{"id":210051,"date":"2025-10-24T04:37:43","date_gmt":"2025-10-23T20:37:43","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210051\/"},"modified":"2025-10-24T04:37:44","modified_gmt":"2025-10-23T20:37:44","slug":"cdn-259","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210051\/","title":{"rendered":"CDN\u7f13\u5b58\u7b56\u7565\u8fd0\u7ef4\u5b9e\u6218\uff1a\u9632\u96ea\u5d29\u3001\u964d\u56de\u6e90\u7684\u843d\u5730\u6280\u5de7"},"content":{"rendered":"<p>\u5728\u4e92\u8054\u7f51\u670d\u52a1\u67b6\u6784\u4e2d\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u4e0d\u4ec5\u80fd\u52a0\u901f\u9759\u6001\u8d44\u6e90\uff0c\u8fd8\u5728\u4fdd\u62a4\u6e90\u7ad9\u3001\u964d\u4f4e\u5e26\u5bbd\u6210\u672c\u4e0e\u63d0\u5347\u53ef\u7528\u6027\u65b9\u9762\u53d1\u6325\u5173\u952e\u4f5c\u7528\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u5355\u7eaf\u542f\u7528 CDN \u5e76\u4e0d\u80fd\u5b8c\u5168\u907f\u514d\u56de\u6e90\u98ce\u66b4\u6216\u96ea\u5d29\u6548\u5e94\u3002\u672c\u6587\u4ece\u539f\u7406\u5230\u843d\u5730\uff0c\u7ed3\u5408\u8fd0\u7ef4\u5b9e\u6218\u6280\u5de7\uff0c\u7cfb\u7edf\u6027\u8bb2\u89e3\u5982\u4f55\u901a\u8fc7\u7f13\u5b58\u7b56\u7565\u3001\u964d\u56de\u6e90\u8bbe\u8ba1\u4e0e\u8fd0\u7ef4\u624b\u6bb5\uff0c\u5207\u5b9e\u6291\u5236\u201c\u7f13\u5b58\u96ea\u5d29\u201d\u548c\u201c\u56de\u6e90\u6f6e\u201d\uff0c\u5e76\u5728\u9009\u8d2d\u6d77\u5916\u53ca\u9999\u6e2f\u8282\u70b9\uff08\u5982\u9999\u6e2f\u670d\u52a1\u5668\u3001\u9999\u6e2fVPS\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u7f8e\u56fdVPS\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff09\u65f6\u7ed9\u51fa\u5efa\u8bae\u3002<\/p>\n<h2>\u4e00\u3001\u6838\u5fc3\u539f\u7406\uff1a\u4e3a\u4ec0\u4e48\u4f1a\u53d1\u751f\u96ea\u5d29\u4e0e\u56de\u6e90\u6fc0\u589e<\/h2>\n<p>\u7406\u89e3\u95ee\u9898\u6765\u6e90\u6709\u52a9\u4e8e\u8bbe\u8ba1\u5bf9\u7b56\u3002\u5e38\u89c1\u89e6\u53d1\u573a\u666f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u7f13\u5b58\u540c\u65f6\u8fc7\u671f\uff1a\u5927\u91cf\u70ed\u95e8\u8d44\u6e90\u8bbe\u7f6e\u76f8\u540c