{"id":209887,"date":"2025-10-24T00:47:19","date_gmt":"2025-10-23T16:47:19","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209887\/"},"modified":"2025-10-24T00:47:20","modified_gmt":"2025-10-23T16:47:20","slug":"cdn-177","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209887\/","title":{"rendered":"CDN\u9009\u578b\u524d\u5fc5\u505a\u7684\u9700\u6c42\u5206\u6790\uff1a\u786e\u4fdd\u6027\u80fd\u3001\u53ef\u9760\u4e0e\u6210\u672c\u6700\u4f18"},"content":{"rendered":"<p>\u5728\u4e3a\u7f51\u7ad9\u6216\u5e94\u7528\u9009\u62e9\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u4e4b\u524d\uff0c\u8fdb\u884c\u8be6\u5c3d\u7684\u9700\u6c42\u5206\u6790\u662f\u4fdd\u8bc1\u6027\u80fd\u3001\u53ef\u9760\u6027\u4e0e\u6210\u672c\u6548\u76ca\u7684\u5173\u952e\u6b65\u9aa4\u3002\u5bf9\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u7406\u89e3CDN\u7684\u5de5\u4f5c\u539f\u7406\u3001\u9002\u7528\u573a\u666f\u3001\u6027\u80fd\u6307\u6807\u53ca\u8ba1\u8d39\u6a21\u578b\uff0c\u80fd\u591f\u5728\u591a\u4e2a\u5730\u533a\uff08\u4f8b\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\u548c\u4e0d\u540c\u90e8\u7f72\u7c7b\u578b\uff08\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\u3001\u6d77\u5916\u670d\u52a1\u5668\uff09\u4e4b\u95f4\u505a\u51fa\u6743\u8861\uff0c\u4ece\u800c\u5b9e\u73b0\u6700\u4f18\u7684\u7528\u6237\u4f53\u9a8c\u548c\u8fd0\u8425\u6210\u672c\u3002<\/p>\n<h2>CDN 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Presence\uff09\uff0c\u4ee5\u51cf\u5c11\u56de\u6e90\u5ef6\u8fdf\u548c\u7f13\u89e3\u6e90\u7ad9\u538b\u529b\u3002\u5176\u5173\u952e\u7ec4\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u8fb9\u7f18\u8282\u70b9\uff08Edge\/PoP\uff09<\/strong>\uff1a\u8d1f\u8d23\u5411\u7ec8\u7aef\u7528\u6237\u63d0\u4f9b\u7f13\u5b58\u5185\u5bb9\uff0c\u8282\u70b9\u5206\u5e03\u51b3\u5b9a\u4e86\u5168\u7403\u8986\u76d6\u548c\u533a\u57df\u6027\u80fd\uff0c\u9009\u62e9\u65f6\u8981\u6ce8\u610f\u8282\u70b9\u5728\u9999\u6e2f\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u53ca\u7f8e\u6d32\u7684\u5e03\u70b9\u60c5\u51b5\u3002<\/li>\n<li><strong>\u56de\u6e90\uff08Origin\uff09\u914d\u7f6e<\/strong>\uff1a\u6e90\u7ad9\u53ef\u4ee5\u662f\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u6d77\u5916\u670d\u52a1\u5668\uff0c\u5fc5\u987b\u914d\u7f6e\u5408\u7406\u7684\u7f13\u5b58\u5934\uff08Cache-Control\u3001Expires\uff09\u3001\u56de\u6e90\u8ba4\u8bc1\u4e0e\u56de\u6e90\u9650\u901f\u7b56\u7565\u3002<\/li>\n<li><strong>Anycast \u4e0e\u8def\u7531\u7b56\u7565<\/strong>\uff1aAnycast \u52a9\u529b\u5c06\u7528\u6237\u8bf7\u6c42\u8def\u7531\u5230\u6700\u8fd1\u7684\u53ef\u7528\u8282\u70b9\uff0c\u800c\u57fa\u4e8e\u5730\u7406\u4f4d\u7f6e\u7684\u8def\u7531\u548c\u57fa\u4e8e\u6027\u80fd\uff08latency\u3001packet loss\uff09\u7684\u8def\u7531\u5219\u80fd\u8fdb\u4e00\u6b65\u4f18\u5316\u8bbf\u95ee\u4f53\u9a8c\u3002<\/li>\n<li><strong>\u5b89\u5168\u6a21\u5757<\/strong>\uff1aWAF\u3001DDoS \u9632\u62a4\u3001\u901f\u7387\u9650\u5236\u3001IP \u8bbf\u95ee\u7b56\u7565\u548c token \u7b7e\u540d\u6216 URL \u8fc7\u671f\u673a\u5236\uff0c\u7528\u4e8e\u4fdd\u62a4\u6e90\u7ad9\u4e0e\u8fb9\u7f18\u8282\u70b9\u3002<\/li>\n<li><strong>\u4f20\u8f93\u534f\u8bae\u652f\u6301<\/strong>\uff1aHTTP\/2\u3001HTTP\/3\uff08QUIC\uff09\u548c TLS \u7684\u652f\u6301\u4f1a\u663e\u8457\u5f71\u54cd\u5c0f\u8d44\u6e90\u3001\u591a\u5e76\u53d1\u8fde\u63a5\u573a\u666f\u4e0b\u7684\u6027\u80fd\u8868\u73b0\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5dee\u5f02\u5316\u9700\u6c42<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u573a\u666f\u5bf9 CDN \u7684\u8981\u6c42\u5dee\u522b\u5f88\u5927\uff0c\u4e0b\u9762\u5217\u51fa\u5e38\u89c1\u573a\u666f\u5e76\u8bf4\u660e\u8981\u5173\u6ce8\u7684\u6280\u672f\u70b9\uff1a<\/p>\n<h3>\u9759\u6001\u7f51\u7ad9\u4e0e\u5a92\u4f53\u5206\u53d1\uff08\u56fe\u7247\/\u89c6\u9891\uff09<\/h3>\n<ul>\n<li>\u5173\u6ce8\u70b9\uff1a\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u5206\u7247\u4e0b\u8f7d\uff08range requests\uff09\u3001\u5e26\u5bbd\u5cf0\u503c\u5904\u7406\u3001\u89c6\u9891\u5206\u6bb5\uff08HLS\/DASH\uff09\u652f\u6301\u3002<\/li>\n<li>\u6280\u672f\u8981\u6c42\uff1a\u652f\u6301 Brotli\/Gzip \u538b\u7f29\u3001\u81ea\u52a8\u56fe\u7247 WebP \u8f6c\u6362\u3001\u89c6\u9891\u8fb9\u7f18\u7f13\u5b58\u4e0e\u56de\u6e90\u9650\u901f\uff0c\u4ee5\u53ca\u6e05\u6670\u7684\u7f13\u5b58\u63a7\u5236\u7b56\u7565\uff08Cache-Control\u3001ETag\uff09\u3002<\/li>\n<\/ul>\n<h3>\u52a8\u6001\u9875\u9762\u4e0e