{"id":210245,"date":"2025-10-24T09:03:19","date_gmt":"2025-10-24T01:03:19","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210245\/"},"modified":"2025-10-24T09:03:21","modified_gmt":"2025-10-24T01:03:21","slug":"cdn-334","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210245\/","title":{"rendered":"CDN\u9a71\u52a8\u77ed\u89c6\u9891\u9769\u65b0\uff1a\u79d2\u5f00\u3001\u4f4e\u5ef6\u8fdf\u4e0e\u667a\u80fd\u5206\u53d1\u7684\u4e0b\u4e00\u6b65"},"content":{"rendered":"<p>\u5728\u77ed\u89c6\u9891\u6210\u4e3a\u6d41\u91cf\u548c\u6ce8\u610f\u529b\u4e89\u593a\u4e3b\u6218\u573a\u7684\u4eca\u5929\uff0c\u7528\u6237\u5bf9\u201c\u79d2\u5f00\u201d\u3001\u201c\u4f4e\u5ef6\u8fdf\u201d\u548c\u6d41\u7545\u4f53\u9a8c\u7684\u671f\u671b\u6781\u9ad8\u3002\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u4f5c\u4e3a\u8fde\u63a5\u6e90\u7ad9\u548c\u7ec8\u7aef\u7528\u6237\u7684\u5173\u952e\u4e2d\u67a2\uff0c\u6b63\u901a\u8fc7\u67b6\u6784\u6f14\u8fdb\u4e0e\u667a\u80fd\u5316\u80fd\u529b\u9a71\u52a8\u77ed\u89c6\u9891\u4f53\u9a8c\u7684\u4e0b\u4e00\u8f6e\u9769\u65b0\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u6df1\u5165\u5256\u6790 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\u6216\u4e8c\u7ea7\u7f13\u5b58\u6709\u6548\u7f13\u89e3\u6e90\u7ad9\u538b\u529b\uff0c\u5c24\u5176\u9002\u5408\u9ad8\u5e76\u53d1\u77ed\u89c6\u9891\u70ed\u6f6e\u3002<\/li>\n<\/ul>\n<h3>\u4f20\u8f93\u534f\u8bae\u4e0e\u62e5\u585e\u63a7\u5236<\/h3>\n<ul>\n<li>HTTP\/2 \u548c QUIC\uff08HTTP\/3\uff09\u80fd\u663e\u8457\u51cf\u5c11\u8fde\u63a5\u5efa\u7acb\u65f6\u5ef6\u4e0e\u5934\u90e8\u5f00\u9500\uff0c\u5bf9\u77ed\u89c6\u9891\u79d2\u5f00\u6709\u76f4\u63a5\u52a0\u6210\u3002QUIC \u5728\u4e22\u5305\u73af\u5883\u4e0b\u6062\u590d\u901f\u5ea6\u66f4\u5feb\uff0c\u9002\u5408\u79fb\u52a8\u7f51\u7edc\u3002<\/li>\n<li>\u5728\u4f20\u8f93\u5c42\u91c7\u7528\u73b0\u4ee3\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\uff08\u5982 BBR\uff09\u4e0e\u591a\u8def\u5f84\u7b56\u7565\uff0c\u53ef\u5728\u6ce2\u52a8\u7f51\u7edc\u73af\u5883\u4e0b\u7ef4\u6301\u7a33\u5b9a\u5e26\u5bbd\uff0c\u964d\u4f4e\u5361\u987f\u3002<\/li>\n<\/ul>\n<h3>\u4f4e\u5ef6\u8fdf\u6d41\u5a92\u4f53\u6280\u672f<\/h3>\n<ul>\n<li>\u4f4e\u5ef6\u8fdf HLS \/ Low-Latency DASH \u4e0e CMAF \u7684\u7ed3\u5408\uff0c\u51cf\u5c11\u7247\u6bb5\u5927\u5c0f\u4e0e\u64ad\u653e\u7f13\u51b2\u957f\u5ea6\uff0c\u5b9e\u73b0\u63a5\u8fd1\u5b9e\u65f6\u7684\u4f20\u8f93\u3002<\/li>\n<li>\u5207\u7247\u5316\u4e0e chunked transfer encoding \u7684\u914d\u5408\uff0c\u4f7f\u64ad\u653e\u5668\u80fd\u66f4\u65e9\u89e3\u6790\u5e76\u64ad\u653e\u9996\u4e2a\u6570\u636e\u5757\u3002<\/li>\n<\/ul>\n<h3>\u667a\u80fd\u5206\u53d1\u4e0e\u8fb9\u7f18\u8ba1\u7b97<\/h3>\n<ul>\n<li>\u57fa\u4e8e\u8bbf\u95ee\u65e5\u5fd7\u4e0e\u7528\u6237\u884c\u4e3a\u7684<strong>\u9884\u6d4b\u6027\u7f13\u5b58<\/strong>\uff08Predictive Caching\uff09\u5728\u79d2\u5f00\u54cd\u5e94\u4e2d\u975e\u5e38\u5173\u952e\u3002\u673a\u5668\u5b66\u4e60\u6a21\u578b\u53ef\u9884\u6d4b\u672a\u6765\u70ed\u95e8\u77ed\u89c6\u9891\u5e76\u63d0\u524d\u4e0b\u53d1\u5230\u8fb9\u7f18\u8282\u70b9\u3002<\/li>\n<li>\u8fb9\u7f18\u8ba1\u7b97\uff08Edge Compute\uff09\u53ef\u5728 CDN \u8282\u70b9\u6267\u884c\u5b9e\u65f6\u8f6c\u7801\u3001\u5c01\u88c5\u6216\u6c34\u5370\u7b49\u5904\u7406\uff0c\u51cf\u5c11\u56de\u6e90\u5e76\u7f29\u77ed\u7aef\u5230\u7aef\u65f6\u5ef6\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u6280\u672f\u5b9e\u73b0\u7ec6\u8282<\/h2>\n<h3>\u70ed\u70b9\u89c6\u9891\u7a81\u7136\u7206\u53d1\uff08\u6d3b\u52a8\u3001\u6311\u6218\u8d5b\u7b49\uff09<\/h3>\n<p>\u5728\u6d41\u91cf\u7206\u53d1\u573a\u666f\uff0c\u91c7\u7528 Anycast \u8def\u7531\u4e0e\u5f39\u6027\u6269\u5bb9\u7684 CDN \u8282\u70b9\u80fd\u8fc5\u901f\u5c06\u8bf7\u6c42\u5206\u6563\u5230\u6700\u8fd1\u7684\u8282\u70b9\u3002\u7ed3\u5408 Origin Shield\u3001\u56de\u6e90\u9650\u6d41\u4e0e\u5206\u5c42\u7f13\u5b58\u7b56\u7565\uff0c\u53ef\u4ee5\u907f\u514d\u6e90\u7ad9\u8fc7\u8f7d\u3002\u5efa\u8bae\u5c06\u654f\u611f\u6e90\u7ad9\u90e8\u7f72\u4e8e\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u7b49\u5730\u7406\u4e0a\u63a5\u8fd1\u4e3b\u8981\u7528\u6237\u7fa4\u7684\u673a\u623f\uff0c\u4ee5\u7f29\u77ed\u56de\u6e90 RTT\u3002<\/p>\n<h3>\u76f4\u64ad\u4e0e\u793e\u4ea4\u4e92\u52a8\u77ed\u89c6\u9891<\/h3>\n<p>\u76f4\u64ad\u573a\u666f\u5bf9\u5ef6\u8fdf\u66f4\u654f\u611f\uff0cCDN \u9700\u8981\u652f\u6301\u4f4e\u5ef6\u8fdf\u4f20\u8f93\u534f\u8bae\u3001\u7aef\u5230\u7aef\u94fe\u8def\u4f18\u5316\u4e0e ACK \u805a\u5408\u7b56\u7565\u3002\u5e38\u89c1\u505a\u6cd5\u662f\u4f7f\u7528 WebRTC \u6216\u57fa\u4e8e SRT \u7684\u4f20\u8f93\u5230\u8fb9\u7f18\uff0c\u518d\u7531 