{"id":210367,"date":"2025-10-24T11:49:20","date_gmt":"2025-10-24T03:49:20","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210367\/"},"modified":"2025-10-24T11:49:21","modified_gmt":"2025-10-24T03:49:21","slug":"cdn-380","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210367\/","title":{"rendered":"CDN\u591a\u534f\u8bae\u652f\u6301\u4e0e\u667a\u80fd\u8c03\u5ea6\uff1a\u5b9e\u73b0\u66f4\u5feb\u66f4\u7a33\u7684\u5168\u7403\u5185\u5bb9\u5206\u53d1"},"content":{"rendered":"<p>\u5728\u5168\u7403\u5316\u4e92\u8054\u7f51\u73af\u5883\u4e0b\uff0c\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u5df2\u6210\u4e3a\u63d0\u5347\u7f51\u7ad9\u4e0e\u5e94\u7528\u6027\u80fd\u7684\u5173\u952e\u57fa\u7840\u8bbe\u65bd\u3002\u968f\u7740\u534f\u8bae\u6f14\u8fdb\u4e0e\u4e1a\u52a1\u5f62\u6001\u591a\u6837\u5316\uff0c\u5355\u4e00\u534f\u8bae\u6216\u9759\u6001\u8c03\u5ea6\u7b56\u7565\u96be\u4ee5\u6ee1\u8db3\u4f4e\u5ef6\u8fdf\u3001\u9ad8\u53ef\u7528\u548c\u9ad8\u541e\u5410\u7684\u8981\u6c42\u3002\u672c\u6587\u4ece\u6280\u672f\u539f\u7406\u3001\u5e94\u7528\u573a\u666f\u3001\u4f18\u52bf\u5bf9\u6bd4\u548c\u9009\u8d2d\u5efa\u8bae\u56db\u4e2a\u65b9\u9762\u6df1\u5165\u63a2\u8ba8\u201cCDN\u591a\u534f\u8bae\u652f\u6301\u4e0e\u667a\u80fd\u8c03\u5ea6\u201d\u5982\u4f55\u5b9e\u73b0\u66f4\u5feb\u66f4\u7a33\u7684\u5168\u7403\u5185\u5bb9\u5206\u53d1\uff0c\u5e76\u7ed3\u5408\u5bf9\u8de8\u5883\u90e8\u7f72\uff08\u5982\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff09\u4e0e\u865a\u62df\u5316\u8d44\u6e90\uff08\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\uff09\u7b49\u73af\u5883\u7684\u5b9e\u9645\u5f71\u54cd\u7ed9\u51fa\u5b9e\u64cd\u5efa\u8bae\u3002<\/p>\n<h2>\u539f\u7406\uff1a\u591a\u534f\u8bae\u652f\u6301\u7684\u6280\u672f\u7ec6\u8282<\/h2>\n<p>\u4f20\u7edfCDN\u4e3b\u8981\u57fa\u4e8eHTTP\/1.1\u6216TCP+TLS\u4f20\u8f93\u5185\u5bb9\uff0c\u800c\u73b0\u4ee3CDN\u5e94\u540c\u65f6\u652f\u6301\u591a\u79cd\u4f20\u8f93\u4e0e\u4f1a\u8bdd\u534f\u8bae\u4ee5\u9002\u5e94\u4e0d\u540c\u4e1a\u52a1\u9700\u6c42\u3002\u5173\u952e\u6280\u672f\u70b9\u5305\u62ec\uff1a<\/p>\n<h3>\u4f20\u8f93\u534f\u8bae\u5c42\uff1aTCP\u3001UDP 