TTL\uff0c\u5230\u671f\u77ac\u95f4\u5927\u91cf\u8bf7\u6c42\u76f4\u63a5\u56de\u6e90\u3002<\/li>\n<li>\u7f13\u5b58\u672a\u547d\u4e2d\u7387\u9ad8\uff1a\u9519\u8bef\u7684\u7f13\u5b58\u952e\uff08Cache Key\uff09\u6216\u672a\u7f13\u5b58\u52a8\u6001\u8d44\u6e90\u5bfc\u81f4\u9ad8\u56de\u6e90\u3002<\/li>\n<li>\u7f13\u5b58\u6296\u52a8\/\u9891\u7e41\u6e05\u7406\uff1a\u8fc7\u5ea6\u4e3b\u52a8\u5237\u65b0\uff08Purge\uff09\u6216\u81ea\u52a8\u5931\u6548\u7b56\u7565\u4e0d\u5408\u7406\u3002<\/li>\n<li>\u6e90\u7ad9\u5bb9\u91cf\u4e0d\u8db3\uff1a\u56de\u6e90\u8bf7\u6c42\u5e76\u53d1\u5927\u4e8e\u6e90\u7ad9\u627f\u53d7\u9608\u503c\uff0c\u5bfc\u81f4CPU\/IO\/DB\u538b\u529b\u5267\u589e\u3002<\/li>\n<li>\u7f13\u5b58\u5206\u5c42\u4e0d\u5f53\uff1a\u7f3a\u4e4f\u8fb9\u7f18\u5c42\/\u4e2d\u95f4\u5c42\uff08\u5982\u4e2d\u95f4\u7f13\u5b58\u3001Origin Shield\uff09\uff0c\u5bfc\u81f4\u540c\u4e00\u65f6\u95f4\u5927\u91cf\u8bf7\u6c42\u76f4\u8fbe\u6e90\u7ad9\u3002<\/li>\n<\/ul>\n<h2>\u4e8c\u3001\u5173\u952e\u6280\u672f\u4e0e\u5b9e\u6218\u7b56\u7565<\/h2>\n<h3>1. \u7cbe\u7ec6\u5316 TTL \u4e0e\u5206\u7ea7\u7f13\u5b58<\/h3>\n<p>\u4e0d\u8981\u628a\u6240\u6709\u8d44\u6e90\u90fd\u8bbe\u6210\u540c\u4e00\u4e2a TTL\u3002\u5efa\u8bae\uff1a<\/p>\n<ul>\n<li>\u9759\u6001\u8d44\u6e90\uff08\u56fe\u7247\u3001JS\/CSS\uff09\uff1a\u957f TTL\uff08\u5982 1 \u5929\u5230 30 \u5929\uff09\uff0c\u5e76\u4f7f\u7528\u7248\u672c\u5316\u7b56\u7565\uff08query string \u6216\u6587\u4ef6\u540d\u5185\u5d4c hash\uff09\u3002<\/li>\n<li>\u534a\u9759\u6001\u5185\u5bb9\uff08\u7528\u6237\u8d44\u6599\u3001\u5546\u54c1\u8be6\u60c5\uff09\uff1a\u4e2d\u7b49 TTL\uff08\u51e0\u5206\u949f\u5230\u51e0\u5c0f\u65f6\uff09\uff0c\u5e76\u652f\u6301\u4e3b\u52a8\u5237\u65b0\u7b56\u7565\u3002<\/li>\n<li>\u52a8\u6001\u5185\u5bb9\uff1a\u77ed TTL \u6216\u4e0d\u7f13\u5b58\uff0c\u540c\u65f6\u8003\u8651\u8fb9\u7f18\u7f13\u5b58\u52a8\u6001\u7247\u6bb5\uff08Edge Side Includes\uff09\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u5206\u5c42\u7f13\u5b58\uff08Edge \u2192 Regional POP \u2192 Origin Shield \u2192 Origin\uff09\uff0c\u53ef\u4ee5\u628a\u5927\u90e8\u5206\u6d41\u91cf\u5438\u6536\u5230\u79bb\u7528\u6237\u6700\u8fd1\u7684\u5c42\u6b21\uff0c\u4ece\u800c\u964d\u4f4e\u56de\u6e90\u538b\u529b\u3002<\/p>\n<h3>2. \u4f7f\u7528 