CDN \u505a\u5206\u53d1\uff0c\u8fd9\u6837\u65e2\u6ee1\u8db3\u4e92\u52a8\u5ef6\u8fdf\u8981\u6c42\uff0c\u53c8\u5229\u4e8e\u89c4\u6a21\u5316\u5206\u53d1\u3002<\/p>\n<h3>\u56fd\u9645\u5316\u5206\u53d1\u4e0e\u5408\u89c4<\/h3>\n<p>\u77ed\u89c6\u9891\u4ea7\u54c1\u5f80\u5f80\u9700\u8981\u8986\u76d6\u591a\u8bed\u8a00\u3001\u591a\u5730\u533a\u7528\u6237\u3002\u901a\u8fc7\u5728\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\u7b49\u5730\u533a\u90e8\u7f72\u8fb9\u7f18\u8282\u70b9\u6216\u63a5\u5165\u70b9\uff0c\u53ef\u63d0\u5347\u5f53\u5730\u7528\u6237\u4f53\u9a8c\u5e76\u6ee1\u8db3\u6570\u636e\u5408\u89c4\u9700\u6c42\u3002\u540c\u65f6\uff0c\u6d77\u5916\u670d\u52a1\u5668\u8282\u70b9\u4e0e\u4f18\u8d28 DNS\uff08\u57df\u540d\u6ce8\u518c\u4e0e\u89e3\u6790\u7b56\u7565\uff09\u5171\u540c\u4f5c\u7528\uff0c\u80fd\u51cf\u5c11\u9996\u6b21\u89e3\u6790\u5ef6\u8fdf\u4e0e\u8de8\u56fd RTT\u3002<\/p>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u4f20\u7edf CDN \u4e0e\u9762\u5411\u77ed\u89c6\u9891\u7684\u73b0\u4ee3 CDN<\/h2>\n<p><strong>\u4f20\u7edf CDN<\/strong>\u4fa7\u91cd\u9759\u6001\u5185\u5bb9\u7f13\u5b58\u3001\u8282\u7701\u5e26\u5bbd\uff1b\u800c\u9762\u5411\u77ed\u89c6\u9891\u7684\u73b0\u4ee3 CDN \u5219\u5728\u4ee5\u4e0b\u65b9\u9762\u66f4\u5177\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li>\u66f4\u7ec6\u7c92\u5ea6\u7684\u7f13\u5b58\u5355\u5143\uff08\u5207\u7247\u7ea7\u3001chunk \u7ea7\uff09\uff0c\u9002\u5408 ABR\uff08\u81ea\u9002\u5e94\u7801\u7387\uff09\u64ad\u653e\u3002<\/li>\n<li>\u652f\u6301\u8fb9\u7f18\u667a\u80fd\uff08\u5b9e\u65f6\u8f6c\u7801\u4e0e\u4e2a\u6027\u5316\uff09\uff0c\u51cf\u5c11\u56de\u6e90\u4e0e\u5e26\u5bbd\u6d88\u8017\u3002<\/li>\n<li>\u534f\u8bae\u5c42\u5347\u7ea7\uff08QUIC\/HTTP3\uff09\u4e0e\u62e5\u585e\u63a7\u5236\u6539\u8fdb\uff0c\u63d0\u9ad8\u79fb\u52a8\u4e0e\u4e22\u5305\u73af\u5883\u4e0b\u7684\u4f53\u9a8c\u3002<\/li>\n<li>\u4e0e\u4e91\u539f\u751f\u5de5\u4f5c\u6d41\u7ed3\u5408\uff0c\u652f\u6301\u5bb9\u5668\u5316\u8f6c\u7801\u3001Serverless \u8ba1\u7b97\uff0c\u4fbf\u4e8e\u5728\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS \u7b49\u7075\u6d3b\u73af\u5883\u4e2d\u90e8\u7f72\u8fb9\u7f18\u670d\u52a1\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u5efa\u8bae\uff1a\u5982\u4f55\u4e3a\u77ed\u89c6\u9891\u9009\u62e9\u5408\u9002\u7684 