{"id":210398,"date":"2025-10-29T13:51:31","date_gmt":"2025-10-29T05:51:31","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210398\/"},"modified":"2025-10-29T13:51:32","modified_gmt":"2025-10-29T05:51:32","slug":"cdn-392","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210398\/","title":{"rendered":"CDN \u667a\u80fd\u8def\u7531\u4e0e\u7f13\u5b58\u8c03\u5ea6\u5b9e\u6218\uff1a\u63d0\u5347\u6027\u80fd\u4e0e\u547d\u4e2d\u7387"},"content":{"rendered":"<p>\u5728\u5f53\u4eca\u5168\u7403\u5316\u7684\u4e92\u8054\u7f51\u73af\u5883\u4e2d\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u4e0d\u4ec5\u4ec5\u662f\u9759\u6001\u8d44\u6e90\u7684\u5206\u53d1\u5de5\u5177\uff0c<strong>\u667a\u80fd\u8def\u7531\u4e0e\u7f13\u5b58\u8c03\u5ea6<\/strong>\u7684\u4f18\u5316\u5df2\u7ecf\u6210\u4e3a\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3001\u51cf\u5c11\u5e26\u5bbd\u6210\u672c\u548c\u63d0\u9ad8\u547d\u4e2d\u7387\u7684\u5173\u952e\u624b\u6bb5\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u6df1\u5165\u5256\u6790 CDN \u667a\u80fd\u8def\u7531\u4e0e\u7f13\u5b58\u8c03\u5ea6\u7684\u539f\u7406\u3001\u5e94\u7528\u573a\u666f\u3001\u4f18\u52bf\u5bf9\u6bd4\u5e76\u7ed9\u51fa\u9009\u8d2d\u548c\u90e8\u7f72\u5efa\u8bae\uff0c\u5e2e\u52a9\u4f60\u5728\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u5176\u4ed6\u6d77\u5916\u8282\u70b9\u65f6\uff0c\u83b7\u5f97\u66f4\u597d\u7684\u6027\u80fd\u548c\u66f4\u9ad8\u7684\u7f13\u5b58\u547d\u4e2d\u7387\u3002<\/p>\n<h2>\u4e00\u3001\u667a\u80fd\u8def\u7531\u4e0e\u7f13\u5b58\u8c03\u5ea6\u7684\u57fa\u7840\u539f\u7406<\/h2>\n<p>\u667a\u80fd\u8def\u7531\u4e0e\u7f13\u5b58\u8c03\u5ea6\u6d89\u53ca\u4e24\u5927\u6838\u5fc3\u5c42\u9762\uff1a<strong>\u5982\u4f55\u628a\u7528\u6237\u8bf7\u6c42\u8def\u7531\u5230\u6700\u4f73\u8282\u70b9\uff08\u667a\u80fd\u8def\u7531\uff09<\/strong>\u4ee5\u53ca<strong>\u5982\u4f55\u5728\u8282\u70b9\u5185\u90e8\u7ba1\u7406\u8d44\u6e90\u4ee5\u6700\u5927\u5316\u547d\u4e2d\u4e0e\u5229\u7528\u7387\uff08\u7f13\u5b58\u8c03\u5ea6\uff09<\/strong>\u3002<\/p>\n<h3>\u667a\u80fd\u8def\u7531\uff1a\u5e38\u89c1\u7b97\u6cd5\u4e0e\u5b9e\u73b0<\/h3>\n<ul>\n<li><strong>\u57fa\u4e8e\u5730\u7406\u4f4d\u7f6e\u7684\u8def\u7531\uff08GeoDNS\/GeoIP\uff09<\/strong>\uff1a\u7b80\u5355\u4e14\u5e38\u7528\uff0c\u6839\u636e\u7528\u6237 