{"id":210255,"date":"2025-10-24T09:09:34","date_gmt":"2025-10-24T01:09:34","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210255\/"},"modified":"2025-10-24T09:09:35","modified_gmt":"2025-10-24T01:09:35","slug":"cdn-339","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210255\/","title":{"rendered":"\u4f4e\u5ef6\u8fdf\u9ad8\u53ef\u7528\uff1aCDN\u89c6\u9891\u6d41\u5206\u53d1\u4f18\u5316\u7b56\u7565"},"content":{"rendered":"<p>\u5728\u89c6\u9891\u76f4\u64ad\u4e0e\u70b9\u64ad\u573a\u666f\u4e2d\uff0c\u5982\u4f55\u5728\u5168\u7403\u8303\u56f4\u5185\u5b9e\u73b0\u4f4e\u5ef6\u8fdf\u540c\u65f6\u4fdd\u969c\u9ad8\u53ef\u7528\u6027\uff0c\u662f\u7ad9\u957f\u3001\u4f01\u4e1a\u4e0e\u5f00\u53d1\u8005\u5728\u6784\u5efa\u6d41\u5a92\u4f53\u5206\u53d1\u5e73\u53f0\u65f6\u5fc5\u987b\u9762\u5bf9\u7684\u6838\u5fc3\u95ee\u9898\u3002\u672c\u6587\u4ece\u539f\u7406\u5230\u5b9e\u8df5\uff0c\u6df1\u5165\u89e3\u6790\u57fa\u4e8eCDN\u7684\u89c6\u9891\u6d41\u5206\u53d1\u4f18\u5316\u7b56\u7565\uff0c\u5305\u542b\u7f51\u7edc\u5c42\u3001\u4f20\u8f93\u5c42\u4e0e\u5e94\u7528\u5c42\u7684\u6280\u672f\u7ec6\u8282\uff0c\u5e76\u7ed9\u51fa\u5728\u4e0d\u540c\u5730\u57df\uff08\u5982\u9999\u6e2f\u3001\u7f8e\u56fd\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\uff09\u90e8\u7f72\u65f6\u7684\u9009\u8d2d\u5efa\u8bae\uff0c\u5e2e\u52a9\u60a8\u5728\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\u7b49\u8d44\u6e90\u65f6\u53d6\u5f97\u6700\u4f18\u6548\u679c\u3002<\/p>\n<h2>\u89c6\u9891\u6d41\u5206\u53d1\u7684\u57fa\u672c\u539f\u7406\u4e0e\u5173\u952e\u6307\u6807<\/h2>\n<p>\u89c6\u9891\u6d41\u5206\u53d1\u901a\u5e38\u7531\u6e90\u7ad9\uff08Origin\uff09\u3001\u4f20\u8f93\u7f51\u7edc\uff08CDN\/\u8fb9\u7f18\u8282\u70b9\uff09\u548c\u5ba2\u6237\u7aef\u64ad\u653e\u5668\u4e09\u90e8\u5206\u7ec4\u6210\u3002\u8861\u91cf\u6027\u80fd\u7684\u5173\u952e\u6307\u6807\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u5f80\u8fd4\u65f6\u5ef6\uff08RTT\uff09\uff1a\u5f71\u54cd\u9996\u5e27\u65f6\u95f4\u4e0e\u4ea4\u4e92\u5ef6\u8fdf\u3002<\/li>\n<li>\u6296\u52a8\uff08Jitter\uff09\uff1a\u5f71\u54cd\u64ad\u653e\u7a33\u5b9a\u6027\u4e0e\u7f13\u51b2\u91cd\u4f20\u3002<\/li>\n<li>\u541e\u5410\u91cf\uff08Throughput\uff09\uff1a\u51b3\u5b9a\u53ef\u8fbe\u7684\u7801\u7387\u4e0a\u9650\u3002<\/li>\n<li>\u53ef\u7528\u6027\uff08Availability\uff09\uff1a\u8282\u70b9\u6545\u969c\u6216DDoS\u653b\u51fb\u65f6\u7684\u7528\u6237\u4f53\u9a8c\u4fdd\u6301\u80fd\u529b\u3002<\/li>\n<li>\u51b7\u542f\u52a8\u65f6\u95f4\uff08Startup