{"id":209989,"date":"2025-10-24T02:44:46","date_gmt":"2025-10-23T18:44:46","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209989\/"},"modified":"2025-10-24T02:44:47","modified_gmt":"2025-10-23T18:44:47","slug":"cdn-228","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209989\/","title":{"rendered":"CDN\u7f13\u5b58\u547d\u4e2d\u7387\u7edf\u8ba1\u65b9\u6cd5\u5168\u89e3\u6790\uff1a\u539f\u7406\u3001\u6307\u6807\u4e0e\u5b9e\u64cd"},"content":{"rendered":"<p>\u5728\u4f7f\u7528CDN\u52a0\u901f\u7f51\u7ad9\u548c\u5e94\u7528\u65f6\uff0c<strong>\u7f13\u5b58\u547d\u4e2d\u7387\uff08Cache Hit Ratio\uff09<\/strong>\u662f\u8861\u91cf\u6548\u679c\u6700\u91cd\u8981\u7684\u6307\u6807\u4e4b\u4e00\u3002\u5bf9\u4e8e\u5e0c\u671b\u964d\u4f4e\u5e26\u5bbd\u6210\u672c\u3001\u7f29\u77ed\u54cd\u5e94\u65f6\u5ef6\u5e76\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u7684\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u51c6\u786e\u7edf\u8ba1\u4e0e\u4f18\u5316\u7f13\u5b58\u547d\u4e2d\u7387\u65e2\u662f\u6280\u672f\u95ee\u9898\u4e5f\u662f\u8fd0\u8425\u95ee\u9898\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u5165\u624b\uff0c\u7cfb\u7edf\u8bb2\u89e3\u7f13\u5b58\u547d\u4e2d\u7387\u7684\u7edf\u8ba1\u65b9\u6cd5\u3001\u5e38\u89c1\u8bef\u533a\u3001\u5b9e\u8df5\u6280\u5de7\u4e0e\u9009\u8d2d\u5efa\u8bae\uff0c\u9002\u7528\u573a\u666f\u6db5\u76d6\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u7b49\u6d77\u5916\u90e8\u7f72\u4e0e\u591a\u8282\u70b9\u52a0\u901f\u3002<\/p>\n<h2>\u7f13\u5b58\u547d\u4e2d\u7387\u7684\u57fa\u672c\u6982\u5ff5\u4e0e\u5e38\u7528\u6307\u6807<\/h2>\n<p>\u7f13\u5b58\u547d\u4e2d\u7387\u901a\u5e38\u8868\u793a\u4e3a\u5728\u4e00\u5b9a\u65f6\u95f4\u7a97\u53e3\u5185\uff0cCDN\u5bf9\u8bf7\u6c42\u76f4\u63a5\u4ece\u8fb9\u7f18\u7f13\u5b58\u6210\u529f\u8fd4\u56de\u7684\u6bd4\u4f8b\u3002\u5e38\u89c1\u8ba1\u7b97\u53e3\u5f84\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u8bf7\u6c42\u547d\u4e2d\u7387\uff08Request Hit Ratio, RHR\uff09<\/strong>\uff1a\u547d\u4e2d\u8bf7\u6c42\u6570 \/ \u603b\u8bf7\u6c42\u6570\u3002\u4f8b\u5982\uff1a1000\u6b21\u8bf7\u6c42\u4e2d\u6709700\u6b21\u4ece\u7f13\u5b58\u8fd4\u56de\uff0cRHR=70%\u3002<\/li>\n<li><strong>\u5b57\u8282\u547d\u4e2d\u7387\uff08Byte Hit Ratio, BHR\uff09<\/strong>\uff1a\u547d\u4e2d\u5b57\u8282\u6570 \/ \u603b\u4f20\u8f93\u5b57\u8282\u6570\u3002\u5927\u6587\u4ef6\u6216\u89c6\u9891\u4f1a\u663e\u8457\u5f71\u54cdBHR\u3002<\/li>\n<li><strong>\u5bf9\u8c61\u547d\u4e2d\u7387<\/strong>\uff1a\u57fa\u4e8e\u4e0d\u540c\u8d44\u6e90\u5bf9\u8c61\uff08\u4f8b\u5982\u56fe\u7247\u3001JS\u3001HTML\uff09\u5206\u522b\u7edf\u8ba1\u547d\u4e2d\u7387\uff0c\u5e38\u7528\u4e8e\u7cbe\u7ec6\u5316\u4f18\u5316\u3002<\/li>\n<\/ul>\n<p>\u6b64\u5916\u8fd8\u4f1a\u7528\u5230\u5ef6\u8fdf\u76f8\u5173\u6307\u6807\uff0c\u5982\u9996\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09\u300195\/99\u767e\u5206\u4f4d\u54cd\u5e94\u65f6\u95f4\uff0c\u7528\u4e8e\u8bc4\u4f30\u7f13\u5b58\u547d\u4e2d\u5bf9\u4f53\u9a8c\u7684\u5b9e\u9645\u63d0\u5347\u3002<\/p>\n<h2>\u539f\u7406\u4e0e\u7edf\u8ba1\u53e3\u5f84\u8be6\u89e3<\/h2>\n<h3>\u7f13\u5b58\u903b\u8f91\u4e0e\u547d\u4e2d\u5224\u5b9a<\/h3>\n<p>CDN\u8fb9\u7f18\u8282\u70b9\u5728\u6536\u5230\u8bf7\u6c42\u65f6\uff0c\u4f1a\u5148\u6839\u636e<strong>\u7f13\u5b58Key\uff08\u901a\u5e38\u7531\u534f\u8bae\u3001\u57df\u540d\u3001\u8def\u5f84\u3001QueryString\u3001Headers\u7b49\u7ec4\u6210\uff09<\/strong>\u67e5\u627e\u672c\u5730\u7f13\u5b58\u6761\u76ee\uff1b\u82e5\u6761\u76ee\u5b58\u5728\u4e14\u672a\u5931\u6548\u5219\u89c6\u4e3a\u547d\u4e2d\uff08Hit\uff09\uff0c\u5426\u5219\u56de\u6e90\uff08Miss\uff09\u3002\u547d\u4e2d\u903b\u8f91\u8fd8\u4f1a\u53d7Cache-Control\u3001Expires\u3001Set-Cookie\u3001Vary\u7b49\u54cd\u5e94\u5934\u5f71\u54cd\u3002<\/p>\n<h3>\u5e38\u89c1\u7edf\u8ba1\u5b9e\u73b0\u65b9\u5f0f<\/h3>\n<ul>\n<li><strong>\u8fb9\u7f18\u65e5\u5fd7\u5206\u6790<\/strong>\uff1a\u89e3\u6790CDN\u8fb9\u7f18\u8282\u70b9\u7684\u8bbf\u95ee\u65e5\u5fd7\uff08\u4f8b\u5982edge_access\uff09\uff0c\u53ef\u4ee5\u6309\u8bf7\u6c42\/\u5b57\u8282\u5206\u522b\u8ba1\u6570\u3002\u4f18\u70b9\u662f\u771f\u5b9e\uff1b\u7f3a\u70b9\u662f\u65e5\u5fd7\u91cf\u5927\u3001\u5ef6\u8fdf\u9ad8\u3001\u9700\u8981\u5904\u7406\u91c7\u6837\u4e0e\u53bb\u91cd\u3002<\/li>\n<li><strong>CDN\u63d0\u4f9b\u7684\u5b9e\u65f6\u76d1\u63a7API<\/strong>\uff1a\u5927\u5382CDN\u901a\u5e38\u63d0\u4f9bRequestHit\u3001ByteHit\u7b49\u6307\u6807\u7684\u5b9e\u65f6\u8ba1\u6570\uff0c\u4fbf\u4e8e\u4e0ePrometheus\/Grafana\u63a5\u5165\u3002\u4f18\u70b9\u662f\u5b9e\u65f6\u4e14\u4f4e\u8fd0\u7ef4\u6210\u672c\uff1b\u9700\u6ce8\u610fAPI\u53e3\u5f84\u8bf4\u660e\u3002<\/li>\n<li><strong>\u5408\u6210\u6d4b\u8bd5\uff08Synthetic