IP \u5730\u7406\u4f4d\u7f6e\u8fd4\u56de\u6700\u8fd1\u7684\u8282\u70b9 IP\uff0c\u9002\u7528\u4e8e\u5ef6\u8fdf\u4e0e\u5730\u57df\u6027\u5f3a\u7684\u9759\u6001\u5185\u5bb9\u5206\u53d1\u3002<\/li>\n<li><strong>Anycast+BGP<\/strong>\uff1a\u901a\u8fc7\u540c\u4e00 IP \u5728\u5168\u7403\u591a\u4e2a\u6570\u636e\u4e2d\u5fc3\u540c\u65f6\u516c\u544a\uff0c\u63d0\u9ad8\u8def\u7531\u7684\u5feb\u901f\u5230\u8fbe\u6027\u548c\u6545\u969c\u5207\u6362\u80fd\u529b\uff0c\u9002\u5408\u5bf9\u53ef\u7528\u6027\u8981\u6c42\u9ad8\u7684\u670d\u52a1\u3002<\/li>\n<li><strong>\u6d4b\u91cf\u9a71\u52a8\u7684\u5ef6\u8fdf\u8def\u7531\uff08Latency-based Routing\uff09<\/strong>\uff1a\u901a\u8fc7\u4e3b\u52a8\u63a2\u6d4b\uff08ping\u3001http probe\uff09\u6216\u88ab\u52a8\u91c7\u96c6\uff08\u771f\u5b9e\u8bf7\u6c42 RTT\uff09\u8bc4\u4f30\u8282\u70b9\u5ef6\u8fdf\uff0c\u5e76\u628a\u8bf7\u6c42\u8f6c\u53d1\u5230 RTT \u6700\u5c0f\u7684\u8282\u70b9\u3002<\/li>\n<li><strong>\u8d1f\u8f7d\u611f\u77e5\u8def\u7531\uff08Load-aware\uff09<\/strong>\uff1a\u8003\u8651\u8282\u70b9\u7684\u5f53\u524d\u8d1f\u8f7d\u3001\u5065\u5eb7\u72b6\u6001\u548c\u5e26\u5bbd\u4f7f\u7528\u60c5\u51b5\uff0c\u7ed3\u5408\u5ef6\u8fdf\u548c\u5bb9\u91cf\u505a\u7efc\u5408\u51b3\u7b56\u3002<\/li>\n<li><strong>\u591a\u56e0\u7d20\u7b56\u7565\u4e0e\u5b9e\u65f6\u51b3\u7b56<\/strong>\uff1a\u7ed3\u5408 DNS\u3001Anycast\u3001HTTP \u91cd\u5b9a\u5411\u6216\u8fb9\u7f18\u667a\u80fd\u51b3\u7b56\uff08edge-side routing\uff09\uff0c\u6309\u4e1a\u52a1\u573a\u666f\u52a8\u6001\u5207\u6362\u7b56\u7565\uff0c\u517c\u987e\u5ef6\u8fdf\u3001\u53ef\u7528\u6027\u4e0e\u6210\u672c\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u8c03\u5ea6\uff1a\u7b56\u7565\u4e0e\u673a\u5236<\/h3>\n<ul>\n<li><strong>\u7f13\u5b58\u66ff\u6362\u7b56\u7565<\/strong>\uff1aLRU\u3001LFU\u3001ARC \u7b49\u7b97\u6cd5\u5404\u6709\u4fa7\u91cd\u3002LRU \u7b80\u5355\u9ad8\u6548\uff0cLFU \u5728\u957f\u5c3e\u8bbf\u95ee\u573a\u666f\u547d\u4e2d\u7387\u66f4\u4f18\uff0cARC \u5728\u6df7\u5408\u8d1f\u8f7d\u4e0b\u8868\u73b0\u66f4\u7a33\u5b9a\u3002<\/li>\n<li><strong>\u7f13\u5b58\u4e00\u81f4\u6027\u4e0e\u8fc7\u671f\u63a7\u5236<\/strong>\uff1a\u901a\u8fc7 