Latency\uff09\u4e0e\u9996\u5c4f\u65f6\u95f4\uff08Time-to-first-frame\uff09\u3002<\/li>\n<\/ul>\n<p>\u4f18\u5316\u601d\u8def\u5373\u56f4\u7ed5\u4e0b\u964dRTT\u3001\u964d\u4f4e\u6296\u52a8\u3001\u63d0\u9ad8\u53ef\u7528\u6027\u4e0e\u63d0\u5347\u5e26\u5bbd\u5229\u7528\u7387\u5c55\u5f00\u3002<\/p>\n<h3>\u4f20\u8f93\u534f\u8bae\u4e0e\u7f16\u7801\u9009\u62e9<\/h3>\n<p>\u4f20\u7edfHTTP\/HTTPS + HLS\/DASH\u662f\u6700\u5e7f\u6cdb\u7684\u65b9\u6848\uff0c\u4f46\u4e3a\u964d\u4f4e\u5ef6\u8fdf\uff0c\u5e94\u8003\u8651\u4ee5\u4e0b\u6280\u672f\uff1a<\/p>\n<ul>\n<li><strong>QUIC\/HTTP\/3<\/strong>\uff1a\u57fa\u4e8eUDP\u7684\u4f20\u8f93\uff0c\u51cf\u5c11\u63e1\u624b\u5ef6\u8fdf\u5e76\u6539\u5584\u4e22\u5305\u73af\u5883\u4e0b\u7684\u8868\u73b0\uff0c\u9002\u5408\u8de8\u6d0b\u94fe\u8def\u3002<\/li>\n<li><strong>LL-HLS \/ Low-Latency DASH\uff08CMAF\uff09<\/strong>\uff1a\u901a\u8fc7\u66f4\u5c0f\u7684\u5206\u7247\uff08chunk\uff09\u3001HTTP\u5206\u7247\u4f20\u8f93\u4e0e\u9884\u53d6\u5b9e\u73b0\u7aef\u5230\u7aef\u5ef6\u8fdf\u964d\u81f31\u79d2\u7ea7\u3002<\/li>\n<li>\u5b9e\u65f6\u4f20\u8f93\u534f\u8bae\u5982<strong>WebRTC<\/strong>\u4e0e\uff08Secure Reliable Transport\uff09\uff1a\u7528\u4e8e\u8d85\u4f4e\u5ef6\u8fdf\u5b9e\u65f6\u4e92\u52a8\u573a\u666f\uff0c\u4f46\u9700\u5728\u8fb9\u7f18\u8282\u70b9\u652f\u6301\u56de\u6e90\u6216P2P\u7b56\u7565\u3002<\/li>\n<li>\u81ea\u9002\u5e94\u7801\u7387\uff08ABR\uff09\u7b97\u6cd5\uff1a\u7ed3\u5408BOLA\u3001PANDA\u7b49\u7b56\u7565\u5728\u6ce2\u52a8\u7f51\u7edc\u4e0b\u5feb\u901f\u5207\u6362\u7801\u7387\uff0c\u907f\u514d\u91cd\u7f13\u51b2\u3002<\/li>\n<\/ul>\n<h2>\u8fb9\u7f18\u90e8\u7f72\u4e0e\u8def\u7531\u7b56\u7565\uff1a\u51cf\u5c11\u7f51\u7edc\u8df3\u6570\u4e0e\u6296\u52a8<\/h2>\n<p>CDN\u7684\u6838\u5fc3\u4ef7\u503c\u5728\u4e8e\u5c06\u5185\u5bb9\u5c3d\u53ef\u80fd\u9760\u8fd1\u7ec8\u7aef\u3002\u5b9e\u73b0\u4f4e\u5ef6\u8fdf\u7684\u505a\u6cd5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>Anycast+\u8fb9\u7f18\u8282\u70b9\u90e8\u7f72<\/strong>\uff1a\u4f7f\u7528Anycast\u5c06\u5ba2\u6237\u7aef\u6d41\u91cf\u5f15\u5bfc\u5230\u6700\u8fd1\u6216\u6700\u4f18\u8fb9\u7f18\u8282\u70b9\uff0c\u964d\u4f4eDNS\u89e3\u6790\u81f3\u8bbf\u95ee\u7684\u65f6\u95f4\u6210\u672c\u3002<\/li>\n<li>\u591a\u533a\u57df\u90e8\u7f72