{"id":209953,"date":"2025-10-24T01:55:32","date_gmt":"2025-10-23T17:55:32","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209953\/"},"modified":"2025-10-24T01:55:33","modified_gmt":"2025-10-23T17:55:33","slug":"cdn-210","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209953\/","title":{"rendered":"CDN\u6027\u80fd\u76d1\u63a7\u6307\u6807\u8be6\u89e3\uff1a\u6838\u5fc3\u6307\u6807\u4e0e\u4f18\u5316\u5b9e\u8df5"},"content":{"rendered":"<p>\u5728\u5168\u7403\u5316\u7f51\u7edc\u670d\u52a1\u4e0e\u5185\u5bb9\u5206\u53d1\u7684\u65f6\u4ee3\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u5df2\u6210\u4e3a\u63d0\u9ad8\u7f51\u7ad9\u6027\u80fd\u3001\u7528\u6237\u4f53\u9a8c\u4e0e\u53ef\u9760\u6027\u7684\u5173\u952e\u7ec4\u4ef6\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u4e86\u89e3\u5e76\u6301\u7eed\u76d1\u63a7CDN\u7684\u6027\u80fd\u6307\u6807\uff0c\u4e0d\u4ec5\u80fd\u53d1\u73b0\u74f6\u9888\uff0c\u8fd8\u80fd\u6307\u5bfc\u7f13\u5b58\u7b56\u7565\u3001\u9009\u5740\u51b3\u7b56\u4e0e\u6210\u672c\u4f18\u5316\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u5230\u5b9e\u8df5\uff0c\u8be6\u89e3\u4e00\u5957\u5b8c\u6574\u7684CDN\u6027\u80fd\u76d1\u63a7\u6307\u6807\u4f53\u7cfb\uff0c\u5e76\u7ed9\u51fa\u53ef\u64cd\u4f5c\u7684\u4f18\u5316\u5efa\u8bae\u548c\u9009\u8d2d\u53c2\u8003\u3002<\/p>\n<h2>CDN\u6027\u80fd\u76d1\u63a7\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>CDN\u7684\u6838\u5fc3\u601d\u60f3\u662f\u901a\u8fc7\u5206\u5e03\u5f0f\u7684\u8fb9\u7f18\u8282\u70b9\uff08POP\uff09\u628a\u9759\u6001\u6216\u52a8\u6001\u5185\u5bb9\u7f13\u5b58\u5728\u9760\u8fd1\u7528\u6237\u7684\u4f4d\u7f6e\uff0c\u4ece\u800c\u51cf\u5c11\u56de\u6e90\u8bf7\u6c42\u3001\u964d\u4f4e\u7f51\u7edc\u4f20\u8f93\u65f6\u5ef6\u5e76\u63d0\u9ad8\u5e76\u53d1\u541e\u5410\u80fd\u529b\u3002\u8981\u8bc4\u4f30CDN\u6548\u679c\uff0c\u9700\u8981\u4ece\u4e24\u7c7b\u6570\u636e\u5165\u624b\uff1a\u4e00\u7c7b\u662f\u5408\u6210\u76d1\u6d4b\uff08Synthetic Monitoring\uff09\uff0c\u901a\u8fc7\u9884\u8bbe\u63a2\u6d4b\u70b9\u5468\u671f\u6027\u8bbf\u95ee\u68c0\u6d4b\u54cd\u5e94\uff1b\u53e6\u4e00\u7c7b\u662f\u771f\u5b9e\u7528\u6237\u76d1\u6d4b\uff08Real User Monitoring\uff0cRUM\uff09\uff0c\u57fa\u4e8e\u771f\u5b9e\u8bbf\u95ee\u91c7\u96c6\u9875\u9762\u52a0\u8f7d\u65f6\u95f4\u3001\u8d44\u6e90\u8017\u65f6\u7b49\u6307\u6807\u3002\u4e8c\u8005\u4e92\u8865\uff1a\u5408\u6210\u76d1\u6d4b\u4fbf\u4e8e\u63d0\u524d\u53d1\u73b0\u95ee\u9898\uff0cRUM\u5219\u53cd\u6620\u771f\u5b9e\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<h2>\u6838\u5fc3\u6027\u80fd\u6307\u6807\u8be6\u89e3<\/h2>\n<h3>1. \u7f13\u5b58\u547d\u4e2d\u7387\uff08Cache