{"id":210391,"date":"2025-10-29T13:49:25","date_gmt":"2025-10-29T05:49:25","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210391\/"},"modified":"2025-10-29T13:49:26","modified_gmt":"2025-10-29T05:49:26","slug":"cdn-391","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210391\/","title":{"rendered":"\u591a\u4e91CDN\u667a\u80fd\u52a0\u901f\uff1a\u8de8\u4e91\u534f\u540c\u4e0e\u81ea\u9002\u5e94\u4f18\u5316"},"content":{"rendered":"<p>\u968f\u7740\u4e92\u8054\u7f51\u5e94\u7528\u7684\u5168\u7403\u5316\u548c\u7528\u6237\u4f53\u9a8c\u8981\u6c42\u7684\u4e0d\u65ad\u63d0\u9ad8\uff0c\u4f20\u7edf\u5355\u4e00\u4e91\u6216\u5355\u4e00 CDN \u6a21\u578b\u5728\u6027\u80fd\u3001\u53ef\u9760\u6027\u548c\u6210\u672c\u63a7\u5236\u65b9\u9762\u9010\u6e10\u663e\u9732\u51fa\u5c40\u9650\u6027\u3002<strong>\u591a\u4e91 CDN 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CDN\uff09\u4e0d\u662f\u7b80\u5355\u5730\u628a\u8d44\u6e90\u5206\u5e03\u5230\u591a\u4e2a\u4e91\u4f9b\u5e94\u5546\u4e0a\uff0c\u800c\u662f\u4e00\u5957\u7531\u63a7\u5236\u9762\u3001\u6570\u636e\u9762\u4e0e\u76d1\u63a7\u9762\u7ec4\u6210\u7684\u534f\u8c03\u7cfb\u7edf\uff0c\u6838\u5fc3\u5728\u4e8e<strong>\u8de8\u4e91\u534f\u540c<\/strong>\u548c<strong>\u81ea\u9002\u5e94\u4f18\u5316<\/strong>\u4e24\u5927\u673a\u5236\u3002<\/p>\n<h3>\u8de8\u4e91\u534f\u540c\uff08Cross-cloud Orchestration\uff09<\/h3>\n<p>\u8de8\u4e91\u534f\u540c\u7684\u76ee\u6807\u662f\u5b9e\u73b0\u4e0d\u540c\u4e91\u4f9b\u5e94\u5546\u4e4b\u95f4\u7684\u7edf\u4e00\u8c03\u5ea6\u4e0e\u8def\u7531\u51b3\u7b56\u3002\u5176\u5173\u952e\u7ec4\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u63a7\u5236\u5e73\u9762\uff08Control Plane\uff09\uff1a\u96c6\u4e2d\u7ba1\u7406\u7b56\u7565\u3001\u5065\u5eb7\u68c0\u6d4b\u3001\u6d41\u91cf\u7b56\u7565\u4e0b\u53d1\u4e0e\u7edf\u8ba1\u6c47\u603b\u3002<\/li>\n<li>\u8def\u7531\u5f15\u64ce\uff08Routing Engine\uff09\uff1a\u57fa\u4e8e\u5b9e\u65f6\u63a2\u6d4b\u3001BGP \u4fe1\u606f\u3001\u7f51\u7edc\u8d28\u91cf\uff08\u5982 RTT\u3001\u4e22\u5305\u7387\u3001\u6296\u52a8\uff09\u6765\u9009\u62e9\u6700\u4f73\u51fa\u53e3\u6216\u8fb9\u7f18\u8282\u70b9\u3002<\/li>\n<li>\u8fb9\u7f18\u8282\u70b9\uff08Edge