Cache-Control\u3001ETag\u3001Last-Modified \u4ee5\u53ca TTL \u63a7\u5236\u7f13\u5b58\u5bff\u547d\u3002\u5f15\u5165 stale-while-revalidate \u4e0e stale-if-error \u53ef\u4ee5\u5728\u540e\u7aef\u4e0d\u53ef\u7528\u65f6\u4ecd\u63d0\u4f9b\u670d\u52a1\u3002<\/li>\n<li><strong>\u5206\u7ea7\u7f13\u5b58\u4e0e Origin Shield<\/strong>\uff1a\u5728\u8fb9\u7f18\u8282\u70b9\u4e4b\u4e0a\u8bbe\u7f6e\u4e2d\u5c42\u7f13\u5b58\uff08\u6216\u4f7f\u7528 Origin Shield\uff09\uff0c\u51cf\u5c11\u5bf9\u6e90\u7ad9\u7684\u8bf7\u6c42\u6b21\u6570\uff0c\u4fdd\u62a4\u6e90\u7ad9\u5e76\u63d0\u9ad8\u603b\u4f53\u547d\u4e2d\u7387\u3002<\/li>\n<li><strong>\u9884\u53d6\uff08Prefetch\uff09\u4e0e\u7f13\u5b58\u9884\u70ed\uff08Warm-up\uff09<\/strong>\uff1a\u5bf9\u5927\u6d41\u91cf\u6d3b\u52a8\u6216\u70ed\u70b9\u5185\u5bb9\u63d0\u524d\u9884\u52a0\u8f7d\uff0c\u907f\u514d\u7f13\u5b58\u672a\u547d\u4e2d\u9020\u6210\u7684\u77ac\u65f6\u9ad8\u8d1f\u8f7d\u3002<\/li>\n<li><strong>\u52a8\u6001\u5185\u5bb9\u4e0e\u8fb9\u7f18\u8ba1\u7b97<\/strong>\uff1a\u5bf9\u4e8e\u4e2a\u6027\u5316\u6216\u52a8\u6001\u5185\u5bb9\uff0c\u91c7\u7528\u7f13\u5b58\u5206\u7247\uff08cache key \u7cbe\u7ec6\u5316\uff09\u3001\u8fb9\u7f18\u6e32\u67d3\uff08Edge Rendering\uff09\u6216\u5fae\u7f13\u5b58\uff08\u77ed TTL\uff09\u7b56\u7565\u6765\u5e73\u8861\u65b0\u9c9c\u5ea6\u4e0e\u547d\u4e2d\u7387\u3002<\/li>\n<\/ul>\n<h2>\u4e8c\u3001\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u8df5\u5efa\u8bae<\/h2>\n<h3>\u9759\u6001\u5927\u6587\u4ef6\u5206\u53d1\uff08\u5982\u89c6\u9891\u3001\u955c\u50cf\u3001\u9759\u6001\u8d44\u6e90\uff09<\/h3>\n<p>\u5efa\u8bae\u91c7\u7528 Anycast + \u5730\u7406\/\u5ef6\u8fdf\u8def\u7531\u7ed3\u5408\u7684\u7b56\u7565\uff0c\u5e76\u5728\u8fb9\u7f18\u8282\u70b9\u4f7f\u7528\u8f83\u957f TTL\u3001\u6309\u5b57\u8282\u547d\u4e2d\u7387\u4f18\u5316\uff08Byte Hit Ratio\uff09\u3002\u5927\u6587\u4ef6\u53ef\u4f7f\u7528\u5206\u6bb5\u4f20\u8f93\uff08Range Requests\uff09\u914d\u5408\u5e76\u884c\u4e0b\u8f7d\u63d0\u5347\u541e\u5410\u3002\u5bf9\u8de8\u5883\u4ea4\u4ed8\uff0c\u5982\u4ece\u9999\u6e2f\u670d\u52a1\u5668\u5411\u4e1c\u5357\u4e9a\u6216\u65e5\u672c\u3001\u97e9\u56fd\u7528\u6237\u5206\u53d1\uff0c\u5408\u7406\u5e03\u5c40\u9999\u6e2fVPS\u3001\u97e9\u56fd\u670d\u52a1\u5668\u4e0e\u65b0\u52a0\u5761\u670d\u52a1\u5668\u8282\u70b9\u80fd\u663e\u8457\u964d\u4f4e\u5ef6\u8fdf\u3002<\/p>\n<h3>\u5168\u7403\u52a0\u901f\u4e0e\u5b9e\u65f6\u5e94\u7528\uff08\u6e38\u620f\u3001\u76f4\u64ad\u3001API\uff09<\/h3>\n<p>\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u573a\u666f\uff0c\u4f18\u5148\u9009\u62e9 