{"id":209883,"date":"2025-10-24T00:44:51","date_gmt":"2025-10-23T16:44:51","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209883\/"},"modified":"2025-10-24T00:44:52","modified_gmt":"2025-10-23T16:44:52","slug":"cdn-175","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209883\/","title":{"rendered":"\u9ad8\u53ef\u7528\u4e3a\u5148\uff1aCDN\u8282\u70b9\u53ef\u9760\u6027\u8bc4\u4f30\u65b9\u6cd5\u5168\u89e3\u6790"},"content":{"rendered":"<p>\u5728\u5168\u7403\u4e92\u8054\u7f51\u670d\u52a1\u4e2d\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u627f\u62c5\u7740\u964d\u4f4e\u5ef6\u8fdf\u3001\u63d0\u9ad8\u5e76\u53d1\u5904\u7406\u80fd\u529b\u548c\u4fdd\u969c\u8bbf\u95ee\u8fde\u7eed\u6027\u7684\u5173\u952e\u89d2\u8272\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u8861\u91cf\u4e00\u4e2aCDN\u8282\u70b9\u7684\u53ef\u9760\u6027\u4e0d\u4ec5\u5173\u7cfb\u5230\u7528\u6237\u4f53\u9a8c\uff0c\u4e5f\u76f4\u63a5\u5f71\u54cd\u4e1a\u52a1\u53ef\u7528\u6027\u4e0e\u6210\u672c\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u3001\u8bc4\u4f30\u65b9\u6cd5\u3001\u5e94\u7528\u573a\u666f\u3001\u4f18\u52bf\u5bf9\u6bd4\u4e0e\u9009\u8d2d\u5efa\u8bae\u51e0\u5927\u65b9\u9762\uff0c\u7cfb\u7edf\u89e3\u6790\u5982\u4f55\u4ee5\u201c\u9ad8\u53ef\u7528\u4e3a\u5148\u201d\u6765\u6784\u5efa\u4e0e\u8bc4\u4f30CDN\u8282\u70b9\u53ef\u9760\u6027\u3002<\/p>\n<h2>\u4e00\u3001CDN\u8282\u70b9\u53ef\u9760\u6027\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>CDN\u8282\u70b9\u53ef\u9760\u6027\u672c\u8d28\u4e0a\u662f\u5bf9\u8282\u70b9\u5728\u5f02\u5e38\u6761\u4ef6\u4e0b\u7ef4\u6301\u670d\u52a1\u80fd\u529b\u7684\u5ea6\u91cf\u3002\u5b83\u5305\u542b\u591a\u4e2a\u7ef4\u5ea6\uff1a\u7f51\u7edc\u8fde\u901a\u6027\u3001\u670d\u52a1\u53ef\u7528\u7387\uff08Availability\uff09\u3001\u54cd\u5e94\u65f6\u95f4\uff08Latency\uff09\u3001\u9519\u8bef\u7387\u3001\u541e\u5410\u91cf\u3001\u4ee5\u53ca\u6062\u590d\u80fd\u529b\uff08Recovery\uff09\u3002\u5728\u6280\u672f\u6808\u5c42\u9762\uff0c\u9700\u8981\u5173\u6ce8\u4ee5\u4e0b\u5173\u952e\u673a\u5236\uff1a<\/p>\n<ul>\n<li><strong>Anycast\u4e0eBGP<\/strong>\uff1a\u7528\u4e8e\u5b9e\u73b0\u8def\u7531\u5c42\u9762\u7684\u6d41\u91cf\u5206\u53d1\u4e0e\u5197\u4f59\u3002Anycast\u80fd\u591f\u8ba9\u6700\u8fd1\u7684\u8fb9\u7f18\u8282\u70b9\u63a5\u6536\u6d41\u91cf\uff0c\u51cf\u5c11\u5ef6\u8fdf\uff1b\u4f46\u5b58\u5728\u8def\u7531\u6536\u655b\u4e0e\u9ed1\u6d1e\u98ce\u9669\uff0c\u8bc4\u4f30\u65f6\u9700\u5173\u6ce8BGP\u6536\u655