{"id":210257,"date":"2025-10-24T09:33:38","date_gmt":"2025-10-24T01:33:38","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210257\/"},"modified":"2025-10-24T09:33:39","modified_gmt":"2025-10-24T01:33:39","slug":"cdn-340","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210257\/","title":{"rendered":"CDN\u7f13\u5b58\u4e0e\u8def\u7531\u667a\u80fd\u5316\uff1a\u5f00\u542f\u7f51\u7edc\u52a0\u901f\u7684\u65b0\u7eaa\u5143"},"content":{"rendered":"<p>\u5728\u5168\u7403\u4e92\u8054\u7f51\u67b6\u6784\u65e5\u76ca\u590d\u6742\u4e0e\u7528\u6237\u4f53\u9a8c\u8981\u6c42\u4e0d\u65ad\u63d0\u5347\u7684\u4eca\u5929\uff0c\u5355\u7eaf\u4f9d\u8d56\u6e90\u7ad9\u548c\u4f20\u7edf\u8def\u7531\u5df2\u96be\u4ee5\u6ee1\u8db3\u4f4e\u5ef6\u8fdf\u3001\u9ad8\u5e76\u53d1\u4ee5\u53ca\u7a33\u5b9a\u6027\u7684\u9700\u6c42\u3002\u901a\u8fc7\u7ed3\u5408CDN\u7f13\u5b58\u7b56\u7565\u4e0e\u8def\u7531\u667a\u80fd\u5316\u6280\u672f\uff0c\u7f51\u7ad9\u548c\u5e94\u7528\u53ef\u4ee5\u5728\u591a\u533a\u57df\u3001\u591a\u7f51\u7edc\u73af\u5883\u4e2d\u5b9e\u73b0\u663e\u8457\u7684\u52a0\u901f\u4e0e\u53ef\u9760\u6027\u63d0\u5347\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u6df1\u5165\u5256\u6790CDN\u7f13\u5b58\u539f\u7406\u3001\u8def\u7531\u667a\u80fd\u5316\u5b9e\u73b0\u624b\u6bb5\u3001\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u9009\u8d2d\u5efa\u8bae\uff0c\u5e2e\u52a9\u60a8\u5728\u90e8\u7f72\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u6d77\u5916\u670d\u52a1\u5668\u65f6\u6784\u5efa\u66f4\u9ad8\u6548\u7684\u4ea4\u4ed8\u4f53\u7cfb\u3002<\/p>\n<h2>CDN\u7f13\u5b58\u7684\u6838\u5fc3\u539f\u7406\u4e0e\u5173\u952e\u6280\u672f\u7ec6\u8282<\/h2>\n<p>CDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u901a\u8fc7\u5c06\u5185\u5bb9\u5206\u53d1\u5230\u904d\u5e03\u5168\u7403\u7684\u8fb9\u7f18\u8282\u70b9\uff08PoP\uff09\u6765\u7f29\u77ed\u7ec8\u7aef\u7528\u6237\u5230\u5185\u5bb9\u7684\u7269\u7406\u4e0e\u7f51\u7edc\u8ddd\u79bb\uff0c\u4ece\u800c\u964d\u4f4e\u5ef6\u8fdf\u5e76\u5206\u62c5\u6e90\u7ad9\u538b\u529b\u3002\u7406\u89e3CDN\u7f13\u5b58\u7684\u5de5\u4f5c\u673a\u5236\uff0c\u9700\u8981\u5173\u6ce8\u4ee5\u4e0b\u51e0\u4e2a\u6280\u672f\u70b9\uff1a<\/p>\n<h3>\u7f13\u5b58\u5bf9\u8c61\u4e0e\u7f13\u5b58\u952e\uff08Cache Key\uff09<\/h3>\n<p>\u7f13\u5b58\u952e\u51b3\u5b9a\u4e86\u54ea\u4e9b\u8bf7\u6c42\u4f1a\u547d\u4e2d\u540c\u4e00\u7f13\u5b58\u5bf9\u8c61\u3002\u5e38\u89c1\u7f13\u5b58\u952e\u5305\u542b\u534f\u8bae\u3001\u4e3b\u673a\uff08Host\uff09\u3001\u8def\u5f84\u3001\u67e5\u8be2\u5b57\u7b26\u4e32\u3001\u8bf7\u6c42\u5934\uff08\u5982 