Anycast+BGP \u4e0e\u6d4b\u91cf\u9a71\u52a8\u8def\u7531\uff0c\u7ed3\u5408 QUIC\/HTTP\/3\u3001HTTP\/2 \u591a\u8def\u590d\u7528\u3001TLS \u4f1a\u8bdd\u7968\u636e\u590d\u7528\u7b49\u6280\u672f\u51cf\u5c11\u63e1\u624b\u5ef6\u8fdf\u3002API \u7f51\u5173\u53ef\u91c7\u7528\u77ed\u7f13\u5b58+\u8fb9\u7f18\u8ba1\u7b97\uff08Edge Functions\uff09\u7b56\u7565\uff0c\u7f13\u5b58\u9891\u7e41\u67e5\u8be2\u7684\u53ea\u8bfb\u7ed3\u679c\u4ee5\u964d\u4f4e\u6e90\u7ad9\u538b\u529b\u3002<\/p>\n<h3>\u7535\u5546\u4e0e\u4e2a\u6027\u5316\u7f51\u7ad9<\/h3>\n<p>\u4e2a\u6027\u5316\u5185\u5bb9\u9700\u7ec6\u5316\u7f13\u5b58\u952e\uff08cookie\u3001\u8bf7\u6c42\u5934\u3001\u53c2\u6570\uff09\uff0c\u5c06\u53ef\u5171\u4eab\u90e8\u5206\uff08\u56fe\u3001\u811a\u672c\u3001\u6837\u5f0f\uff09\u4e0e\u52a8\u6001\u6570\u636e\u5206\u79bb\u3002\u4f7f\u7528 stale-while-revalidate \u80fd\u5728\u9ad8\u5e76\u53d1\u4fc3\u9500\u671f\u4fdd\u6301\u7528\u6237\u4f53\u9a8c\u5e76\u5f02\u6b65\u5237\u65b0\u7f13\u5b58\u3002<\/p>\n<h2>\u4e09\u3001\u5173\u952e\u6307\u6807\u4e0e\u4f18\u5316\u624b\u6bb5<\/h2>\n<ul>\n<li><strong>\u547d\u4e2d\u7387\uff08Request Hit Ratio\uff09<\/strong>\uff1a\u8861\u91cf\u8bf7\u6c42\u5c42\u9762\u7684\u7f13\u5b58\u547d\u4e2d\uff0c\u76f4\u63a5\u53cd\u6620\u7f13\u5b58\u7b56\u7565\u6548\u679c\u3002\u63d0\u5347\u65b9\u6cd5\uff1a\u589e\u52a0 TTL\u3001\u4f18\u5316\u7f13\u5b58\u952e\u3001\u9884\u70ed\u70ed\u95e8\u5bf9\u8c61\u3002<\/li>\n<li><strong>\u5b57\u8282\u547d\u4e2d\u7387\uff08Byte Hit Ratio\uff09<\/strong>\uff1a\u8861\u91cf\u4f20\u8f93\u5b57\u8282\u5c42\u9762\u7684\u547d\u4e2d\uff0c\u5bf9\u4e8e\u5927\u6587\u4ef6\u5206\u53d1\u66f4\u91cd\u8981\u3002\u65b9\u6cd5\uff1a\u5bf9\u5927\u6587\u4ef6\u5206\u6bb5\u7f13\u5b58\u3001\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u7f13\u5b58\u56de\u6e90\u3002<\/li>\n<li><strong>TTFB\uff08Time To First