Stale-While-Revalidate \u4e0e Grace Time<\/h3>\n<p>\u5f53\u7f13\u5b58\u8fc7\u671f\u65f6\uff0c\u5141\u8bb8 CDN \u8fd4\u56de\u201c\u8fc7\u671f\u4f46\u4ecd\u53ef\u7528\u201d\u7684\u526f\u672c\u7ed9\u7528\u6237\uff0c\u540c\u65f6\u5728\u540e\u53f0\u5f02\u6b65\u56de\u6e90\u5237\u65b0\u7f13\u5b58\uff08stale-while-revalidate\uff09\u3002\u8fd9\u4f1a\u663e\u8457\u964d\u4f4e\u7528\u6237\u7b49\u5f85\u65f6\u95f4\u4e0e\u56de\u6e90\u5cf0\u503c\u3002\u5e38\u89c1\u7684\u5934\u90e8\u914d\u7f6e\uff1a<\/p>\n<ul>\n<li>Cache-Control: max-age=300, stale-while-revalidate=60<\/li>\n<li>\u540c\u65f6\u542f\u7528\u201cstale-if-error\u201d\u4ee5\u9632\u6e90\u7ad9\u77ed\u65f6\u4e0d\u53ef\u7528\u65f6\u4f9d\u7136\u80fd\u63d0\u4f9b\u5185\u5bb9\u3002<\/li>\n<\/ul>\n<p>\u53e6\u5916\uff0c\u8bbe\u7f6e\u201cgrace time\u201d\u5728\u6e90\u7ad9\u4e0d\u7a33\u5b9a\u6216\u7f51\u7edc\u6296\u52a8\u65f6\u4f9d\u7136\u63d0\u4f9b\u65e7\u5185\u5bb9\uff0c\u907f\u514d\u5168\u90e8\u8bf7\u6c42\u56de\u6e90\u3002<\/p>\n<h3>3. \u8bf7\u6c42\u5408\u5e76\uff08Request Coalescing \/ Locking\uff09<\/h3>\n<p>\u5f53\u5927\u91cf\u5e76\u53d1\u8bf7\u6c42\u547d\u4e2d\u540c\u4e00\u4e2a\u672a\u547d\u4e2d\u7f13\u5b58\u7684 key \u65f6\uff0c\u542f\u7528\u8bf7\u6c42\u5408\u5e76\u53ef\u4ee5\u8ba9\u7b2c\u4e00\u4e2a\u8bf7\u6c42\u56de\u6e90\u5e76\u5728\u5b8c\u6210\u540e\u628a\u7ed3\u679c\u5199\u5165\u7f13\u5b58\uff0c\u5176\u4ed6\u8bf7\u6c42\u7b49\u5f85\u8be5\u7ed3\u679c\uff0c\u907f\u514d\u91cd\u590d\u56de\u6e90\u3002\u5b9e\u73b0\u65b9\u5f0f\uff1a<\/p>\n<ul>\n<li>CDN \u5e73\u53f0\u5185\u5efa\uff1a\u5982\u4e00\u4e9b\u5546\u4e1a CDN \u63d0\u4f9b request coalescing \u914d\u7f6e\u3002<\/li>\n<li>\u4e0a\u6e38\u81ea\u5efa\u4e2d\u95f4\u5c42\uff1a\u4f7f\u7528\u5185\u5b58\u7f13\u5b58\uff08Redis\/L1 cache\uff09\u505a\u9501\uff08\u4f8b\u5982 SETNX \u6216 RedLock\uff09\uff0c\u7b2c\u4e00\u4e2a\u8fdb\u7a0b\u56de\u6e90\u5e76\u586b\u5145\u7f13\u5b58\u3002<\/li>\n<\/ul>\n<h3>4. Origin Shield \u4e0e\u4e2d\u8f6c\u5c42<\/h3>\n<p>Origin Shield \u662f\u5728 CDN \u4e0e\u6e90\u7ad9\u4e4b\u95f4\u989d\u5916\u7684\u4e00\u5c42\u4fdd\u62a4\u8282\u70b9\uff0c\u6240\u6709\u56de\u6e90\u8bf7\u6c42\u5148\u96c6\u4e2d\u5230\u8fd9\u4e2a\u8282\u70b9\uff0c\u518d\u7531\u5176\u7edf\u4e00\u53bb\u6e90\u3002\u8fd9\u80fd\uff1a<\/p>\n<ul>\n<li>\u51cf\u5c11\u6e90\u7ad9\u5e76\u53d1\u8fde\u63a5\u6570\u3002<\/li>\n<li>\u6c47\u805a\u5e76\u53bb\u91cd\u8bf7\u6c42\uff0c\u964d\u4f4e\u56de\u6e90\u9891\u7387\u3002<\/li>\n<li>\u4fbf\u4e8e\u5b9e\u65bd\u7edf\u4e00\u7684\u6d41\u91cf\u63a7\u5236\u548c\u7f13\u5b58\u7b56\u7565\u3002<\/li>\n<\/ul>\n<h3>5. \u6d41\u91cf\u524a\u5cf0\uff08Rate Limiting\/Load Shedding\uff09<\/h3>\n<p>\u5f53\u6301\u7eed\u56de\u6e90\u6d41\u91cf\u8d85\u8fc7\u6e90\u7ad9\u9608\u503c\u65f6\uff0c\u91c7\u7528\u964d\u7ea7\u7b56\u7565\uff1a<\/p>\n<ul>\n<li>\u5bf9\u975e\u5173\u952e\u6d41\u91cf\u8fd4\u56de\u7f13\u5b58\u65e7\u7248\u672c\u6216 503 \u5e76\u5e26 Retry-After\u3002<\/li>\n<li>\u5bf9\u722c\u866b\u6216\u5f02\u5e38\u6d41\u91cf\u8fdb\u884c\u901f\u7387\u9650\u5236\uff08\u901a\u8fc7 User-Agent\u3001IP\u3001\u8bf7\u6c42\u9891\u7387\u8bc6\u522b\uff09\u3002<\/li>\n<li>\u5b9e\u65bd\u201c\u56de\u6e90\u914d\u989d\uff08origin quota\uff09\u201d\uff0c\u5728\u8fbe\u5230\u914d\u989d\u65f6\u89e6\u53d1\u964d\u7ea7\u6216\u7194\u65ad\u3002<\/li>\n<\/ul>\n<h3>6. \u4e3b\u52a8\u5237\u65b0\uff08Purge\/Prefetch\/Prewarm\uff09\u7b56\u7565<\/h3>\n<p>\u5bf9\u4e8e\u6709\u8ba1\u5212\u7684\u5185\u5bb9\u66f4\u65b0\uff0c\u4e3b\u52a8\u5237\u65b0\u6bd4\u88ab\u52a8\u56de\u6e90\u66f4\u5e73\u6ed1\uff1a<\/p>\n<ul>\n<li>\u51b7\u542f\u52a8\u65f6\u9884\u70ed\uff08prewarm\/prefetch\uff09\uff1a\u5728\u6d41\u91cf\u9ad8\u5cf0\u524d\u4e3b\u52a8\u628a\u5173\u952e\u9875\u9762\u6216\u8d44\u6e90\u5237\u65b0\u5230\u8fb9\u7f18\u8282\u70b9\u3002<\/li>\n<li>\u5206\u6279 Purge\uff1a\u907f\u514d\u5bf9\u6240\u6709 POP \u540c\u65f6\u6e05\u7406\u3002\u91c7\u7528\u5206\u6bb5\u6e05\u7406\u6216\u5206\u533a\u6e05\u7406\u7b56\u7565\u3002<\/li>\n<li>\u5229\u7528\u7f13\u5b58\u53d8\u66f4\u901a\u77e5\uff08Cache Invalidation Hooks\uff09\u548c CI\/CD \u96c6\u6210\u505a\u81ea\u52a8\u5316\u5237\u65b0\u3002<\/li>\n<\/ul>\n<h3>7. \u667a\u80fd\u7f13\u5b58\u952e\u4e0e\u5185\u5bb9\u5206\u7247<\/h3>\n<p>\u8bbe\u8ba1\u5408\u7406\u7684 