User-Agent\u3001Accept-Encoding\uff09\u3001Cookie \u7b49\u3002\u5408\u7406\u8bbe\u8ba1\u7f13\u5b58\u952e\u53ef\u4ee5\u63d0\u9ad8\u7f13\u5b58\u547d\u4e2d\u7387\u3002\u4f8b\u5982\u5bf9\u9759\u6001\u8d44\u6e90\u901a\u5e38\u5ffd\u7565 Cookie \u4e0e\u52a8\u6001\u8bf7\u6c42\u5934\uff0c\u800c\u5bf9 API \u5219\u53ef\u80fd\u9700\u8981\u7eb3\u5165 Authorization \u6216\u7279\u5b9a\u81ea\u5b9a\u4e49\u5934\u3002<\/p>\n<h3>\u7f13\u5b58\u6709\u6548\u671f\u4e0e\u7f13\u5b58\u63a7\u5236\u7b56\u7565<\/h3>\n<p>\u7f13\u5b58\u4e3b\u8981\u4f9d\u8d56 HTTP 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Includes\uff09\u62c6\u5206\u7247\u6bb5\u7f13\u5b58\u3002<\/p>\n<h3>\u52a8\u6001\u5185\u5bb9\u7f13\u5b58\u4e0e\u8fb9\u7f18\u8ba1\u7b97<\/h3>\n<p>\u5bf9\u4e8e\u52a8\u6001\u5185\u5bb9\uff0c\u53ef\u4ee5\u91c7\u7528\u5206\u6bb5\u7f13\u5b58\u3001\u7f13\u5b58\u53d8\u4f53\uff08Vary\uff09\u6216\u5728\u8fb9\u7f18\u6267\u884c\u8f7b\u91cf\u903b\u8f91\uff08\u5982 A\/B \u8def\u7531\u3001\u7528\u6237\u9274\u6743\u7f13\u5b58\u3001\u54cd\u5e94\u5408\u6210\uff09\u3002\u73b0\u4ee3CDN \u63d0\u4f9b\u7c7b\u4f3c\u4e8e Cloudflare Workers\u3001AWS Lambda@Edge \u7684\u8fb9\u7f18\u8ba1\u7b97\u80fd\u529b\uff0c\u5141\u8bb8\u5728\u8fb9\u7f18\u5c42\u8fdb\u884c\u8bf7\u6c42\u6539\u5199\u3001HTML \u9884\u6e32\u67d3\u6216\u90e8\u5206\u6570\u636e\u805a\u5408\uff0c\u4ece\u800c\u5c06\u53ef\u7f13\u5b58\u7387\u6700\u5927\u5316\u3002<\/p>\n<h2>\u8def\u7531\u667a\u80fd\u5316\u7684\u5b9e\u73b0\u624b\u6bb5\u4e0e\u5173\u952e\u6307\u6807<\/h2>\n<p>\u8def\u7531\u667a\u80fd\u5316\u4e3b\u8981\u6307\u901a\u8fc7\u5b9e\u65f6\u6d4b\u91cf\u3001\u7b56\u7565\u51b3\u7b56\u4e0e\u5feb\u901f\u8def\u5f84\u9009\u62e9\u6765\u4f18\u5316\u7f51\u7edc\u6d41\u91cf\u8d70\u5411\uff0c\u5e38\u89c1\u5b9e\u73b0\u5305\u62ec Anycast\u3001BGP \u4f18\u5316\u3001SD-WAN\u3001\u4ee5\u53ca\u591a CDN \u8c03\u5ea6\u3002\u5176\u76ee\u6807\u662f\u63d0\u5347\u53ef\u8fbe\u6027\u3001\u964d\u4f4e\u5f80\u8fd4\u65f6\u5ef6\uff08RTT\uff09\u5e76\u63d0\u9ad8\u7f51\u7edc\u7a33\u5b9a\u6027\u3002<\/p>\n<h3>Anycast \u4e0e\u5168\u7403\u8d1f\u8f7d\u5206\u914d<\/h3>\n<p>Anycast \u901a\u8fc7\u5728\u591a\u4e2a PoP \u4f7f\u7528\u76f8\u540c IP \u5730\u5740\u5e76\u7ed3\u5408 BGP \u5c06\u6d41\u91cf\u5f15\u5bfc\u5230\u6700\u8fd1\u6216\u6700\u4f18\u7684\u8282\u70b9\uff0c\u80fd\u5b9e\u73b0\u5168\u5c40\u5c31\u8fd1\u63a5\u5165\u548c\u6545\u969c\u81ea\u52a8\u7ed5\u8f6c\u3002\u4f46 