{"id":209831,"date":"2025-10-24T00:00:14","date_gmt":"2025-10-23T16:00:14","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209831\/"},"modified":"2025-10-24T00:00:15","modified_gmt":"2025-10-23T16:00:15","slug":"cdn-sla","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209831\/","title":{"rendered":"\u4e00\u6587\u770b\u61c2CDN\u670d\u52a1\u5546\u5408\u540c\u4e0eSLA\uff1a\u6838\u5fc3\u6761\u6b3e\u3001\u53ef\u7528\u6027\u4e0e\u8d54\u4ed8\u8981\u70b9"},"content":{"rendered":"<p>\u5728\u4e3a\u7f51\u7ad9\u6216\u5e94\u7528\u9009\u7528CDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u65f6\uff0c\u9664\u4e86\u5173\u6ce8\u8282\u70b9\u8986\u76d6\u4e0e\u4ef7\u683c\uff0c\u5408\u540c\u4e0e\u670d\u52a1\u7b49\u7ea7\u534f\u8bae\uff08SLA\uff09\u4e2d\u7684\u7ec6\u8282\u5f80\u5f80\u51b3\u5b9a\u4e86\u5b9e\u9645\u8fd0\u8425\u7684\u7a33\u5b9a\u6027\u4e0e\u98ce\u9669\u66b4\u9732\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u7ed3\u5408\u6280\u672f\u5b9e\u73b0\u4e0e\u6cd5\u5f8b\u6761\u6b3e\uff0c\u9010\u9879\u89e3\u6790CDN\u5408\u540c\u4e0eSLA\u7684\u6838\u5fc3\u6761\u6b3e\u3001\u53ef\u7528\u6027\u8861\u91cf\u4e0e\u8d54\u4ed8\u8981\u70b9\uff0c\u5e2e\u52a9\u4f60\u5728\u91c7\u8d2d\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u9999\u6e2fVPS\u6216\u5176\u4ed6\u6d77\u5916\u670d\u52a1\u5668\u914d\u5957CDN\u65f6\u505a\u51fa\u66f4\u7a33\u59a5\u7684\u51b3\u7b56\u3002<\/p>\n<h2>\u5f15\u8a00\uff1a\u4e3a\u4ec0\u4e48\u8981\u8ba4\u771f\u770bCDN\u5408\u540c\u4e0eSLA<\/h2>\n<p>CDN\u4e0d\u4ec5\u4ec5\u662f\u52a0\u901f\u8282\u70b9\u7684\u96c6\u5408\uff0c\u5b83\u6d89\u53ca\u5230\u6d41\u91cf\u8c03\u5ea6\u3001\u7f13\u5b58\u7b56\u7565\u3001\u6e90\u7ad9\u4fdd\u62a4\u3001TLS\u8bc1\u4e66\u7ba1\u7406\u3001\u65e5\u5fd7\u4e0e\u62a5\u8868\u3001DDoS\u9632\u62a4\u3001\u4ee5\u53ca\u5408\u89c4\u4e0e\u6570\u636e\u4e3b\u6743\u95ee\u9898\u3002SLA\u5b9a\u4e49\u4e86\u4f9b\u5e94\u5546\u5728\u53ef\u7528\u6027\u3001\u65f6\u5ef6\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u54cd\u5e94\u65f6\u95f4\u7b49\u5173\u952e\u6307\u6807\u4e0a\u7684\u627f\u8bfa\uff0c\u5408\u540c\u5219\u89c4\u5b9a\u4e86\u8ba1\u8d39\u3001\u8d23\u4efb\u4e0a\u9650\u3001\u7ec8\u6b62\u6761\u4ef6\u4e0e\u8d54\u4ed8\u65b9\u5f0f\u3002\u5ffd\u89c6\u8fd9\u4e9b\u6761\u6b3e\uff0c\u53ef\u80fd\u5728