Cache Key \u80fd\u663e\u8457\u63d0\u9ad8\u547d\u4e2d\u7387\uff1a<\/p>\n<ul>\n<li>\u53bb\u6389\u4e0d\u5f71\u54cd\u5185\u5bb9\u53d8\u66f4\u7684\u67e5\u8be2\u53c2\u6570\uff08utm\u3001tracking \u7b49\uff09\u3002<\/li>\n<li>\u5bf9\u7528\u6237\u4e2a\u6027\u5316\u5185\u5bb9\u505a\u53d8\u4f53\uff08Vary\u3001Cookie\uff09\u6216\u5728\u9875\u9762\u5185\u628a\u53ef\u7f13\u5b58\u90e8\u5206\u62bd\u79bb\u51fa\u6765\u3002<\/li>\n<li>\u652f\u6301\u6309\u5730\u57df\u6216\u8bed\u8a00\u5206\u7247\u7f13\u5b58\uff08Locale-based caching\uff09\uff0c\u51cf\u5c11\u65e0\u5173\u56de\u6e90\u3002<\/li>\n<\/ul>\n<h3>8. \u76d1\u63a7\u4e0e\u544a\u8b66\uff1a\u6307\u6807\u4e0e\u53ef\u89c6\u5316<\/h3>\n<p>\u5173\u952e\u6307\u6807\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u7f13\u5b58\u547d\u4e2d\u7387\uff08edge hit ratio, regional hit ratio\uff09\u3002<\/li>\n<li>\u56de\u6e90\u6d41\u91cf\uff08RPS\uff0c\u5e26\u5bbd\uff09\uff0c\u56de\u6e90\u9519\u8bef\u7387\uff085xx\uff09\u3002<\/li>\n<li>\u6e90\u7ad9\u5173\u952e\u8d44\u6e90\u6307\u6807\uff1aCPU\u3001\u5185\u5b58\u3001DB \u8fde\u63a5\u6570\u3001\u78c1\u76d8 I\/O\u3001\u54cd\u5e94\u65f6\u95f4\uff08P95\/P99\uff09\u3002<\/li>\n<\/ul>\n<p>\u7ed3\u5408\u5b9e\u65f6\u544a\u8b66\uff08\u5982\u56de\u6e90 RPS \u7a81\u589e\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u9aa4\u964d\uff09\u5e76\u89e6\u53d1\u81ea\u52a8\u5316\u811a\u672c\uff08\u5982\u542f\u52a8\u9884\u70ed\u3001\u5207\u6362\u56de\u9000\u9875\u9762\uff09\uff0c\u80fd\u5728\u95ee\u9898\u521d\u671f\u627c\u6740\u96ea\u5d29\u3002<\/p>\n<h2>\u4e09\u3001\u4e0d\u540c\u5e94\u7528\u573a\u666f\u4e0b\u7684\u843d\u5730\u793a\u4f8b<\/h2>\n<h3>\u7535\u5546\u9ad8\u5e76\u53d1\u79d2\u6740<\/h3>\n<ul>\n<li>\u5c06\u5546\u54c1\u8be6\u60c5\u9875\u62c6\u5206\uff1a\u9759\u6001\u90e8\u5206\u7f13\u5b58\u957f\u671f\u6709\u6548\uff0c\u5e93\u5b58\/\u4ef7\u683c\u7528 AJAX \u5355\u72ec\u8bf7\u6c42\u5e76\u7f13\u5b58\u77ed\u65f6\u6bb5\u6216\u91c7\u7528\u957f\u8f6e\u8be2\/\u6d88\u606f\u961f\u5217\u540c\u6b65\u3002<\/li>\n<li>\u4f7f\u7528\u4ee4\u724c\u6876\u6216\u6f0f\u6876\u7b97\u6cd5\u8fdb\u884c\u62a2\u8d2d\u8bf7\u6c42\u7684\u901f\u7387\u63a7\u5236\uff1b\u5728\u8fb9\u7f18\u5b9e\u73b0\u521d\u6b65\u9650\u6d41\u3002<\/li>\n<li>\u9884\u70ed\u70ed\u95e8 