b\u65f6\u95f4\u4e0e\u591a\u5bbf\u4e3b\u90e8\u7f72\u3002<\/li>\n<li><strong>\u5065\u5eb7\u68c0\u67e5\u4e0e\u6d41\u91cf\u5254\u9664<\/strong>\uff1a\u57fa\u4e8eTCP\/HTTP\u63a2\u6d4b\uff08\u4e3b\u52a8\uff09\u6216\u76d1\u63a7\u544a\u8b66\uff08\u88ab\u52a8\uff09\u5c06\u5f02\u5e38\u8282\u70b9\u4ece\u8d1f\u8f7d\u6c60\u4e2d\u79fb\u9664\uff0c\u907f\u514d\u77ed\u671f\u6545\u969c\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<li><strong>\u7f13\u5b58\u4e00\u81f4\u6027\u4e0e\u539f\u70b9\u56de\u6e90\u7b56\u7565<\/strong>\uff1a\u7f13\u5b58\u547d\u4e2d\u7387\u3001TTL\u7b56\u7565\u3001\u4ee5\u53caorigin 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Ratio\uff09\u4e0e\u5e26\u5bbd\u5229\u7528\u7387<\/strong>\uff1a\u5f71\u54cd\u56de\u6e90\u8d1f\u8f7d\u4e0e\u6210\u672c\u3002<\/li>\n<li><strong>\u6062\u590d\u65f6\u95f4\uff08MTTR\uff09<\/strong>\uff1a\u4ece\u6545\u969c\u5230\u6062\u590d\u7684\u5e73\u5747\u65f6\u95f4\uff0c\u662f\u8861\u91cf\u8fd0\u8425\u80fd\u529b\u7684\u91cd\u8981\u6307\u6807\u3002<\/li>\n<\/ul>\n<h3>\u76d1\u6d4b\u65b9\u6cd5<\/h3>\n<ul>\n<li><strong>\u4e3b\u52a8\u63a2\u6d4b\uff08Synthetic Monitoring\uff09<\/strong>\uff1a\u4ece\u5168\u7403\u6216\u5173\u952e\u533a\u57df\uff08\u4f8b\u5982\uff1a\u9999\u6e2f\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u3001\u7f8e\u56fd\uff09\u5b9a\u65f6\u53d1\u8d77DNS\u3001HTTP\/HTTPS\u3001QUIC\/HTTP3\u8bf7\u6c42\uff0c\u8bb0\u5f55\u5ef6\u8fdf\u3001TTFB\u4e0e\u72b6\u6001\u7801\u3002\u4f18\u70b9\u662f\u53ef\u63a7\u3001\u53ef\u590d\u73b0\uff1b\u7f3a\u70b9\u662f\u8986\u76d6\u53d7\u9650\u3002<\/li>\n<li><strong>\u88ab\u52a8\u76d1\u63a7\uff08Real User Monitoring, RUM\uff09<\/strong>\uff1a\u6536\u96c6\u771f\u5b9e\u7528\u6237\u5728\u4e0d\u540c\u7f51\u7edc\u3001\u4e0d\u540cISP\u4e0b\u7684\u6027\u80fd\u6570\u636e\uff0c\u80fd\u591f\u53cd\u6620\u771f\u5b9e\u4f53\u9a8c\uff0c\u4f46\u53d7\u6d41\u91cf\u5206\u5e03\u5f71\u54cd\u3002<\/li>\n<li><strong>\u7f51\u7edc\u5c42\u63a2\u6d4b\uff08ping\/traceroute\/mtr\uff09<\/strong>\uff1a\u7528\u4e8e\u5b9a\u4f4d\u7f51\u7edc\u8def\u5f84\u95ee\u9898\uff0c\u5206\u6790BGP\u8def\u7531\u3001\u8dc3\u70b9\u3001\u4e22\u5305\u4e0e\u5e26\u5bbd\u74f6\u9888\u3002<\/li>\n<li><strong>\u5408\u6210\u4ea4\u6613\uff08Synthetic