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QUIC<\/h3>\n<ul>\n<li><strong>TCP\/TLS\uff08HTTP\/1.1\/HTTP\/2\uff09<\/strong>\uff1a\u53ef\u9760\u3001\u6709\u5e8f\u4f20\u8f93\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u9759\u6001\u5185\u5bb9\u4e0eAPI\u573a\u666f\u3002HTTP\/2\u901a\u8fc7\u591a\u8def\u590d\u7528\u3001\u5934\u90e8\u538b\u7f29\u548c\u4f18\u5148\u7ea7\u673a\u5236\u51cf\u5c11\u8bf7\u6c42\u5ef6\u8fdf\u3002<\/li>\n<li><strong>QUIC\/HTTP\/3<\/strong>\uff1a\u57fa\u4e8eUDP\u5b9e\u73b0\u7684\u591a\u8def\u590d\u7528\u548c\u5185\u5efa\u52a0\u5bc6\uff0c\u6d88\u9664\u4e86TCP\u4e09\u6b21\u63e1\u624b\u4e0eTLS\u63e1\u624b\u7684\u989d\u5916\u5f80\u8fd4\uff0c\u5c24\u5176\u5728\u9ad8\u4e22\u5305\u6216\u79fb\u52a8\u7f51\u7edc\u4e0b\u663e\u8457\u964d\u4f4e\u8fde\u63a5\u5efa\u7acb\u5ef6\u8fdf\u548c\u6062\u590d\u65f6\u95f4\u3002<\/li>\n<li><strong>WebSocket\/HTTP\u957f\u8fde\u63a5<\/strong>\uff1a\u7528\u4e8e\u5b9e\u65f6\u53cc\u5411\u901a\u4fe1\uff08\u5373\u65f6\u6d88\u606f\u3001\u63a8\u9001\u3001\u6e38\u620f\uff09\uff0c\u9700\u8981CDN\u4fdd\u7559\u8fde\u63a5\u7a33\u5b9a\u6027\u548c\u5fc3\u8df3\u7b56\u7565\u652f\u6301\u3002<\/li>\n<\/ul>\n<h3>\u5b89\u5168\u4e0e\u52a0\u5bc6\uff1aTLS 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\u8bf7\u6c42\u3001\u5206\u6bb5\u4e0a\u4f20\uff09\u7528\u4e8e\u5927\u6587\u4ef6\u5206\u53d1\u6216\u8f6f\u4ef6\u5305\u66f4\u65b0\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u534f\u8bae\u9009\u62e9<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u573a\u666f\u5bf9\u534f\u8bae\u4e0e\u8c03\u5ea6\u7684\u4fa7\u91cd\u70b9\u4e0d\u540c\uff0c\u4ee5\u4e0b\u4e3a\u5e38\u89c1\u573a\u666f\u7684\u5efa\u8bae\uff1a<\/p>\n<h3>\u9759\u6001\u7f51\u7ad9\u4e0e\u5185\u5bb9\u5206\u53d1\uff08\u7f51\u9875\u3001\u56fe\u7247\u3001\u89c6\u9891\u5c01\u9762\uff09<\/h3>\n<ul>\n<li>\u9996\u9009HTTP\/2\u6216HTTP\/3\u4ee5\u51cf\u5c11\u5e76\u53d1\u8bf7\u6c42\u5ef6\u8fdf\uff0c\u5f00\u542fBrotli\u538b\u7f29\u4e0e\u957f\u7f13\u5b58\u7b56\u7565\u3002<\/li>\n<li>\u5728\u4e9a\u592a\u5730\u533a\u8bbf\u95ee\u5bc6\u96c6\u7684\u7ad9\u70b9\uff0c\u4f18\u5148\u9009\u62e9\u5728\u9999\u6e2f\u670d\u52a1\u5668\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u6216\u65b0\u52a0\u5761\u670d\u52a1\u5668\u6709\u8282\u70b9\u7684CDN\uff0c\u4ee5\u964d\u4f4e\u7528\u6237\u7aef\u5230\u8fb9\u7f18\u7684RTT\u3002<\/li>\n<\/ul>\n<h3>\u5927\u6587\u4ef6\/\u8f6f\u4ef6\u5206\u53d1\u4e0e\u66f4\u65b0<\/h3>\n<ul>\n<li>\u652f\u6301\u65ad\u70b9\u7eed\u4f20\u3001\u5206\u7247\u4e0b\u8f7d\u4e0e\u591a\u6e90\u5e76\u884c\uff08P2P\u7ed3\u5408CDN\uff09\u53ef\u4ee5\u63d0\u9ad8\u541e\u5410\u4e0e\u5bb9\u9519\u3002<\/li>\n<li>\u667a\u80fd\u8c03\u5ea6\u