0c\u64cd\u4f5c\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u80fd\u5920\u5feb\u901f\u7372\u53d6\u548c\u91cb\u653e\u9396\u3002<\/li>\n<li><strong>\u7c21\u55ae\u6027\uff1a<\/strong>\u4f7f\u7528Redis\u9396\u5b9a\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\u5b9a\uff0c\u9069\u5408\u65bc\u5927\u898f\u6a21\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e7%8f%beredis%e9%8e%96%e5%ae%9a%e7%9a%84%e7%a4%ba%e4%be%8b-qqmDCtYpCQ\">\u5be6\u73feRedis\u9396\u5b9a\u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528Redis\u9396\u5b9a\u7684\u7c21\u55ae\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728Node.js\u4e2d\u5be6\u73fe\uff1a<\/p>\n<pre><code>const redis = require('redis');\nconst client = redis.createClient();\n\nfunction acquireLock(lockKey, uniqueValue, callback) {\n    client.set(lockKey, uniqueValue, 'NX', 'PX', 30000, (err, result) =&gt; {\n        if (err) {\n            return callback(err);\n        }\n        if (result === 'OK') {\n            return callback(null, true); \/\/ \u9396\u5b9a\u6210\u529f\n        }\n        callback(null, false); \/\/ \u9396\u5b9a\u5931\u6557\n    });\n}\n\nfunction releaseLock(lockKey, uniqueValue, callback) {\n    client.eval(`\n        if redis.call(\"get\", KEYS[1]) == ARGV[1] then\n            return redis.call(\"del\", KEYS[1])\n        else\n            return 0\n        end\n    `, 1, lockKey, uniqueValue, (err, result) =&gt; {\n        if (err) {\n            return callback(err);\n        }\n        callback(null, result);\n    });\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c<code>acquireLock<\/code>\u51fd\u6578\u7528\u65bc\u7372\u53d6\u9396\uff0c\u800c<code>releaseLock<\/code>\u51fd\u6578\u7528\u65bc\u91cb\u653e\u9396\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u57f7\u884c\u95dc\u9375\u64cd\u4f5c\u6642\u4e0d\u6703\u6709\u5176\u4ed6\u9032\u7a0b\u5e72\u64fe\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-qqmDCtYpCQ\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136Redis\u9396\u5b9a\u63d0\u4f9b\u4e86\u4e00\u7a2e\u6709\u6548\u7684\u4e26\u767c\u63a7\u5236\u6a5f\u5236\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4ecd\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u9396\u7684\u904e\u671f\u6642\u9593\u5408\u7406\uff0c\u4ee5\u9632\u6b62\u6b7b\u9396\u3002<\/li>\n<li>\u5728\u91cb\u653e\u9396\u6642\uff0c\u5fc5\u9808\u78ba\u8a8d\u7576\u524d\u9032\u7a0b\u662f\u9396\u7684\u64c1\u6709\u8005\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528Redlock\u7b97\u6cd5\u4f86\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\uff0c\u4ee5\u63d0\u9ad8\u53ef\u9760\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-qqmDCtYpCQ\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528Redis\u9396\u5b9a\u8cc7\u6e90\u662f\u4e00\u7a2e\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\u5b89\u5168\u4e26\u767c\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u7684\u5834\u666f\u4e2d\u3002\u901a\u904e\u5408\u7406\u8a2d\u8a08\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u908f\u8f2f\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u7af6\u722d\u689d\u4ef6\u548c\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u4e26\u767c\u8655\u7406\u7684\u61c9\u7528\uff0cRedis\u9396\u5b9a\u7121\u7591\u662f\u4e00\u500b\u503c\u5f97\u8003\u616e\u7684\u89e3\u6c7a\u65b9\u6848\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\u8f15\u9b06\u7ba1\u7406\u60a8\u7684\u61c9\u7528\u548c\u6578\u64da\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u4f7f\u7528Redis\u9396\u5b9a\u8cc7\u6e90\u4ee5\u5be6\u73fe\u5b89\u5168\u4e26\u767c\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\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-185054","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185054","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=185054"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185054\/revisions"}],"predecessor-version":[{"id":185055,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185054\/revisions\/185055"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}