API \u52a0\u901f<\/h3>\n<ul>\n<li>\u5173\u6ce8\u70b9\uff1a\u7f13\u5b58\u5fae\u7b56\u7565\uff08Stale-while-revalidate\u3001Stale-if-error\uff09\u3001\u8fb9\u7f18\u8ba1\u7b97\uff08Edge Compute\/Function\uff09\u4ee5\u51cf\u5c11\u56de\u6e90\u9891\u7387\u3002<\/li>\n<li>\u6280\u672f\u8981\u6c42\uff1a\u652f\u6301\u81ea\u5b9a\u4e49\u8fb9\u7f18\u811a\u672c\u3001\u7ec6\u7c92\u5ea6\u8def\u7531\u4e0e\u8bf7\u6c42\u91cd\u5199\u3001TLS \u5feb\u901f\u63e1\u624b\u4e0e\u8fde\u63a5\u590d\u7528\u3002<\/li>\n<\/ul>\n<h3>\u5168\u7403\u591a\u533a\u57df\u4e1a\u52a1\uff08\u8de8\u5883\u8bbf\u95ee\uff09<\/h3>\n<ul>\n<li>\u5173\u6ce8\u70b9\uff1a\u4e0d\u540c\u533a\u57df\u7684\u6cd5\u5f8b\u5408\u89c4\u3001\u6570\u636e\u9a7b\u7559\u3001\u5e76\u53d1\u8fde\u63a5\u5efa\u7acb\u65f6\u95f4\u3001\u4e0d\u540c\u5730\u533a\u7684\u5e26\u5bbd\u6210\u672c\u5dee\u5f02\u3002<\/li>\n<li>\u6280\u672f\u8981\u6c42\uff1a\u8282\u70b9\u8986\u76d6\u9762\uff08\u5c24\u5176\u662f\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u9996\u5c14\u3001\u65b0\u52a0\u5761\u53ca\u7f8e\u56fd\u4e3b\u8981\u57ce\u5e02\uff09\u3001\u5168\u7403\u8d1f\u8f7d\u5747\u8861\uff08GSLB\uff09\u548c\u5065\u5eb7\u68c0\u67e5\u673a\u5236\u3002<\/li>\n<\/ul>\n<h2>\u6027\u80fd\u4e0e\u53ef\u9760\u6027\u8bc4\u4f30\u8981\u70b9<\/h2>\n<p>\u5728\u9009\u578b\u65f6\u5e94\u901a\u8fc7\u91cf\u5316\u6307\u6807\u6765\u8bc4\u4f30\u5019\u9009 CDN\uff1a<\/p>\n<ul>\n<li><strong>\u5ef6\u8fdf\uff08Latency\uff09<\/strong>\uff1a\u4ece\u76ee\u6807\u7528\u6237\u7fa4\u5230\u6700\u8fd1 PoP \u7684 RTT\uff1b\u5bf9\u9999\u6e2f\u53ca\u4e1c\u5357\u4e9a\u7528\u6237\u8981\u7279\u522b\u5173\u6ce8\u9999\u6e2f\u8282\u70b9\u4e0e\u65b0\u52a0\u5761\u8282\u70b9\u7684\u8868\u73b0\u3002<\/li>\n<li><strong>\u7f13\u5b58\u547d\u4e2d\u7387\uff08Hit Ratio\uff09<\/strong>\uff1a\u9ad8\u547d\u4e2d\u7387\u80fd\u663e\u8457\u964d\u4f4e\u56de\u6e90\u5e26\u5bbd\u4e0e\u5ef6\u8fdf\uff0c\u9700\u6d4b\u8bd5\u4e0d\u540c\u6587\u4ef6\u7c7b\u578b\u4e0e\u7f13\u5b58\u7b56\u7565\u4e0b\u7684\u547d\u4e2d\u7387\u3002<\/li>\n<li><strong>\u541e\u5410\u91cf\u4e0e\u5e76\u53d1\u8fde\u63a5\u6570<\/strong>\uff1a\u5728\u6d41\u91cf\u9ad8\u5cf0\u65f6\u6bb5\u5bf9\u8fb9\u7f18\u8282\u70b9\u7684\u627f\u8f7d\u80fd\u529b\u3002<\/li>\n<li><strong>\u53ef\u7528\u6027\u4e0e