{"id":37002,"date":"2026-11-05T16:04:34","date_gmt":"2026-11-05T08:04:34","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/cdn-cache-ttl-vs-dns-ttl-on-japan-servers\/"},"modified":"2026-11-05T16:20:04","modified_gmt":"2026-11-05T08:20:04","slug":"cdn-cache-ttl-vs-dns-ttl-on-japan-servers","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/cdn-cache-ttl-vs-dns-ttl-on-japan-servers\/","title":{"rendered":"CDN \u7f13\u5b58 TTL \u4e0e DNS TTL \u5728\u65e5\u672c\u670d\u52a1\u5668\u4e0a\u7684\u5dee\u5f02"},"content":{"rendered":"<p>\n    \u5982\u679c\u4f60\u7684\u65e5\u5e38\u5de5\u4f5c\u5c31\u662f\u76ef\u5ef6\u8fdf\u66f2\u7ebf\u3001\u770b\u5404\u79cd\u5934\u90e8\u5b57\u6bb5\uff0c\u90a3\u4f60\u5f88\u53ef\u80fd\u5df2\u7ecf\u548c TTL \u6253\u8fc7\u65e0\u6570\u6b21\u4ea4\u9053\uff0c\u5374\u4ecd\u7136\u80fd\u5728\u751f\u4ea7\u73af\u5883\u91cc\u770b\u5230\u5b83\u88ab\u5404\u79cd\u8bef\u7528\u3002\u672c\u6587\u5199\u7ed9\u5728<br \/>\n    <a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/tokyo\/cn2\/\" target=\"_blank\">\u65e5\u672c\u670d\u52a1\u5668<\/a><br \/>\n    \u4e0a\u8dd1\u4e1a\u52a1\u7684\u5de5\u7a0b\u5e08\uff0c\u5e0c\u671b\u5e2e\u4f60\u7cbe\u51c6\u638c\u63a7\u6bd4\u7279\u5982\u4f55\u5728\u7f51\u7edc\u4e2d\u6d41\u52a8\u3001\u53c8\u5728\u4ec0\u4e48\u4f4d\u7f6e\u88ab\u7f13\u5b58\u3002\u6211\u4eec\u4f1a\u7ed3\u5408\u771f\u5b9e\u4e16\u754c\u4e2d CDN \u7f13\u5b58\u548c DNS \u89e3\u6790\u5668\u7684\u884c\u4e3a\uff0c\u518d\u628a\u5b83\u4eec\u548c\u53ef\u89c2\u6d4b\u6027\u3001\u6545\u969c\u5207\u6362\u4ee5\u53ca SEO \u5173\u8054\u8d77\u6765\u3002\u5bf9\u641c\u7d22\u5f15\u64ce\u4e5f\u597d\uff0c\u5bf9\u4eba\u7c7b\u8bfb\u8005\u4e5f\u597d\uff0c\u8fd9\u7bc7\u6587\u7ae0\u7684\u7126\u70b9\u90fd\u975e\u5e38\u660e\u786e\uff1aCDN \u7f13\u5b58 TTL\u3001DNS TTL \u5dee\u5f02\u3001\u65e5\u672c\u670d\u52a1\u5668\u79df\u7528\uff0c\u4ee5\u53ca\u8fd9\u4e9b\u7ec4\u4ef6\u5728\u9ad8\u8d1f\u8f7d\u4e0b\u662f\u5982\u4f55\u76f8\u4e92\u4f5c\u7528\u7684\u3002\n  <\/p>\n<h2><strong>1. \u5fc3\u667a\u6a21\u578b\uff1a\u5f04\u6e05 \u201ctime to live\u201d \u7684\u771f\u6b63\u542b\u4e49<\/strong><\/h2>\n<p>\n    \u5728\u5f00\u59cb\u533a\u5206 CDN \u5c42\u548c DNS \u89e3\u6790\u5c42\u4e4b\u524d\uff0c\u5148\u7edf\u4e00\u4e00\u4e0b\u5bf9 TTL \u7684\u5fc3\u667a\u6a21\u578b\u4f1a\u66f4\u6709\u5e2e\u52a9\u3002\u5728\u5927\u591a\u6570 Web \u6280\u672f\u6808\u4e2d\uff0cTTL \u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u4ee5\u79d2\u4e3a\u5355\u4f4d\u7684\u6574\u6570\uff0c\u5b83\u544a\u8bc9\u67d0\u4e2a\u7f13\u5b58\u7ec4\u4ef6\uff1a\u4e00\u6bb5\u7279\u5b9a\u7684\u4fe1\u606f\u5728\u591a\u957f\u65f6\u95f4\u5185\u53ef\u4ee5\u88ab\u89c6\u4e3a\u201c\u65b0\u9c9c\u201d\u3002\u4e00\u65e6\u5012\u8ba1\u65f6\u5f52\u96f6\uff0c\u7f13\u5b58\u5c31\u4f1a\u628a\u8fd9\u6761\u8bb0\u5f55\u89c6\u4e3a\u8fc7\u671f\uff0c\u5fc5\u987b\u91cd\u65b0\u9a8c\u8bc1\uff08revalidate\uff09\u6216\u5411\u4e0a\u6e38\u91cd\u65b0\u83b7\u53d6\u6570\u636e\u3002\n  <\/p>\n<ul>\n<li>\n      \u5728 HTTP \u7f13\u5b58\u4e2d\uff0cTTL \u901a\u5e38\u7531\u8bf8\u5982 <code>Cache-Control: max-age=3600<\/code> \u8fd9\u6837\u7684\u6307\u4ee4\u63a8\u5bfc\u51fa\u6765\uff0c\u6216\u8005\u6765\u81ea\u4e00\u4e2a\u663e\u5f0f\u7684\u8fc7\u671f\u65f6\u95f4\u6233\u3002\n    <\/li>\n<li>\n      \u5728 DNS \u4e2d\uff0cTTL \u662f\u6bcf\u6761\u8d44\u6e90\u8bb0\u5f55\u4e0a\u7684\u4e00\u4e2a\u5b57\u6bb5\uff0c\u7528\u6765\u544a\u8bc9\u9012\u5f52\u89e3\u6790\u5668\uff1a\u5b83\u53ef\u4ee5\u5728\u672c\u5730\u5185\u5b58\u4e2d\u590d\u7528\u8fd9\u6761\u6620\u5c04\u591a\u957f\u65f6\u95f4\uff0c\u7136\u540e\u624d\u9700\u8981\u518d\u6b21\u53bb\u6743\u5a01 DNS \u670d\u52a1\u5668\u67e5\u8be2\u3002\n    <\/li>\n<li>\n      \u5728\u62a5\u6587\u5c42\u9762\uff0c\u4e00\u4e9b\u534f\u8bae\u4e5f\u643a\u5e26\u57fa\u4e8e\u201c\u8df3\u6570\u201d\u7684 TTL\uff0c\u4f46\u5bf9 Web \u8fd0\u7ef4\u6765\u8bf4\uff0c\u6211\u4eec\u4e3b\u8981\u5173\u5fc3\u7684\u662f\u201c\u7f13\u5b58\u65b0\u9c9c\u5ea6\u201d\uff0c\u800c\u4e0d\u662f\u8def\u7531\u73af\u8def\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u5bf9\u5de5\u7a0b\u5e08\u6765\u8bf4\uff0c\u66f4\u5173\u952e\u7684\u7ea6\u675f\u5728\u4e8e\uff1a\u4ece\u6d4f\u89c8\u5668\u5230\u65e5\u672c\u673a\u623f\u7684\u8def\u5f84\u4e0a\uff0c\u53ef\u4ee5\u540c\u65f6\u5b58\u5728\u591a\u4e2a\u5404\u81ea\u53d7 TTL \u63a7\u5236\u7684\u5c42\u7ea7\uff1a\u6d4f\u89c8\u5668\u7f13\u5b58\u3001CDN \u8fb9\u7f18\u8282\u70b9\u3001ISP \u89e3\u6790\u5668\u3001\u4f01\u4e1a\u5185\u90e8\u7684 DNS \u8f6c\u53d1\u5668\u7b49\u7b49\u3002\u4f60\u6539\u52a8\u5176\u4e2d\u67d0\u4e00\u5c42\u7684 TTL\uff0c\u5e76\u4e0d\u4f1a\u201c\u9b54\u6cd5\u822c\u5730\u201d\u6539\u5199\u5176\u4ed6\u5c42\u7684\u884c\u4e3a\u3002\n  <\/p>\n<h2><strong>2. CDN \u7f13\u5b58 TTL\uff1a\u4f60\u5185\u5bb9\u5728\u8fb9\u7f18\u8282\u70b9\u4e0a\u7684\u526f\u672c<\/strong><\/h2>\n<p>\n    CDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u4f1a\u5728\u8fb9\u7f18\u8282\u70b9\u7f13\u5b58\u4f60\u7684\u54cd\u5e94\u526f\u672c\u3002\u5bf9\u4e00\u4e2a\u9762\u5411\u65e5\u672c\u7528\u6237\u7684\u9879\u76ee\u6765\u8bf4\uff0c\u8fd9\u4e9b\u8fb9\u7f18\u8282\u70b9\u7684 PoP \u53ef\u80fd\u4f4d\u4e8e\u4e1c\u4eac\u3001\u5927\u962a\u4ee5\u53ca\u5468\u8fb9\u7684\u4e9a\u6d32\u67a2\u7ebd\u57ce\u5e02\u3002CDN \u7f13\u5b58 TTL \u51b3\u5b9a\u4e86\u6bcf\u4e00\u4e2a\u8fb9\u7f18\u8282\u70b9\u53ef\u4ee5\u5728\u591a\u957f\u65f6\u95f4\u5185\u76f4\u63a5\u4f7f\u7528\u672c\u5730\u7f13\u5b58\u5bf9\u8c61\uff0c\u800c\u4e0d\u5fc5\u56de\u6e90\u5230\u4f60\u5728\u65e5\u672c\u673a\u67dc\u4e2d\u7684 origin\u3002\n  <\/p>\n<p>\n    \u5728\u5927\u591a\u6570 CDN \u4e2d\uff0c\u6709\u6548\u7684\u7f13\u5b58\u751f\u547d\u5468\u671f\u662f\u201c\u6e90\u7ad9\u5934\u90e8 + \u5e73\u53f0\u89c4\u5219\u201d\u5171\u540c\u4f5c\u7528\u7684\u7ed3\u679c\uff1a\n  <\/p>\n<ul>\n<li>\n      <code>Cache-Control: max-age=N<\/code> \u51b3\u5b9a\u4e86\u54cd\u5e94\u5728\u5305\u62ec\u6d4f\u89c8\u5668\u5728\u5185\u7684\u6240\u6709\u7f13\u5b58\u4e2d\u53ef\u4ee5\u505c\u7559\u591a\u957f\u65f6\u95f4\u3002\n    <\/li>\n<li>\n      <code>Cache-Control: s-maxage=N<\/code> \u53ef\u4ee5\u4e13\u95e8\u4e3a\u201c\u5171\u4eab\u7f13\u5b58\u201d\uff08\u4f8b\u5982 CDN\uff09\u8986\u76d6\u4e0a\u8ff0\u6570\u503c\uff0c\u540c\u65f6\u7ed9\u672c\u5730\u5ba2\u6237\u7aef\u4fdd\u7559\u4e0d\u540c\u7684\u7b56\u7565\u3002\n    <\/li>\n<li>\n      CDN \u540e\u53f0\u63a7\u5236\u53f0\u901a\u5e38\u8fd8\u6709\u81ea\u5df1\u7684\u6700\u5c0f\u3001\u9ed8\u8ba4\u548c\u6700\u5927 TTL \u9650\u5236\uff0c\u7528\u6765\u5bf9\u8fd9\u4e9b\u5934\u90e8\u8bbe\u4e00\u4e2a\u4e0a\u9650\u548c\u4e0b\u9650\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u4ece\u8fb9\u7f18\u8282\u70b9\u7684\u89c6\u89d2\u770b\uff0cTTL \u7684\u4e3b\u8981\u76ee\u6807\u662f\u51cf\u5c11\u56de\u6e90\u8bf7\u6c42\u7684\u6b21\u6570\uff0c\u540c\u65f6\u4fdd\u8bc1\u5185\u5bb9\u201c\u8db3\u591f\u65b0\u9c9c\u201d\u3002\u5e26\u6307\u7eb9\u7684 JavaScript \u5305\uff08\u4f8b\u5982\u901a\u8fc7\u6587\u4ef6\u540d\u643a\u5e26 hash\uff09\u901a\u5e38\u53ef\u4ee5\u5bb9\u5fcd\u5f88\u957f\u7684 TTL\uff0c\u56e0\u4e3a\u6bcf\u6b21\u53d1\u7248\u90fd\u4f1a\u751f\u6210\u5168\u65b0\u7684 URL\u3002\u800c\u6309\u7167\u7528\u6237 ID \u7ef4\u5ea6\u7f13\u5b58\u7684 API \u54cd\u5e94\uff0c\u5f80\u5f80\u8981\u4e48\u5b8c\u5168\u8df3\u8fc7\u7f13\u5b58\uff0c\u8981\u4e48\u53ea\u5728\u6781\u77ed\u65f6\u95f4\u7a97\u53e3\u5185\u7f13\u5b58\u3002\n  <\/p>\n<h2><strong>3. DNS TTL\uff1a\u57df\u540d\u6700\u7ec8\u6307\u5411\u54ea\u91cc<\/strong><\/h2>\n<p>\n    DNS \u7f13\u5b58\u4f4d\u4e8e\u5b8c\u5168\u4e0d\u540c\u7684\u67b6\u6784\u5c42\u3002DNS \u89e3\u6790\u5668\u5e76\u4e0d\u4f1a\u7f13\u5b58 HTML \u6216 JSON\uff0c\u800c\u662f\u7f13\u5b58\u8bf8\u5982\u201c<code>api.example.jp<\/code> \u2192 IPv4 \u5730\u5740\u201d\u6216\u8005\u201c<code>static.example.jp<\/code> \u2192 CDN \u4e3b\u673a\u540d\u201d\u8fd9\u6837\u7684\u6620\u5c04\u5173\u7cfb\u3002\u6bcf\u6761\u6620\u5c04\u90fd\u4f1a\u5e26\u4e00\u4e2a TTL\uff0c\u6307\u660e\u89e3\u6790\u5668\u53ef\u4ee5\u5728\u591a\u957f\u65f6\u95f4\u5185\u590d\u7528\u8fd9\u6761\u8bb0\u5f55\u3002\n  <\/p>\n<p>\n    \u751f\u547d\u5468\u671f\u5927\u81f4\u5982\u4e0b\uff1a\n  <\/p>\n<ol>\n<li>\n      \u5ba2\u6237\u7aef\u5411\u81ea\u5df1\u914d\u7f6e\u597d\u7684\u89e3\u6790\u5668\u53d1\u8d77\u67e5\u8be2\uff08\u901a\u5e38\u662f ISP \u63d0\u4f9b\u7684\u89e3\u6790\u5668\uff0c\u6216\u516c\u5171 DNS \u670d\u52a1\uff09\u3002\n    <\/li>\n<li>\n      \u5982\u679c\u89e3\u6790\u5668\u7684\u7f13\u5b58\u91cc\u5df2\u7ecf\u6709\u8fd9\u6761\u8bb0\u5f55\uff0c\u5e76\u4e14 TTL \u5c1a\u672a\u8fc7\u671f\uff0c\u5b83\u5c31\u76f4\u63a5\u4ece\u5185\u5b58\u4e2d\u8fd4\u56de\u7ed3\u679c\u3002\n    <\/li>\n<li>\n      \u5982\u679c\u672c\u5730\u7f13\u5b58\u4e3a\u7a7a\u6216\u5df2\u8fc7\u671f\uff0c\u89e3\u6790\u5668\u5c31\u4f1a\u6309\u7167 DNS \u5c42\u7ea7\u9010\u7ea7\u5411\u4e0a\u67e5\u627e\uff0c\u4ece\u6743\u5a01 DNS \u670d\u52a1\u5668\u53d6\u56de\u8bb0\u5f55\uff0c\u5e76\u8fde\u540c TTL \u4e00\u8d77\u7f13\u5b58\u4e0b\u6765\u3002\n    <\/li>\n<li>\n      \u5728\u8fd9\u4e2a TTL \u7684\u6709\u6548\u671f\u5185\uff0c\u540e\u7eed\u5bf9\u540c\u4e00\u8bb0\u5f55\u7684\u67e5\u8be2\u90fd\u4f1a\u547d\u4e2d\u7f13\u5b58\uff0c\u5373\u4fbf\u6743\u5a01\u670d\u52a1\u5668\u4e0a\u7684\u6570\u636e\u5df2\u7ecf\u53d1\u751f\u53d8\u5316\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u5b9e\u9645\u6548\u679c\u662f\uff1a\u53ea\u8981\u67d0\u4e2a\u64cd\u4f5c\u6d89\u53ca\u201c\u628a\u6d41\u91cf\u4ece\u67d0\u4e2a\u65e5\u672c\u8282\u70b9\u8fc1\u8d70\u6216\u8fc1\u56de\u201d\uff0c\u771f\u6b63\u7684\u6536\u655b\u65f6\u95f4\u5c31\u88ab\u201c\u91ce\u5916\u73af\u5883\u4e2d\u6700\u957f\u7684\u7f13\u5b58 TTL\u201d\u6240\u7ed1\u6b7b\u3002\u4f60\u5728\u6743\u5a01 DNS \u4e0a\u8c03\u4f4e TTL \u53ea\u4f1a\u5f71\u54cd\u672a\u6765\u7684\u65b0\u89e3\u6790\u8bf7\u6c42\uff1b\u5df2\u7ecf\u6309\u66f4\u9ad8 TTL \u7f13\u5b58\u4e0b\u6765\u7684\u8001\u8bb0\u5f55\uff0c\u5e76\u4e0d\u4f1a\u88ab\u77ac\u95f4\u5931\u6548\u3002\n  <\/p>\n<h2><strong>4. CDN \u7f13\u5b58 TTL vs DNS TTL\uff1a\u771f\u6b63\u7684\u5dee\u522b\u5728\u54ea\u91cc<\/strong><\/h2>\n<p>\n    \u5f88\u591a\u8fd0\u7ef4\u624b\u518c\u4f1a\u628a CDN \u7f13\u5b58 TTL \u548c DNS TTL \u4e00\u80a1\u8111\u5f52\u5165\u201c\u4f20\u64ad\u5ef6\u8fdf\u201d\u8fd9\u4e00\u7c7b\uff0c\u8fd9\u662f\u6709\u98ce\u9669\u7684\u3002\u8fd9\u4e24\u79cd\u8ba1\u65f6\u5668\u5206\u522b\u5c5e\u4e8e\u622a\u7136\u4e0d\u540c\u7684\u7cfb\u7edf\uff0c\u5b83\u4eec\u6709\u7740\u5404\u81ea\u72ec\u7acb\u7684\u72b6\u6001\u3001\u6545\u969c\u6a21\u5f0f\u548c\u8fd0\u7ef4\u5de5\u5177\u3002\u6e05\u6670\u5730\u628a\u4e24\u8005\u533a\u5206\u5f00\uff0c\u53ef\u4ee5\u5728\u4e8b\u6545\u53d1\u751f\u65f6\u51cf\u5c11\u5927\u91cf\u6392\u67e5\u65f6\u95f4\u3002\n  <\/p>\n<ul>\n<li>\n      <strong>\u63a7\u5236\u5e73\u9762 vs \u6570\u636e\u5e73\u9762\uff1a<\/strong>DNS \u51b3\u5b9a\u5ba2\u6237\u7aef\u8981\u628a\u6d41\u91cf\u53d1\u5230\u201c\u54ea\u91cc\u201d\uff1bCDN \u7f13\u5b58\u5219\u51b3\u5b9a\u5728 TCP\/TLS \u4f1a\u8bdd\u5efa\u7acb\u4e4b\u540e\uff0c\u5ba2\u6237\u7aef\u5b9e\u9645\u6536\u5230\u201c\u4ec0\u4e48\u201d\u5185\u5bb9\u3002\n    <\/li>\n<li>\n      <strong>\u5f71\u54cd\u8303\u56f4\uff1a<\/strong>\u8c03\u6574 DNS TTL \u4e3b\u8981\u4f1a\u5f71\u54cd\u8def\u7531\u8def\u5f84\u3001\u8fc1\u79fb\u65f6\u95f4\u8868\u4ee5\u53ca\u6545\u969c\u7684\u6ce2\u53ca\u8303\u56f4\uff1b\u8c03\u6574 CDN TTL \u5219\u4e3b\u8981\u5f71\u54cd\u5185\u5bb9\u53ef\u80fd\u53d8\u5f97\u591a\u65e7\uff0c\u4ee5\u53ca\u65e5\u672c origin \u9700\u8981\u591a\u9891\u7e41\u5730\u4eb2\u81ea\u8fd4\u56de\u5b8c\u6574\u54cd\u5e94\u3002\n    <\/li>\n<li>\n      <strong>\u5931\u6548\u4e0e\u6e05\u7f13\u5b58\u5de5\u5177\uff1a<\/strong>CDN \u5e73\u53f0\u901a\u5e38\u63d0\u4f9b\u7f13\u5b58\u6e05\u7406\uff08cache purge\uff09API \u6216\u63a7\u5236\u53f0\u6309\u94ae\uff0c\u8ba9\u4f60\u65e0\u9700\u7b49\u5f85 TTL \u81ea\u7136\u5230\u671f\u5c31\u80fd\u624b\u52a8\u79fb\u9664\u6307\u5b9a\u8def\u5f84\u3002\u800c\u4f20\u7edf\u7684 DNS \u89e3\u6790\u5668\u5e76\u6ca1\u6709\u6807\u51c6\u5316\u7684\u201c\u8fdc\u7a0b\u6e05\u7f13\u5b58\u201d\u673a\u5236\uff0c\u4f60\u53ea\u80fd\u4f9d\u8d56 TTL \u81ea\u7136\u8fc7\u671f\u4ee5\u53ca\u89e3\u6790\u5668\u81ea\u8eab\u7684\u884c\u4e3a\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u76f4\u63a5\u7684\u542b\u4e49\u662f\uff1a\u5f53\u7528\u6237\u53cd\u9988\u201c\u6211\u8fd9\u8fb9\u8fd8\u5728\u770b\u5230\u65e7\u7248\u672c\u201d\u7684\u65f6\u5019\uff0c\u4f60\u5e94\u8be5\u7b2c\u4e00\u65f6\u95f4\u5224\u65ad\u5b83\u5230\u5e95\u662f\u201c\u89e3\u6790\u95ee\u9898\u201d\u8fd8\u662f\u201c\u5185\u5bb9\u7f13\u5b58\u95ee\u9898\u201d\u3002\u9884\u671f IP \u5730\u5740\u548c traceroute \u7ed3\u679c\u5bf9\u4e0d\u4e0a\uff0c\u591a\u534a\u662f DNS TTL \u7684\u9505\uff1bIP \u5730\u5740\u5df2\u7ecf\u5bf9\u4e86\uff0c\u4f46 CSS \u6216\u9875\u9762\u7ed3\u6784\u4ecd\u7136\u65e7\uff0c\u90a3\u5c31\u66f4\u50cf\u662f CDN \u7f13\u5b58 TTL \u5bfc\u81f4\u7684\u9648\u65e7\u5185\u5bb9\u3002\n  <\/p>\n<h2><strong>5. \u5178\u578b\u7684\u65e5\u672c\u573a\u666f TTL \u914d\u7f6e\u6a21\u5f0f<\/strong><\/h2>\n<p>\n    \u5bf9\u4e8e\u4e1a\u52a1\u4e3b\u8981\u90e8\u7f72\u5728\u65e5\u672c\u673a\u623f\u7684\u573a\u666f\uff0c\u7f51\u7edc\u5730\u7406\u5206\u5e03\u548c\u7528\u6237\u6765\u6e90\u4f1a\u76f4\u63a5\u5f71\u54cd\u5408\u7406\u7684 