{"id":210431,"date":"2025-10-29T14:12:27","date_gmt":"2025-10-29T06:12:27","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210431\/"},"modified":"2025-10-29T14:12:28","modified_gmt":"2025-10-29T06:12:28","slug":"cdn-405","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210431\/","title":{"rendered":"CDN\u77ed\u89c6\u9891\u52a0\u901f\u4e0e\u667a\u80fd\u4f18\u5316\uff1a\u5b9e\u73b0\u79d2\u5f00\u3001\u4f4e\u5ef6\u8fdf\u7684\u6838\u5fc3\u6280\u672f"},"content":{"rendered":"<p>\u5728\u77ed\u89c6\u9891\u548c\u76f4\u64ad\u573a\u666f\u65e5\u76ca\u666e\u53ca\u7684\u4eca\u5929\uff0c\u7528\u6237\u5bf9\u201c\u79d2\u5f00\u201d\u548c\u201c\u4f4e\u5ef6\u8fdf\u201d\u7684\u671f\u671b\u4e0d\u65ad\u63d0\u9ad8\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u5355\u7eaf\u4f9d\u8d56\u5e26\u5bbd\u5df2\u7ecf\u65e0\u6cd5\u6ee1\u8db3\u5b9e\u65f6\u6027\u4e0e\u6d41\u7545\u6027\u7684\u53cc\u91cd\u9700\u6c42\u3002\u901a\u8fc7\u7ed3\u5408CDN\u77ed\u89c6\u9891\u52a0\u901f\u4e0e\u667a\u80fd\u4f18\u5316\u6280\u672f\uff0c\u53ef\u4ee5\u5728\u5168\u7403\u8303\u56f4\u5185\u5b9e\u73b0\u7a33\u5b9a\u7684\u89c2\u770b\u4f53\u9a8c\uff0c\u540c\u65f6\u964d\u4f4e\u56de\u6e90\u538b\u529b\u4e0e\u5e26\u5bbd\u6210\u672c\u3002\u4e0b\u9762\u5c06\u4ece\u539f\u7406\u3001\u5173\u952e\u6280\u672f\u3001\u5e94\u7528\u573a\u666f\u3001\u4f18\u52bf\u5bf9\u6bd4\u4e0e\u9009\u8d2d\u5efa\u8bae\u7b49\u65b9\u9762\u505a\u6df1\u5165\u89e3\u6790\u3002<\/p>\n<h2>\u539f\u7406\u4e0e\u67b6\u6784\u6982\u8ff0<\/h2>\n<p>\u77ed\u89c6\u9891\u52a0\u901f\u7684\u6838\u5fc3\u5728\u4e8e\u51cf\u5c11\u6570\u636e\u5728\u7f51\u7edc\u4e2d\u7684\u4f20\u8f93\u8ddd\u79bb\u548c\u65f6\u95f4\uff0c\u4ee5\u53ca\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u964d\u4f4e\u6296\u52a8\u4e0e\u4e22\u5305\u5f71\u54cd\u3002\u5178\u578b\u67b6\u6784\u5305\u62ec\uff1a\u7528\u6237\u4fa7\u2192\u6700\u8fd1\u7684\u8fb9\u7f18\u8282\u70b9\uff08Edge 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\u57fa\u4e8e QUIC \u7684\u65e0\u8fde\u63a5\u91cd\u4f20\u4e0e0-RTT\u8fde\u63a5\u5efa\u7acb\u5bf9\u77ed\u89c6\u9891\u7684\u9996\u5e27\u52a0\u8f7d\u65f6\u95f4\u6709\u663e\u8457\u6539\u5584\u3002<\/li>\n<li><strong>CMAF+Chunked-Transfer, HLS\/DASH \u7684\u4f4e\u5ef6\u8fdf\u6269\u5c55\uff08LL-HLS \/ Low-Latency DASH\uff09<\/strong>\uff1a\u901a\u8fc7\u66f4\u5c0f\u7684\u5207\u7247\uff08chunk\uff09\u548c\u5b9e\u65f6\u4f20\u8f93\u673a\u5236\uff0c\u5b9e\u73b0\u63a5\u8fd1\u5b9e\u65f6\u7684\u64ad\u653e\u542f\u52a8\u4e0e\u4e92\u52a8\u5ef6\u8fdf\u3002<\/li>\n<li><strong>WebRTC \/ SRT \u7b49\u4f20\u8f93\u534f\u8bae<\/strong>\uff1a\u5728\u4e92\u52a8\u6027\u8981\u6c42\u6781\u9ad8\u7684\u573a\u666f\uff08\u76f4\u64ad\u8fde\u9ea6\u3001\u5b9e\u65f6\u534f\u4f5c\uff09\u4e2d\uff0cWebRTC \u63d0\u4f9b\u7aef\u5230\u7aef\u4f4e\u5ef6\u8fdf\u8def\u5f84\uff0c\u800c SRT \u53ef\u5728\u4e0d\u53ef\u9760\u7f51\u7edc\u4e2d\u4fdd\u8bc1\u4e22\u5305\u6062\u590d\u3002<\/li>\n<\/ul>\n<h3>\u667a\u80fd\u8def\u7531\u4e0eAnycast<\/h3>\n<ul>\n<li>\u57fa\u4e8e Anycast \u7684DNS \u4e0e\u7f51\u7edc\u8def\u7531\uff0c\u4f7f\u7528\u6237\u8bf7\u6c42\u88ab\u5f15\u5bfc\u5230\u6700\u8fd1\u4e14\u8d28\u91cf\u6700\u4f18\u7684 PoP\u3002<\/li>\n<li>\u667a\u80fd\u8c03\u5ea6\u8003\u8651\u94fe\u8def\u8d28\u91cf\u3001\u8282\u70b9\u8d1f\u8f7d\u548c\u5730\u7406\u4f4d\u7f6e\uff0c\u51cf\u5c11\u7f51\u7edc\u6296\u52a8\u4e0e\u4e2d\u95f4\u8dc3\u70b9\uff0c\u4ece\u800c\u964d\u4f4e\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u4f20\u8f93\u4f18\u5316\u4e0e\u62e5\u585e\u63a7\u5236<\/h3>\n<ul>\n<li>\u91c7\u7528\u73b0\u4ee3\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\uff08\u5982 BBR\uff09\u66ff\u4ee3\u4f20\u7edf\u7684 CUBIC\uff0c\u53ef\u5728\u9ad8\u5e26\u5bbd\u9ad8\u5ef6\u8fdf\u94fe\u8def\u4e2d\u63d0\u5347\u541e\u5410\u4e0e\u901f\u7387\u6536\u655b\u901f\u5ea6\u3002<\/li>\n<li>TCP \u5feb\u901f\u6253\u5f00\uff08TFO\uff09\u3001TLS 0-RTT \u4e0e\u4f1a\u8bdd\u590d\u7528\u6709\u52a9\u4e8e\u51cf\u5c11\u8fde\u63a5\u5efa\u7acb\u65f6\u5ef6\u3002<\/li>\n<\/ul>\n<h2>\u5173\u952e\u6280\u672f\u7ec6\u8282<\/h2>\n<p>\u8981\u5b9e\u73b0\u201c\u79d2\u5f00\u3001\u4f4e\u5ef6\u8fdf\u201d\u7684\u4f53\u9a8c\uff0c\u5fc5\u987b\u5728\u591a\u4e2a\u5c42\u9762\u8fdb\u884c\u7cbe\u7ec6\u5316\u4f18\u5316\uff1a<\/p>\n<h3>\u5207\u7247\u7b56\u7565\u4e0e\u81ea\u9002\u5e94\u7801\u7387\uff08ABR\uff09<\/h3>\n<ul>\n<li>\u77ed\u7247\u573a\u666f\u5e38\u7528\u8f83\u77ed\u5207\u7247\uff08\u4f8b\u5982 1s \u6216 2s\uff09\uff0c\u914d\u5408 <strong>CMAF<\/strong> \u683c\u5f0f\u53ef\u5b9e\u73b0\u8de8\u534f\u8bae\u590d\u7528\uff0c\u51cf\u5c11\u9996\u5c4f\u65f6\u95f4\u3002<\/li>\n<li>\u81ea\u9002\u5e94\u7801\u7387\u7b97\u6cd5\u9700\u8981\u7ed3\u5408\u5b9e\u65f6\u7f51\u7edc\u63a2\u6d4b\u4e0e\u7aef\u4fa7\u7f13\u51b2\u7b56\u7565\uff0c\u91c7\u7528\u4ee5\u5e26\u5bbd\u4f30\u8ba1\u548c\u4e22\u5305\u7387\u4e3a\u8f93\u5165\u7684\u51b3\u7b56\u903b\u8f91\uff0c\u907f\u514d\u9891\u7e41\u5207\u6362\u7801\u7387\u5bfc\u81f4\u5361\u987f\u3002<\/li>\n<\/ul>\n<h3>\u8fb9\u7f18\u8f6c\u7801\u4e0e\u683c\u5f0f\u9002\u914d<\/h3>\n<ul>\n<li>\u8fb9\u7f18\u8282\u70b9\u505a\u8fd1\u6e90\u8f6c\u7801\u6216\u591a\u5206\u8fa8\u7387\u9884\u751f\u6210\uff0c\u51cf\u5c11\u56de\u6e90\u8f6c\u7801\u5ef6\u8fdf\uff0c\u652f\u6301\u5feb\u901f\u5206\u53d1\u7ed9\u4e0d\u540c\u7ec8\u7aef\uff08\u79fb\u52a8\u7aef\u3001\u684c\u9762\u7aef\u3001\u667a\u80fd\u7535\u89c6\uff09\u3002<\/li>\n<li>\u5408\u7406\u5229\u7528\u8fb9\u7f18\u8ba1\u7b97\u8d44\u6e90\uff0c\u53ef\u4ee5\u5728 