Anycast \u5728\u8de8\u8fd0\u8425\u5546\u6027\u80fd\u6ce2\u52a8\u65f6\u53ef\u80fd\u51fa\u73b0\u4e0d\u53ef\u9884\u671f\u7684\u8def\u7531\u6296\u52a8\uff0c\u56e0\u6b64\u9700\u8981\u7ed3\u5408\u6301\u7eed\u76d1\u6d4b\u4e0e BGP \u7b56\u7565\u4f18\u5316\u3002<\/p>\n<h3>BGP \u667a\u80fd\u5316\uff08BGP Optimization\uff09<\/h3>\n<p>\u901a\u8fc7\u5bf9 BGP \u793e\u533a\uff08community\uff09\u6807\u7b7e\u3001\u524d\u7f00\u957f\u5ea6\u8c03\u6574\u548c\u672c\u5730\u4f18\u5148\u7ea7\u7b49\u7b56\u7565\uff0c\u8fd0\u8425\u65b9\u53ef\u4ee5\u5f71\u54cd\u4e92\u8054\u7f51\u9aa8\u5e72\u5bf9\u6d41\u91cf\u7684\u9009\u62e9\u3002\u6b64\u5916\uff0c\u7ed3\u5408\u5b9e\u65f6\u7f51\u7edc\u6027\u80fd\u6570\u636e\uff08\u5982\u4e22\u5305\u7387\u3001\u5ef6\u8fdf\u3001\u6296\u52a8\uff09\u8fdb\u884c\u53ef\u7528\u8def\u5f84\u7684\u52a8\u6001\u8c03\u6574\uff0c\u53ef\u66f4\u597d\u5e94\u5bf9\u94fe\u8def\u8d28\u91cf\u6ce2\u52a8\u3002<\/p>\n<h3>\u591a\u94fe\u8def\/\u591a CDN \u8c03\u5ea6\uff08Multi-CDN &amp; Multi-Path\uff09<\/h3>\n<p>\u591a CDN \u7b56\u7565\u5141\u8bb8\u6839\u636e\u5730\u57df\u3001ASN\u3001\u65f6\u5ef6\u6216\u4e1a\u52a1\u7c7b\u578b\u52a8\u6001\u9009\u62e9\u4e0d\u540c\u7684 CDN \u6216\u6e90\u7ad9\uff0c\u63d0\u5347\u6574\u4f53\u53ef\u7528\u6027\u4e0e\u6027\u80fd\u3002\u667a\u80fd\u8c03\u5ea6\u5f15\u64ce\u901a\u5e38\u57fa\u4e8e\u5065\u5eb7\u68c0\u67e5\u3001\u4e3b\u52a8\u6d4b\u91cf\uff08SLA probes\uff09\u4e0e\u7194\u65ad\u903b\u8f91\u6765\u5207\u6362\u8def\u5f84\uff0c\u517c\u987e\u6027\u80fd\u4e0e\u6210\u672c\u3002\u5bf9\u4e8e\u5173\u952e\u4e1a\u52a1\uff0c\u4ea6\u53ef\u7ed3\u5408 SD-WAN \u5728\u4f01\u4e1a\u7f51\u4e0e\u516c\u6709\u4e91\u4e4b\u95f4\u5b9e\u73b0\u94fe\u8def\u805a\u5408\u4e0e\u5bb9\u707e\u3002<\/p>\n<h3>\u5173\u952e\u6027\u80fd\u6307\u6807\uff08KPI\uff09<\/h3>\n<ul>\n<li>\u7f13\u5b58\u547d\u4e2d\u7387\uff08Cache Hit Ratio\uff09\uff1a\u9ad8\u547d\u4e2d\u7387\u76f4\u63a5\u964d\u4f4e\u6e90\u7ad9\u5e26\u5bbd\u548c\u54cd\u5e94\u65f6\u95f4\u3002<\/li>\n<li>\u9996\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09\u4e0e\u9875\u9762\u52a0\u8f7d\u65f6\u95f4\uff08PLT\uff09\uff1a\u8861\u91cf\u7528\u6237\u7aef\u611f\u77e5\u7684\u5ef6\u8fdf\u3002<\/li>\n<li>\u9519\u8bef\u7387\u4e0e\u53ef\u7528\u6027\uff1a\u5305\u62ec 5xx \u9519\u8bef\u3001\u8fde\u63a5\u8d85\u65f6\u7b49\u3002<\/li>\n<li>\u5e26\u5bbd\u4e0e\u541e\u5410\u91cf\uff1a\u9488\u5bf9\u89c6\u9891\u3001\u6587\u4ef6\u5206\u53d1\u573a\u666f\u5c24\u4e3a\u5173\u952e\u3002<\/li>\n<\/ul>\n<h2>\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u73b0\u8981\u70b9<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u5bf9\u7f13\u5b58\u4e0e\u8def\u7531\u7684\u9700\u6c42\u5dee\u5f02\u8f83\u5927\uff0c\u4e0b\u9762\u6309\u5178\u578b\u573a\u666f\u7ed9\u51fa\u5b9e\u73b0\u8981\u70b9\u3002<\/p>\n<h3>\u9759\u6001\u7f51\u7ad9\u4e0e\u5185\u5bb9\u7ad9\u70b9<\/h3>\n<ul>\n<li>\u4f18\u5148\u5c06\u9759\u6001\u8d44\u6e90\uff08CSS\/JS\/\u56fe\u7247\/\u5b57\u4f53\uff09\u653e\u5728\u8fb9\u7f18\u7f13\u5b58\uff0c\u8bbe\u7f6e\u8f83\u957f\u7684 Cache-Control max-age\uff0c\u5e76\u4f7f\u7528\u5185\u5bb9\u6307\u7eb9\uff08hash\uff09\u5b9e\u73b0\u65e0\u75db\u5931\u6548\u3002<\/li>\n<li>\u542f\u7528 Brotli\/Gzip \u538b\u7f29\u4e0e HTTP\/2 \u6216 QUIC\uff08HTTP\/3\uff09\u4ee5\u51cf\u5c11\u4f20\u8f93\u65f6\u5ef6\u3002<\/li>\n<\/ul>\n<h3>\u7535\u5546\u4e0e\u52a8\u6001\u9875\u9762<\/h3>\n<ul>\n<li>\u5bf9\u9875\u9762\u8fdb\u884c\u7247\u6bb5\u5316\u7f13\u5b58\uff1a\u628a\u53ef\u7f13\u5b58\u7684\u516c\u5171\u90e8\u5206\uff08\u5982 header\/footer\u3001\u5546\u54c1\u56fe\uff09\u653e\u8fb9\u7f18\u7f13\u5b58\uff0c\u52a8\u6001\u90e8\u5206\u91c7\u7528 API \u5f02\u6b65\u52a0\u8f7d\u5e76\u7f13\u5b58\u77ed\u65f6\u6709\u6548\u6570\u636e\u3002<\/li>\n<li>\u4f7f\u7528 ESI 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shield\u3001\u56de\u6e90\u538b\u7f29\u6216\u56de\u6e90\u9650\u6d41\u7b56\u7565\u3002<\/p>\n<h3>\u591a\u57df\u540d\u4e0e\u591a\u7ad9\u70b9\u7ba1\u7406<\/h3>\n<p>\u4f01\u4e1a\u5e38\u5e38\u540c\u65f6\u7ba1\u7406\u591a\u4e2a\u7ad9\u70b9\u6216\u56fd\u9645\u5316\u57df\u540d\uff08\u5305\u62ec\u57df\u540d\u6ce8\u518c\u3001DNS \u7b56\u7565\uff09\uff0c\u9009\u578b\u65f6\u8003\u8651\u662f\u5426\u53ef\u4ee5\u7edf\u4e00\u7ba1\u7406\u89c4\u5219\u4e0e\u8bc1\u4e66\uff0c\u4ee5\u7b80\u5316\u8fd0\u7ef4\u3002<\/p>\n<h2>\u5b9e\u6218\u5efa\u8bae\u4e0e\u4f18\u5316\u6e05\u5355<\/h2>\n<ul>\n<li>\u901a\u8fc7\u7070\u5ea6\u6d4b\u8bd5\u9010\u6b65\u63d0\u5347\u7f13\u5b58 TTL\uff0c\u89c2\u5bdf\u7f13\u5b58\u547d\u4e2d\u7387\u4e0e\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<li>\u9488\u5bf9\u9ad8\u6d41\u91cf\u4e8b\u4ef6\uff08\u4fc3\u9500\u3001\u53d1\u5e03\u4f1a\uff09\u63d0\u524d\u8fdb\u884c\u7f13\u5b58\u9884\u70ed\uff08warming\uff09\u4e0e origin shield 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