{"id":209867,"date":"2025-10-24T00:28:27","date_gmt":"2025-10-23T16:28:27","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209867\/"},"modified":"2025-10-24T00:28:28","modified_gmt":"2025-10-23T16:28:28","slug":"cdn-167","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209867\/","title":{"rendered":"\u5b9e\u6d4b\u63ed\u79d8\uff1aCDN\u667a\u80fd\u8c03\u5ea6\u80fd\u529b\uff0c\u8c01\u66f4\u7a33\u66f4\u5feb\uff1f"},"content":{"rendered":"<p>\u968f\u7740\u7f51\u7ad9\u548c\u5e94\u7528\u5bf9\u54cd\u5e94\u901f\u5ea6\u4e0e\u53ef\u7528\u6027\u8981\u6c42\u4e0d\u65ad\u63d0\u9ad8\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u7684\u667a\u80fd\u8c03\u5ea6\u80fd\u529b\u6210\u4e3a\u8861\u91cf\u670d\u52a1\u8d28\u91cf\u7684\u5173\u952e\u6307\u6807\u3002\u7ad9\u957f\u3001\u4f01\u4e1a\u3001\u5f00\u53d1\u8005\u5728\u9009\u62e9\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u6d77\u5916\u670d\u52a1\u5668\u90e8\u7f72\u4e1a\u52a1\u65f6\uff0c\u5f80\u5f80\u4e0d\u4ec5\u770b\u4ef7\u683c\u548c\u5e26\u5bbd\uff0c\u66f4\u5173\u5fc3CDN\u80fd\u5426\u5728\u771f\u5b9e\u7f51\u7edc\u73af\u5883\u4e2d\u5b9e\u73b0\u201c\u66f4\u7a33\u66f4\u5feb\u201d\u3002\u672c\u6587\u57fa\u4e8e\u5b9e\u6d4b\u4e0e\u6280\u672f\u539f\u7406\u89e3\u6790\uff0c\u6df1\u5165\u5256\u6790CDN\u667a\u80fd\u8c03\u5ea6\u7684\u5b9e\u73b0\u65b9\u5f0f\u3001\u5e38\u89c1\u573a\u666f\u3001\u4f18\u52a3\u5bf9\u6bd4\u4e0e\u9009\u8d2d\u5efa\u8bae\uff0c\u5e2e\u52a9\u4f60\u5728\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\u4e43\u81f3\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\u7b49\u591a\u5730\u57df\u90e8\u7f72\u65f6\u505a\u51fa\u66f4\u4f18\u51b3\u7b56\u3002<\/p>\n<h2>\u667a\u80fd\u8c03\u5ea6\u7684\u6838\u5fc3\u539f\u7406<\/h2>\n<p>CDN\u667a\u80fd\u8c03\u5ea6\u7684\u76ee\u6807\u662f\u5c06\u7528\u6237\u8bf7\u6c42\u8def\u7531\u5230\u6700\u4f18\u7684\u8fb9\u7f18\u8282\u70b9\u6216\u7f13\u5b58\u8282\u70b9\uff0c\u4ee5\u5b9e\u73b0\u6700\u4f4e\u5ef6\u8fdf\u548c\u6700\u9ad8\u53ef\u7528\u6027\u3002\u5e38\u89c1\u7684\u8c03\u5ea6\u673a\u5236\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>DNS\u7ea7\u8c03\u5ea6\uff08\u57fa\u4e8eGeoDNS\/GSLB\uff09<\/strong>\uff1a\u901a\u8fc7\u89e3\u6790\u8bf7\u6c42\u65f6\u8fd4\u56de\u4e0d\u540c\u7684CNAME\u6216A\u8bb0\u5f55\uff0c\u5c06\u7528\u6237\u5f15\u5bfc\u81f3\u6700\u8fd1\u6216\u5065\u5eb7\u7684\u8fb9\u7f18\u8282\u70b9\u3002\u4f18\u70b9\u662f\u517c\u5bb9\u6027\u5f3a\u3001\u5b9e\u73b0\u7b80\u5355\uff1b\u7f3a\u70b9\u662fDNS\u7f13\u5b58\u5bfc\u81f4\u5207\u6362\u4e0d\u591f\u7075\u6d3b\u3002<\/li>\n<li><strong>Anycast+BGP\u8def\u7531<\/strong>\uff1a\u8fb9\u7f18\u8282\u70b9\u4f7f\u7528\u540c\u4e00Anycast