Byte\uff09\u4e0e\u6574\u4f53\u5ef6\u8fdf<\/strong>\uff1a\u53d7\u8def\u7531\u9009\u62e9\u3001\u8fb9\u7f18\u6027\u80fd\u4e0e\u6e90\u7ad9\u54cd\u5e94\u5f71\u54cd\u3002\u4f18\u5316\uff1a\u7f29\u77ed\u63e1\u624b\uff08TLS session reuse\uff09\u3001\u4f7f\u7528 HTTP\/2\/3\u3001\u5730\u57df\u5316\u90e8\u7f72\uff08\u9999\u6e2f\/\u7f8e\u56fd\/\u65e5\u672c\/\u97e9\u56fd\/\u65b0\u52a0\u5761\uff09\u3002<\/li>\n<li><strong>\u6e90\u7ad9\u6d41\u91cf\u4e0e\u5e26\u5bbd\u6210\u672c<\/strong>\uff1a\u901a\u8fc7 Origin Shield \u4e0e\u66f4\u9ad8\u7684\u8fb9\u7f18\u547d\u4e2d\u7387\u964d\u4f4e\u3002<\/li>\n<\/ul>\n<h2>\u56db\u3001\u4f18\u52bf\u5bf9\u6bd4\u4e0e\u6743\u8861<\/h2>\n<h3>Anycast vs GeoDNS<\/h3>\n<ul>\n<li>Anycast \u63d0\u4f9b\u66f4\u5feb\u901f\u7684\u6545\u969c\u5207\u6362\u548c\u900f\u660e\u8def\u7531\uff0c\u4f46\u5bf9 BGP \u4e0e\u8fd0\u7ef4\u80fd\u529b\u8981\u6c42\u9ad8\uff1b<\/li>\n<li>GeoDNS \u63a7\u5236\u66f4\u7ec6\uff0c\u80fd\u57fa\u4e8e\u4e1a\u52a1\u7b56\u7565\uff08\u4f8b\u5982\u6cd5\u5f8b\u5408\u89c4\u3001\u6210\u672c\uff09\u505a\u5b9a\u5411\u8def\u7531\uff0c\u4f46\u5b58\u5728 DNS \u7f13\u5b58\u6c61\u67d3\u548c\u7cbe\u786e\u6027\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h3>\u957f TTL vs \u77ed TTL<\/h3>\n<ul>\n<li>\u957f TTL \u63d0\u9ad8\u547d\u4e2d\u7387\u4f46\u53ef\u80fd\u5bfc\u81f4\u5185\u5bb9\u9648\u65e7\uff1b\u77ed TTL \u4fdd\u8bc1\u65b0\u9c9c\u5ea6\u4f46\u589e\u52a0\u56de\u6e90\u538b\u529b\u3002\u53ef\u7ed3\u5408 stale-while-revalidate \u5b9e\u73b0\u201c\u5ef6\u5c55\u6027\u65b0\u9c9c\u5ea6\u201d\u3002<\/li>\n<\/ul>\n<h3>\u4e2d\u5fc3\u5316\u6e90\u7ad9 vs \u591a\u6e90\u90e8\u7f72<\/h3>\n<ul>\n<li>\u4e2d\u5fc3\u5316\u6e90\u7ad9\u8fd0\u7ef4\u7b80\u5355\u4f46\u5e26\u5bbd\u6210\u4e3a\u74f6\u9888\uff1b\u591a\u6e90\uff08\u5982\u5728\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u540c\u65f6\u90e8\u7f72\u6e90\uff09\u80fd\u63d0\u4f9b\u66f4\u4f4e\u8de8\u5883\u5ef6\u8fdf\u4e0e\u66f4\u9ad8\u5197\u4f59\uff0c\u4f46\u9700\u89e3\u51b3\u6570\u636e\u540c\u6b65\u4e0e\u4e00\u81f4\u6027\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h2>\u4e94\u3001\u9009\u8d2d\u4e0e\u90e8\u7f72\u5efa\u8bae<\/h2>\n<p>\u5728\u9009\u8d2d CDN \u670d\u52a1\u6216\u642d\u5efa\u81ea\u6709\u52a0\u901f\u4f53\u7cfb\u65f6\uff0c\u5e94\u57fa\u4e8e\u4ee5\u4e0b\u8003\u8651\uff1a<\/p>\n<ul>\n<li><strong>\u4e1a\u52a1\u8986\u76d6\u533a\u57df\uff1a<\/strong>\u82e5\u76ee\u6807\u7528\u6237\u96c6\u4e2d\u5728\u9999\u6e2f\u3001\u4e1c\u4e9a\u6216\u4e1c\u5357\u4e9a\uff0c\u53ef\u4f18\u5148\u8003\u8651\u9999\u6e2fVPS\u3001\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u65b0\u52a0\u5761\u670d\u52a1\u5668\u8282\u70b9\u7684\u8986\u76d6\uff1b\u9762\u5411\u5317\u7f8e\u7528\u6237\u5219\u9700\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u7f8e\u56fdVPS \u7684\u826f\u597d\u8282\u70b9\u3002<\/li>\n<li><strong>\u8def\u7531\u80fd\u529b\uff1a<\/strong>\u8bc4\u4f30\u662f\u5426\u652f\u6301 Anycast\u3001\u5b9e\u65f6\u6d4b\u91cf\u8def\u7531\u4ee5\u53ca\u5065\u5eb7\u68c0\u67e5\uff1b\u6ce8\u610f DNS TTL \u7b56\u7565\u4e0e\u56de\u6e90\u8def\u5f84\u3002<\/li>\n<li><strong>\u7f13\u5b58\u7b56\u7565\u4e0e\u53ef\u914d\u7f6e\u6027\uff1a<\/strong>\u662f\u5426\u652f\u6301\u81ea\u5b9a\u4e49\u7f13\u5b58\u952e\u3001Cache-Control \u6307\u4ee4\u3001\u9884\u53d6\/\u9884\u70ed\u63a5\u53e3\u3001stale-* \u7b56\u7565\u4ee5\u53ca\u5206\u5c42\u7f13\u5b58\uff08Origin Shield\uff09\u3002<\/li>\n<li><strong>\u534f\u8bae\u4e0e\u6027\u80fd\u7279\u6027\uff1a<\/strong>\u652f\u6301 HTTP\/2\u3001HTTP\/3\uff08QUIC\uff09\u3001Brotli\/Gzip \u538b\u7f29\u3001TLS \u52a0\u901f\u4e0e\u4f1a\u8bdd\u91cd\u7528\u5bf9\u771f\u5b9e\u611f\u53d7\u5f71\u54cd\u5f88\u5927\u3002<\/li>\n<li><strong>\u8fd0\u7ef4\u4e0e\u76d1\u63a7\uff1a<\/strong>\u5b9e\u65f6\u6307\u6807\uff08\u547d\u4e2d\u7387\u3001\u9519\u8bef\u7387\u3001TTFB\u3001\u56de\u6e90\u91cf\uff09\u4e0e\u65e5\u5fd7\u5bfc\u51fa\u5bf9\u4e8e\u6545\u969c\u5b9a\u4f4d\u4e0e\u4f18\u5316\u5fc5\u4e0d\u53ef\u5c11\u3002<\/li>\n<li><strong>\u5408\u89c4\u4e0e\u57df\u540d\u7ba1\u7406\uff1a<\/strong>\u7ed3\u5408\u57df\u540d\u6ce8\u518c\u4e0e\u7ba1\u7406\uff08\u4f8b\u5982\u5c06\u57df\u540d\u89e3\u6790\u7b56\u7565\u4e0e CDN \u914d\u5408\uff09\uff0c\u786e\u4fdd DNS \u6258\u7ba1\u3001\u8bc1\u4e66\u81ea\u52a8\u5316\uff08Let&#8217;s