{"id":210415,"date":"2025-10-29T14:00:45","date_gmt":"2025-10-29T06:00:45","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210415\/"},"modified":"2025-10-29T14:00:46","modified_gmt":"2025-10-29T06:00:46","slug":"cdn-398","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210415\/","title":{"rendered":"\u667a\u80fd\u5316CDN\u7f13\u5b58\u7b56\u7565\uff1a\u81ea\u52a8\u7ba1\u7406\u4e0e\u7cbe\u51c6\u8c03\u5ea6\u5b9e\u6218"},"content":{"rendered":"<p>\u5728\u5f53\u4eca\u4e92\u8054\u7f51\u5185\u5bb9\u5206\u53d1\u65e5\u76ca\u589e\u957f\u7684\u573a\u666f\u4e0b\uff0cCDN \u5df2\u4e0d\u4ec5\u4ec5\u662f\u9759\u6001\u6587\u4ef6\u7684\u201c\u88ab\u52a8\u7f13\u5b58\u5668\u201d\uff0c\u800c\u5411\u7740\u667a\u80fd\u5316\u3001\u81ea\u52a8\u5316\u65b9\u5411\u6f14\u8fdb\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u7406\u89e3\u5e76\u5b9e\u8df5\u4e00\u5957\u667a\u80fd\u5316\u7684 CDN 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\u91c7\u7528\u591a\u5c42\u7f13\u5b58\u67b6\u6784\uff1a\u8fb9\u7f18\u8282\u70b9\uff08Edge\uff09\u3001\u4e2d\u95f4\u5c42\/\u5171\u4eab\u7f13\u5b58\uff08Regional\/POP\uff09\u4e0e\u6e90\u7ad9\uff08Origin\uff09\u3002\u8def\u7531\u5c42\u7ed3\u5408\u5730\u7406\u4f4d\u7f6e\u3001\u7f51\u7edc\u5ef6\u8fdf\u3001\u8282\u70b9\u8d1f\u8f7d\u6765\u51b3\u5b9a\u8bf7\u6c42\u7684\u8f6c\u53d1\u8def\u5f84\u3002\u5e38\u7528\u7b97\u6cd5\u5305\u62ec\u57fa\u4e8e GeoIP \u7684\u6700\u8fd1\u8282\u70b9\u9009\u62e9\u3001\u57fa\u4e8e\u5b9e\u65f6 RTT \u7684\u52a8\u6001\u63a2\u6d4b\u4ee5\u53ca\u57fa\u4e8e\u4e00\u81f4\u6027\u54c8\u5e0c\u7684\u4f1a\u8bdd\u4eb2\u548c\u6027\u8c03\u5ea6\u3002<\/p>\n<h3>\u7f13\u5b58\u63a7\u5236\u4e0e HTTP \u8bed\u4e49\u5229\u7528<\/h3>\n<p>\u5b9e\u73b0\u667a\u80fd\u5316\u7684\u7b2c\u4e00\u6b65\u662f\u5145\u5206\u5229\u7528 HTTP \u7f13\u5b58\u5934\uff1a<\/p>\n<ul>\n<li><strong>Cache-Control<\/strong>\uff1amax-age\u3001s-maxage\u3001public\/private\u3001no-cache \u7b49\u7ec4\u5408\u7528\u4e8e\u533a\u5206\u5ba2\u6237\u7aef\u7f13\u5b58\u4e0e\u4e2d\u95f4\u7f13\u5b58\u7b56\u7565\u3002<\/li>\n<li><strong>ETag \u4e0e Last-Modified<\/strong>\uff1a\u7528\u4e8e\u534f\u5546\u7f13\u5b58\uff08conditional requests\uff09\uff0c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u4e3b\u4f53\u4f20\u8f93\u3002<\/li>\n<li><strong>Stale-While-Revalidate \/ Stale-If-Error<\/strong>\uff1a\u63d0\u9ad8\u7528\u6237\u53ef\u7528\u6027\uff0c\u5141\u8bb8\u8fb9\u7f18\u8fd4\u56de\u7a0d\u8fc7\u671f\u5185\u5bb9\u540c\u65f6\u5f02\u6b65\u5237\u65b0\u7f13\u5b58\u3002<\/li>\n<\/ul>\n<h3>\u81ea\u52a8\u5316\u5931\u6548\u4e0e\u9884\u53d6\uff08Purge \/ Prefetch \/ Cache Warming\uff09<\/h3>\n<p>\u624b\u52a8 purge \u96be\u4ee5\u89c4\u6a21\u5316\uff0c\u667a\u80fd\u5316\u7cfb\u7edf\u4f1a\u57fa\u4e8e\u5185\u5bb9\u53d8\u66f4\u89e6\u53d1\u5668\uff08\u5982 CMS webhook\u3001\u6587\u4ef6\u7cfb\u7edf\u4e8b\u4ef6\uff09\u81ea\u52a8\u4e0b\u53d1\u5220\u9664\u6216\u66f4\u65b0\u547d\u4ee4\uff1b\u5bf9\u4e8e\u70ed\u70b9\u5185\u5bb9\uff0c\u7cfb\u7edf\u53ef\u6267\u884c\u9884\u53d6\uff08prefetch\uff09\u6216\u201c\u7f13\u5b58\u9884\u70ed\u201d\uff08warming\uff09\u4ee5\u907f\u514d\u51b7\u542f\u52a8\u5ef6\u8fdf\u3002\u9884\u53d6\u7b56\u7565\u5e38\u7ed3\u5408\u8bbf\u95ee\u9891\u7387\u9608\u503c\u4e0e\u9884\u6d4b\u6a21\u578b\u51b3\u5b9a\u662f\u5426\u62c9\u53d6\u5230\u8fb9\u7f18\u8282\u70b9\u3002<\/p>\n<h3>\u6570\u636e\u9a71\u52a8\u7684\u9884\u6d4b\u4e0e\u673a\u5668\u5b66\u4e60\u8c03\u5ea6<\/h3>\n<p>\u901a\u8fc7\u91c7\u96c6\u8bf7\u6c42\u65e5\u5fd7\u3001\u5e26\u5bbd\u3001\u547d\u4e2d\u7387\u3001\u54cd\u5e94\u65f6\u95f4\u7b49\u6307\u6807\uff0c\u6784\u5efa\u8bbf\u95ee\u9884\u6d4b\u6a21\u578b\uff08\u65f6\u5e8f\u6a21\u578b\u3001\u56de\u5f52\u6216\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b\uff09\u53ef\u5b9e\u73b0\uff1a<\/p>\n<ul>\n<li>\u52a8\u6001\u8c03\u6574 TTL\uff1a\u5bf9\u9ad8\u9891\u66f4\u65b0\u5185\u5bb9\u7f29\u77ed TTL\u3001\u5bf9\u7a33\u5b9a\u5185\u5bb9\u5ef6\u957f TTL\u3002<\/li>\n<li>\u70ed\u70b9\u68c0\u6d4b\u4e0e\u81ea\u52a8\u590d\u5236\uff1a\u5728\u591a\u4e2a POP \u4e4b\u95f4\u590d\u5236\u70ed\u95e8\u5bf9\u8c61\u4ee5\u5206\u6563\u8d1f\u8f7d\u3002<\/li>\n<li>\u5f02\u5e38\u68c0\u6d4b\uff1a\u8bc6\u522b\u7f13\u5b58\u51fb\u7a7f\u3001\u7f13\u5b58\u96ea\u5d29\u7b49\u98ce\u9669\u5e76\u89e6\u53d1\u9650\u6d41\u6216\u964d\u7ea7\u7b56\u7565\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u5206\u533a\u4e0e\u591a\u79df\u6237\u9694\u79bb<\/h3>\n<p>\u4e3a\u907f\u514d\u5355\u4e00\u5927\u5bf9\u8c61\u6216\u79df\u6237\u5f71\u54cd\u6574\u4f53\u7f13\u5b58\u6027\u80fd\uff0c\u91c7\u7528\u7f13\u5b58\u5206\u533a\uff08sharding\uff09\u3001LRU\/LFU \u7ec4\u5408\u66ff\u6362\u7b56\u7565\u53ca\u914d\u989d\u9650\u989d\uff0c\u786e\u4fdd\u516c\u5e73\u6027\u548c\u7a33\u5b9a\u6027\u3002\u5bf9\u4e8e\u4f01\u4e1a\u591a\u7ad9\u70b9\u90e8\u7f72\uff08\u4f8b\u5982\u540c\u65f6\u4f7f\u7528\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS \u6216\u6d77\u5916\u670d\u52a1\u5668\u7b49\u73af\u5883\uff09\uff0c\u5e94\u652f\u6301\u6309\u9879\u76ee\u6216\u57df\u540d\u5206\u7ec4\u7ba1\u7406\u7f13\u5b58\u7b56\u7565\u3002<\/p>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u6218\u6280\u5de7<\/h2>\n<h3>\u9ad8\u5e76\u53d1\u9759\u6001\u5185\u5bb9\u5206\u53d1<\/h3>\n<p>\u5bf9\u4e8e\u9759\u6001\u8d44\u6e90\uff08JS\/CSS\/\u56fe\u7247\uff09\uff0c\u5efa\u8bae\u91c7\u7528\u957f