PoP \u4fa7\u5b8c\u6210\u6c34\u5370\u3001\u4e2a\u6027\u5316\u5207\u7247\u3001\u5b9e\u65f6\u5b57\u5e55\u7b49\u5904\u7406\uff0c\u63d0\u9ad8\u7528\u6237\u4f53\u9a8c\u4e14\u8282\u7701\u6e90\u7ad9\u8ba1\u7b97\u8d44\u6e90\u3002<\/li>\n<\/ul>\n<h3>\u6d41\u63a7\u4e0e\u7f13\u5b58\u7b56\u7565<\/h3>\n<ul>\n<li>\u5bf9\u70ed\u70b9\u77ed\u89c6\u9891\u5b9e\u65bd\u4e3b\u52a8\u9884\u70ed\uff08cache warming\uff09\u4e0e\u9884\u53d6\uff08prefetch\uff09\uff0c\u57fa\u4e8e\u8bbf\u95ee\u9884\u6d4b\u6a21\u578b\u63d0\u524d\u4e0b\u53d1\u5230\u8fb9\u7f18\uff0c\u4fdd\u8bc1\u79d2\u5f00\u3002<\/li>\n<li>\u91c7\u7528\u5206\u7247\u4f18\u5148\u7ea7\u7b56\u7565\uff1a\u5c06\u64ad\u653e\u9996\u5c4f\u5207\u7247\u7f6e\u4e8e\u9ad8\u4f18\u5148\u7ea7\uff0c\u4fdd\u8bc1\u521d\u59cb\u4e0b\u8f7d\u901f\u5ea6\uff0c\u518d\u5e76\u884c\u62c9\u53d6\u540e\u7eed\u7684\u4e2d\u4f4e\u4f18\u5148\u7ea7\u7247\u6bb5\u3002<\/li>\n<\/ul>\n<h3>\u4e22\u5305\u6062\u590d\u4e0e\u7ea0\u9519<\/h3>\n<ul>\n<li>\u524d\u5411\u7ea0\u9519\uff08FEC\uff09\u5728\u4e0d\u53ef\u9760\u94fe\u8def\u4e0a\u5bf9\u77ed\u7247\u4f20\u8f93\u6709\u5e2e\u52a9\uff0c\u51cf\u5c11\u91cd\u4f20\u5bfc\u81f4\u7684\u5361\u987f\u3002<\/li>\n<li>\u5feb\u901f\u91cd\u4f20\u4e0e\u9009\u62e9\u6027\u786e\u8ba4\uff08SACK\uff09\u7ed3\u5408\u5e94\u7528\u5c42\u91cd\u8bd5\u7b56\u7565\uff0c\u7f29\u77ed\u89c6\u9891\u6bb5\u4e22\u5931\u540e\u7684\u6062\u590d\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u6848\u4f8b\u5206\u6790<\/h2>\n<p>\u4e0d\u540c\u573a\u666f\u5bf9\u52a0\u901f\u4e0e\u4f18\u5316\u7684\u4fa7\u91cd\u70b9\u4e0d\u5c3d\u76f8\u540c\uff1a<\/p>\n<h3>\u77ed\u89c6\u9891\u70b9\u64ad<\/h3>\n<ul>\n<li>\u91cd\u70b9\uff1a\u79d2\u5f00\u3001\u5e26\u5bbd\u6210\u672c\u63a7\u5236\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u3002<\/li>\n<li>\u65b9\u6848\u8981\u70b9\uff1a\u957f\u65f6\u6548\u8fb9\u7f18\u7f13\u5b58\u3001\u5207\u7247\u9884\u70ed\u3001ABR \u5e73\u6ed1\u7b56\u7565\u3001HTTP\/3 \u4f18\u5148\u3002<\/li>\n<\/ul>\n<h3>\u4f4e\u5ef6\u8fdf\u76f4\u64ad\u4e0e\u4e92\u52a8<\/h3>\n<ul>\n<li>\u91cd\u70b9\uff1a\u7aef\u5230\u7aef\u5ef6\u8fdf\u3001\u4e22\u5305\u6062\u590d\u3001\u5b9e\u65f6\u4f20\u8f93\u3002<\/li>\n<li>\u65b9\u6848\u8981\u70b9\uff1a\u4f7f\u7528 