Encrypt\uff09\u4e0e\u57df\u540d\u6ce8\u518c\u6d41\u7a0b\u987a\u7545\u3002<\/li>\n<\/ul>\n<h2>\u516d\u3001\u5b9e\u6218\u4f18\u5316\u793a\u4f8b<\/h2>\n<p>\u4e3e\u4f8b\uff1a\u4e00\u4e2a\u9762\u5411\u4e9a\u592a\u4e0e\u5317\u7f8e\u7528\u6237\u7684\u7535\u5546\u7ad9\u70b9\uff0c\u90e8\u7f72\u5efa\u8bae\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u5728\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u9996\u5c14\u3001\u65b0\u52a0\u5761\u3001\u6d1b\u6749\u77f6\u90e8\u7f72\u8fb9\u7f18\u8282\u70b9\uff08\u53ef\u9009\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u4e3a\u6e90\u7ad9\uff09\uff0c\u4f7f\u7528 Anycast+\u57fa\u4e8e RTT \u7684\u63a2\u6d4b\u505a\u9996\u9009\u8def\u7531\uff1b<\/li>\n<li>\u9759\u6001\u8d44\u6e90\uff08\u56fe\u7247\u3001JS\u3001CSS\uff09\u8bbe\u7f6e\u957f TTL \u4e0e\u7248\u672c\u53f7\uff08cache-busting\uff09\uff0c\u5f00\u542f Brotli \u538b\u7f29\uff1b<\/li>\n<li>\u5bf9\u4fc3\u9500\u9875\u9762\u4f7f\u7528\u77ed TTL \u5e76\u914d\u5408 stale-while-revalidate\uff0c\u589e\u52a0\u7f13\u5b58\u9884\u70ed\u811a\u672c\u5728\u6d3b\u52a8\u524d\u63a8\u9001\u70ed\u70b9\u5185\u5bb9\u5230\u8fb9\u7f18\u8282\u70b9\uff1b<\/li>\n<li>\u4f7f\u7528\u5206\u7ea7\u7f13\u5b58\u4e0e Origin Shield \u4ee5\u964d\u4f4e\u6e90\u7ad9\u8d1f\u8f7d\uff0c\u540c\u65f6\u76d1\u63a7 Byte Hit Ratio \u4e0e Request Hit Ratio\uff0c\u5b9a\u671f\u5206\u6790\u70ed\u70b9\u5bf9\u8c61\u5e76\u8c03\u6574\u66ff\u6362\u7b56\u7565\uff08LRU-&gt;LFU \u6d4b\u8bd5\uff09\u3002<\/li>\n<\/ul>\n<h2>\u603b\u7ed3<\/h2>\n<p>CDN \u7684\u667a\u80fd\u8def\u7531\u4e0e\u7f13\u5b58\u8c03\u5ea6\u5e76\u4e0d\u662f\u5355\u4e00\u6280\u672f\u53ef\u4ee5\u8986\u76d6\u7684\u9886\u57df\uff0c\u800c\u662f\u8def\u7531\u7b97\u6cd5\u3001\u7f13\u5b58\u7b56\u7565\u3001\u534f\u8bae\u652f\u6301\u4e0e\u8fd0\u7ef4\u76d1\u63a7\u7684\u7cfb\u7edf\u5de5\u7a0b\u3002\u901a\u8fc7\u5408\u7406\u7ed3\u5408 Anycast\u3001GeoDNS\u3001\u5ef6\u8fdf\u9a71\u52a8\u8def\u7531\u3001\u5206\u7ea7\u7f13\u5b58\u3001\u9884\u53d6\u4e0e\u73b0\u4ee3\u7f51\u7edc\u534f\u8bae\uff08HTTP\/2\/3\u3001QUIC\u3001Brotli\uff09\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u5e76\u964d\u4f4e\u5e26\u5bbd\u4e0e\u56de\u6e90\u6210\u672c\u3002\u90e8\u7f72\u65f6\u5e94\u6839\u636e\u4e1a\u52a1\u5730\u57df\u5206\u5e03\uff08\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\u7b49\uff09\u4e0e\u5b9e\u9645\u8bbf\u95ee\u7279\u5f81\u6765\u9009\u62e9\u5408\u9002\u7684\u8282\u70b9\u548c\u7f13\u5b58\u7b56\u7565\uff0c\u540c\u65f6\u914d\u5408\u57df\u540d\