Nodes\uff09\uff1a\u90e8\u7f72\u5728\u591a\u4e2a\u4e91\u4e0e\u591a\u4e2a\u533a\u57df\u7684\u7f13\u5b58\u8282\u70b9\uff0c\u8d1f\u8d23\u5185\u5bb9\u5206\u53d1\u4e0e\u672c\u5730\u56de\u6e90\u3002<\/li>\n<li>\u7edf\u4e00\u57df\u540d\u89e3\u6790\uff08Global DNS\uff09\uff1a\u901a\u8fc7 GeoDNS \u6216 Anycast \u6280\u672f\uff0c\u5b9e\u73b0\u6839\u636e\u7528\u6237\u4f4d\u7f6e\u4e0e\u7f51\u7edc\u72b6\u51b5\u7684\u667a\u80fd\u89e3\u6790\u3002<\/li>\n<\/ul>\n<p>\u8de8\u4e91\u534f\u540c\u8fd8\u5305\u62ec\u5bf9<strong>\u4e91\u95f4\u79c1\u7f51\u4e92\u8054\uff08Cloud Interconnect\uff09<\/strong>\u548c\u7b2c\u4e09\u65b9\u4f20\u8f93\u7f51\u7edc\uff08\u5982\u4e13\u7ebf\u3001SD-WAN\uff09\u7684\u652f\u6301\uff0c\u4ee5\u964d\u4f4e\u4e91\u95f4\u56de\u6e90\u65f6\u7684\u5ef6\u8fdf\u4e0e\u6210\u672c\u3002<\/p>\n<h3>\u81ea\u9002\u5e94\u4f18\u5316\uff08Adaptive Optimization\uff09<\/h3>\n<p>\u81ea\u9002\u5e94\u4f18\u5316\u4f53\u73b0\u5728\u591a\u5c42\u9762\uff1a\u4f20\u8f93\u5c42\u3001\u5e94\u7528\u5c42\u548c\u7f13\u5b58\u7b56\u7565\u3002<\/p>\n<ul>\n<li>\u4f20\u8f93\u4f18\u5316\uff1a\u4f7f\u7528\u81ea\u9002\u5e94\u62e5\u585e\u63a7\u5236\uff08\u5982 BBR\uff09\u3001QUIC\/HTTP\/3 \u534f\u8bae\u3001TLS \u4f1a\u8bdd\u590d\u7528\u4e0e\u8fde\u63a5\u6c60\u6765\u51cf\u5c11\u63e1\u624b\u5ef6\u8fdf\u4e0e\u63d0\u5347\u4e22\u5305\u73af\u5883\u4e0b\u7684\u541e\u5410\u3002<\/li>\n<li>\u7f13\u5b58\u4e0e\u9884\u53d6\u7b56\u7565\uff1a\u57fa\u4e8e\u8bbf\u95ee\u70ed\u5ea6\u3001\u5185\u5bb9\u7c7b\u578b\u4e0e\u65f6\u6548\u6027\u81ea\u52a8\u8c03\u6574\u7f13\u5b58\u8fc7\u671f\u65f6\u95f4\uff08TTL\uff09\uff0c\u5e76\u5bf9\u70ed\u70b9\u5bf9\u8c61\u8fdb\u884c\u4e3b\u52a8\u9884\u70ed\uff08pre-warm\uff09\u4e0e\u591a\u7ea7\u7f13\u5b58\uff08L1\/L2\uff09\u5206\u5c42\u5b58\u50a8\u3002<\/li>\n<li>\u7f16\u89e3\u7801\u4e0e\u538b\u7f29\uff1a\u5bf9\u9759\u6001\u8d44\u6e90\u8fdb\u884c Brotli\u3001Gzip \u538b\u7f29\uff0c\u5bf9\u56fe\u7247\u4e0e\u89c6\u9891\u505a\u81ea\u52a8\u683c\u5f0f\u8f6c\u6362\uff08\u5982 