Hit Ratio\uff09<\/h3>\n<p>\u7f13\u5b58\u547d\u4e2d\u7387\u662f\u8861\u91cfCDN\u662f\u5426\u6210\u529f\u5728\u8fb9\u7f18\u8282\u70b9\u76f4\u63a5\u54cd\u5e94\u8bf7\u6c42\u7684\u5173\u952e\u6307\u6807\uff0c\u901a\u5e38\u4ee5\u547d\u4e2d\u8bf7\u6c42\u6570\u5360\u603b\u8bf7\u6c42\u6570\u7684\u767e\u5206\u6bd4\u8868\u793a\u3002<strong>\u9ad8\u547d\u4e2d\u7387\u610f\u5473\u7740\u66f4\u5c11\u7684\u56de\u6e90\u6d41\u91cf\u3001\u66f4\u4f4e\u7684\u5ef6\u8fdf\u548c\u66f4\u5c11\u7684\u6e90\u7ad9\u8d1f\u8f7d<\/strong>\u3002\u5f71\u54cd\u56e0\u7d20\u5305\u62ec\u7f13\u5b58\u7b56\u7565\uff08Cache-Control\u3001Expires\u3001Vary\uff09\u3001\u8d44\u6e90\u7684\u53ef\u7f13\u5b58\u6027\uff08\u52a8\u6001\u5185\u5bb9 vs \u9759\u6001\u5185\u5bb9\uff09\u3001URL\u53c2\u6570\u548cCookie\u7b56\u7565\u3002<\/p>\n<ul>\n<li>\u76d1\u63a7\u9879\uff1a\u6309\u8def\u5f84\/\u8d44\u6e90\u7c7b\u578b\/\u56fd\u5bb6\/\u8fd0\u8425\u5546\u5206\u7ec4\u7684\u547d\u4e2d\u7387\u3002<\/li>\n<li>\u4f18\u5316\u5efa\u8bae\uff1a\u5408\u7406\u8bbe\u7f6eCache-Control\uff08max-age\u3001s-maxage\uff09\u3001\u5229\u7528CDN\u7684\u8fb9\u7f18\u7f13\u5b58\u89c4\u5219\u3001\u5bf9\u5e26\u53c2\u6570\u7684URL\u505a\u7f13\u5b58\u952e\u89c4\u8303\u5316\u3002<\/li>\n<\/ul>\n<h3>2. \u9996\u5b57\u8282\u65f6\u95f4\uff08TTFB, Time To First Byte\uff09<\/h3>\n<p>TTFB\u8861\u91cf\u4ece\u5ba2\u6237\u7aef\u53d1\u8d77\u8bf7\u6c42\u5230\u63a5\u6536\u5230\u7b2c\u4e00\u4e2a\u5b57\u8282\u54cd\u5e94\u7684\u65f6\u95f4\uff0c\u5305\u62ecDNS\u89e3\u6790\u3001TCP\/TLS\u63e1\u624b\u548c\u670d\u52a1\u5668\u54cd\u5e94\u65f6\u95f4\u3002\u5bf9\u4e8e\u9759\u6001\u8d44\u6e90\uff0cTTFB\u4e3b\u8981\u53d6\u51b3\u4e8e\u8fb9\u7f18\u8282\u70b9\u7f51\u7edc\u548c\u7f13\u5b58\u6027\u80fd\uff1b\u5bf9\u4e8e\u56de\u6e90\u8bf7\u6c42\uff0c\u6e90\u7ad9\u54cd\u5e94\u65f6\u95f4\u5c06\u663e\u8457\u5f71\u54cdTTFB\u3002<\/p>\n<ul>\n<li>\u76d1\u63a7\u9879\uff1a\u6309\u5730\u57df\uff08\u9999\u6e2f\u3001\u7f8e\u56fd\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u7b49\uff09\u548c\u7f51\u7edc\u8fd0\u8425\u5546\u7684TTFB\u5206\u5e03\u3002<\/li>\n<li>\u4f18\u5316\u5efa\u8bae\uff1a\u5728\u7528\u6237\u5bc6\u96c6\u7684\u533a\u57df\u90e8\u7f72\u76f8\u5e94POP\uff08\u6bd4\u5982\u9999\u6e2f\u6216\u65b0\u52a0\u5761\uff09\uff0c\u4f18\u5316\u6e90\u7ad9\u54cd\u5e94\u3001\u5f00\u542fKeep-Alive\u3001\u542f\u7528HTTP\/2\u6216QUIC\u4ee5\u51cf\u5c11\u63e1\u624b\u5f00\u9500\u3002<\/li>\n<\/ul>\n<h3>3. \u9875\u9762\u52a0\u8f7d\u65f6\u95f4\u4e0e\u5173\u952e\u6307\u6807\uff08PLT\u3001FP\u3001FCP\u3001LCP\u3001CLS\uff09<\/h3>\n<p>\u524d\u7aef\u6027\u80fd\u6307\u6807\u5bf9\u6700\u7ec8\u7528\u6237\u4f53\u9a8c\u975e\u5e38\u5173\u952e\u3002RUM\u53ef\u91c7\u96c6First