TTL \u533a\u95f4\u3002\u901a\u5f80\u5468\u8fb9\u4e9a\u6d32\u5e02\u573a\u7684\u7f51\u7edc\u65f6\u5ef6\u5f80\u5f80\u5df2\u7ecf\u8db3\u591f\u4f4e\uff0c\u56e0\u6b64\u5bf9\u8fd9\u4e9b\u8fd1\u8ddd\u79bb\u7528\u6237\u800c\u8a00\uff0c\u6fc0\u8fdb\u7f13\u5b58\u7684\u91cd\u8981\u6027\u4e0d\u5982\u8de8\u6d0b\u6d41\u91cf\u90a3\u4e48\u9ad8\uff1b\u4f46\u6765\u81ea\u6b27\u6d32\u6216\u5317\u7f8e\u7684\u8bbf\u95ee\uff0c\u4ecd\u7136\u4f1a\u4ece\u7cbe\u5fc3\u8c03\u4f18\u7684\u8fb9\u7f18\u8282\u70b9\u4e2d\u83b7\u76ca\u826f\u591a\u3002\n  <\/p>\n<h3>5.1 CDN \u7f13\u5b58 TTL \u7ecf\u9a8c\u89c4\u5219<\/h3>\n<ul>\n<li>\n      <strong>\u5e26\u7248\u672c\u53f7\u7684\u9759\u6001\u8d44\u6e90\uff1a<\/strong>\u4f8b\u5982 <code>app.4f3c2.js<\/code> \u6216 <code>styles.9b1c.css<\/code> \u8fd9\u7c7b\u5e26\u6307\u7eb9\u7684\u9759\u6001\u6587\u4ef6\uff0c\u901a\u5e38\u53ef\u4ee5\u5728\u8fb9\u7f18\u8282\u70b9\u8bbe\u7f6e\u975e\u5e38\u957f\u7684 TTL\uff1a\u4e0d\u5c11\u56e2\u961f\u76f4\u63a5\u62c9\u5230\u591a\u5929\u751a\u81f3\u6309\u6708\u8ba1\u7b97\u3002\u56e0\u4e3a\u4e00\u65e6\u53d1\u5e03\u65b0\u7248\u672c\uff0c\u6587\u4ef6\u540d\u5c31\u4f1a\u53d8\u5316\uff0c\u81ea\u7136\u7ed5\u8fc7\u65e7\u7f13\u5b58\u3002\n    <\/li>\n<li>\n      <strong>\u5076\u5c14\u66f4\u65b0\u7684\u9759\u6001\u5a92\u4f53\uff1a<\/strong>\u5982\u5546\u54c1\u56fe\u7247\u3001\u6587\u6863 PDF \u7b49\uff0c\u53d8\u66f4\u9891\u7387\u4e0d\u9ad8\u7684\u8d44\u6e90\u53ef\u4ee5\u4f7f\u7528\u201c\u5c0f\u65f6\u7ea7\u6216\u5929\u7ea7\u201d\u7684 TTL\uff0c\u53ea\u8981\u4f60\u6709\u4e00\u5957\u660e\u786e\u7684\u7f13\u5b58\u5237\u65b0\uff08purge\uff09\u6d41\u7a0b\uff0c\u5728\u624b\u52a8\u66f4\u65b0\u65f6\u89e6\u53d1\u5373\u53ef\u3002\n    <\/li>\n<li>\n      <strong>HTML \u5165\u53e3\u9875\uff1a<\/strong>\u5bf9\u9ad8\u5ea6\u52a8\u6001\u7684\u9996\u9875\u6216\u6838\u5fc3\u843d\u5730\u9875\u800c\u8a00\uff0c\u5728 CDN \u4fa7\u91c7\u7528\u8f83\u77ed\u7684\u7f13\u5b58\u65f6\u957f\u53ef\u4ee5\u51cf\u5c11\u7528\u6237\u6df7\u4e71\u3002\u8fd9\u91cc\u4e00\u822c\u4e0d\u9700\u8981\u77ed\u5230\u201c\u79d2\u7ea7\u201d\uff0c\u53ef\u4ee5\u8003\u8651\u201c\u51e0\u5206\u949f\u7ea7\u201d\u914d\u5408\u5173\u952e\u8fd0\u8425\u6d3b\u52a8\u65f6\u7684\u5feb\u901f\u624b\u52a8\u6e05\u7f13\u5b58\u3002\n    <\/li>\n<li>\n      <strong>API\uff1a<\/strong>\u5bf9\u5e42\u7b49\u3001\u8bfb\u591a\u5199\u5c11\u7684\u63a5\u53e3\uff0c\u53ef\u4ee5\u5bb9\u5fcd\u5728\u5171\u4eab\u7f13\u5b58\u4e2d\u6709\u77ed\u65f6\u95f4\u7a97\u53e3\u7684\u7f13\u5b58\uff0c\u4ee5\u964d\u4f4e\u65e5\u672c\u540e\u7aef\u96c6\u7fa4\u7684\u538b\u529b\u3002\u5bf9\u654f\u611f\u6216\u5f3a\u7528\u6237\u7279\u5f02\u6027\u7684\u63a5\u53e3\uff0c\u5219\u5e94\u907f\u514d\u5728\u5171\u4eab\u8fb9\u7f18\u7f13\u5b58\u4e2d\u88ab\u7f13\u5b58\u3002\n    <\/li>\n<\/ul>\n<h3>5.2 DNS TTL \u7ecf\u9a8c\u89c4\u5219<\/h3>\n<ul>\n<li>\n      <strong>\u51e0\u4e4e\u4e0d\u53d8\u7684\u8bb0\u5f55\uff1a<\/strong>\u4f8b\u5982\u957f\u671f\u7a33\u5b9a\u6307\u5411\u4e1c\u4eac\u67d0\u4e2a\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u8bb0\u5f55\uff0c\u53ef\u4ee5\u4f7f\u7528\u201c\u5c0f\u65f6\u7ea7\u201d\u7684 TTL\uff0c\u8fd9\u6837\u65e2\u80fd\u51cf\u8f7b\u6743\u5a01 DNS \u670d\u52a1\u5668\u7684\u67e5\u8be2\u538b\u529b\uff0c\u4e5f\u80fd\u7565\u5fae\u964d\u4f4e\u89e3\u6790\u65f6\u5ef6\u3002\n    <\/li>\n<li>\n      <strong>\u53c2\u4e0e\u6d41\u91cf\u8c03\u5ea6\u7684\u4e3b\u673a\u540d\uff1a<\/strong>\u5982\u679c\u67d0\u6761\u8bb0\u5f55\u88ab\u7528\u5728\u8de8\u591a\u4e2a\u65e5\u672c\u673a\u623f\u6216\u5168\u7403 PoP \u7684\u4e3b\u52a8\u6d41\u91cf\u8c03\u5ea6\u4e2d\uff0c\u90a3\u4e48\u8f83\u77ed\u7684 TTL \u80fd\u8ba9\u4f60\u5728\u6545\u969c\u6216\u7ef4\u62a4\u65f6\u66f4\u7075\u6d3b\u5730\u8c03\u6574\u6743\u91cd\u548c\u6d41\u91cf\u8d70\u5411\u3002\n    <\/li>\n<li>\n      <strong>\u8ba1\u5212\u5185\u8fc1\u79fb\uff1a<\/strong>\u5728\u4ece\u4e00\u4e2a\u65e5\u672c\u673a\u67dc\u8fc1\u5230\u53e6\u4e00\u4e2a\u3001\u6216\u8005\u4ece\u8001\u7684\u670d\u52a1\u5668\u79df\u7528\uff0f\u670d\u52a1\u5668\u6258\u7ba1\u670d\u52a1\u5546\u8fc1\u5230\u65b0\u7684\u4f9b\u5e94\u5546\u4e4b\u524d\uff0c\u63d0\u524d\u628a\u76f8\u5173\u8bb0\u5f55\u7684 TTL \u964d\u5230\u5f88\u4f4e\u7684\u6570\u503c\uff0c\u53ef\u4ee5\u6781\u5927\u63d0\u9ad8\u5207\u6362\u7a97\u53e3\u7684\u53ef\u9884\u6d4b\u6027\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u8fd9\u4e9b\u53ea\u662f\u8d77\u59cb\u6a21\u677f\uff0c\u800c\u4e0d\u662f\u786c\u6027\u89c4\u5b9a\u3002\u6700\u7ec8\u5e94\u8be5\u7531\u76d1\u63a7\u548c\u771f\u5b9e\u7528\u6237\u4f53\u9a8c\uff08RUM\uff09\u6570\u636e\u6765\u6307\u5bfc\u4f60\u662f\u5426\u53ef\u4ee5\u8fdb\u4e00\u6b65\u52a0\u957f\u6216\u7f29\u77ed TTL\u3002\n  <\/p>\n<h2><strong>6. \u65e5\u672c\u670d\u52a1\u5668\u79df\u7528\u4e0e\u670d\u52a1\u5668\u6258\u7ba1\u7684\u73b0\u5b9e\u60c5\u51b5<\/strong><\/h2>\n<p>\n    \u5f53\u4f60\u5728\u65e5\u672c\u7684\u673a\u623f\u79df\u7528\u670d\u52a1\u5668\u6216\u865a\u62df\u5b9e\u4f8b\u65f6\uff0c\u4e0a\u6e38\u4f9b\u5e94\u5546\u4e00\u822c\u4f1a\u7528 \u201chosting\u201d \u548c \u201ccolocation\u201d \u8fd9\u4e24\u4e2a\u82f1\u6587\u8bcd\u6765\u63cf\u8ff0\u81ea\u5df1\u7684\u670d\u52a1\u3002\u6309\u4e2d\u6587\u672f\u8bed\uff0c\u201chosting\u201d \u5bf9\u5e94\u7684\u662f\u201c\u670d\u52a1\u5668\u79df\u7528\u201d\uff0c\u5373\u7531\u670d\u52a1\u5546\u63d0\u4f9b\u786c\u4ef6\u8d44\u6e90\uff0c\u4f60\u6309\u914d\u7f6e\u79df\u7528\uff0c\u4e0e\u539f\u59cb\u7684\u201c\u670d\u52a1\u5668\u79df\u7528\u201d\u4e00\u8bcd\u542b\u4e49\u4e00\u81f4\uff1b\u201ccolocation\u201d \u5219\u662f\u201c\u670d\u52a1\u5668\u6258\u7ba1\u201d\uff0c\u4e5f\u5c31\u662f\u4f60\u81ea\u5907\u670d\u52a1\u5668\uff0c\u628a\u673a\u5668\u6258\u7ba1\u5728\u5bf9\u65b9\u673a\u67dc\u91cc\u3002\u65e0\u8bba\u54ea\u79cd\u6a21\u5f0f\uff0cDNS \u914d\u7f6e\u548c CDN \u5206\u53d1\u7b56\u7565\u4f9d\u7136\u7531\u4f60\u81ea\u5df1\u8d1f\u8d23\u3002\n  <\/p>\n<p>\n    \u5bf9\u5728\u65e5\u672c\u8fdb\u884c\u5927\u89c4\u6a21 Japan server hosting \u7684\u56e2\u961f\u800c\u8a00\uff0c\u6d41\u91cf\u5f80\u5f80\u4f1a\u662f\u591a\u79cd\u6765\u6e90\u7684\u6df7\u5408\uff1a\n  <\/p>\n<ul>\n<li>\n      \u6765\u81ea\u65e5\u672c\u672c\u5730 ISP \u7684\u76f4\u8fde\u8bbf\u95ee\uff0c\u8fd9\u90e8\u5206\u5f80\u8fd4\u65f6\u5ef6\u5df2\u7ecf\u5f88\u4f4e\u3002\n    <\/li>\n<li>\n      \u6765\u81ea\u5468\u8fb9\u56fd\u5bb6\u7684\u4f01\u4e1a\u7f51\u7edc\u548c\u79fb\u52a8\u8fd0\u8425\u5546\u7684\u8de8\u5883\u8bbf\u95ee\u3002\n    <\/li>\n<li>\n      \u6765\u81ea\u6b27\u6d32\u6216\u7f8e\u6d32\u7684\u957f\u8ddd\u79bb\u8bbf\u95ee\uff0c\u5728\u8fd9\u4e9b\u573a\u666f\u4e0b\uff0c\u4e00\u4e2a\u90e8\u7f72\u5f97\u5f53\u7684\u8fb9\u7f18\u8282\u70b9\u53ef\u4ee5\u663e\u8457\u6539\u5584 TTFB\uff08\u9996\u5b57\u8282\u65f6\u95f4\uff09\u3002\n    <\/li>\n<\/ul>\n<p>\n    DNS TTL \u9700\u8981\u8db3\u591f\u77ed\uff0c\u4ee5\u4fbf\u5728\u67d0\u53f0\u6258\u7ba1\u670d\u52a1\u5668\u6216\u67d0\u4e2a\u673a\u67dc\u51fa\u73b0\u6545\u969c\u65f6\uff0c\u53ef\u4ee5\u5feb\u901f\u7ed5\u8fc7\u6216\u62bd\u7a7a\u8fd9\u4e00\u6279\u8282\u70b9\uff0c\u800c\u4e0d\u662f\u88ab\u5361\u5728\u90a3\u91cc\u6570\u5c0f\u65f6\u3002CDN \u7f13\u5b58 TTL \u5219\u9700\u8981\u8db3\u591f\u957f\uff0c\u4ee5\u514d\u5728\u8de8\u5883\u9ad8\u5e76\u53d1\u8bbf\u95ee\u65f6\uff0c\u6bcf\u4e00\u6b21\u533a\u57df\u6027\u6d41\u91cf\u5cf0\u503c\u90fd\u628a\u65e5\u672c origin \u76f4\u63a5\u6253\u6ee1\u3002\n  <\/p>\n<h2><strong>7. \u6df7\u6dc6\u4e24\u7c7b TTL \u5e26\u6765\u7684\u5178\u578b\u6545\u969c\u6a21\u5f0f<\/strong><\/h2>\n<p>\n    \u5f53\u65e5\u672c\u673a\u623f\u5728\u51cc\u6668 3 \u70b9\u53d1\u751f\u4e8b\u6545\u65f6\uff0c\u4f60\u80fd\u591a\u5feb\u6062\u590d\u670d\u52a1\uff0c\u5f88\u5927\u7a0b\u5ea6\u4e0a\u53d6\u51b3\u4e8e\u4f60\u662f\u5426\u771f\u6b63\u5206\u6e05\u4e86\u8fd9\u4e24\u7c7b TTL\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5728\u4e8b\u6545\u590d\u76d8\u4e2d\u53cd\u590d\u51fa\u73b0\u7684\u6a21\u5f0f\u3002\n  <\/p>\n<ol>\n<li>\n      <strong>DNS \u5207\u6362\u65f6\u95f4\u8fdc\u8d85\u9884\u671f\uff1a<\/strong>\u67d0\u6761\u8bb0\u5f55\u66fe\u7ecf\u88ab\u8bbe\u7f6e\u6210\u201c\u4e00\u5929\u7ea7\u201d\u7684 TTL\uff0c\u540e\u6765\u867d\u7136\u5728\u533a\u57df\u6587\u4ef6\u4e2d\u88ab\u6539\u5c0f\uff0c\u4f46\u5f88\u591a\u89e3\u6790\u5668\u65e9\u5df2\u6309\u65e7\u503c\u7f13\u5b58\u3002\u7b49\u5230\u7d27\u6025\u6545\u969c\u5207\u6362\u65f6\uff0c\u90e8\u5206\u7528\u6237\u7fa4\u8fd8\u4f1a\u6301\u7eed\u5f88\u957f\u4e00\u6bb5\u65f6\u95f4\u6253\u5230\u65e7 IP\uff0c\u76f4\u5230\u4e4b\u524d\u90a3\u4e2a\u66f4\u957f\u7684 TTL \u5b8c\u6574\u8d70\u5b8c\u3002\n    <\/li>\n<li>\n      <strong>\u524d\u7aef\u201c\u534a\u66f4\u65b0\u201d\u72b6\u6001\uff1a<\/strong>HTML \u9875\u9762\u8981\u4e48\u4e0d\u5728 CDN \u7f13\u5b58\u91cc\uff0c\u8981\u4e48 TTL \u5f88\u77ed\uff0c\u4f46\u5bf9\u5e94\u7684\u9759\u6001\u8d44\u6e90\uff08JS\/CSS\uff09\u5374\u5728\u8fb9\u7f18\u88ab\u957f\u65f6\u95f4\u7f13\u5b58\u3002\u4e00\u6b21\u6ca1\u6709\u66f4\u65b0\u8d44\u6e90\u6307\u7eb9\uff08\u6587\u4ef6\u540d\uff09\u7684\u90e8\u7f72\uff0c\u4f1a\u5bfc\u81f4\u5ba2\u6237\u7aef\u4ece\u6b27\u6d32\u6216\u7f8e\u6d32\u7684\u67d0\u4e2a\u8fdc\u7aef\u8fb9\u7f18\u8282\u70b9\u8bfb\u5230\u65e7\u7248 JavaScript\uff0c\u540c\u65f6\u53c8\u4ece\u65e5\u672c origin \u62ff\u5230\u65b0\u7248 HTML\u3002\n    <\/li>\n<li>\n      <strong>\u8c03\u6574 TTL \u5bfc\u81f4 origin \u88ab\u6253\u5d29\uff1a<\/strong>\u6709\u4eba\u4e3a\u4e86\u201c\u63d0\u9ad8\u4e00\u81f4\u6027\u201d\u628a\u70ed\u95e8 API \u5728 CDN \u4e0a\u7684\u7f13\u5b58 TTL \u964d\u5230\u51e0\u79d2\uff0c\u7ed3\u679c\u662f\u65e5\u672c origin \u96c6\u7fa4\u6536\u5230\u6765\u81ea\u5404\u4e2a\u8fb9\u7f18\u8282\u70b9\u7684\u56de\u6e90\u6d2a\u5cf0\uff0cCPU\u3001\u7f51\u7edc\u6216\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u88ab\u4e00\u4e0b\u5b50\u6253\u6ee1\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u628a\u201c\u6539 DNS\u201d\u4e0e\u201c\u6e05 CDN \u7f13\u5b58\u201d\u62c6\u6210\u4e24\u5957\u72ec\u7acb\u7684\u64cd\u4f5c\u624b\u518c\uff0c\u5206\u522b\u8bbe\u8ba1\u4e0d\u540c\u7684\u6309\u94ae\u3001\u6b65\u9aa4\u4e0e\u56de\u6eda\u7b56\u7565\uff0c\u662f\u975e\u5e38\u503c\u5f97\u6295\u5165\u65f6\u95f4\u53bb\u505a\u7684\u4e8b\u3002\u5728\u9ad8\u538b\u72b6\u6001\u4e0b\u628a\u5b83\u4eec\u6df7\u5728\u4e00\u8d77\u51fa\u9519\uff0c\u6bd4\u5927\u591a\u6570\u4eba\u60f3\u8c61\u4e2d\u66f4\u5e38\u89c1\u3002\n  <\/p>\n<h2><strong>8. \u5982\u4f55\u6d4b\u91cf\u548c\u9a8c\u8bc1 TTL \u7684\u5b9e\u9645\u884c\u4e3a<\/strong><\/h2>\n<p>\n    \u6ca1\u6709\u53ef\u89c1\u6027\uff0c\u5c31\u8c08\u4e0d\u4e0a\u771f\u6b63\u7ba1\u7406 TTL\u3002\u597d\u5728 CDN \u548c DNS \u4e24\u5c42\u90fd\u4f1a\u7559\u4e0b\u8db3\u591f\u591a\u7684\u201c\u6307\u7eb9\u201d\uff0c\u8ba9\u5de5\u7a0b\u5e08\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4\u884c\u63a8\u65ad\u5b83\u4eec\u7684\u72b6\u6001\u3002\n  <\/p>\n<ul>\n<li>\n      <strong>\u68c0\u67e5 HTTP \u5934\u90e8\uff1a<\/strong>\u4f7f\u7528 curl\u3001\u6d4f\u89c8\u5668\u5f00\u53d1\u8005\u5de5\u5177\u6216\u8005\u6293\u5305\u4ee3\u7406\uff0c\u67e5\u770b\u4e0e\u7f13\u5b58\u76f8\u5173\u7684\u5934\u90e8\u3002\u5f88\u591a CDN \u4f1a\u9644\u52a0\u8c03\u8bd5\u7528\u7684\u81ea\u5b9a\u4e49\u5934\u90e8\uff0c\u5c55\u793a\u5269\u4f59\u751f\u547d\u5468\u671f\u3001\u662f\u5426\u547d\u4e2d\u7f13\u5b58\u7b49\u4fe1\u606f\u3002\n    <\/li>\n<li>\n      <strong>\u76f4\u63a5\u67e5\u8be2 DNS \u89e3\u6790\u5668\uff1a<\/strong>\u4f7f\u7528 <code>dig<\/code> \u6216 <code>kdig<\/code> \u4e4b\u7c7b\u5de5\u5177\uff0c\u53ef\u4ee5\u770b\u5230\u6bcf\u6761\u8bb0\u5f55\u5728\u89e3\u6790\u5668\u8fd4\u56de\u65f6\u5269\u4f59\u7684 TTL\u3002\u5206\u522b\u5bf9\u591a\u4e2a\u516c\u5171\u89e3\u6790\u5668\u53d1\u8d77\u67e5\u8be2\uff0c\u5c31\u80fd\u5feb\u901f\u5224\u65ad\u7f13\u5b58\u662f\u5426\u5df2\u7ecf\u201c\u7a33\u5b9a\u201d\u4e0b\u6765\u3002\n    <\/li>\n<li>\n      <strong>\u4f7f\u7528\u5408\u6210\u63a2\u6d4b\uff1a<\/strong>\u5168\u7403\u76d1\u63a7\u670d\u52a1\u53ef\u4ee5\u5b9a\u671f\u8bbf\u95ee\u7279\u5b9a\u4e3b\u673a\u540d\uff0c\u8bb0\u5f55\u5b83\u4eec\u89e3\u6790\u5230\u7684 IP \u4ee5\u53ca\u5b9e\u9645\u6536\u5230\u7684 HTTP \u54cd\u5e94\u3002\u5bf9\u9762\u5411\u5168\u7403\u8bbf\u95ee\u7684\u65e5\u672c\u4e1a\u52a1\u57df\u540d\u800c\u8a00\uff0c\u8fd9\u7c7b\u63a2\u6d4b\u975e\u5e38\u9002\u5408\u7528\u6765\u5206\u6790\u4e0d\u540c\u56fd\u5bb6\u8bbf\u95ee\u65f6\u7684 DNS \u4e0e CDN \u884c\u4e3a\u3002\n    <\/li>\n<li>\n      <strong>\u57fa\u4e8e\u65e5\u5fd7\u7684\u53cd\u63a8\uff1a<\/strong>\u901a\u8fc7\u5bf9\u6bd4 origin \u54cd\u5e94\u65e5\u5fd7\u548c\u8fb9\u7f18\u8282\u70b9\u65e5\u5fd7\u4e0a\u7684\u65f6\u95f4\u6233\uff0c\u53ef\u4ee5\u4f30\u7b97\u5b9e\u9645\u547d\u4e2d\u7387\uff0c\u5e76\u9a8c\u8bc1\u7f13\u5b58\u8fc7\u671f\u65f6\u95f4\u662f\u5426\u548c\u914d\u7f6e\u7ed3\u679c\u4e00\u81f4\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u5982\u679c\u7f3a\u5c11\u8fd9\u6837\u7684\u53cd\u9988\u95ed\u73af\uff0cTTL \u8bbe\u7f6e\u5c31\u53ea\u80fd\u505c\u7559\u5728\u201c\u62cd\u8111\u888b\u201d\uff0c\u4efb\u4f55\u201c\u4f20\u64ad\u73b0\u5728\u5e94\u8be5\u5df2\u7ecf\u5b8c\u6210\u4e86\u201d\u7684\u8bf4\u6cd5\uff0c\u90fd\u53ea\u662f\u4e50\u89c2\u63a8\u6d4b\u3002\n  <\/p>\n<h2><strong>9. SEO\u3001\u9875\u9762\u4f53\u9a8c\uff0c\u4ee5\u53ca\u4e3a\u4ec0\u4e48 