WebP\u3001AV1\uff09\u4e0e\u5206\u7247\u52a0\u901f\u3002<\/li>\n<li>\u667a\u80fd\u56de\u6e90\u7b56\u7565\uff1a\u5728\u8fb9\u7f18\u7f13\u5b58\u672a\u547d\u4e2d\u65f6\uff0c\u6839\u636e\u6e90\u7ad9\u5065\u5eb7\u5ea6\u9009\u62e9\u5c31\u8fd1\u56de\u6e90\u6216\u591a\u6e90\u56de\u6e90\uff0c\u5b9e\u73b0\u6545\u969c\u5207\u6362\u4e0e\u8d1f\u8f7d\u5747\u8861\u3002<\/li>\n<\/ul>\n<h2>\u6280\u672f\u5b9e\u73b0\u7ec6\u8282<\/h2>\n<p>\u5b9e\u73b0\u4e00\u4e2a\u9ad8\u6548\u7684\u591a\u4e91 CDN\uff0c\u9700\u8981\u89e3\u51b3\u591a\u4e2a\u6280\u672f\u6311\u6218\uff0c\u4ee5\u4e0b\u4e3a\u5173\u952e\u5b9e\u73b0\u7ec6\u8282\uff1a<\/p>\n<h3>\u5b9e\u65f6\u94fe\u8def\u63a2\u6d4b\u4e0e\u8bc4\u5206\u6a21\u578b<\/h3>\n<p>\u8def\u7531\u51b3\u7b56\u4f9d\u8d56\u4e8e\u5bf9\u5404\u8def\u5f84\u7684\u5b9e\u65f6\u8bc4\u4f30\u3002\u5e38\u89c1\u505a\u6cd5\u662f\u90e8\u7f72\u5927\u89c4\u6a21\u4e3b\u52a8\u63a2\u6d4b\uff08ping\u3001HTTP probing\uff09\u4e0e\u88ab\u52a8\u6d4b\u91cf\uff08\u771f\u5b9e\u7528\u6237\u76d1\u6d4b RUM\u3001\u8fb9\u7f18\u8282\u70b9\u65e5\u5fd7\uff09\uff0c\u5e76\u7ed3\u5408 BGP \u8def\u7531\u53d8\u66f4\u4fe1\u606f\u5f62\u6210\u8bc4\u5206\u6a21\u578b\uff1a<\/p>\n<ul>\n<li>\u5ef6\u8fdf\u5206\u6570\uff08Latency Score\uff09\uff1a\u52a0\u6743\u5e73\u5747 RTT\uff0c\u8003\u8651\u6700\u5c0f RTT\u300195% RTT \u7b49\u5206\u4f4d\u6570\u3002<\/li>\n<li>\u7a33\u5b9a\u6027\u5206\u6570\uff08Stability Score\uff09\uff1a\u4e22\u5305\u7387\u3001\u6296\u52a8\u4e0e\u77ed\u65f6\u6296\u52a8\u6ce2\u52a8\u3002<\/li>\n<li>\u6210\u672c\u5206\u6570\uff08Cost Score\uff09\uff1a\u5e26\u5bbd\u6216\u56de\u6e90\u8d39\u7528\uff0c\u4ee5\u4fbf\u5728 QoS \u6ee1\u8db3\u7684\u524d\u63d0\u4e0b\u4f18\u5316\u6210\u672c\u3002<\/li>\n<\/ul>\n<p>\u8bc4\u5206\u6a21\u578b\u53ef\u91c7\u7528\u591a\u6307\u6807\u5f52\u4e00\u5316\u540e\u52a0\u6743\u6c42\u548c\uff0c\u5e76\u7ed3\u5408\u673a\u5668\u5b66\u4e60\u8fdb\u884c\u5386\u53f2\u8d8b\u52bf\u9884\u6d4b\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u667a\u80fd\u7684\u8def\u7531\u9009\u62e9\u3002<\/p>\n<h3>\u8de8\u4e91\u7f13\u5b58\u4e00\u81f4\u6027\u4e0e\u56de\u6e90\u7b56\u7565<\/h3>\n<p>\u5728\u8de8\u4e91\u90e8\u7f72\u4e2d\uff0c\u5982\u4f55\u4fdd\u8bc1\u7f13\u5b58\u4e00\u81f4\u6027\u4e0e\u964d\u4f4e\u56de\u6e90\u538b\u529b\u662f\u5173\u952e\u3002\u5e38\u89c1\u7b56\u7565\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u57fa\u4e8e\u5185\u5bb9\u7248\u672c\u7684\u7f13\u5b58\u952e\uff08Versioned