9009\u62e9\u5e26\u5bbd\u7a7a\u95f2\u7684\u56de\u6e90\u94fe\u8def\u6216\u79bb\u7528\u6237\u6700\u8fd1\u7684\u8fb9\u7f18\uff0c\u5c3d\u91cf\u907f\u514d\u8fdc\u7a0b\u56de\u6e90\u81f3\u7f8e\u56fd\u670d\u52a1\u5668\u7684\u9891\u7e41\u5f80\u8fd4\u3002<\/li>\n<\/ul>\n<h3>\u5b9e\u65f6\u4ea4\u4e92\uff08\u6e38\u620f\u3001\u5728\u7ebf\u4f1a\u8bae\u3001IM\uff09<\/h3>\n<ul>\n<li>\u4f18\u5148\u4f7f\u7528QUIC\/UDP\u4ee5\u51cf\u5c11\u5efa\u7acb\u4e0e\u6062\u590d\u7684\u5ef6\u8fdf\uff0c\u7ed3\u5408WebSocket\u6216\u57fa\u4e8eQUIC\u7684\u5b9e\u65f6\u4f20\u8f93\u5c42\u3002<\/li>\n<li>\u5b9e\u65f6\u8c03\u5ea6\u9700\u8981\u66f4\u77ed\u7684\u63a2\u6d4b\u9891\u7387\u4e0e\u5feb\u901f\u5207\u6362\u673a\u5236\uff0c\u4fdd\u8bc1\u5728\u7f51\u7edc\u6296\u52a8\u6216\u4e22\u5305\u65f6\u53ca\u65f6\u5207\u5230\u5907\u7528\u8def\u5f84\u3002<\/li>\n<\/ul>\n<h3>\u76f4\u64ad\u4e0e\u4f4e\u5ef6\u8fdf\u89c6\u9891<\/h3>\n<ul>\n<li>\u4f7f\u7528HTTP\/2\u6216HTTP\/3\u7684\u4f4e\u5ef6\u8fdf\u6d41\u65b9\u6848\uff0c\u7ed3\u5408\u8fb9\u7f18\u8f6c\u7801\u4e0e\u65c1\u8def\u76f4\u4f20\u53ef\u663e\u8457\u964d\u4f4e\u64ad\u653e\u542f\u52a8\u65f6\u95f4\u3002<\/li>\n<li>\u591a\u534f\u8bae\u5e76\u884c\uff08\u5982HTTP\/2\u7528\u4e8e\u63a7\u5236\uff0cQUIC\u7528\u4e8e\u5a92\u4f53\u6d41\uff09\u53ef\u4ee5\u517c\u987e\u517c\u5bb9\u6027\u4e0e\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u591a\u534f\u8bae+\u667a\u80fd\u8c03\u5ea6 vs \u5355\u534f\u8bae\u9759\u6001\u8c03\u5ea6<\/h2>\n<p>\u91c7\u7528\u591a\u534f\u8bae\u652f\u6301\u4e0e\u667a\u80fd\u8c03\u5ea6\u5e26\u6765\u7684\u5173\u952e\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u8fde\u63a5\u5efa\u7acb\u66f4\u5feb\u3001\u6062\u590d\u66f4\u5feb<\/strong>\uff1aQUIC + TLS 1.3 + 0-RTT \u663e\u8457\u51cf\u5c11\u521d\u6b21\u4e0e\u91cd\u8fde\u65f6\u95f4\uff0c\u5c24\u5176\u5bf9\u79fb\u52a8\u7528\u6237\u548c\u8de8\u5883\u8bbf\u95ee\u6709\u4f18\u52bf\u3002<\/li>\n<li><strong>\u4e22\u5305\u4e0e\u6296\u52a8\u4e0b\u8868\u73b0\u66f4\u7a33<\/strong>\uff1aQUIC \u7684\u62e5\u585e\u63a7\u5236\u4e0e\u66f4\u7ec6\u7c92\u5ea6\u7684\u6d41\u63a7\u5236\u80fd\u5728\u4e0d\u53ef\u9760\u94fe\u8def\u4e2d\u4fdd\u6301\u66f4\u9ad8\u541e\u5410\uff0c\u76f8\u6bd4TCP\u5728\u9ad8\u4e22\u5305\u7f51\u7edc\u66f4\u9c81\u68d2\u3002<\/li>\n<li><strong>\u5c31\u8fd1\u63a5\u5165\u4e0e\u667a\u80fd\u5207\u6362<\/strong>\uff1aAnycast + GeoDNS + 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