Transactions\uff09<\/strong>\uff1a\u6a21\u62df\u5b8c\u6574\u4e1a\u52a1\u6d41\u7a0b\uff08\u4f8b\u5982\u767b\u5f55\u3001\u5546\u54c1\u6d4f\u89c8\u3001\u4e0b\u5355\uff09\uff0c\u7528\u4e8e\u68c0\u6d4b\u5e94\u7528\u5c42\u95ee\u9898\u4e0e\u56de\u6e90\u94fe\u8def\u662f\u5426\u53ef\u9760\u3002<\/li>\n<\/ul>\n<h3>\u8bc4\u4f30\u6d41\u7a0b\u5efa\u8bae<\/h3>\n<ul>\n<li>\u5efa\u7acb\u591a\u5730\u533a\u63a2\u6d4b\u70b9\uff0c\u8986\u76d6\u6e2f\u6fb3\u53f0\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u3001\u7f8e\u56fd\u4e0e\u76ee\u6807\u5e02\u573aISP\u3002<\/li>\n<li>\u540c\u65f6\u91c7\u96c6\u4e3b\u52a8\u63a2\u6d4b\u4e0eRUM\u6570\u636e\uff0c\u8fdb\u884c\u6bd4\u5bf9\u5206\u6790\uff0c\u8bc6\u522b\u201c\u611f\u77e5\u5dee\u5f02\u201d\u3002<\/li>\n<li>\u5efa\u7acbSLO\/SLA\u6620\u5c04\u4e0e\u544a\u8b66\u7b56\u7565\uff0c\u7ed3\u5408\u9519\u8bef\u9884\u7b97\u8bbe\u5b9a\u81ea\u52a8\u5316\u5254\u9664\u6216DNS\u5207\u6362\u89c4\u5219\u3002<\/li>\n<li>\u5bf9\u5e94Anycast\u8282\u70b9\u8fdb\u884cBGP\u6536\u655b\u4e0e\u8def\u7531\u7a33\u5b9a\u6027\u6d4b\u8bd5\uff0c\u8bc4\u4f30\u9ed1\u6d1e\u4e0e\u5206\u7247\u98ce\u9669\u3002<\/li>\n<\/ul>\n<h2>\u4e09\u3001\u5e94\u7528\u573a\u666f\u4e0e\u8282\u70b9\u914d\u7f6e\u8981\u70b9<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u573a\u666f\u5bf9\u8282\u70b9\u53ef\u9760\u6027\u6709\u4e0d\u540c\u8981\u6c42\uff0c\u4e0b\u9762\u5217\u4e3e\u5e38\u89c1\u573a\u666f\u5e76\u63d0\u51fa\u76f8\u5e94\u7684\u8282\u70b9\u914d\u7f6e\u8981\u70b9\u3002<\/p>\n<h3>\u9759\u6001\u5185\u5bb9\u3001\u5a92\u4f53\u5206\u53d1\uff08CDN\u4e3a\u4e3b\uff09<\/h3>\n<ul>\n<li>\u4f18\u5148\u8003\u8651\u5e7f\u57df\u5206\u5e03\u4e0e\u9ad8\u7f13\u5b58\u547d\u4e2d\u7387\uff0c\u4f7f\u7528\u957fTTL\u4e0e\u6309\u9700\u6e05\u7406\u7b56\u7565\u3002<\/li>\n<li>\u542f\u7528origin 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vs DNS \u8d1f\u8f7d\u5206\u914d<\/h2>\n<p>\u5728CDN\u8282\u70b9\u9009\u578b\u4e2d\uff0c\u8def\u7531\u4e0e\u6d41\u91cf\u5206\u914d\u7b56\u7565\u6781\u5927\u5f71\u54cd\u53ef\u9760\u6027\u3002<\/p>\n<ul>\n<li><strong>Anycast\uff08BGP\uff09<\/strong>\uff1a\u4f18\u70b9\u662f\u8def\u7531\u5c42\u9762\u7684\u5feb\u901f\u5206\u53d1\u3001\u5929\u7136\u5197\u4f59\u548c\u7b80\u5316\u5ba2\u6237\u7aef\u611f\u77e5\u3002\u7f3a\u70b9\u662fBGP\u6536\u655b\u65f6\u95f4\u53ef\u80fd\u5bfc\u81f4\u77ed\u6682\u9ed1\u6d1e\uff0c\u4e14\u5bf9\u6d41\u91cf\u5de5\u7a0b\u7684\u7cbe\u7ec6\u63a7\u5236\u8f83\u5f31\u3002<\/li>\n<li><strong>DNS 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<a href=\"https:\/\/server.hk\/\">Server.HK<\/a> \u6216\u76f4\u63a5\u67e5\u770b\u9999\u6e2f\u670d\u52a1\u5668\u4ea7\u54c1\u9875\uff1a<a 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