SKU \u5230\u8fb9\u7f18\u8282\u70b9\uff0c\u7ed3\u5408 Origin Shield \u907f\u514d\u56de\u6e90\u96c6\u4e2d\u3002<\/li>\n<\/ul>\n<h3>\u65b0\u95fb\u5a92\u4f53\/\u95e8\u6237\u7f51\u7ad9<\/h3>\n<ul>\n<li>\u6587\u7ae0\u9875\u53ef\u7528\u957f TTL \u5e76\u914d\u5408\u4e3b\u52a8\u6e05\u7406\u6587\u7ae0\u66f4\u65b0\u7684\u5c40\u90e8\u8d44\u6e90\u3002<\/li>\n<li>\u70ed\u70b9\u4e8b\u4ef6\u901a\u8fc7\u9884\u70ed\u5e76\u542f\u7528 stale-while-revalidate\uff0c\u786e\u4fdd\u7528\u6237\u5728\u5237\u65b0\u65f6\u80fd\u62ff\u5230\u53ef\u7528\u5185\u5bb9\u3002<\/li>\n<\/ul>\n<h3>API \u670d\u52a1\u4e0e\u7b2c\u4e09\u65b9\u63a5\u53e3<\/h3>\n<ul>\n<li>\u5bf9 GET \u63a5\u53e3\u542f\u7528\u77ed\u65f6\u7f13\u5b58\uff08\u5982 10 \u79d2\u5230 60 \u79d2\uff09\uff0c\u5bf9\u4e8e\u9ad8\u9891\u8bfb\u64cd\u4f5c\u53ef\u52a0\u4e0a request coalescing\u3002<\/li>\n<li>\u5bf9\u5199\u64cd\u4f5c\u4f7f\u7528\u5e42\u7b49\u7b56\u7565\u5e76\u5f15\u5165\u6d88\u606f\u961f\u5217\u5f02\u6b65\u5904\u7406\uff0c\u51cf\u8f7b\u77ac\u65f6\u5199\u538b\u529b\u3002<\/li>\n<\/ul>\n<h2>\u56db\u3001\u4f18\u52bf\u5bf9\u6bd4\uff1a\u7f13\u5b58\u7b56\u7565 vs \u589e\u5f3a\u6e90\u7ad9\u8d44\u6e90<\/h2>\n<p><strong>\u7f13\u5b58\u4f18\u5316<\/strong>\u7684\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li>\u6210\u672c\u4f4e\uff1a\u5e26\u5bbd\u4e0e\u8ba1\u7b97\u6210\u672c\u663e\u8457\u4e0b\u964d\u3002<\/li>\n<li>\u5ef6\u8fdf\u4f4e\uff1a\u7528\u6237\u8bbf\u95ee\u66f4\u5feb\uff0c\u4f53\u9a8c\u66f4\u597d\u3002<\/li>\n<li>\u53ef\u6269\u5c55\u6027\u597d\uff1a\u8fb9\u7f18\u6269\u5c55\u6bd4\u6e90\u7ad9\u6269\u5bb9\u66f4\u4e3a\u7ecf\u6d4e\u3002<\/li>\n<\/ul>\n<p><strong>\u589e\u5f3a\u6e90\u7ad9<\/strong>\uff08\u589e\u52a0\u670d\u52a1\u5668\u3001\u6570\u636e\u5e93\u6269\u5bb9\uff09\u7684\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li>\u80fd\u5904\u7406\u590d\u6742\u7684\u52a8\u6001\u8ba1\u7b97\uff0c\u786e\u4fdd\u4e1a\u52a1\u903b\u8f91\u6b63\u786e\u3002<\/li>\n<li>\u5bf9\u7f13\u5b58\u5931\u