Keys\uff09\uff1a\u901a\u8fc7\u6587\u4ef6\u540d\u6216 URL \u53c2\u6570\u5b9e\u73b0\u5f3a\u7f13\u5b58\u65e0\u6548\u5316\u3002<\/li>\n<li>\u591a\u7ea7\u56de\u6e90\uff08Edge \u2192 Regional \u2192 Origin\uff09\uff1a\u4f18\u5148\u56de\u6e90\u5230\u540c\u4e91\u7684\u533a\u57df\u8282\u70b9\uff0c\u53ea\u6709\u5728\u533a\u57df\u8282\u70b9\u4e5f\u672a\u547d\u4e2d\u65f6\u518d\u8de8\u4e91\u56de\u6e90\uff0c\u51cf\u5c11\u8de8\u4e91\u6d41\u91cf\u3002<\/li>\n<li>\u6309\u9700\u62c9\u53d6\u4e0e\u4e3b\u52a8\u540c\u6b65\uff1a\u5bf9\u9759\u6001\u5927\u6587\u4ef6\u6216\u70ed\u70b9\u5bf9\u8c61\uff0c\u53ef\u901a\u8fc7\u540c\u6b65\u673a\u5236\u5728\u5404\u4e91\u4e4b\u95f4\u4e3b\u52a8\u590d\u5236\uff0c\u4ee5\u51cf\u5c11\u9996\u6b21\u56de\u6e90\u5ef6\u65f6\u3002<\/li>\n<\/ul>\n<h3>\u5b89\u5168\u4e0e\u5408\u89c4<\/h3>\n<p>\u591a\u4e91\u73af\u5883\u5f15\u5165\u66f4\u591a\u653b\u51fb\u9762\uff0c\u56e0\u6b64\u5b89\u5168\u67b6\u6784\u9700\u8986\u76d6\uff1a<\/p>\n<ul>\n<li>DDoS \u7f13\u89e3\u4e0e\u6d41\u91cf\u6e05\u6d17\u5728\u8fb9\u7f18\u5c42\u8fdb\u884c\u5206\u5e03\u5f0f\u9632\u62a4\u3002<\/li>\n<li>\u7edf\u4e00\u8eab\u4efd\u4e0e\u8bbf\u95ee\u63a7\u5236\uff08IAM\uff09\uff0c\u4fdd\u8bc1\u5404\u4e91 API \u7684\u6700\u5c0f\u6743\u9650\u3002<\/li>\n<li>\u5408\u89c4\u7b56\u7565\uff08\u5982\u6570\u636e\u4e3b\u6743\uff09\u901a\u8fc7\u6d41\u91cf\u6807\u8bb0\u4e0e\u5730\u57df\u7b56\u7565\u4fdd\u8bc1\u654f\u611f\u6570\u636e\u56de\u6e90\u6216\u5b58\u50a8\u5728\u6307\u5b9a\u6cd5\u57df\uff08\u4f8b\u5982\u90e8\u7f72\u5230\u9999\u6e2f\u670d\u52a1\u5668\u6216\u65b0\u52a0\u5761\u670d\u52a1\u5668\u4ee5\u6ee1\u8db3\u5730\u533a\u5408\u89c4\uff09\u3002<\/li>\n<\/ul>\n<h2>\u5178\u578b\u5e94\u7528\u573a\u666f<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u6709\u4e0d\u540c\u7684\u6027\u80fd\u4e0e\u5408\u89c4\u9700\u6c42\uff0c\u591a\u4e91 CDN 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