TTL \u4f9d\u7136\u91cd\u8981<\/strong><\/h2>\n<p>\n    \u641c\u7d22\u5f15\u64ce\u5e76\u4e0d\u4f1a\u5355\u72ec\u5173\u5fc3\u4f60\u914d\u7f6e\u4e86\u591a\u5c11\u79d2\u7684 TTL\uff0c\u5b83\u771f\u6b63\u5173\u5fc3\u7684\u662f\u4e00\u4e2a\u7efc\u5408\u6548\u679c\uff1a\u9996\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09\u3001\u5e03\u5c40\u7a33\u5b9a\u6027\u3001\u53ef\u7528\u6027\uff0c\u4ee5\u53ca\u722c\u53d6\u8fc7\u7a0b\u4e2d\u9047\u5230\u9519\u8bef\u7684\u9891\u7387\u3002\u7cbe\u5fc3\u8c03\u4f18\u7684\u7f13\u5b58\u548c\u89e3\u6790\u7b56\u7565\uff0c\u6700\u7ec8\u90fd\u4f1a\u53cd\u6620\u5728\u8fd9\u4e9b\u6307\u6807\u4e0a\u3002\n  <\/p>\n<ul>\n<li>\n      <strong>\u4e3a\u722c\u866b\u63d0\u4f9b\u66f4\u5feb\u54cd\u5e94\uff1a<\/strong>\u5f53\u722c\u866b\u80fd\u4ece\u79bb\u81ea\u5df1\u6700\u8fd1\u7684\u8fb9\u7f18\u8282\u70b9\u83b7\u53d6\u7a33\u5b9a\u8d44\u6e90\u65f6\uff0c\u54cd\u5e94\u901f\u5ea6\u4f1a\u66f4\u5feb\uff0c\u5b83\u7684\u722c\u53d6\u914d\u989d\u4e5f\u80fd\u88ab\u66f4\u9ad8\u6548\u5730\u5229\u7528\u3002\u957f\u8fdc\u6765\u770b\uff0c\u6709\u5229\u4e8e\u641c\u7d22\u5f15\u64ce\u66f4\u5b8c\u6574\u3001\u66f4\u7a33\u5b9a\u5730\u6536\u5f55\u4f60\u7684\u65e5\u672c\u7ad9\u70b9\u5185\u5bb9\u3002\n    <\/li>\n<li>\n      <strong>\u66f4\u7a33\u5b9a\u7684\u53ef\u7528\u6027\uff1a<\/strong>\u652f\u6301\u5feb\u901f\u6545\u969c\u5207\u6362\u7684 DNS \u914d\u7f6e\uff0c\u53ef\u4ee5\u7f29\u77ed\u722c\u866b\u9047\u5230\u8fde\u63a5\u9519\u8bef\u7684\u65f6\u95f4\u7a97\u53e3\u3002\u8fd9\u79cd\u7a33\u5b9a\u6027\u4f1a\u4ee5\u4e00\u79cd\u4e0d\u90a3\u4e48\u663e\u773c\u4f46\u6301\u7eed\u7684\u65b9\u5f0f\u5f71\u54cd\u6392\u5e8f\u3002\n    <\/li>\n<li>\n      <strong>\u53ef\u63a7\u7684\u66f4\u65b0\u8282\u594f\uff1a<\/strong>\u5408\u7406\u7684 TTL \u80fd\u786e\u4fdd\u5f53\u4f60\u53d1\u5e03\u91cd\u8981\u5185\u5bb9\u66f4\u65b0\u65f6\uff0c\u5b83\u4eec\u4f1a\u5728\u4e00\u4e2a\u53ef\u9884\u6d4b\u7684\u65f6\u95f4\u7a97\u53e3\u5185\u5bf9\u7528\u6237\u548c\u641c\u7d22\u673a\u5668\u4eba\u540c\u65f6\u751f\u6548\uff0c\u800c\u4e0d\u662f\u8ba9\u4e00\u90e8\u5206\u8bbf\u95ee\u8005\u6216\u673a\u5668\u4eba\u591a\u770b\u51e0\u5929\u65e7\u9875\u9762\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u5f53\u7136\uff0c\u4ec5\u4ec5\u8f6c\u52a8 TTL \u8fd9\u4e2a\u65cb\u94ae\uff0c\u4e0d\u4f1a\u795e\u5947\u5730\u628a\u7ad9\u70b9\u9001\u4e0a\u641c\u7d22\u7ed3\u679c\u9996\u9875\u3002\u4f46\u968f\u610f\u7684\u8bbe\u7f6e\u786e\u5b9e\u4f1a\u5e73\u767d\u5236\u9020\u6469\u64e6\uff0c\u800c\u7ecf\u8fc7\u6df1\u601d\u719f\u8651\u7684 TTL \u5219\u6709\u52a9\u4e8e\u79fb\u9664\u6280\u672f\u4e0a\u7684\u201c\u62e6\u8def\u864e\u201d\uff0c\u8ba9\u5185\u5bb9\u8d28\u91cf\u548c\u7ad9\u70b9\u4ef7\u503c\u66f4\u5bb9\u6613\u88ab\u641c\u7d22\u5f15\u64ce\u6b63\u786e\u611f\u77e5\u3002\n  <\/p>\n<h2><strong>10. \u9762\u5411\u5de5\u7a0b\u5e08\u7684\u5b9e\u7528\u68c0\u67e5\u6e05\u5355<\/strong><\/h2>\n<p>\n    \u4e3a\u4e86\u628a\u4e0a\u9762\u7684\u7406\u8bba\u843d\u5230\u5b9e\u5904\uff0c\u4e0b\u9762\u662f\u4e00\u4efd\u53ef\u4ee5\u76f4\u63a5\u5957\u7528\u5728\u65e5\u672c\u4e1a\u52a1\u6808\u4e0a\u7684\u7b80\u5355\u6e05\u5355\u3002\u4f60\u53ef\u4ee5\u628a\u5b83\u5f53\u4f5c\u57fa\u7ebf\uff0c\u6839\u636e\u81ea\u5df1\u7684\u67b6\u6784\u3001\u6d41\u91cf\u7279\u5f81\u548c\u76d1\u63a7\u73b0\u72b6\u8fdb\u884c\u8c03\u6574\u3002\n  <\/p>\n<ol>\n<li>\n      <strong>\u8d44\u4ea7\u76d8\u70b9\uff1a<\/strong>\u5217\u51fa\u6240\u6709\u4e3b\u673a\u540d\u3001\u8bb0\u5f55\u7c7b\u578b\u4ee5\u53ca\u5f53\u524d\u7684 DNS TTL \u503c\u3002\u6807\u8bb0\u51fa\u53c2\u4e0e\u8d1f\u8f7d\u5747\u8861\u6216\u707e\u96be\u6062\u590d\u6d41\u7a0b\u7684\u5173\u952e\u8bb0\u5f55\u3002\n    <\/li>\n<li>\n      <strong>\u8d44\u6e90\u5206\u7c7b\uff1a<\/strong>\u6309\u201c\u957f\u671f\u9759\u6001\u3001\u7f13\u6162\u53d8\u5316\u7684\u9759\u6001\u5185\u5bb9\u3001\u52a8\u6001 HTML\u3001API\u201d\u5bf9\u5185\u5bb9\u8fdb\u884c\u5f52\u7c7b\uff0c\u5e76\u4e3a\u6bcf\u4e00\u7c7b\u5199\u6e05\u671f\u671b\u7684\u7f13\u5b58\u884c\u4e3a\u3002\n    <\/li>\n<li>\n      <strong>\u5bf9\u9f50\u5934\u90e8\u4e0e CDN \u89c4\u5219\uff1a<\/strong>\u786e\u4fdd\u65e5\u672c origin \u8fd4\u56de\u7684 HTTP \u5934\u90e8\u4e0e CDN \u63a7\u5236\u53f0\u91cc\u7684\u89c4\u5219\u5f7c\u6b64\u4e00\u81f4\uff0c\u907f\u514d\u76f8\u4e92\u77db\u76fe\u7684\u6307\u4ee4\u3002\n    <\/li>\n<li>\n      <strong>\u6f14\u7ec3\u8fc1\u79fb\uff1a<\/strong>\u5bf9\u4e8e\u4efb\u4f55\u4ece\u4e00\u5bb6\u65e5\u672c\u670d\u52a1\u5668\u79df\u7528\uff0f\u670d\u52a1\u5668\u6258\u7ba1\u673a\u623f\u8fc1\u5230\u53e6\u4e00\u5bb6\u7684\u8ba1\u5212\uff0c\u5148\u5728\u4f4e\u73af\u5883\u7528\u540c\u6837\u7684 TTL \u505a\u4e00\u6b21\u5b8c\u6574\u6f14\u7ec3\uff0c\u5b9e\u9645\u6d4b\u91cf\u5207\u6362\u9700\u8981\u591a\u4e45\u3002\n    <\/li>\n<li>\n      <strong>\u76d1\u6d4b\u4f20\u64ad\u8fc7\u7a0b\uff1a<\/strong>\u7f16\u5199\u5c0f\u811a\u672c\uff0c\u4ece\u591a\u4e2a\u89e3\u6790\u5668\u91c7\u6837 DNS \u7ed3\u679c\uff0c\u5e76\u901a\u8fc7 CDN \u83b7\u53d6 HTTP \u54cd\u5e94\uff0c\u5b9e\u9645\u8bb0\u5f55\u6bcf\u79cd\u53d8\u66f4\u4f20\u64ad\u5b8c\u6210\u6240\u9700\u7684\u65f6\u95f4\u3002\n    <\/li>\n<li>\n      <strong>\u6c89\u6dc0\u4e8b\u6545\u624b\u518c\uff1a<\/strong>\u5206\u522b\u4e3a\u201c\u8c03\u6574 DNS\u201d\u4e0e\u201c\u6e05\u7406\uff0f\u4fee\u6539 CDN \u7f13\u5b58\u201d\u5199\u72ec\u7acb\u7684\u8fd0\u884c\u624b\u518c\uff0c\u5305\u542b\u4fdd\u62a4\u63aa\u65bd\u3001\u6838\u5bf9\u6e05\u5355\u4ee5\u53ca\u9884\u671f\u6062\u590d\u65f6\u95f4\uff0c\u5e76\u5b9a\u671f\u6f14\u7ec3\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u968f\u7740\u65f6\u95f4\u63a8\u79fb\uff0c\u8fd9\u79cd\u89c4\u8303\u5316\u7684\u5b9e\u8df5\u4f1a\u628a TTL \u4ece\u4e00\u4e2a\u6a21\u7cca\u3001\u5e26\u70b9\u7384\u5b66\u5473\u9053\u7684\u795e\u79d8\u53c2\u6570\uff0c\u53d8\u6210\u4f60\u5e73\u53f0\u4e0a\u4e00\u4e2a\u660e\u786e\u3001\u53ef\u6d4b\u8bd5\u3001\u53ef\u9884\u6d4b\u7684\u63a7\u5236\u9762\u3002\n  <\/p>\n<h2><strong>11. \u5199\u7ed9\u5728\u610f\u7ec6\u8282\u7684\u5de5\u7a0b\u5e08\u7684\u6700\u540e\u51e0\u53e5\u8bdd<\/strong><\/h2>\n<p>\n    \u5bf9\u7ecf\u9a8c\u4e30\u5bcc\u7684\u8fd0\u7ef4\u548c\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u8c03 TTL \u7684\u4e50\u8da3\u5e76\u4e0d\u5728\u4e8e\u80cc\u51fa\u591a\u5c11\u9ed8\u8ba4\u503c\uff0c\u800c\u5728\u4e8e\u771f\u6b63\u7406\u89e3\u201c\u591a\u4e2a\u72ec\u7acb\u7f13\u5b58\u5c42\u53e0\u52a0\u8d77\u6765\u7684\u6574\u4f53\u884c\u4e3a\u201d\u3002CDN \u8fb9\u7f18\u548c DNS \u89e3\u6790\u5668\u5404\u81ea\u638c\u63a7\u7740\u6d41\u91cf\u4e2d\u4e0d\u540c\u7684\u6743\u529b\uff1a\u4e00\u4e2a\u51b3\u5b9a\u201c\u53bb\u54ea\u513f\u201d\uff0c\u4e00\u4e2a\u51b3\u5b9a\u201c\u62ff\u4ec0\u4e48\u201d\u3002\u5982\u679c\u5728\u8ba8\u8bba\u6216\u914d\u7f6e\u65f6\u628a\u5b83\u4eec\u6df7\u5728\u4e00\u8d77\uff0c\u5c31\u5f88\u5bb9\u6613\u5f15\u5165\u90a3\u4e9b\u9690\u853d\u53c8\u96be\u4ee5\u5b9a\u4f4d\u7684 bug\u3002\u5bf9\u8fd0\u884c\u5728\u65e5\u672c\u57fa\u7840\u8bbe\u65bd\u4e0a\u7684\u4e1a\u52a1\u800c\u8a00\uff0c\u672c\u5730\u7528\u6237\u548c\u5168\u7403\u8bbf\u95ee\u4f1a\u5728\u8fd9\u91cc\u6c47\u5408\uff0c\u8fd9\u79cd\u7ec6\u5fae\u5dee\u5f02\u6700\u7ec8\u4f1a\u76f4\u63a5\u5448\u73b0\u5728\u5ef6\u8fdf\u66f2\u7ebf\u3001\u9519\u8bef\u65e5\u5fd7\u4ee5\u53ca\u641c\u7d22\u722c\u53d6\u7edf\u8ba1\u4e2d\u3002\u82e5\u53ea\u80fd\u4ece\u672c\u6587\u5e26\u8d70\u4e00\u4ef6\u4e8b\uff0c\u90a3\u5c31\u8bf7\u517b\u6210\u4e00\u4e2a\u4e60\u60ef\uff1a\u6bcf\u5f53\u4f60\u89c4\u5212\u3001\u6392\u67e5\u6216\u89e3\u91ca\u4e0e CDN \u7f13\u5b58 TTL\u3001DNS TTL \u5dee\u5f02\u3001\u65e5\u672c\u670d\u52a1\u5668\u79df\u7528\u76f8\u5173\u7684\u884c\u4e3a\u65f6\uff0c\u90fd\u8981\u81ea\u89c9\u62c9\u51fa\u4e00\u6761\u201c\u57df\u540d\u5c42\u201d\u548c\u201c\u8fb9\u7f18\u7f13\u5b58\u5c42\u201d\u4e4b\u95f4\u7684\u6e05\u6670\u5206\u754c\u7ebf\u3002\n  <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u679c\u4f60\u7684\u65e5\u5e38\u5de5\u4f5c\u5c31\u662f\u76ef\u5ef6\u8fdf\u66f2\u7ebf\u3001\u770b\u5404\u79cd\u5934\u90e8\u5b57\u6bb5\uff0c\u90a3\u4f60\u5f88\u53ef\u80fd\u5df2\u7ecf\u548c TTL \u6253\u8fc7\u65e0\u6570\u6b21\u4ea4\u9053\uff0c\u5374\u4ecd\u7136\u80fd\u5728\u751f\u4ea7\u73af\u5883\u91cc\u770b\u5230\u5b83\u88ab\u5404\u79cd\u8bef\u7528\u3002\u672c\u6587\u5199\u7ed9\u5728 \u65e5\u672c\u670d\u52a1\u5668 \u4e0a\u8dd1\u4e1a\u52a1\u7684\u5de5\u7a0b\u5e08\uff0c\u5e0c\u671b\u5e2e\u4f60\u7cbe\u51c6\u638c\u63a7\u6bd4\u7279\u5982\u4f55\u5728\u7f51\u7edc\u4e2d\u6d41\u52a8\u3001\u53c8\u5728\u4ec0\u4e48\u4f4d\u7f6e\u88ab\u7f13\u5b58\u3002\u6211\u4eec\u4f1a\u7ed3\u5408\u771f\u5b9e\u4e16\u754c\u4e2d CDN \u7f13\u5b58\u548c DNS \u89e3\u6790\u5668\u7684\u884c\u4e3a\uff0c\u518d\u628a\u5b83\u4eec\u548c\u53ef\u89c2\u6d4b\u6027\u3001\u6545\u969c\u5207\u6362\u4ee5\u53ca SEO 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