\u53d1\u751f\u6545\u969c\u65f6\u53d1\u73b0\u5e76\u6ca1\u6709\u9884\u671f\u7684\u4fdd\u969c\u3002<\/p>\n<h2>CDN\u670d\u52a1\u7684\u57fa\u672c\u539f\u7406\u4e0e\u76f8\u5173\u6307\u6807<\/h2>\n<p>\u7406\u89e3SLA\u524d\uff0c\u9700\u8981\u638c\u63e1CDN\u7684\u5173\u952e\u5de5\u4f5c\u539f\u7406\u4e0e\u5e38\u89c1\u6307\u6807\uff1a<\/p>\n<ul>\n<li><strong>\u8fb9\u7f18\u8282\u70b9\uff08PoP\uff09\u5206\u5e03\uff1a<\/strong>\u8282\u70b9\u5730\u7406\u5206\u5e03\u51b3\u5b9a\u7528\u6237\u7684\u7f51\u7edc\u8df3\u6570\u4e0e\u94fe\u8def\u8d28\u91cf\u3002\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u9996\u5c14\u3001\u65b0\u52a0\u5761\u7b49\u4e9a\u6d32PoP\u5bf9\u4e2d\u56fd\u6e2f\u6fb3\u53ca\u4e1c\u4e9a\u8bbf\u95ee\u5c24\u4e3a\u91cd\u8981\uff0c\u5317\u7f8e\u7528\u6237\u5219\u5e38\u7528\u7f8e\u56fdPoP\u3002<\/li>\n<li><strong>\u7f13\u5b58\u547d\u4e2d\u7387\uff08Cache Hit Ratio\uff09\uff1a<\/strong>\u7f13\u5b58\u547d\u4e2d\u7387\u76f4\u63a5\u5f71\u54cd\u6e90\u7ad9\u6d41\u91cf\u548c\u54cd\u5e94\u65f6\u5ef6\u3002\u9ad8\u547d\u4e2d\u7387\u964d\u4f4e\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u7684\u5e26\u5bbd\u6210\u672c\u4e0e\u6e90\u7ad9\u8d1f\u8f7d\u3002<\/li>\n<li><strong>\u54cd\u5e94\u65f6\u5ef6\u4e0eP50\/P95\/P99\u5ef6\u8fdf\uff1a<\/strong>SLA\u6709\u65f6\u4f1a\u7528\u767e\u5206\u4f4d\u5ef6\u8fdf\u6765\u63cf\u8ff0\u6027\u80fd\u4fdd\u8bc1\uff0cP95\u6216P99\u66f4\u80fd\u53cd\u6620\u5c3e\u90e8\u5ef6\u8fdf\u4f53\u9a8c\u3002<\/li>\n<li><strong>\u53ef\u7528\u6027\uff08Availability\/Uptime\uff09\uff1a<\/strong>\u901a\u5e38\u4ee5\u65f6\u95f4\u767e\u5206\u6bd4\u8868\u793a\uff0c\u4f8b\u5982 99.9%\uff08\u6708\u5ea6\u4e0d\u53ef\u7528\u65f6\u95f4\u7ea643.2\u5206\u949f\uff09\u3002<\/li>\n<li><strong>\u6545\u969c\u6062\u590d\u65f6\u95f4\uff08MTTR\uff09\uff1a<\/strong>\u4f9b\u5e94\u5546\u627f\u8bfa\u7684\u5e73\u5747\u4fee\u590d\u65f6\u95f4\u6216\u6062\u590d\u65f6\u95f4\u76ee\u6807\uff08RTO\uff09\u3002<\/li>\n<li><strong>\u9519\u8bef\u7387\u4e0e\u541e\u5410\uff1a<\/strong>HTTP\u9519\u8bef\u7387\u3001\u5e26\u5bbd\u4e0a\u9650\u3001\u5e76\u53d1\u8fde\u63a5\u6570\u7b49\u9650\u5236\u4f1a\u88ab\u5199\u5165\u5408\u540c\u3002<\/li>\n<\/ul>\n<h2>\u5408\u540c\u4e0eSLA\u7684\u6838\u5fc3\u6761\u6b3e\u8be6\u89e3<\/h2>\n<h3>1. 