u6ce8\u518c\u4e0e\u89e3\u6790\u7ba1\u7406\u4ee5\u4fdd\u8bc1\u6574\u4f53\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u4e0e\u53ef\u89c2\u6d4b\u6027\u3002<\/p>\n<p>\u5982\u679c\u4f60\u9700\u8981\u8fdb\u4e00\u6b65\u8bc4\u4f30\u8282\u70b9\u90e8\u7f72\u6216\u8d2d\u4e70\u670d\u52a1\u5668\u6765\u6784\u5efa\u9ad8\u6027\u80fd\u8fb9\u7f18\u4e0e\u6e90\u7ad9\uff0c\u53ef\u4ee5\u53c2\u8003 Server.HK \u7684\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u76f8\u5173\u6d77\u5916\u670d\u52a1\u5668\u4ea7\u54c1\uff1a<a href=\"https:\/\/server.hk\/\">Server.HK \u5b98\u7f51<\/a>\uff0c\u6216\u76f4\u63a5\u67e5\u770b\u5177\u4f53\u7684\u670d\u52a1\u5668\u65b9\u6848\uff1a<a href=\"https:\/\/server.hk\/server.php\">\u9999\u6e2f\u670d\u52a1\u5668\u4ea7\u54c1\u9875<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1 CDN \u667a\u80fd\u8def\u7531 \u4e0d\u4ec5\u80fd\u628a\u7528\u6237\u8bf7\u6c42\u5bfc\u5411\u6700\u4f18\u8282\u70b9\uff0c\u8fd8\u80fd\u914d\u5408\u7f13\u5b58\u8c03\u5ea6\u663e\u8457\u63d0\u5347\u6027\u80fd\u4e0e\u7f13\u5b58\u547d\u4e2d\u7387\u3002\u672c\u6587\u4e3a\u7ad9\u957f\u4e0e\u5f00\u53d1\u8005\u63d0\u4f9b\u5b9e\u6218\u7b56\u7565\u4e0e\u90e8\u7f72\u5efa\u8bae\uff0c\u52a9\u4f60\u5728\u9999\u6e2f\u3001\u7f8e\u56fd\u6216\u5176\u4ed6\u6d77\u5916\u8282\u70b9\u4e0a\u83b7\u5f97\u66f4\u5feb\u7684\u8bbf\u95ee\u548c\u66f4\u4f4e\u7684\u5e26\u5bbd\u6210\u672c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4928],"tags":[2840,4416,2854,4878,2141,2142,4877,3674],"class_list":{"0":"post-210398","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-4928","7":"tag-cdn","10":"tag-4878","11":"tag-2141","12":"tag-2142","13":"tag-4877","14":"tag-3674"},"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/210398","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=210398"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/210398\/revisions"}],"predecessor-version":[{"id":210399,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/210398\/revisions\/210399"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=210398"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=210398"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=210398"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}