Checks\uff09<\/strong>\uff1a\u811a\u672c\u5411\u4e0d\u540c\u8282\u70b9\u53d1\u9001\u53ef\u63a7\u8bf7\u6c42\uff0c\u9a8c\u8bc1\u662f\u5426\u547d\u4e2d\uff0c\u9002\u5408\u6392\u67e5\u914d\u7f6e\u95ee\u9898\u4e0e\u9a8c\u8bc1\u7f13\u5b58\u952e\u7b56\u7565\uff0c\u4f46\u4e0d\u5177\u5907\u7edf\u8ba1\u4ee3\u8868\u6027\u3002<\/li>\n<li><strong>\u91c7\u6837\u4e0e\u4f30\u7b97<\/strong>\uff1a\u5728\u9ad8\u6d41\u91cf\u573a\u666f\u4e0b\u5bf9\u8bf7\u6c42\u8fdb\u884c\u91c7\u6837\u7edf\u8ba1\uff0c\u518d\u901a\u8fc7\u6743\u91cd\u4f30\u7b97\u603b\u4f53\u547d\u4e2d\u7387\uff0c\u51cf\u5c11\u8ba1\u7b97\u6210\u672c\uff0c\u4f46\u9700\u4fdd\u8bc1\u91c7\u6837\u5747\u5300\u6027\u3002<\/li>\n<\/ul>\n<h2>\u7edf\u8ba1\u516c\u5f0f\u3001\u793a\u4f8b\u4e0e\u7cbe\u7ec6\u5316\u5ea6\u91cf<\/h2>\n<p>\u5e38\u7528\u516c\u5f0f\uff1a<\/p>\n<ul>\n<li>Request Hit Ratio = Hits_requests \/ Total_requests \u00d7 100%<\/li>\n<li>Byte Hit Ratio = Hits_bytes \/ Total_bytes \u00d7 100%<\/li>\n<\/ul>\n<p>\u793a\u4f8b\uff1a24\u5c0f\u65f6\u5185\u8bf7\u6c42\u603b\u657010\u4e07\u6b21\uff0c\u603b\u5b57\u828210TB\uff1b\u547d\u4e2d\u8bf7\u6c42\u65707\u4e07\uff0c\u547d\u4e2d\u5b57\u8282\u65706.5TB\uff0c\u5219RHR=70%\uff0cBHR=65%\u3002<\/p>\n<p><strong>\u4e3a\u4ec0\u4e48RHR\u4e0eBHR\u4f1a\u4e0d\u4e00\u81f4\uff1f<\/strong>\u56e0\u4e3a\u5927\u6587\u4ef6\uff08\u89c6\u9891\u3001ISO\u7b49\uff09\u5360\u7528\u5927\u91cf\u5b57\u8282\u5373\u4f7f\u4e2a\u6570\u5c11\u4e5f\u4f1a\u62c9\u4f4e\u6216\u62ac\u9ad8BHR\uff0c\u56e0\u6b64\u4e8c\u8005\u9700\u5206\u5f00\u89c2\u5bdf\uff0c\u5c24\u5176\u5728\u90e8\u7f72\u5a92\u4f53\u5206\u53d1\u6216\u8f6f\u4ef6\u5206\u53d1\u65f6\u3002<\/p>\n<h2>\u5e38\u89c1\u8bef\u533a\u4e0e\u7edf\u8ba1\u9677\u9631<\/h2>\n<ul>\n<li>\u628a\u540e\u7aef\u8fd4\u56de\u7684304\uff08Not Modified\uff09\u89c6\u4e3aMiss\uff1a\u5176\u5b9e304\u7ecf\u5e38\u4f34\u968f\u534f\u5546\u7f13\u5b58\uff0cCDN\u53ef\u80fd\u4f1a\u8ba4\u4e3a\u4e3a\u547d\u4e2d\u6216\u534a\u547d\u4e2d\uff08revalidated hit\uff09\uff0c\u7edf\u8ba1\u53e3\u5f84\u9700\u660e\u786e\u3002<\/li>\n<li>\u5ffd\u89c6Range\u8bf7\u6c42\u7684\u5f71\u54cd\uff1a\u5206\u7247\u4e0b\u8f7d\u6216\u65ad\u70b9\u7eed\u4f20\u4f1a\u4ea7\u751f\u591a\u4e2a\u8bf7\u6c42\uff0c\u53ef\u80fd\u5bfc\u81f4Request\u547d\u4e2d\u7387\u504f\u4f4e\uff0c\u4f46\u5b9e\u9645\u6570\u636e\u4f20\u8f93\u53ef\u80fd\u591a\u6570\u6765\u81ea\u7f13\u5b58\u3002<\/li>\n<li>\u672a\u533a\u5206\u9759\u6001\u4e0e\u52a8\u6001\u5185\u5bb9\uff