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\u53ef\u7528\u6027\u4e0e\u6d4b\u91cf\u65b9\u6cd5<\/h3>\n<p>\u53ef\u7528\u6027\u6761\u6b3e\u5fc5\u987b\u660e\u786e\u6d4b\u91cf\u53e3\u5f84\uff1a<\/p>\n<ul>\n<li><strong>\u6d4b\u91cf\u6765\u6e90\uff1a<\/strong>\u662f\u7531\u4f9b\u5e94\u5546\u5185\u90e8\u76d1\u6d4b\u70b9\u6d4b\u91cf\uff0c\u8fd8\u662f\u7b2c\u4e09\u65b9\u76d1\u6d4b\uff08\u5982RUM\u3001\u7b2c\u4e09\u65b9\u63a2\u9488\uff09\uff1f\u7b2c\u4e09\u65b9\u6216\u5ba2\u6237\u4fa7\u63a2\u6d4b\u66f4\u80fd\u53cd\u6620\u771f\u5b9e\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<li><strong>\u65f6\u95f4\u7a97\u53e3\uff1a<\/strong>\u662f\u6309\u6708\u8ba1\u7b97\u3001\u6309\u8d26\u5355\u5468\u671f\u8fd8\u662f\u6309\u4e8b\u4ef6\uff1f<\/li>\n<li><strong>\u8861\u91cf\u76ee\u6807\uff1a<\/strong>\u53ef\u7528\u6027\u901a\u5e38\u5b9a\u4e49\u4e3a\u201c\u8fb9\u7f18\u8282\u70b9\u5bf9\u7279\u5b9a\u533a\u57df\u7684\u6210\u529f\u54cd\u5e94\u7387\u201d\u3002\u6ce8\u610f\u662f\u5426\u6392\u9664\u4e86DNS\u89e3\u6790\u5931\u8d25\u3001\u6e90\u7ad9\u4e0d\u53ef\u8fbe\u6216\u7528\u6237\u4fa7\u7f51\u7edc\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h3>3. \u8d54\u4ed8\u673a\u5236\u4e0e\u8ba1\u7b97\u65b9\u5f0f<\/h3>\n<p>\u8d54\u4ed8\u6761\u6b3e\u5f80\u5f80\u662f\u6700\u4e89\u8bae\u7684\u90e8\u5206\uff0c\u5e38\u89c1\u5f62\u5f0f\u5305\u62ec\u8d26\u5355\u62b5\u6263\u6216\u670d\u52a1\u65f6\u95f4\u5ef6\u957f\uff1a<\/p>\n<ul>\n<li>\u8d54\u4ed8\u901a\u5e38\u6309\u6708\u5ea6\u53ef\u7528\u6027\u533a\u95f4\u5206\u7ea7\uff0c\u4f8b\u5982 99.9%-100% \u65e0\u8d54\u4ed8\uff0c99.0%-99.9% \u8d54\u4ed810% \u6708\u8d39\uff0c\u4f4e\u4e8e99.0% \u8d54\u4ed830% \u7b49\u3002<\/li>\n<li>\u91cd\u8981\u7684\u662f\u786e\u8ba4\u8d54\u4ed8\u4e0a\u9650\uff08\u4f8b\u5982\u4e0d\u8d85\u8fc7\u5f53\u6708\u8d39\u7528\u768450%\uff09\u4e0e\u7533\u8bf7\u6d41\u7a0b\uff08\u662f\u5426\u9700\u5ba2\u6237\u4e3b\u52a8\u63d0\u4ea4\u5de5\u5355\u53ca\u8bc1\u636e\uff09\u3002<\/li>\n<li>\u8981\u6c42\u660e\u786e\u8d54\u4ed8\u8ba1\u7b97\u516c\u5f0f\uff1a\u6309\u4e0d\u53ef\u7528\u65f6\u95f4*\u5f53\u6708\u8d39\u7528\/\u5f53\u6708\u603b\u65f6\u95f4\uff0c\u907f\u514d\u4f9b\u5e94\u5546\u6309\u81ea\u5df1\u4e0d\u900f\u660e\u7684\u65b9\u6cd5\u6838\u7b97\u3002<\/li>\n<\/ul>\n<h3>4. 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