{"id":209583,"date":"2025-10-23T18:02:00","date_gmt":"2025-10-23T10:02:00","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209583\/"},"modified":"2025-10-23T18:02:01","modified_gmt":"2025-10-23T10:02:01","slug":"cdn-48","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209583\/","title":{"rendered":"CDN\u7834\u89e3\u8de8\u5883\u8bbf\u95ee\u74f6\u9888\uff1a\u63d0\u901f\u4e0e\u7a33\u5b9a\u7684\u5b9e\u6218\u65b9\u6848"},"content":{"rendered":"<p>\u8de8\u5883\u7f51\u7ad9\u8bbf\u95ee\u5e38\u9762\u4e34\u5ef6\u8fdf\u9ad8\u3001\u4e22\u5305\u7387\u9ad8\u3001\u7a33\u5b9a\u6027\u5dee\u7b49\u95ee\u9898\uff0c\u5c24\u5176\u662f\u4ece\u56fd\u5185\u6216\u4e9a\u592a\u5f80\u6b27\u7f8e\u53cd\u5411\u8bbf\u95ee\u65f6\u66f4\u4e3a\u660e\u663e\u3002\u672c\u6587\u4ece\u6280\u672f\u539f\u7406\u5230\u5b9e\u6218\u914d\u7f6e\uff0c\u7cfb\u7edf\u8bb2\u89e3\u5982\u4f55\u901a\u8fc7 <strong>CDN<\/strong> 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Presence\uff09\u8282\u70b9\uff0c\u5b9e\u73b0\u5c31\u8fd1\u54cd\u5e94\u3002\u5bf9\u4e8e\u8de8\u5883\u573a\u666f\uff0c\u6838\u5fc3\u6280\u672f\u8981\u70b9\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>Anycast \u8def\u7531\u4e0e\u591a\u5bbf\u4e3b\u63a5\u5165<\/strong>\uff1aAnycast \u5c06\u540c\u4e00 IP \u5728\u591a\u4e2a PoP \u6ce8\u518c\uff0c\u7528\u6237\u8bf7\u6c42\u88ab\u8def\u7531\u5230\u6700\u8fd1 \/ \u6700\u4f18\u7684\u8282\u70b9\uff0c\u51cf\u5c11 DNS \u89e3\u6790\u540e\u5230\u9996\u5305\u65f6\u95f4\u3002\u591a\u5bbf\u4e3b\u63a5\u5165\uff08\u591a\u516c\u7f51\u51fa\u53e3\uff09\u53ef\u63d0\u9ad8\u6297\u4e22\u5305\u80fd\u529b\u4e0e\u8def\u7531\u5197\u4f59\u3002<\/li>\n<li><strong>\u8fb9\u7f18\u7f13\u5b58\u4e0e\u7f13\u5b58\u7b56\u7565<\/strong>\uff1a\u5408\u7406\u8bbe\u8ba1 Cache-Control\u3001ETag\u3001Expires \u4e0e Cache Key\uff08\u5305\u62ec Query String\u3001Cookie \u7b56\u7565\uff09\u4ee5\u51cf\u5c11\u56de\u6e90\u8bf7\u6c42\u3002\u5bf9\u8de8\u5883\u9759\u6001\u8d44\u6e90\uff08JS\/CSS\/\u56fe\u7247\/\u89c6\u9891\uff09\uff0c\u63d0\u9ad8\u7f13\u5b58\u547d\u4e2d\u7387\u662f\u6700\u76f4\u63a5\u7684\u63d0\u901f\u624b\u6bb5\u3002<\/li>\n<li><strong>\u52a8\u6001\u52a0\u901f\u4e0e\u667a\u80fd\u8def\u7531<\/strong>\uff1a\u52a8\u6001\u5185\u5bb9\u65e0\u6cd5\u7f13\u5b58\u65f6\uff0c\u4f7f\u7528 TCP \u4f18\u5316\uff08\u5982 BBR \u62e5\u585e\u63a7\u5236\uff09\u3001TCP \u8fde\u63a5\u590d\u7528\u3001\u957f\u8fde\u63a5\u3001\u4ee5\u53ca\u667a\u80fd\u56de\u6e90\u94fe\u8def\u9009\u62e9\uff08\u4f18\u5148\u8d70\u4f4e\u5ef6\u8fdf\u4e2d\u8f6c\u70b9\uff09\u80fd\u663e\u8457\u964d\u4f4e\u54cd\u5e94\u65f6\u95f4\u3002<\/li>\n<li><strong>\u4f20\u8f93\u5c42\u4f18\u5316\uff1aHTTP\/2\u3001HTTP\/3\uff08QUIC\uff09\u4e0e TLS 0-RTT<\/strong>\uff1aHTTP\/2 \u7684\u591a\u8def\u590d\u7528\u51cf\u5c11\u4e86\u5e76\u53d1\u8bf7\u6c42\u7684\u8fde\u63a5\u5f00\u9500\uff1bHTTP\/3 \u57fa\u4e8e QUIC \u7684 UDP \u591a\u8def\u590d\u7528\u53ef\u5728\u9ad8\u4e22\u5305\u94fe\u8def\u4e0a\u66f4\u7a33\u5b9a\uff1bTLS 0-RTT \u80fd\u5728\u91cd\u8fde\u65f6\u51cf\u5c11\u5355\u6b21\u5f80\u8fd4\u3002<\/li>\n<li><strong>\u538b\u7f29\u4e0e\u8d44\u6e90\u9884\u5904\u7406<\/strong>\uff1a\u542f\u7528 Gzip\/Brotli\u3001\u56fe\u7247 WebP\/AVIF \u8f6c\u7801\u3001\u8d44\u6e90\u5408\u5e76\/\u61d2\u52a0\u8f7d\u4e0e\u9aa8\u67b6\u5c4f\u7b56\u7565\uff0c\u51cf\u5c11\u8de8\u5883\u5e26\u5bbd\u5360\u7528\u5e76\u63d0\u5347\u9996\u5c4f\u4f53\u9a8c\u3002<\/li>\n<li><strong>\u8fb9\u7f18\u8ba1\u7b97\u80fd\u529b<\/strong>\uff1a\u5728\u8fb9\u7f18\u505a\u8bf7\u6c42\u91cd\u5199\u3001\u8ba4\u8bc1\u3001A\/B \u6d4b\u8bd5\u6216\u90e8\u5206\u4e1a\u52a1\u903b\u8f91\u80fd\u591f\u907f\u514d\u9891\u7e41\u56de\u6e90\uff0c\u964d\u4f4e\u8de8\u5883\u56de\u6e90\u5e26\u6765\u7684\u5ef6\u8fdf\u548c\u4e0d\u7a33\u5b9a\u98ce\u9669\u3002<\/li>\n<\/ul>\n<h2>\u8de8\u5883 CDN \u7684\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u6218\u505a\u6cd5<\/h2>\n<h3>\u9759\u6001\u8d44\u6e90\u5206\u53d1\uff08\u9996\u9009\uff09<\/h3>\n<p>\u628a\u56fe\u7247\u3001\u811a\u672c\u3001\u6837\u5f0f\u8868\u3001\u89c6\u9891\u7247\u6bb5\u4e00\u7c7b\u7684\u9759\u6001\u6587\u4ef6\u5168\u90e8\u4e0a CDN\u3002\u5173\u952e\u70b9\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u7edf\u4e00\u7684\u57df\u540d\uff08\u5982 static.example.com\uff09\uff0c\u5e76\u4e3a\u5176\u914d\u7f6e CNAME \u6307\u5411 CDN \u63d0\u4f9b\u5546\uff1b\u5728 DNS \u4e0a\u8bbe\u7f6e\u8f83\u77ed\u7684 TTL \u65b9\u4fbf\u5207\u6362\u3002<\/li>\n<li>\u5408\u7406\u8bbe\u7f6e Cache-Control\uff08\u4f8b\u5982\u5bf9\u957f\u671f\u53d8\u66f4\u7684\u9759\u6001\u8d44\u6e90\u8bbe\u7f6e max-age=31536000 \u5e76\u914d\u5408\u7248\u672c\u53f7\uff09\uff0c\u907f\u514d\u9891\u7e41\u56de\u6e90\u3002<\/li>\n<li>\u5f00\u542f Brotli \u538b\u7f29\u548c\u56fe\u7247\u81ea\u52a8\u683c\u5f0f\u8f6c\u6362\uff08\u6839\u636e\u5ba2\u6237\u7aef\u652f\u6301\u8fd4\u56de WebP\/AVIF\uff09\uff0c\u663e\u8457\u964d\u4f4e\u8de8\u5883\u5b57\u8282\u6570\u3002<\/li>\n<\/ul>\n<h3>\u52a8\u6001\u63a5\u53e3\u52a0\u901f<\/h3>\n<p>\u5bf9\u4e8e API \u6216\u9700\u8981\u56de\u6e90\u7684\u52a8\u6001\u9875\u9762\uff0c\u91c7\u7528\u4ee5\u4e0b\u7b56\u7565\uff1a<\/p>\n<ul>\n<li>\u5728\u8fb9\u7f18\u542f\u7528 TCP \u4f18\u5316\u4e0e\u8fde\u63a5\u6c60\u5316\uff0c\u914d\u7f6e\u957f\u8fde\u63a5\u548c\u9002\u5f53\u7684 Keep-Alive \u53c2\u6570\uff0c\u51cf\u5c11\u63e1\u624b\u5e26\u6765\u7684\u5ef6\u8fdf\u3002<\/li>\n<li>\u5bf9\u5e38\u89c1\u4f46\u9891\u7e41\u53d8\u66f4\u7684\u6570\u636e\u4f7f\u7528\u77ed\u671f\u7f13\u5b58\u6216\u8fb9\u7f18\u7f13\u5b58\uff08stale-while-revalidate\u3001stale-if-error\uff09\u4ee5\u5728\u56de\u6e90\u5931\u8d25\u65f6\u4ecd\u63d0\u4f9b\u53ef\u7528\u54cd\u5e94\u3002<\/li>\n<li>\u90e8\u7f72\u667a\u80fd\u56de\u6e90\u7b56\u7565\uff1a\u5bf9\u8de8\u5883\u56de\u6e90\u4f18\u5148\u9009\u62e9\u5ef6\u8fdf\u66f4\u4f4e\u7684\u4e2d\u7ee7\u70b9\uff08\u5982\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u65b0\u52a0\u5761\uff09\uff0c\u6216\u4f7f\u7528\u591a\u6e90\u56de\u6e90\uff08\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u5b9e\u73b0\u5c31\u8fd1\u56de\u6e90\u3002<\/li>\n<\/ul>\n<h3>\u89c6\u9891\u6d41\u4e0e\u5927\u6587\u4ef6\u4e0b\u8f7d<\/h3>\n<p>\u89c6\u9891\u548c\u5927\u6587\u4ef6\u5f3a\u8c03\u5e26\u5bbd\u4e0e\u7a33\u5b9a\u6027\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u5206\u7247\u4e0b\u8f7d\uff08range \u8bf7\u6c42\uff09\u914d\u5408\u8fb9\u7f18\u7f13\u5b58\uff0c\u907f\u514d\u5355\u4e2a\u8282\u70b9\u6210\u4e3a\u74f6\u9888\u3002<\/li>\n<li>CDN \u4e0e\u5206\u53d1\u7b56\u7565\u9700\u7ed3\u5408 ISP \u4e92\u8054\u4e0e BGP \u4f18\u5316\uff0c\u4ee5\u4fdd\u8bc1\u5728\u8de8\u5883\u94fe\u8def\u62e5\u585e\u65f6\u4ecd\u80fd\u63d0\u4f9b\u5e73\u6ed1\u64ad\u653e\u4f53\u9a8c\u3002<\/li>\n<li>\u8003\u8651\u591a\u673a\u623f\u5206\u53d1\uff1a\u4f8b\u5982\u628a\u6e05\u6670\u5ea6\u8f83\u4f4e\u7684\u7248\u672c\u653e\u5728\u65e5\u672c\u670d\u52a1\u5668\/\u9999\u6e2f\u670d\u52a1\u5668\u8282\u70b9\u4ee5\u6ee1\u8db3\u4e9a\u592a\u7528\u6237\uff0c\u800c\u66f4\u9ad8\u6e05\u7248\u672c\u653e\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u8282\u70b9\u4ee5\u670d\u52a1\u7f8e\u6d32\u7528\u6237\u3002<\/li>\n<\/ul>\n<h2>\u8de8\u5883 CDN \u4e0e\u4f20\u7edf\u76f4\u8fde\/\u4e13\u7ebf\u7684\u4f18\u52bf\u5bf9\u6bd4<\/h2>\n<p>\u5728\u9009\u62e9\u89e3\u51b3\u65b9\u6848\u65f6\uff0c\u5e38\u89c1\u6bd4\u8f83\u5bf9\u8c61\u4e3a 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CDN\u3002<\/li>\n<li><strong>\u5355\u70b9\u6d77\u5916\u670d\u52a1\u5668\uff08\u5982\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\uff09<\/strong>\uff1a\u90e8\u7f72\u7b80\u5355\u3001\u6210\u672c\u4f4e\uff0c\u9002\u5408\u8f7b\u91cf\u5e94\u7528\u6216\u5f00\u53d1\u6d4b\u8bd5\uff0c\u4f46\u65e0\u6cd5\u8986\u76d6\u5168\u7403\u7528\u6237\u7684\u5c31\u8fd1\u8bbf\u95ee\u9700\u6c42\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u6700\u4f73\u5b9e\u8df5\u901a\u5e38\u662f\u201c\u8fb9\u7f18 CDN + \u591a\u5730\u57df\u6e90\u7ad9\u201d\u7ed3\u5408\uff1a\u5728\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u9996\u5c14\u3001\u65b0\u52a0\u5761\u7b49\u4e9a\u592a\u91cd\u8981\u8282\u70b9\u4e0e\u7f8e\u56fd\u3001\u6b27\u6d32\u8282\u70b9\u5171\u540c\u5e03\u5c40\uff0c\u4ee5\u517c\u987e\u4e0d\u540c\u533a\u57df\u7684\u8bbf\u95ee\u4f53\u9a8c\u3002<\/p>\n<h2>\u9009\u8d2d\u5efa\u8bae\uff1a\u5982\u4f55\u4e3a\u8de8\u5883\u8bbf\u95ee\u6311\u9009 CDN \u4e0e\u6d77\u5916\u670d\u52a1\u5668<\/h2>\n<p>\u5728\u9009\u62e9 CDN 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