1aHTML\u901a\u5e38\u77edTTL\u6216\u4e0d\u7f13\u5b58\uff0c\u82e5\u628a\u6240\u6709\u8bf7\u6c42\u5408\u5e76\u7edf\u8ba1\u4f1a\u63a9\u76d6\u9759\u6001\u8d44\u6e90\u7684\u4f18\u79c0\u8868\u73b0\u3002<\/li>\n<\/ul>\n<h2>\u5b9e\u64cd\u6307\u5357\uff1a\u5982\u4f55\u51c6\u786e\u7edf\u8ba1\u5e76\u63d0\u5347\u547d\u4e2d\u7387<\/h2>\n<h3>\u4e00\u3001\u786e\u5b9a\u7edf\u8ba1\u53e3\u5f84\u5e76\u7edf\u4e00\u6570\u636e\u6e90<\/h3>\n<p>\u9996\u5148\u660e\u786e\u4f7f\u7528RHR\u8fd8\u662fBHR\u6216\u4e8c\u8005\u5e76\u884c\uff0c\u9009\u62e9\u7edf\u4e00\u6570\u636e\u6e90\uff08CDN\u76d1\u63a7API\u6216\u8fb9\u7f18\u8bbf\u95ee\u65e5\u5fd7\uff09\u3002\u5728\u8de8\u533a\u57df\u90e8\u7f72\uff08\u5982\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\u3001\u65e5\u672c\u670d\u52a1\u5668\uff09\u65f6\uff0c\u6309\u8282\u70b9\u6216\u6309\u533a\u57df\u5206\u8868\u7edf\u8ba1\uff0c\u4fbf\u4e8e\u5b9a\u4f4d\u533a\u57df\u6027\u95ee\u9898\uff08\u4f8b\u5982\u9999\u6e2f\u8282\u70b9\u5bf9\u9999\u6e2f\u670d\u52a1\u5668\u56de\u6e90\u65f6\u5ef6\u8f83\u4f4e\uff09\u3002<\/p>\n<h3>\u4e8c\u3001\u5b9e\u73b0\u7aef\u5230\u7aef\u6307\u6807\u91c7\u96c6<\/h3>\n<p>\u63a8\u8350\u5efa\u7acb\u5982\u4e0b\u6570\u636e\u6d41\u6c34\u7ebf\uff1a<\/p>\n<ul>\n<li>\u6536\u96c6\u8fb9\u7f18\u8bbf\u95ee\u65e5\u5fd7\u6216CDN\u76d1\u63a7API\uff08RequestHit, RequestMiss, BytesServed, BytesFromOrigin\uff09\u3002<\/li>\n<li>\u4f7f\u7528\u65f6\u95f4\u7a97\u53e3\uff081m\/5m\/1h\uff09\u805a\u5408\uff0c\u8ba1\u7b97RHR\/BHR\uff0c\u5e76\u5bfc\u5165Prometheus\u6216InfluxDB\uff0cGrafana\u53ef\u89c6\u5316\u3002<\/li>\n<li>\u6309\u8d44\u6e90\u7c7b\u578b\uff08CSS\/JS\/IMG\/HTML\/API\uff09\u548cCache-Control\u5206\u7ec4\u5206\u6790\u3002<\/li>\n<\/ul>\n<h3>\u4e09\u3001\u91cd\u70b9\u4f18\u5316\u624b\u6bb5\u4e0e\u5b9e\u8df5\u6848\u4f8b<\/h3>\n<ul>\n<li><strong>\u7edf\u4e00\u7f13\u5b58Key\u7b56\u7565<\/strong>\uff1a\u660e\u786eQueryString\u5904\u7406\uff08\u5ffd\u7565\u4e0d\u5f71\u54cd\u6e32\u67d3\u7684\u53c2\u6570\uff09\uff0c\u914d\u5408URL\u89c4\u8303\u5316\u548cCDN\u7684\u7f13\u5b58\u7b56\u7565\uff0c\u51cf\u5c11\u56e0Key\u4e0d\u4e00\u81f4\u5bfc\u81f4\u7684Miss\u3002<\/li>\n<li><strong>\u5408\u7406\u8bbe\u7f6e\u7f13\u5b58\u63a7\u5236<\/strong>\uff1a\u9759\u6001\u8d44\u6e90\u4f7f\u7528\u8f83\u957fTTL\uff0c\u52a8\u6001\u8d44\u6e90\u91c7\u7528Cache-Control: 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