Paint (FP)\u3001First Contentful Paint (FCP)\u3001Largest Contentful Paint (LCP)\u548cCumulative Layout Shift (CLS)\u7b49\u3002<\/p>\n<ul>\n<li>\u76d1\u63a7\u9879\uff1a\u4e0d\u540c\u5730\u57df\u548c\u8bbe\u5907\u4e0a\u7684LCP\/FCP\u5206\u5e03\uff0c\u7528\u4e8e\u5224\u65ad\u8d44\u6e90\u52a0\u8f7d\u7684\u74f6\u9888\u662f\u5426\u5728\u7f51\u7edc\u4f20\u8f93\u6216\u5ba2\u6237\u7aef\u89e3\u6790\u3002<\/li>\n<li>\u4f18\u5316\u5efa\u8bae\uff1a\u628a\u5173\u952e\u8d44\u6e90\uff08CSS\u3001\u5173\u952e\u56fe\u7247\uff09\u653e\u5230\u8fb9\u7f18\u5e76\u542f\u7528\u538b\u7f29\uff08gzip\/brotli\uff09\uff0c\u5bf9\u56fe\u7247\u4f7f\u7528\u73b0\u4ee3\u683c\u5f0f\uff08WebP\u3001AVIF\uff09\u5e76\u7ed3\u5408CDN\u7684\u56fe\u7247\u5904\u7406\u80fd\u529b\u3002<\/li>\n<\/ul>\n<h3>4. \u5e26\u5bbd\u4e0e\u541e\u5410\uff08Throughput\uff09<\/h3>\n<p>\u5e26\u5bbd\u6d88\u8017\u4e0e\u6bcf\u79d2\u8bf7\u6c42\u6570\uff08RPS\uff09\u662f\u8861\u91cfCDN\u5bb9\u91cf\u4e0e\u8d39\u7528\u7684\u6838\u5fc3\u6307\u6807\u3002\u5bf9\u4e8e\u89c6\u9891\u3001\u6587\u4ef6\u4e0b\u8f7d\u6216\u9ad8\u5e76\u53d1API\uff0c\u541e\u5410\u76f4\u63a5\u5f71\u54cd\u670d\u52a1\u53ef\u7528\u6027\u3002<\/p>\n<ul>\n<li>\u76d1\u63a7\u9879\uff1a\u5cf0\u503c\u5e26\u5bbd\u3001\u5e73\u5747\u5e26\u5bbd\u3001\u6bcf\u4e2aPOP\u7684\u6d41\u91cf\u8d8b\u52bf\u3002<\/li>\n<li>\u4f18\u5316\u5efa\u8bae\uff1a\u901a\u8fc7\u7f13\u5b58\u3001\u5206\u6bb5\u4f20\u8f93\u3001\u4f7f\u7528\u5408\u9002\u7684\u538b\u7f29\u4e0e\u5206\u8fa8\u7387\u81ea\u9002\u5e94\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u5e26\u5bbd\u6d88\u8017\u3002<\/li>\n<\/ul>\n<h3>5. \u9519\u8bef\u7387\u4e0e\u53ef\u7528\u6027\uff084xx\/5xx\u3001SLA\uff09<\/h3>\n<p>\u9519\u8bef\u7387\u76f4\u63a5\u53cd\u6620CDN\u6216\u6e90\u7ad9\u7684\u7a33\u5b9a\u6027\u3002\u5e38\u89c1\u95ee\u9898\u5305\u62ec\u8fb9\u7f18\u8282\u70b9\u6545\u969c\u3001\u56de\u6e90\u5931\u8d25\u3001\u8bc1\u4e66\u95ee\u9898\u3001\u914d\u7f6e\u9519\u8bef\u7b49\u3002<\/p>\n<ul>\n<li>\u76d1\u63a7\u9879\uff1a4xx\/5xx\u9519\u8bef\u6309\u8d44\u6e90\u3001POP\u3001\u65f6\u95f4\u7a97\u53e3\u7edf\u8ba1\uff1b\u5065\u5eb7\u68c0\u67e5\u6210\u529f\u7387\uff1bTLS\u63e1\u624b\u5931\u8d25\u7387\u3002<\/li>\n<li>\u4f18\u5316\u5efa\u8bae\uff1a\u542f\u7528\u591a\u6e90\u7ad9\u90e8\u7f72\uff08\u8de8\u533a\u57df\u5982\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u5197\u4f59\uff09\uff0c\u914d\u7f6e\u81ea\u52a8\u6545\u969c\u5207\u6362\u3001\u914d\u7f6e\u5408\u7406\u7684\u91cd\u8bd5\u4e0e\u9650\u6d41\u7b56\u7565\u3002<\/li>\n<\/ul>\n<h3>6. DNS \u4e0e\u89e3\u6790\u65f6\u95f4<\/h3>\n<p>DNS\u89e3\u6790\u65f6\u95f4\u5f71\u54cd\u9996\u6b21\u8fde\u63a5\u5ef6\u8fdf\u3002CDN\u901a\u5e38\u8981\u6c42\u5feb\u901f\u3001\u5168\u7403\u5206\u5e03\u7684DNS\u89e3\u6790\u670d\u52a1\u3002\u5bf9\u4e8e\u4f7f\u7528\u81ea\u6709\u57df\u540d\uff08\u5982\u7ad9\u957f\u5e38\u89c1\u7684\u57df\u540d\u6ce8\u518c\u540e\u914d\u7f6e\uff09\uff0c\u9700\u8981\u4f18\u5316DNS TTL\u4e0e\u4f7f\u7528Anycast\u89e3\u6790\u3002<\/p>\n<ul>\n<li>\u76d1\u63a7\u9879\uff1aDNS\u89e3\u6790\u65f6\u95f4\u548c\u5931\u8d25\u7387\u3002<\/li>\n<li>\u4f18\u5316\u5efa\u8bae\uff1a\u4f7f\u7528\u6258\u7ba1DNS\u6216CDN\u63d0\u4f9b\u7684DNS\uff0c\u51cf\u5c11TTL\u8fc7\u77ed\u5e26\u6765\u7684\u989d\u5916\u67e5\u8be2\u538b\u529b\u3002<\/li>\n<\/ul>\n<h3>7. 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stapling\u3001\u81ea\u52a8\u8bc1\u4e66\u7eed\u671f\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u6307\u6807\u4fa7\u91cd<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u573a\u666f\u5bf9\u6307\u6807\u7684\u4fa7\u91cd\u70b9\u4e0d\u540c\uff1a<\/p>\n<ul>\n<li>\u9759\u6001\u7f51\u7ad9\u6216\u5a92\u4f53\u5206\u53d1\uff1a\u5173\u6ce8\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u5e26\u5bbd\u3001\u5cf0\u503c\u541e\u5410\uff1b\u5730\u7406\u8986\u76d6\u4f18\u5148\uff08\u9999\u6e2fVPS\u6216\u65b0\u52a0\u5761\u8282\u70b9\u5bf9\u4e9a\u592a\u7528\u6237\u53cb\u597d\uff09\u3002<\/li>\n<li>\u7535\u5546\u4e0e\u52a8\u6001\u9875\u9762\uff1a\u5173\u6ce8TTFB\u3001\u56de\u6e90\u5ef6\u8fdf\u4e0e\u9519\u8bef\u7387\uff1b\u591a\u5730\u6e90\u7ad9\uff08\u9999\u6e2f\u670d\u52a1\u5668+\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u4e0e\u667a\u80fd\u8def\u7531\u6709\u52a9\u4e8e\u9ad8\u53ef\u7528\u3002<\/li>\n<li>API\u4e0e\u5b9e\u65f6\u670d\u52a1\uff1a\u5173\u6ce8RPS\u3001\u5ef6\u8fdf\u5206\u5e03\u4e0eTLS\u63e1\u624b\u4f18\u5316\uff1b\u8003\u8651\u4f7f\u7528\u8fb9\u7f18\u8ba1\u7b97\u80fd\u529b\u51cf\u5c11\u56de\u6e90\u3002<\/li>\n<li>\u5168\u7403\u5316\u4e1a\u52a1\uff1a\u9700\u8981\u6d4b\u91cf\u5404\u533a\u57dfRUM\u6307\u6807\uff08\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u7f8e\u56fdVPS\u8986\u76d6\u7684\u7f8e\u56fd\u7528\u6237\u4f53\u9a8c\uff09\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\u4e0e\u9009\u578b\u8003\u91cf<\/h2>\n<p>\u5728\u9009\u62e9CDN\u6216\u914d\u5957\u7684\u6d77\u5916\u670d\u52a1\u5