LL-HLS\/CMAF \u6216 WebRTC\uff0c\u8fb9\u7f18\u8f6c\u7801\u4e0e\u8fb9\u7f18\u8f6c\u53d1\uff0cSRT \u5728\u4e0d\u53ef\u9760\u94fe\u8def\u4e0b\u7684\u7a33\u5065\u6027\u3002<\/li>\n<\/ul>\n<h3>\u5168\u7403\u5206\u53d1\u4e0e\u8de8\u5883\u4f20\u8f93<\/h3>\n<ul>\n<li>\u91cd\u70b9\uff1a\u8de8\u6d0b\u5ef6\u8fdf\u3001\u5730\u57df\u5408\u89c4\u3001CDN PoP \u8986\u76d6\u3002<\/li>\n<li>\u65b9\u6848\u8981\u70b9\uff1a\u91c7\u7528 Anycast DNS \u4e0e\u591a\u4e2a\u5730\u533a PoP\uff08\u4f8b\u5982\u9999\u6e2f\u3001\u7f8e\u56fd\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\uff09\uff0c\u5e76\u5728\u5173\u952e\u94fe\u8def\u4f7f\u7528\u4e13\u7ebf\u6216\u52a0\u901f\u96a7\u9053\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u4f20\u7edf\u52a0\u901f vs \u667a\u80fd\u4f18\u5316CDN<\/h2>\n<p>\u4ec5\u4f9d\u9760\u5e26\u5bbd\u6269\u5bb9\u548c\u4f20\u7edf\u7f13\u5b58\u7b56\u7565\uff0c\u4e0d\u8db3\u4ee5\u6ee1\u8db3\u73b0\u4ee3\u77ed\u89c6\u9891\u7684\u9ad8\u5e76\u53d1\u4e0e\u4f4e\u5ef6\u8fdf\u9700\u6c42\u3002\u901a\u8fc7\u667a\u80fd\u4f18\u5316\u7684 CDN \u5e73\u53f0\u53ef\u4ee5\u5e26\u6765\u663e\u8457\u63d0\u5347\uff1a<\/p>\n<ul>\n<li><strong>\u542f\u52a8\u65f6\u95f4<\/strong>\uff1a\u667a\u80fd\u9884\u70ed\u4e0e HTTP\/3 \u53ef\u4f7f\u9996\u5c4f\u65f6\u95f4\u7531\u79d2\u7ea7\u964d\u4f4e\u81f3\u4e9a\u79d2\u7ea7\u3002<\/li>\n<li><strong>\u5ef6\u8fdf\u7a33\u5b9a\u6027<\/strong>\uff1a\u62e5\u585e\u63a7\u5236\u4e0e\u667a\u80fd\u8def\u7531\u51cf\u5c11\u5ef6\u8fdf\u6296\u52a8\uff0c\u89c2\u611f\u66f4\u5e73\u6ed1\u3002<\/li>\n<li><strong>\u6210\u672c\u6548\u7387<\/strong>\uff1a\u8fb9\u7f18\u8f6c\u7801\u4e0e\u7f13\u5b58\u547d\u4e2d\u7387\u63d0\u9ad8\u53ef\u51cf\u5c11\u56de\u6e90\u5e26\u5bbd\u8d39\u7528\u4e0e\u6e90\u7ad9\u8d1f\u8f7d\u3002<\/li>\n<li><strong>\u5168\u7403\u4e00\u81f4\u6027<\/strong>\uff1a\u5728\u9999\u6e2f\u4e0e\u4e9a\u592a\u8282\u70b9\uff08\u5982\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\uff09\u90e8\u7f72 PoP\uff0c\u53ef\u663e\u8457\u63d0\u5347\u8be5\u533a\u57df\u7528\u6237\u4f53\u9a8c\uff1b\u5728\u7f8e\u6d32\u90e8\u7f72\u7f8e\u56fd\u670d\u52a1\u5668\u4e0e\u7f8e\u56fdVPS \u5219\u4f18\u5316\u7f8e\u533a\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u5efa\u8bae\uff08\u7ad9\u957f\/\u4f01\u4e1a\/\u5f00\u53d1\u8005\uff09<\/h2>\n<p>\u5728\u4e3a\u77ed\u89c6\u9891\u4e1a\u52a1\u9009\u62e9 CDN \u4e0e\u670d\u52a1\u5668\u8d44\u6e90\u65f6\uff0c\u5e94\u5173\u6ce8\u4ee5\u4e0b\u8981\u70b9\uff1a<\/p>\n<h3>1. 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