6548\u6216\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u573a\u666f\u66f4\u52a0\u7a33\u5065\u3002<\/li>\n<\/ul>\n<p>\u7efc\u4e0a\uff0c\u6700\u4f73\u65b9\u6848\u901a\u5e38\u662f\u4e8c\u8005\u7ed3\u5408\uff1a\u628a\u201c\u53ef\u7f13\u5b58\u201d\u7684\u5c3d\u91cf\u7f13\u5b58\u5230\u8fb9\u7f18\uff0c\u628a\u201c\u4e0d\u53ef\u7f13\u5b58\u201d\u7684\u901a\u8fc7\u67b6\u6784\u8bbe\u8ba1\uff08\u5f02\u6b65\u5316\u3001\u5206\u5c42\u3001\u9650\u6d41\uff09\u4fdd\u62a4\u597d\u6e90\u7ad9\u3002<\/p>\n<h2>\u4e94\u3001\u9009\u8d2d\u5efa\u8bae\uff08\u8282\u70b9\u4e0e\u670d\u52a1\u5668\u9009\u62e9\uff09<\/h2>\n<p>\u5728\u9009\u62e9 CDN \u4e0e\u6e90\u7ad9\u65f6\uff0c\u8981\u8003\u8651\u5730\u7406\u8986\u76d6\u3001\u8282\u70b9\u8d28\u91cf\u4e0e\u914d\u5957\u670d\u52a1\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u76ee\u6807\u7528\u6237\u5728\u9999\u6e2f\/\u4e1c\u5357\u4e9a\uff0c\u4f18\u5148\u9009\u62e9\u5728\u9999\u6e2f\u3001\u65b0\u52a0\u5761\u3001\u65e5\u672c\u3001\u97e9\u56fd\u6709\u4f18\u8d28 PoP \u7684 CDN\uff0c\u5e76\u628a\u6e90\u7ad9\u90e8\u7f72\u5728\u9999\u6e2f\u670d\u52a1\u5668\u6216\u9999\u6e2fVPS \u4e0a\u4ee5\u964d\u4f4e\u56de\u6e90\u5ef6\u8fdf\u3002<\/li>\n<li>\u82e5\u7528\u6237\u5728\u7f8e\u6d32\u6216\u5168\u7403\u5206\u5e03\uff0c\u4f7f\u7528\u5728\u7f8e\u56fd\u670d\u52a1\u5668\/\u7f8e\u56fdVPS \u4e0a\u7684\u6e90\u7ad9\u5e76\u7ed3\u5408\u5168\u7403 PoP \u7684 CDN \u66f4\u5408\u9002\u3002<\/li>\n<li>\u8bc4\u4f30 CDN \u662f\u5426\u652f\u6301 Request Coalescing\u3001Origin Shield\u3001stale-while-revalidate\u3001\u6309\u533a\u57df\u5206\u5c42\u7f13\u5b58\u7b49\u9ad8\u7ea7\u7279\u6027\u3002<\/li>\n<li>\u76d1\u6d4b\u8282\u70b9\u5065\u5eb7\u4e0e\u56de\u6e90\u8def\u5f84\uff0c\u4f18\u5148\u9009\u53d6\u80fd\u63d0\u4f9b\u65e5\u5fd7\u3001\u5b9e\u65f6\u76d1\u63a7\u4e0e\u53ef\u89c6\u5316\u7684\u670d\u52a1\u5546\u3002<\/li>\n<\/ul>\n<p>\u6b64\u5916\uff0c\u57df\u540d\u89e3\u6790\u4e0e\u6ce8\u518c\u4e5f\u4f1a\u5f71\u54cd\u8bbf\u95ee\u8def\u5f84\u4e0e\u52a0\u901f\u7b56\u7565\uff0c\u5efa\u8bae\u5728\u8d2d\u4e70\u57df\u540d\u6ce8\u518c\u670d\u52a1\u65f6\uff0c\u786e\u4fdd\u652f\u6301 DNS \u89e3\u6790\u7b56\u7565\uff08\u5982 GeoDNS\u3001Latency-based routing\uff09\uff0c\u4ee5\u914d\u5408 CDN \u7684\u6d41\u91cf\u8c03\u5ea6\u3002<\/p>\n<h2>\u516d\u3001\u8fd0\u7ef4\u6d41\u7a0b\u4e0e\u5e94\u6025\u9884\u6848<\/h2>\n<p>\u5728\u65e5\u5e38\u8fd0\u7ef4\u4e2d\uff0c\u5efa\u8bae\u5efa\u7acb\u6807\u51c6\u5316\u6d41\u7a0b\uff1a<\/p>\n<ul>\n<li>\u53d8\u66f4\u524d\uff1a\u5728\u4f4e\u6d41\u91cf\u7a97\u53e3\u505a\u914d\u7f6e\u6d4b\u8bd5\uff08\u7f13\u5b58\u7b56\u7565\u3001PURGE \u811a\u672c\u3001\u5b89\u5168\u89c4\u5219\uff09\u3002<\/li>\n<li>\u9ad8\u5cf0\u671f\uff1a\u5f00\u542f\u9884\u70ed\u4e0e\u964d\u7ea7\u7b56\u7565\uff0c\u5b9e\u65f6\u76d1\u63a7\u56de\u6e90\u4e0e\u7f13\u5b58\u547d\u4e2d\u7387\u3002<\/li>\n<li>\u6545\u969c\u65f6\uff1a\u6309\u9884\u6848\u6267\u884c\u2014\u2014\u5148\u542f\u7528\u964d\u7ea7\u9875\u9762\/\u7f13\u5b58\u65e7\u7248\u5185\u5bb9\uff0c\u968f\u540e\u9010\u6b65\u6062\u590d\u5e76\u56de\u6eaf\u539f\u56e0\uff08\u662f\u914d\u7f6e\u3001\u6e90\u7801\u8fd8\u662f CDN \u7f51\u7edc\u95ee\u9898\uff09\u3002<\/li>\n<\/ul>\n<p>\u5b9a\u671f\u8fdb\u884c Chaos Testing\uff08\u6df7\u6c8c\u5de5\u7a0b\uff09\u6a21\u62df\u56de\u6e90\u5931\u8d25\u3001\u8282\u70b9\u5b95\u673a\u7b49\u573a\u666f\uff0c\u9a8c\u8bc1 stale-while-revalidate\u3001origin shield \u548c\u9650\u6d41\u7b56\u7565\u7684\u6709\u6548\u6027\u3002<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u9632\u6b62 CDN \u7f13\u5b58\u96ea\u5d29\u4e0e\u964d\u4f4e\u56de\u6e90\uff0c\u662f\u4e00\u9879\u9700\u8981\u7b56\u7565\u3001\u6280\u672f\u4e0e\u8fd0\u7ef4\u6d41\u7a0b\u7ed3\u5408\u7684\u5de5\u7a0b\u3002\u901a\u8fc7\u7cbe\u7ec6 TTL \u7b56\u7565\u3001stale-while-revalidate\u3001\u8bf7\u6c42\u5408\u5e76\u3001Origin Shield\u3001\u6d41\u91cf\u524a\u5cf0\u4e0e\u4e3b\u52a8\u9884\u70ed\uff0c\u53ef\u4ee5\u628a\u7edd\u5927\u591a\u6570\u56de\u6e90\u98ce\u9669\u627c\u6740\u5728\u840c\u82bd\u3002\u7ed3\u5408\u5408\u9002\u7684\u6e90\u7ad9\u90e8\u7f72\uff08\u5982\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u5176\u4ed6\u6d77\u5916\u670d\u52a1\u5668\uff0fVPS\uff09\u4e0e\u53ef\u9760\u7684 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