{"id":210247,"date":"2025-10-24T09:05:06","date_gmt":"2025-10-24T01:05:06","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210247\/"},"modified":"2025-10-24T09:05:07","modified_gmt":"2025-10-24T01:05:07","slug":"cdn-335","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210247\/","title":{"rendered":"\u6570\u636e\u9a71\u52a8\u7684CDN\u81ea\u52a8\u5316\u8fd0\u7ef4\uff1a\u667a\u80fd\u76d1\u63a7\u4e0e\u7cbe\u51c6\u4f18\u5316"},"content":{"rendered":"<p>\u968f\u7740\u5168\u7403\u4e92\u8054\u7f51\u4e1a\u52a1\u7684\u5feb\u901f\u589e\u957f\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u5df2\u7ecf\u6210\u4e3a\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3001\u964d\u4f4e\u5e26\u5bbd\u6210\u672c\u548c\u63d0\u9ad8\u53ef\u7528\u6027\u7684\u5173\u952e\u57fa\u7840\u8bbe\u65bd\u3002\u7136\u800c\uff0c\u4f20\u7edf\u7684\u4eba\u5de5\u8fd0\u7ef4\u548c\u9759\u6001\u7b56\u7565\u96be\u4ee5\u5e94\u5bf9\u6d41\u91cf\u6ce2\u52a8\u3001\u7a81\u53d1\u653b\u51fb\u4e0e\u590d\u6742\u7684\u8de8\u5730\u57df\u8def\u7531\u9700\u6c42\u3002<strong>\u6570\u636e\u9a71\u52a8\u7684CDN\u81ea\u52a8\u5316\u8fd0\u7ef4<\/strong>\u5e94\u8fd0\u800c\u751f\uff0c\u901a\u8fc7\u5bf9\u5b9e\u65f6\u76d1\u63a7\u6570\u636e\u7684\u91c7\u96c6\u3001\u5206\u6790\u4e0e\u95ed\u73af\u6267\u884c\uff0c\u5b9e\u73b0\u667a\u80fd\u76d1\u63a7\u4e0e\u7cbe\u51c6\u4f18\u5316\uff0c\u663e\u8457\u63d0\u5347\u8fd0\u7ef4\u6548\u7387\u4e0e\u4e1a\u52a1\u53ef\u9760\u6027\u3002<\/p>\n<h2>\u539f\u7406\u4e0e\u6280\u672f\u67b6\u6784<\/h2>\n<p>\u6570\u636e\u9a71\u52a8\u7684\u81ea\u52a8\u5316\u8fd0\u7ef4\u7531\u6570\u636e\u5c42\u3001\u5904\u7406\u5c42\u3001\u51b3\u7b56\u5c42\u4e0e\u6267\u884c\u5c42\u7ec4\u6210\uff0c\u5404\u5c42\u7d27\u5bc6\u914d\u5408\u5f62\u6210\u95ed\u73af\u3002<\/p>\n<h3>\u6570\u636e\u91c7\u96c6\u5c42<\/h3>\n<ul>\n<li>\u8fb9\u7f18\u8282\u70b9\u4e0e\u56de\u6e90\u670d\u52a1\u5668\u7684\u6307\u6807\uff08RTT\u3001TTFB\u3001\u5e26\u5bbd\u3001\u5e76\u53d1\u8fde\u63a5\u6570\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u9519\u8bef\u7387\u7b49\uff09\u901a\u8fc7\u8f7b\u91cf\u7ea7\u4ee3\u7406\u91c7\u96c6\uff0c\u5e38\u7528\u5de5\u5177\u5305\u62ec 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WAF \u89c4\u5219\u4e0b\u53d1\u3002<\/li>\n<li>\u4e0e\u5bb9\u5668\u5316\u5e73\u53f0\uff08Kubernetes\uff09\u914d\u5408\uff0c\u5b9e\u73b0\u8fb9\u7f18\u670d\u52a1\u7684\u5f39\u6027\u6269\u5bb9\u4e0e\u7070\u5ea6\u53d1\u5e03\u3002<\/li>\n<\/ul>\n<h2>\u5173\u952e\u6280\u672f\u7ec6\u8282<\/h2>\n<p><strong>1. \u5b9e\u65f6\u63a2\u6d4b\u4e0e\u4e3b\u52a8\u76d1\u63a7<\/strong>\uff1a\u88ab\u52a8\u65e5\u5fd7\u53ea\u80fd\u53cd\u6620\u5df2\u53d1\u751f\u7684\u95ee\u9898\uff0c\u4e3b\u52a8\u63a2\u6d4b\uff08HTTP\/TCP\/ICMP\uff09\u80fd\u63d0\u524d\u53d1\u73b0\u82e5\u5e72\u8282\u70b9\u7684\u8fde\u901a\u6027\u6216\u56de\u6e90\u5ef6\u8fdf\u5f02\u5e38\u3002\u63a2\u6d4b\u9891\u7387\u9700\u5728\u6210\u672c\u4e0e\u8986\u76d6\u7387\u4e4b\u95f4\u6298\u8877\uff0c\u4e00\u822c\u4e3a 10\u201360 \u79d2\u7ea7\u3002<\/p>\n<p><strong>2. \u591a\u7ef4\u5ea6\u5f02\u5e38\u68c0\u6d4b\u4e0e\u5173\u8054\u5206\u6790<\/strong>\uff1a\u5355\u4e00\u6307\u6807\u544a\u8b66\u5f80\u5f80\u8bef\u62a5\u9ad8\u3002\u5e94\u91c7\u7528\u591a\u6307\u6807\u8054\u5408\uff08\u5982 RTT \u5347\u9ad8 + \u7f13\u5b58\u547d\u4e2d\u7387\u4e0b\u964d + 404 \u589e\u52a0\uff09\u5e76\u7ed3\u5408\u6d41\u91cf\u4e0a\u4e0b\u6587\u505a\u6839\u56e0\u5b9a\u4f4d\u3002\u5229\u7528\u65f6\u95f4\u5e8f\u5217\u76f8\u4f3c\u5ea6\u548c\u56e0\u679c\u63a8\u65ad\u53ef\u81ea\u52a8\u8bc6\u522b\u5f02\u5e38\u6e90\u3002<\/p>\n<p><strong>3. \u667a\u80fd\u6d41\u91cf\u8c03\u5ea6\u7b56\u7565<\/strong>\uff1a\u7ed3\u5408 Anycast\/BGP\u3001Geo-DNS\u3001\u5e94\u7528\u5c42\u6d41\u91cf\u5206\u914d\uff08\u901a\u8fc7\u8fb9\u7f18\u63a7\u5236\u9762\uff09\u7684\u6df7\u5408\u7b56\u7565\u3002\u9047\u5230\u533a\u57df\u94fe\u8def\u62e5\u585e\uff0c\u53ef\u6309\u9884\u8bbe\u6743\u91cd\u5c06\u6d41\u91cf\u5207\u6362\u5230\u90bb\u8fd1 POP \u6216\u56de\u6e90\u5230\u66f4\u9760\u8fd1\u7528\u6237\u7684\u6d77\u5916\u670d\u52a1\u5668\uff0c\u5982\u9009\u62e9\u9999\u6e2f\u670d\u52a1\u5668\u8282\u70b9\u4ee5\u4f18\u5316\u4e9a\u592a\u5ef6\u8fdf\u3002<\/p>\n<p><strong>4. \u7f13\u5b58\u4e0e\u56de\u6e90\u4f18\u5316<\/strong>\uff1a\u57fa\u4e8e\u5185\u5bb9\u70ed\u5ea6\u4e0e\u8bbf\u95ee\u6a21\u5f0f\u81ea\u52a8\u8c03\u6574\u7f13\u5b58 TTL\u3001\u5206\u7247\u7f13\u5b58\u4ee5\u53ca\u5206\u5c42\u7f13\u5b58\uff08edge\u2192regional\u2192origin\uff09\u3002\u4f7f\u7528 LFU\/LRU \u7684\u6df7\u5408\u6dd8\u6c70\u4e0e\u70ed\u70b9\u9884\u70ed\u673a\u5236\u80fd\u63d0\u5347\u7f13\u5b58\u547d\u4e2d\u540c\u65f6\u51cf\u5c11\u56de\u6e90\u8d1f\u8f7d\u3002<\/p>\n<p><strong>5. \u81ea\u52a8\u5316\u9632\u62a4\u4e0e\u5f39\u6027\u4f38\u7f29<\/strong>\uff1a\u5728\u63a2\u6d4b\u5230 DDoS 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\u8282\u70b9\uff09\uff0c\u5bf9\u5317\u7f8e\u7528\u6237\u5219\u4f7f\u7528\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u7f8e\u56fdVPS \u7684\u56de\u6e90\u6c60\u3002<\/p>\n<h3>\u52a8\u6001\u5185\u5bb9\u4e0e API \u52a0\u901f<\/h3>\n<p>\u52a8\u6001\u5185\u5bb9\u4f9d\u8d56\u4e8e\u56de\u6e90\u6027\u80fd\u3002\u901a\u8fc7\u667a\u80fd\u8def\u7531\u548c\u4f1a\u8bdd\u7c98\u6027\u7b56\u7565\uff0c\u628a\u7528\u6237\u8bf7\u6c42\u8def\u7531\u5230\u5ef6\u8fdf\u6700\u4f4e\u4e14\u5065\u5eb7\u7684\u540e\u7aef\u96c6\u7fa4\u3002\u5fc5\u8981\u65f6\u53ef\u4f7f\u7528\u8fb9\u7f18\u8ba1\u7b97\u505a\u90e8\u5206\u52a8\u6001\u6e32\u67d3\uff0c\u51cf\u5c11\u8de8\u6d0b\u5f80\u8fd4\u3002<\/p>\n<h3>\u8de8\u5883\u4e1a\u52a1\u4e0e\u5408\u89c4\u573a\u666f<\/h3>\n<p>\u5728\u5408\u89c4\u6216\u5730\u57df\u9694\u79bb\u8981\u6c42\u4e0b\uff0c\u53ef\u5c06\u90e8\u5206\u6d41\u91cf\u6216\u5b58\u50a8\u9650\u5b9a\u5728\u7279\u5b9a\u56fd\u5bb6\uff08\u5982\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65e5\u672c\u670d\u52a1\u5668\uff09\u6216\u9009\u7528\u9999\u6e2f\u670d\u52a1\u5668 \u4f5c\u4e3a\u4e2d\u8f6c\u8282\u70b9\uff0c\u5b9e\u73b0\u5408\u6cd5\u5408\u89c4\u7684\u540c\u65f6\u4fdd\u8bc1\u4f53\u9a8c\u3002<\/p>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u624b\u5de5\u8fd0\u7ef4 vs \u6570\u636e\u9a71\u52a8\u81ea\u52a8\u5316<\/h2>\n<ul>\n<li><strong>\u54cd\u5e94\u901f\u5ea6<\/strong>\uff1a\u81ea\u52a8\u5316\u53ef\u5728\u79d2\u7ea7\u505a\u6d41\u91cf\u5207\u6362\u4e0e\u9650\u6d41\uff0c\u4eba\u5de5\u4ecb\u5165\u901a\u5e38\u9700\u8981\u5206\u949f\u5230\u5c0f\u65f6\u3002<\/li>\n<li><strong>\u51c6\u786e\u6027<\/strong>\uff1a\u6570\u636e\u9a71\u52a8\u7ed3\u5408\u6a21\u578b\u80fd\u964d\u4f4e\u8bef\u5224\u7387\u5e76\u8fdb\u884c\u6839\u56e0\u5b9a\u4f4d\uff1b\u4eba\u5de5\u57fa\u4e8e\u7ecf\u9a8c\u96be\u4ee5\u8986\u76d6\u590d\u6742\u5173\u8054\u3002<\/li>\n<li><strong>\u6210\u672c\u6548\u7387<\/strong>\uff1a\u667a\u80fd\u8c03\u5ea6\u5728\u4fdd\u8bc1 SLA 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