CDN \u4e0e\u670d\u52a1\u5668<\/h2>\n<p>\u5728\u9009\u8d2d CDN \u670d\u52a1\u6216\u81ea\u5efa\u6df7\u5408\u5206\u53d1\u67b6\u6784\u65f6\uff0c\u5e94\u4ece\u4ee5\u4e0b\u7ef4\u5ea6\u8bc4\u4f30\uff1a<\/p>\n<h3>1. \u7f51\u7edc\u8986\u76d6\u4e0e\u8282\u70b9\u5206\u5e03<\/h3>\n<p>\u4f18\u5148\u8003\u8651\u5728\u76ee\u6807\u7528\u6237\u5bc6\u96c6\u533a\u57df\uff08\u5982\u9999\u6e2f\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u3001\u7f8e\u56fd\uff09\u5177\u5907\u5145\u8db3\u8fb9\u7f18\u8282\u70b9\u7684 CDN\u3002\u5bf9\u4e9a\u592a\u5730\u533a\u7528\u6237\uff0c\u90e8\u7f72\u9999\u6e2f\u670d\u52a1\u5668 \u6216 \u65b0\u52a0\u5761\u8282\u70b9\u80fd\u663e\u8457\u964d\u4f4e\u5ef6\u8fdf\u3002<\/p>\n<h3>2. \u534f\u8bae\u652f\u6301\u4e0e\u64ad\u653e\u5668\u517c\u5bb9\u6027<\/h3>\n<p>\u786e\u8ba4 CDN \u662f\u5426\u652f\u6301 HTTP\/2\u3001QUIC \u53ca\u4f4e\u5ef6\u8fdf HLS\/DASH\u3002\u64ad\u653e\u5668\u7aef\u7684 ABR \u7b56\u7565\u5e94\u4e0e CDN \u5207\u7247\u914d\u7f6e\u4e00\u81f4\uff0c\u4ee5\u907f\u514d\u989d\u5916\u62c9\u6d41\u4e0e\u5361\u987f\u3002<\/p>\n<h3>3. \u667a\u80fd\u7f13\u5b58\u4e0e\u9884\u6d4b\u80fd\u529b<\/h3>\n<p>\u8bc4\u4f30 CDN \u662f\u5426\u5177\u5907\u9884\u6d4b\u6027\u7f13\u5b58\u3001\u57fa\u4e8e\u6d41\u91cf\u9884\u6d4b\u7684\u9884\u70ed\u4e0e\u8fb9\u7f18\u9884\u53d6\u80fd\u529b\uff0c\u8fd9\u4e9b\u80fd\u529b\u76f4\u63a5\u5173\u7cfb\u5230\u201c\u79d2\u5f00\u201d\u4f53\u9a8c\u3002<\/p>\n<h3>4. \u8fb9\u7f18\u8ba1\u7b97\u4e0e\u5b9e\u65f6\u5904\u7406\u80fd\u529b<\/h3>\n<p>\u82e5\u9700\u8981\u5b9e\u65f6\u6ee4\u955c\u3001\u8f6c\u7801\u3001\u6c34\u5370\u7b49\u529f\u80fd\uff0c\u9009\u62e9\u652f\u6301\u8fb9\u7f18\u51fd\u6570\u6216\u8fb9\u7f18\u5bb9\u5668\u7684 CDN\uff0c\u5c06\u53ef\u5c06\u5904\u7406\u903b\u8f91\u4e0b\u6c89\u81f3\u8fb9\u7f18\uff0c\u51cf\u5c11\u56de\u6e90\u4e0e\u5904\u7406\u65f6\u5ef6\u3002<\/p>\n<h3>5. \u5b89\u5168\u4e0e\u5408\u89c4<\/h3>\n<p>\u77ed\u89c6\u9891\u6d89\u53ca\u5927\u91cf\u7528\u6237\u751f\u6210\u5185\u5bb9\uff08UGC\uff09\uff0c\u8981\u5173\u6ce8 DDoS \u9632\u62a4\u3001WAF \u4e0e\u5185\u5bb9\u5ba1\u6838 API \u7684\u63a5\u5165\uff0c\u540c\u65f6\u8003\u8651\u6240\u5728\u56fd\u5bb6\/\u5730\u533a\u7684\u5185\u5bb9\u4e0e\u6570\u636e\u5408\u89c4\u6027\u3002<\/p>\n<h3>6. 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