SLA<\/strong>\uff1a\u5305\u62ec\u670d\u52a1\u53ef\u7528\u7387\u3001\u56de\u6e90\u53ef\u6062\u590d\u65f6\u95f4\u4ee5\u53ca\u533a\u57df\u6027\u6545\u969c\u65f6\u7684\u6d41\u91cf\u5207\u6362\u80fd\u529b\u3002<\/li>\n<li><strong>\u9519\u8bef\u7387\u4e0e\u964d\u7ea7\u7b56\u7565<\/strong>\uff1a404\/5xx \u6bd4\u7387\uff0c\u8fb9\u7f18\u7f13\u5b58\u964d\u7ea7\uff08serve stale\uff09\u548c\u9759\u6001\u5907\u4efd\u7b56\u7565\u3002<\/li>\n<\/ul>\n<h2>\u5b89\u5168\u3001\u5408\u89c4\u4e0e\u8fd0\u7ef4\u9700\u6c42<\/h2>\n<p>\u5b89\u5168\u6027\u4e0e\u5408\u89c4\u6027\u4e0d\u5bb9\u5ffd\u89c6\uff0c\u7279\u522b\u662f\u4f01\u4e1a\u7ea7\u5e94\u7528\uff1a<\/p>\n<ul>\n<li>WAF \u4e0e DDoS\uff1a\u786e\u8ba4 CDN \u662f\u5426\u63d0\u4f9b\u5185\u7f6e WAF \u89c4\u5219\u96c6\u548c\u5b9e\u65f6 DDoS \u7f13\u89e3\u80fd\u529b\uff0c\u80fd\u5426\u9488\u5bf9\u6e90\u7ad9\u4e0e\u8fb9\u7f18\u8fdb\u884c\u901f\u7387\u9650\u5236\u3002<\/li>\n<li>TLS \u7ba1\u7406\uff1a\u8bc1\u4e66\u81ea\u52a8\u7b7e\u53d1\uff08ACME\uff09\u3001\u81ea\u5b9a\u4e49\u8bc1\u4e66\u652f\u6301\u3001TLS \u7248\u672c\u7b56\u7565\u53ca\u5411\u540e\u517c\u5bb9\u3002<\/li>\n<li>\u5ba1\u8ba1\u4e0e\u65e5\u5fd7\uff1a\u8bbf\u95ee\u65e5\u5fd7\uff08\u8fb9\u7f18\u65e5\u5fd7\u4e0e\u56de\u6e90\u65e5\u5fd7\uff09\u3001\u5b9e\u65f6\u5206\u6790\u4e0e\u957f\u65f6\u5f52\u6863\u80fd\u529b\uff0c\u7528\u4ee5\u652f\u6301\u5b89\u5168\u5ba1\u8ba1\u4e0e\u6d41\u91cf\u8ba1\u8d39\u7684\u6838\u5bf9\u3002<\/li>\n<li>\u6570\u636e\u5408\u89c4\uff1a\u9488\u5bf9\u7279\u5b9a\u5730\u533a\uff08\u4f8b\u5982\u9999\u6e2f\u6216\u65e5\u672c\uff09\u662f\u5426\u6709\u6570\u636e\u9a7b\u7559\u8981\u6c42\uff0c\u662f\u5426\u652f\u6301\u672c\u5730\u5316\u65e5\u5fd7\u5b58\u50a8\u3002<\/li>\n<\/ul>\n<h2>\u6210\u672c\u6a21\u578b\u4e0e\u8ba1\u8d39\u9677\u9631<\/h2>\n<p>CDN \u8ba1\u8d39\u65b9\u5f0f\u591a\u6837\uff0c\u4e86\u89e3\u8ba1\u8d39\u7ec6\u9879\u6709\u52a9\u4e8e\u907f\u514d\u9ad8\u989d\u8d26\u5355\uff1a<\/p>\n<ul>\n<li>\u5e26\u5bbd\u8d39\u7528\uff1a\u901a\u5e38\u6309\u51fa\u7ad9\u6d41\u91cf\u8ba1\u8d39\uff0c\u6309\u533a\u57df\u5206\u6bb5\u5b9a\u4ef7\uff08\u4f8b\u5982\u4ece\u9999\u6e2f\u8282\u70b9\u5230\u4e2d\u56fd\u5185\u5730\u3001\u5230\u7f8e\u56fd\u6216\u5230\u65e5\u672c\u7684\u5e26\u5bbd\u4ef7\u683c\u5dee\u5f02\uff09\u3002<\/li>\n<li>\u8bf7\u6c42\u8d39\u7528\uff1a\u6bcf\u4e07\u6b21\u8bf7\u6c42\u6216\u6bcf\u767e\u4e07\u6b21\u8bf7\u6c42\u8ba1\u8d39\uff0cAPI \u548c\u5c0f\u6587\u4ef6\u5927\u91cf\u8bf7\u6c42\u573a\u666f\u4e0b\u8fd9\u90e8\u5206\u53ef\u80fd\u5360\u6bd4\u663e\u8457\u3002<\/li>\n<li>\u7f13\u5b58\/\u56de\u6e90\u6d41\u91cf\uff1a\u56de\u6e90\u5e26\u5bbd\u4e0e\u56de\u6e90\u8bf7\u6c42\u8d39\u7528\uff0c\u6709\u4e9b\u5382\u5546\u5bf9\u56de\u6e90\u6d41\u91cf\u6709\u989d\u5916\u8ba1\u8d39\u3002<\/li>\n<li>\u529f\u80fd\u9644\u52a0\u8d39\uff1aWAF\u3001\u5b9e\u65f6\u65e5\u5fd7\u3001\u8fb9\u7f18\u8ba1\u7b97\u3001TLS \u8bc1\u4e66\u7ba1\u7406\u7b49\u53ef\u80fd\u5355\u72ec\u8ba1\u8d39\u3002<\/li>\n<\/ul>\n<p><strong>\u5efa\u8bae\u505a\u6cd5\uff1a<\/strong>\u5148\u57fa\u4e8e\u5386\u53f2\u6d41\u91cf\u505a\u6d41\u91cf\u5256\u6790\uff08\u6309\u533a\u57df\u3001\u6309\u6587\u4ef6\u7c7b\u578b\u3001\u6309\u5cf0\u503c\uff09\uff0c\u6a21\u62df\u4e09\u4e2a\u6708\u7684\u6210\u672c\u6a21\u578b\uff0c\u518d\u4e0e\u4f9b\u5e94\u5546\u8ba1\u4ef7\u7b56\u7565\u5339\u914d\u3002<\/p>\n<h2>\u9009\u8d2d\u5efa\u8bae\u4e0e\u5b9e\u8df5\u6b65\u9aa4<\/h2>\n<p>\u4e0b\u9762\u7ed9\u51fa\u4e00\u5957\u7cfb\u7edf\u6027\u7684\u9009\u578b\u6d41\u7a0b\uff0c\u5e2e\u52a9\u4f60\u5728\u4f17\u591a CDN \u4f9b\u5e94\u5546\u4e2d\u505a\u51fa\u5e73\u8861\u7684\u51b3\u7b56\uff1a<\/p>\n<h3>1. \u660e\u786e\u4e1a\u52a1\u6307\u6807\u4e0e\u6d41\u91cf\u5206\u5e03<\/h3>\n<ul>\n<li>\u5b9a\u4e49\u5173\u952eKPI\uff1aP95 \u54cd\u5e94\u65f6\u95f4\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u53ef\u7528\u6027\u76ee\u6807\u3002<\/li>\n<li>\u5206\u6790\u6d41\u91cf\u70ed\u70b9\uff1a\u6765\u81ea\u9999\u6e2f\/\u65e5\u672c\/\u97e9\u56fd\/\u65b0\u52a0\u5761\/\u7f8e\u56fd\u7684\u6d41\u91cf\u5360\u6bd4\uff0c\u9759\u6001\u4e0e\u52a8\u6001\u6d41\u91cf\u6bd4\u4f8b\u3002<\/li>\n<\/ul>\n<h3>2. 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