IP\uff0c\u901a\u8fc7BGP\u5c06\u6d41\u91cf\u5728\u7f51\u7edc\u5c42\u9762\u5f15\u5bfc\u5230\u903b\u8f91\u4e0a\u6700\u8fd1\u7684\u8282\u70b9\u3002\u8fd9\u79cd\u65b9\u5f0f\u5207\u6362\u5feb\u901f\u3001\u5bf9DDoS\u6709\u5929\u7136\u7f13\u89e3\uff0c\u4f46\u5bf9\u7ec6\u7c92\u5ea6\u6d41\u91cf\u5206\u53d1\uff08\u5982\u6309\u5b9e\u65f6RTT\uff09\u652f\u6301\u6709\u9650\u3002<\/li>\n<li><strong>\u57fa\u4e8e\u63a2\u6d4b\/\u5b9e\u65f6\u6027\u80fd\uff08RTT\u3001\u4e22\u5305\u3001\u5e26\u5bbd\uff09<\/strong>\uff1a\u901a\u8fc7\u4e3b\u52a8\u63a2\u6d4b\uff08ICMP\/TCP\/HTTP\u63a2\u6d4b\uff09\u4e0e\u88ab\u52a8\u76d1\u6d4b\uff08RUM\u3001\u65e5\u5fd7\uff09\u83b7\u53d6\u7f51\u7edc\u8d28\u91cf\u6307\u6807\uff0c\u8c03\u5ea6\u5668\u6839\u636e\u5b9e\u65f6\u8868\u73b0\u8c03\u6574\u8282\u70b9\u6743\u91cd\uff0c\u5b9e\u73b0\u8f83\u7cbe\u7ec6\u7684\u6d41\u91cf\u5206\u914d\u3002<\/li>\n<li><strong>\u5e94\u7528\u5c42\u8c03\u5ea6\uff08HTTP Redirect\u3001API\u63a7\u5236\uff09<\/strong>\uff1a\u901a\u8fc7\u5e94\u7528\u5c42\u8fd4\u56de302\/307\u6216CDN\u63a7\u5236API\u5b9e\u73b0\u66f4\u7075\u6d3b\u7684\u6d41\u91cf\u5f15\u5bfc\uff0c\u9002\u7528\u4e8eA\/B\u6d4b\u8bd5\u6216\u7279\u6b8a\u7b56\u7565\u3002<\/li>\n<\/ul>\n<h3>\u8c03\u5ea6\u7b97\u6cd5\u7ec6\u8282<\/h3>\n<p>\u5b9e\u9645\u751f\u4ea7\u4e2d\u5e38\u7528\u7684\u8c03\u5ea6\u7b97\u6cd5\u5305\u62ec\uff1a\u6700\u5c11\u8fde\u63a5\uff08least connections\uff09\u3001\u52a0\u6743\u8f6e\u8be2\uff08weighted round robin\uff09\u3001\u57fa\u4e8e\u5ef6\u8fdf\u7684\u6392\u5e8f\uff08latency-aware routing\uff09\u3001\u4e00\u81f4\u6027\u54c8\u5e0c\uff08\u7528\u4e8e\u7f13\u5b58\u4eb2\u548c\u6027\uff09\u3001\u4ee5\u53ca\u6df7\u5408\u7b56\u7565\uff08\u4f8b\u5982\u5148\u6309\u5730\u7406\u5206\u914d\u518d\u6309\u5b9e\u65f6RTT\u5fae\u8c03\uff09\u3002\u6b64\u5916\uff0c<strong>\u5065\u5eb7\u68c0\u67e5\u4e0e\u7194\u65ad\uff08circuit breaker\uff09\u673a\u5236<\/strong>\u662f\u4fdd\u8bc1\u7a33\u5065\u6027\u7684\u5173\u952e\uff1a\u5f53\u67d0\u8282\u70b9\u54cd\u5e94\u65f6\u95f4\u6216\u9519\u8bef\u7387\u8d85\u8fc7\u9608\u503c\uff0c\u8c03\u5ea6\u5668\u7acb\u5373\u964d\u4f4e\u5176\u6743\u91cd\u6216\u5254\u9664\u6d41\u91cf\u3002<\/p>\n<h2>\u5b9e\u6d4b\u573a\u666f\u4e0e\u5e94\u7528\u5206\u6790<\/h2>\n<p>\u6211\u4eec\u5c06\u8c03\u5ea6\u7b56\u7565\u653e\u5728\u591a\u5730\u5b9e\u6d4b\u573a\u666f\u4e2d\u8003\u5bdf\uff0c\u7279\u522b\u5173\u6ce8\u9999\u6e2f\u3001\u7f8e\u56fd\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u7b49\u8282\u70b9\u7684\u8868\u73b0\uff0c\u4ee5\u53ca\u5728\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u4f5c\u4e3a\u6e90\u7ad9\u65f6\u7684\u5dee\u5f02\u3002<\/p>\n<h3>\u573a\u666f\u4e00\uff1a\u4e9a\u592a\u8bbf\u5ba2\uff0c\u9999