{"id":163465,"date":"2024-11-04T23:44:22","date_gmt":"2024-11-04T15:44:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163465\/"},"modified":"2024-11-04T23:44:23","modified_gmt":"2024-11-04T15:44:23","slug":"%e8%a7%a3%e6%b1%baredis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%e7%9a%84%e6%9c%89%e6%95%88%e6%96%b9%e6%a1%88%ef%bc%88redis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%e6%80%8e%e9%ba%bc%e8%be%a6%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163465\/","title":{"rendered":"\u89e3\u6c7aRedis\u7de9\u5b58\u64ca\u7a7f\u7684\u6709\u6548\u65b9\u6848\uff08redis\u7de9\u5b58\u64ca\u7a7f\u600e\u9ebc\u8fa6\uff09"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%b1%baredis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%e7%9a%84%e6%9c%89%e6%95%88%e6%96%b9%e6%a1%88-JvtPPLqdvv\">\u89e3\u6c7aRedis\u7de9\u5b58\u64ca\u7a7f\u7684\u6709\u6548\u65b9\u6848<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u7db2\u7d61\u61c9\u7528\u4e2d\uff0cRedis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u7de9\u5b58\u89e3\u6c7a\u65b9\u6848\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u3002\u7136\u800c\uff0c\u96a8\u8457\u7528\u6236\u91cf\u7684\u589e\u52a0\uff0cRedis\u7de9\u5b58\u64ca\u7a7f\u7684\u554f\u984c\u4e5f\u65e5\u76ca\u51f8\u986f\u3002\u672c\u6587\u5c07\u63a2\u8a0eRedis\u7de9\u5b58\u64ca\u7a7f\u7684\u6982\u5ff5\u3001\u6210\u56e0\u53ca\u5176\u6709\u6548\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e7%b7%a9%e5%ad%98%e6%93%8a%e7%a9%bf%ef%bc%9f-JvtPPLqdvv\">\u4ec0\u9ebc\u662fRedis\u7de9\u5b58\u64ca\u7a7f\uff1f<\/h2>\n<p>Redis\u7de9\u5b58\u64ca\u7a7f\u662f\u6307\u5728\u9ad8\u4f75\u767c\u7684\u60c5\u6cc1\u4e0b\uff0c\u67d0\u4e9b\u7279\u5b9a\u7684key\u5728Redis\u4e2d\u4e0d\u5b58\u5728\uff0c\u5c0e\u81f4\u5927\u91cf\u8acb\u6c42\u76f4\u63a5\u6253\u5230\u5f8c\u7aef\u6578\u64da\u5eab\uff0c\u5f9e\u800c\u9020\u6210\u6578\u64da\u5eab\u7684\u58d3\u529b\u6fc0\u589e\uff0c\u751a\u81f3\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u5eab\u5d29\u6f70\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u67d0\u4e9b\u71b1\u9580\u6578\u64da\u7684key\u904e\u671f\u6216\u88ab\u522a\u9664\u6642\u3002<\/p>\n<h2 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id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-JvtPPLqdvv\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u70ba\u4e86\u6709\u6548\u89e3\u6c7aRedis\u7de9\u5b58\u64ca\u7a7f\u554f\u984c\uff0c\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e4%ba%92%e6%96%a5%e9%8e%96-JvtPPLqdvv\">1. \u4f7f\u7528\u4e92\u65a5\u9396<\/h3>\n<p>\u5728\u8acb\u6c42\u5230\u9054\u6642\uff0c\u5c0d\u65bc\u4e0d\u5b58\u5728\u7684key\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e92\u65a5\u9396\u4f86\u63a7\u5236\u8acb\u6c42\u7684\u6d41\u91cf\u3002\u5177\u9ad4\u5be6\u73fe\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>if (redis.exists(key)) {\n    \/\/ \u5f9e\u7de9\u5b58\u4e2d\u7372\u53d6\u6578\u64da\n} else {\n    \/\/ \u7372\u53d6\u9396\n    if (acquireLock(key)) {\n        \/\/ \u5f9e\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u6578\u64da\n        data = queryDatabase(key);\n        \/\/ \u66f4\u65b0\u7de9\u5b58\n        redis.set(key, data);\n        \/\/ \u91cb\u653e\u9396\n        releaseLock(key);\n    } else {\n        \/\/ \u7b49\u5f85\u4e26\u91cd\u8a66\n        waitAndRetry(key);\n    }\n}<\/code><\/pre>\n<h3 id=\"2-%e8%a8%ad%e7%bd%ae%e5%90%88%e7%90%86%e7%9a%84%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93-JvtPPLqdvv\">2. \u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593<\/h3>\n<p>\u5c0d\u65bc\u71b1\u9580\u6578\u64da\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u4e00\u500b\u5408\u7406\u7684\u904e\u671f\u6642\u9593\uff0c\u907f\u514d\u5728\u9ad8\u4f75\u767c\u60c5\u6cc1\u4e0b\u51fa\u73fe\u7de9\u5b58\u64ca\u7a7f\u3002\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u96a8\u6a5f\u904e\u671f\u6642\u9593\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u540c\u4e00\u6642\u9593\u5167\u5927\u91cfkey\u904e\u671f\u7684\u60c5\u6cc1\u3002<\/p>\n<h3 id=\"3-%e7%86%94%e6%96%b7%e6%a9%9f%e5%88%b6-JvtPPLqdvv\">3. 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id=\"%e7%b5%90%e8%ab%96-JvtPPLqdvv\">\u7d50\u8ad6<\/h2>\n<p>Redis\u7de9\u5b58\u64ca\u7a7f\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u4f46\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u7b56\u7565\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u5176\u5c0d\u7cfb\u7d71\u6027\u80fd\u7684\u5f71\u97ff\u3002\u4f7f\u7528\u4e92\u65a5\u9396\u3001\u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593\u3001\u7194\u65b7\u6a5f\u5236\u4ee5\u53ca\u9810\u71b1\u7b56\u7565\u7b49\u65b9\u6cd5\uff0c\u90fd\u662f\u89e3\u6c7a\u6b64\u554f\u984c\u7684\u6709\u6548\u65b9\u6848\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> 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