TTL \u4e0e\u7248\u672c\u5316 URL \u7b56\u7565\uff0c\u914d\u5408\u8fb9\u7f18\u7f13\u5b58\u9884\u53d6\u3002\u5728\u8de8\u5883\u8bbf\u95ee\u573a\u666f\uff08\u5982\u4ece\u5927\u9646\u8bbf\u95ee\u9999\u6e2f\u670d\u52a1\u5668\u6216\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff09\uff0c\u5e94\u4f18\u5148\u5c06\u9759\u6001\u8d44\u6e90\u90e8\u7f72\u5230\u79bb\u7528\u6237\u66f4\u8fd1\u7684 POP\uff0c\u5982\u9999\u6e2f\u6216\u65b0\u52a0\u5761\u8282\u70b9\uff0c\u4ee5\u964d\u4f4e\u5ef6\u8fdf\u3002<\/p>\n<h3>\u52a8\u6001\u5185\u5bb9\u4e0e\u534a\u9759\u6001\u9875\u9762<\/h3>\n<p>\u5bf9\u9700\u8981\u4e2a\u6027\u5316\u6e32\u67d3\u7684\u9875\u9762\uff0c\u53ef\u7ed3\u5408\u8fb9\u7f18\u6e32\u67d3\uff08Edge Compute\uff09\u4e0e\u7f13\u5b58\u7247\u6bb5\uff08Edge Side Includes, ESI\uff09\u6280\u672f\u7f13\u5b58\u4e0d\u53d8\u7247\u6bb5\uff0c\u52a8\u6001\u7247\u6bb5\u901a\u8fc7 API \u62c9\u53d6\u3002\u5bf9\u4e8e\u7535\u5546\u6216\u91d1\u878d\u7c7b\u9875\u9762\uff0c\u4f7f\u7528\u77ed TTL + stale-while-revalidate \u80fd\u5728\u4fdd\u8bc1\u4e00\u81f4\u6027\u7684\u540c\u65f6\u51cf\u5c11\u7528\u6237\u7b49\u5f85\u3002<\/p>\n<h3>\u9891\u7e41\u66f4\u65b0\u7684\u5185\u5bb9\uff08\u65b0\u95fb\u3001\u80a1\u5e02\uff09<\/h3>\n<p>\u6b64\u7c7b\u573a\u666f\u5e94\u7ed3\u5408\u63a8\u9001\u5f0f\u66f4\u65b0\uff08origin push\uff09\u6216\u57fa\u4e8e\u4e8b\u4ef6\u7684\u81ea\u52a8 purge\u3002\u5229\u7528\u5dee\u5f02\u5316 TTL\uff08\u70ed\u70b9\u77ed\u3001\u6b21\u70ed\u70b9\u4e2d\u3001\u51b7\u95e8\u957f\uff09\u4ee5\u53ca\u6d41\u91cf\u52a0\u6743\u8def\u7531\uff0c\u786e\u4fdd\u5173\u952e\u65f6\u523b\uff08\u5982\u7a81\u53d1\u65b0\u95fb\uff09\u7cfb\u7edf\u4e0d\u4f1a\u56e0\u4e3a\u6e90\u7ad9\u538b\u529b\u800c\u5d29\u6e83\u3002<\/p>\n<h3>\u591a\u5730\u57df\u5bb9\u707e\u4e0e\u6d41\u91cf\u8c03\u5ea6<\/h3>\n<p>\u5bf9\u4e8e\u9700\u8981\u5168\u7403\u8986\u76d6\u7684\u7ad9\u70b9\uff08\u53ef\u80fd\u540c\u65f6\u4f7f\u7528\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u9999\u6e2f\u670d\u52a1\u5668\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u7b49\uff09\uff0c\u5efa\u8bae\u542f\u7528\u6e90\u7ad9\u7ec4\u4e0e\u5065\u5eb7\u68c0\u67e5\uff0c\u7ed3\u5408\u667a\u80fd\u6d41\u91cf\u8c03\u5ea6\uff08\u57fa\u4e8e\u5730\u57df\u3001\u94fe\u8def\u8d28\u91cf\u4e0e\u6210\u672c\uff09\u5b9e\u73b0\u5c31\u8fd1\u8bbf\u95ee\u4e0e\u5bb9\u707e\u5207\u6362\u3002<\/p>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u667a\u80fd\u5316 vs 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