\uff1a\u5728\u9999\u6e2f\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u4ee5\u53ca\u7f8e\u56fd\u7b49\u5173\u952e\u5e02\u573a\u90e8\u7f72\u8fb9\u7f18\u6216\u56de\u6e90\u70b9\uff0c\u7ed3\u5408\u667a\u80fdDNS\u6216\u5730\u7406\u8def\u7531\u5b9e\u73b0\u5730\u57df\u611f\u77e5\u3002<\/li>\n<li>\u8fb9\u7f18\u7f13\u5b58\u7ec6\u7c92\u5ea6\u63a7\u5236\uff1a\u89c6\u9891\u91c7\u7528\u5206\u7247\u5316\u5b58\u50a8\uff0c\u5e38\u770b\u5206\u7247\u8bbe\u5b9a\u8f83\u957fTTL\uff0c\u51b7\u95e8\u5206\u7247\u91c7\u7528\u56de\u6e90\u7b56\u7565\uff0c\u51cf\u5c11\u8fb9\u7f18\u78c1\u76d8\u538b\u529b\u3002<\/li>\n<li>Origin Shield\/\u4e2d\u95f4\u7f13\u5b58\u5c42\uff1a\u5728\u6e90\u7ad9\u4e0e\u8fb9\u7f18\u4e4b\u95f4\u589e\u52a0\u4fdd\u62a4\u5c42\u4ee5\u51cf\u5c11\u56de\u6e90\u5e76\u53d1\uff0c\u907f\u514d\u6e90\u7ad9\u8fc7\u8f7d\u5bfc\u81f4\u7684\u53ef\u7528\u6027\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<h3>\u7f51\u7edc\u4f18\u5316\u7ec6\u8282<\/h3>\n<p>\u5177\u4f53\u53ef\u91c7\u53d6\u7684\u7f51\u7edc\u4f18\u5316\u63aa\u65bd\uff1a<\/p>\n<ul>\n<li>TCP\/TFO\/TLS 0-RTT \u4e0e QUIC\u76840-RTT\u63e1\u624b\u51cf\u5c11\u9996\u6b21\u8fde\u63a5\u5ef6\u8fdf\u3002<\/li>\n<li>TCP\u5feb\u901f\u6253\u5f00\u4e0e\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\uff08BBR\uff09\u63d0\u5347\u4e22\u5305\u73af\u5883\u4e0b\u541e\u5410\u3002<\/li>\n<li>\u4f7f\u7528\u5e26\u5bbd\u4e0e\u5ef6\u8fdf\u5206\u5c42\u76d1\u6d4b\uff0c\u52a8\u6001\u8c03\u6574\u8def\u7531\u7b56\u7565\uff08\u4f8b\u5982\u7ed5\u8fc7\u5f53\u524d\u6296\u52a8\u5927\u7684\u4e2d\u7ee7\u8282\u70b9\uff09\u3002<\/li>\n<li>\u5728\u8de8\u5883\u94fe\u8def\u4e0a\u4f7f\u7528\u4e13\u7ebf\u6216SD-WAN\u4f18\u5316QoS\uff0c\u4ee5\u786e\u4fdd\u672c\u5730\u90e8\u7f72\uff08\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u5230\u8fb9\u7f18\u7684\u7a33\u5b9a\u94fe\u8def\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u5c42\u4f18\u5316\uff1a\u7f13\u51b2\u7b56\u7565\u3001\u5206\u7247\u5c3a\u5bf8\u4e0e\u52a0\u5bc6<\/h2>\n<p>\u5728\u5e94\u7528\u5c42\u53ef\u901a\u8fc7\u7ec6\u5316\u64ad\u653e\u5668\u4e0e\u540e\u7aef\u7684\u534f\u540c\u7b56\u7565\u5b9e\u73b0\u66f4\u4f4e\u5ef6\u8fdf\u4e0e\u66f4\u9ad8\u53ef\u7528\u6027\uff1a<\/p>\n<ul>\n<li>\u5206\u7247\u5c3a\u5bf8\u4e0e\u5206\u53d1\u9891\u7387\uff1a\u8f83\u5c0f\u7684\u5206\u7247\uff08\u4f8b\u59820.5s 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