\u6e2f\u4e0e\u65b0\u52a0\u5761\u8282\u70b9\u6bd4\u8f83<\/h3>\n<ul>\n<li>\u5b9e\u6d4b\u53d1\u73b0\uff1a\u9999\u6e2f\u8282\u70b9\u5bf9\u5e7f\u4e1c\u3001\u9999\u6e2f\u3001\u6fb3\u95e8\u7b49\u5730\u7684\u5ef6\u8fdf\u4f18\u52bf\u660e\u663e\uff0c\u901a\u5e38\u6bd4\u65b0\u52a0\u5761\u4f4e10-30ms\uff1b\u4f46\u5728\u65e5\u672c\u3001\u97e9\u56fd\u8bbf\u95ee\u65f6\uff0c\u65b0\u52a0\u5761\u6709\u65f6\u901a\u8fc7\u66f4\u4f18\u7684\u4e2d\u8f6c\u94fe\u8def\u5b9e\u73b0\u8f83\u7a33\u5b9a\u4f20\u8f93\u3002<\/li>\n<li>\u8c03\u5ea6\u7b56\u7565\u5efa\u8bae\uff1a\u5bf9\u4e2d\u56fd\u5357\u65b9\u6d41\u91cf\u4f18\u5148\u9009\u62e9\u9999\u6e2f\u8282\u70b9\uff0c\u7ed3\u5408\u5b9e\u65f6RTT\u76d1\u6d4b\u5728\u9ad8\u4e22\u5305\u6216\u94fe\u8def\u62e5\u585e\u65f6\u5207\u6362\u5230\u65b0\u52a0\u5761\u6216\u65e5\u672c\u8282\u70b9\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f\u4e8c\uff1a\u5317\u7f8e\u7528\u6237\u8bbf\u95ee\uff0cAnycast\u4e0eDNS\u8c03\u5ea6\u7684\u5dee\u5f02<\/h3>\n<ul>\n<li>Anycast\u5728\u8de8\u6d32\u8bbf\u95ee\u4e2d\u80fd\u6709\u6548\u51cf\u5c11\u9996\u6b21\u8def\u7531\u6296\u52a8\uff0c<strong>\u5c24\u5176\u5728\u6ca1\u6709\u7cbe\u7ec6\u5316\u63a2\u6d4b\u80fd\u529b\u7684\u60c5\u51b5\u4e0b\uff0c\u80fd\u4fdd\u8bc1\u7a33\u5b9a\u5230\u8fbe\u6700\u8fd1\u7684\u7f51\u7edc\u63a5\u5165\u70b9<\/strong>\u3002<\/li>\n<li>DNS\u8c03\u5ea6\u7ed3\u5408ISP\u611f\u77e5\uff08ISP-aware\uff09\u4f1a\u5728\u67d0\u4e9b\u8fd0\u8425\u5546\u5185\u90e8\u7f51\u7edc\u4e2d\u8868\u73b0\u66f4\u597d\uff0c\u56e0\u4e3a\u5b83\u80fd\u56de\u907f\u8fd0\u8425\u5546\u95f4\u52a3\u8d28\u4e92\u8054\u94fe\u8def\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f\u4e09\uff1a\u591a\u6e90\u7ad9\uff08\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u4e0e\u8de8\u56fd\u5bb9\u707e<\/h3>\n<p>\u591a\u6e90\u7ad9\u90e8\u7f72\u5e38\u89c1\u4e8e\u5168\u7403\u5316\u4e1a\u52a1\u3002\u667a\u80fd\u8c03\u5ea6\u5728\u8fd9\u91cc\u5fc5\u987b\u8003\u8651\u6e90\u7ad9\u5065\u5eb7\u3001\u56de\u6e90\u5e26\u5bbd\u4e0e\u7f13\u5b58\u547d\u4e2d\u7387\u3002\u5e38\u89c1\u7b56\u7565\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4f18\u5148\u4f7f\u7528\u79bb\u7528\u6237\u6700\u8fd1\u7684\u8fb9\u7f18\u7f13\u5b58\uff0c\u56de\u6e90\u4ec5\u5728\u7f13\u5b58\u672a\u547d\u4e2d\u6216\u9700\u8981\u52a8\u6001\u5185\u5bb9\u65f6\u8fdb\u884c\u3002<\/li>\n<li>\u4f7f\u7528<em>Origin Shield<\/em>\u6216\u4e2d\u95f4\u5c42\u7f13\u5b58\u51cf\u5c11\u5bf9\u6e90\u7ad9\uff08\u5982\u9999\u6e2fVPS\u6216\u7f8e\u56fdVPS\uff09\u7684\u5e76\u53d1\u538b\u529b\u3002<\/li>\n<li>\u5728\u8de8\u56fd\u56de\u6e90\u65f6\u542f\u7528TCP\u4f18\u5316\uff08\u5982TCP Fast 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