668\/VPS\u65f6\uff0c\u5e94\u7efc\u5408\u8003\u8651\u4e0b\u5217\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li>\u5730\u7406\u8986\u76d6\uff1a\u76ee\u6807\u7528\u6237\u5728\u54ea\u4e9b\u56fd\u5bb6\uff08\u4f8b\u5982\u9999\u6e2f\u3001\u65b0\u52a0\u5761\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u7f8e\u56fd\uff09\uff1f\u9009\u6709\u5bf9\u5e94POP\u7684CDN\u66f4\u6709\u5229\u3002<\/li>\n<li>\u6027\u80fd\u4e0e\u7a33\u5b9a\u6027\uff1a\u67e5\u770b\u5386\u53f2RUM\u6570\u636e\u6216\u7b2c\u4e09\u65b9\u57fa\u51c6\u6d4b\u8bd5\u62a5\u544a\uff1b\u5173\u6ce8SLA\u4e0e\u9519\u8bef\u7387\u3002<\/li>\n<li>\u7f13\u5b58\u80fd\u529b\u4e0e\u89c4\u5219\u7075\u6d3b\u6027\uff1a\u662f\u5426\u652f\u6301\u81ea\u5b9a\u4e49\u7f13\u5b58\u7b56\u7565\u3001\u8fb9\u7f18\u811a\u672c\uff08Edge 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Server.HK \u7684\u4ea7\u54c1\u9875\uff1a<a href=\"https:\/\/server.hk\/server.php\" target=\"_blank\" rel=\"noopener\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\uff0c\u4ee5\u53ca\u7ad9\u70b9\u4e3b\u9875\uff1a<a href=\"https:\/\/server.hk\/\" target=\"_blank\" rel=\"noopener\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1CDN\u6027\u80fd\u76d1\u63a7\u6307\u6807\u662f\u63d0\u5347\u7f51\u7ad9\u54cd\u5e94\u901f\u5ea6\u3001\u7a33\u5b9a\u6027\u4e0e\u6210\u672c\u6548\u7387\u7684\u7b2c\u4e00\u6b65\u3002\u672c\u6587\u4ece\u539f\u7406\u5230\u5b9e\u8df5\uff0c\u7cfb\u7edf\u89e3\u6790\u6838\u5fc3\u76d1\u63a7\u9879\u5e76\u63d0\u4f9b\u53ef\u64cd\u4f5c\u7684\u4f18\u5316\u4e0e\u9009\u8d2d\u5efa\u8bae\uff0c\u5e2e\u52a9\u7ad9\u957f\u548c\u5f00\u53d1\u8005\u5feb\u901f\u5b9a\u4f4d\u74f6\u9888\u5e76\u505a\u51fa\u660e\u667a\u51b3\u7b56\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4928],"tags":[4036,3788,4042,4040,4038,4037,4039,4041,2141],"class_list":{"0":"post-209953","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-4928","7":"tag-cdn","10":"tag-4040","11":"tag-4038","12":"tag-4037","13":"tag-4039","14":"tag-rum","15":"tag-2141"},"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/209953","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=209953"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/209953\/revisions"}],"predecessor-version":[{"id":209954,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/209953\/revisions\/209954"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=209953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=209953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=209953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}