{"id":35815,"date":"2026-09-01T17:05:10","date_gmt":"2026-09-01T09:05:10","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-tw\/why-lower-dns-ttl-before-a-site-migration\/"},"modified":"2026-09-01T17:08:53","modified_gmt":"2026-09-01T09:08:53","slug":"why-lower-dns-ttl-before-a-site-migration","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/why-lower-dns-ttl-before-a-site-migration\/","title":{"rendered":"\u7db2\u7ad9\u9077\u79fb\u524d\u70ba\u4ec0\u9ebc\u8981\u964d\u4f4e DNS TTL"},"content":{"rendered":"<p>\n    \u5982\u679c\u4f60\u66fe\u7d93\u76ef\u8457 traceroute \u767c\u5446\uff0c\u60f3\u4e0d\u660e\u767d\u70ba\u4ec0\u9ebc\u5728\u4f60\u300c\u5207\u63db\u4e86 DNS\u300d\u5f88\u4e45\u4e4b\u5f8c\uff0c\u4ecd\u7136\u9084\u6709\u4f7f\u7528\u8005\u6253\u5230\u820a IP\uff0c\u90a3\u9019\u7bc7\u6587\u7ae0\u5c31\u662f\u70ba\u4f60\u6e96\u5099\u7684\u3002\u6211\u5011\u6703\u62c6\u89e3\u5728\u4f60\u9077\u79fb\u7db2\u7ad9\uff08\u7279\u5225\u662f\u628a\u696d\u52d9\u9077\u79fb\u5230\u65e5\u672c\u4f3a\u670d\u5668\uff09\u6642\uff0c\u89e3\u6790\u5668\u548c\u5feb\u53d6\u5167\u90e8\u7a76\u7adf\u767c\u751f\u4e86\u4ec0\u9ebc\uff0c\u4ee5\u53ca\u70ba\u4ec0\u9ebc\u964d\u4f4e DNS TTL \u662f\u4f60\u5be6\u73fe\u63a5\u8fd1\u96f6\u505c\u6a5f\u5207\u63db\u6642\u6700\u6709\u529b\u7684\u63a7\u5236\u687f\u3002\u6574\u500b\u904e\u7a0b\u4e2d\u6211\u5011\u6703\u53cd\u8986\u570d\u7e5e\u4e00\u500b\u5177\u9ad4\u8a5e\u7d44\u4f86\u601d\u8003\uff1aDNS \u7de9\u5b58 TTL\uff5c\u7db2\u7ad9\u9077\u79fb\u81f3<a target=\"_blank\" href=\"https:\/\/www.varidata.com\/zh-tw\/server\/tokyo\/cn2\/\">\u65e5\u672c\u4f3a\u670d\u5668<\/a>\uff5c\u96f6\u505c\u6a5f\u8a17\u7ba1\u8207\u6a5f\u623f\u8a17\u7ba1\u670d\u52d9\u3002\n  <\/p>\n<h2><strong>1. \u7d66\u6c92\u8010\u5fc3\u5de5\u7a0b\u5e2b\u770b\u7684 DNS TTL \u4e00\u6bb5\u8a71\u89e3\u91cb<\/strong><\/h2>\n<\/h2>\n<p>\n    DNS \u7684 time-to-live\uff08TTL\uff09\u672c\u8cea\u4e0a\u5c31\u662f\u5feb\u53d6\u4e2d\u4e00\u689d\u7d00\u9304\u7684\u300c\u79df\u7d04\u300d\u3002\u5728\u79df\u7d04\u6709\u6548\u671f\u5167\uff0c\u905e\u8ff4\u89e3\u6790\u5668\u6703\u5f88\u6a02\u610f\u4e00\u76f4\u8fd4\u56de\u820a\u7b54\u6848\uff0c\u800c\u4e0d\u6703\u518d\u6b21\u8a62\u554f\u4f60\u7684\u6b0a\u5a01 DNS \u4f3a\u670d\u5668\u3002\u5728\u9077\u79fb\u5834\u666f\u4e2d\uff0c\u9019\u500b\u79df\u7d04\u5c31\u662f\u5feb\u901f\u6536\u6582\u7684\u6575\u4eba\uff1a\u9577\u79df\u7d04\u610f\u5473\u8457\u6709\u4e9b\u7528\u6236\u7aef\u6703\u5728\u5f88\u9577\u6642\u9593\u88e1\u7e7c\u7e8c\u89e3\u6790\u5230\u820a\u4f4d\u5740\u3002\u900f\u904e\u63d0\u524d\u628a TTL \u6536\u7e2e\u5230\u8f03\u5c0f\u7684\u6578\u503c\uff08\u901a\u5e38\u4e0d\u8d85\u904e 300 \u79d2\uff09\uff0c\u4f60\u6703\u8feb\u4f7f\u89e3\u6790\u5668\u66f4\u983b\u7e41\u5730\u91cd\u65b0\u6574\u7406\uff0c\u5f9e\u800c\u8b93\u4f7f\u7528\u8005\u6d41\u91cf\u7684\u5207\u63db\u66f4\u63a5\u8fd1\u4f60\u5be6\u969b\u7684\u5272\u63a5\u6642\u9593\u8996\u7a97\uff0c\u800c\u4e0d\u662f\u5728\u597d\u5e7e\u500b\u5c0f\u6642\u88e1\u96a8\u6a5f\u64f4\u6563\u3002([en.wikipedia.org](https:\/\/en.wikipedia.org\/wiki\/Time_to_live?utm_source=openai))\n  <\/p>\n<h2><strong>2. \u9077\u79fb\u904e\u7a0b\u4e2d DNS \u89e3\u6790\u7684\u771f\u5be6\u884c\u70ba<\/strong><\/h2>\n<\/h2>\n<p>\n    \u5f9e\u5354\u5b9a\u5c64\u9762\u770b\uff0c\u7db2\u7ad9\u9077\u79fb\u5c0d DNS \u4f86\u8aaa\u4e26\u6c92\u6709\u4ec0\u9ebc\u300c\u7279\u6b8a\u300d\u7684\u64cd\u4f5c\uff0c\u4f60\u53ea\u662f\u628a\u4e00\u689d A \u6216 AAAA \u7d00\u9304\u5f9e\u300c\u820a\u6e90\u7ad9\u300d\u6539\u6210\u300c\u65b0\u6e90\u7ad9\u300d\u3002\u8907\u96dc\u6027\u4f86\u81ea DNS \u9031\u908a\u7684\u751f\u614b\uff1a\u591a\u5c64\u5feb\u53d6\uff08\u700f\u89bd\u5668\u3001\u4f5c\u696d\u7cfb\u7d71 stub resolver\u3001\u672c\u5730\u5feb\u53d6\u89e3\u6790\u5668\u3001\u96fb\u4fe1\u696d\u8005\u53ca\u516c\u5171\u905e\u8ff4\u89e3\u6790\u5668\uff09\u3001\u5404\u5bb6\u4e0d\u540c\u7684\u5feb\u53d6\u7b56\u7565\uff0c\u9084\u6709\u4e00\u4e9b\u6703\u7121\u8996\u4f60\u7cbe\u5fc3\u8a2d\u5b9a TTL \u7684\u554f\u984c\u5be6\u4f5c\u3002\u5be6\u969b\u6548\u679c\u5c31\u662f\uff0c\u7576\u4f60\u4fee\u6539\u4f4d\u5740\u6642\uff0c\u7e3d\u6703\u6709\u4e00\u90e8\u5206\u7528\u6236\u7aef\u6eef\u5f8c\uff0c\u7e7c\u7e8c\u4f7f\u7528\u820a\u8cc7\u6599\u4e00\u6bb5\u6642\u9593\u3002([en.wikipedia.org](https:\/\/en.wikipedia.org\/wiki\/Domain_Name_System?utm_source=openai))\n  <\/p>\n<ul>\n<li>\u700f\u89bd\u5668\u53ef\u4ee5\u7368\u7acb\u65bc\u4f5c\u696d\u7cfb\u7d71\u5feb\u53d6 DNS \u56de\u61c9\u3002<\/li>\n<li>\u4f5c\u696d\u7cfb\u7d71\u7dad\u8b77\u81ea\u5df1\u7684\u89e3\u6790\u5feb\u53d6\u3002<\/li>\n<li>\u905e\u8ff4\u89e3\u6790\u5668\u6703\u70ba\u6210\u5343\u4e0a\u842c\u751a\u81f3\u4e0a\u767e\u842c\u4f7f\u7528\u8005\u805a\u5408\u8acb\u6c42\u3002<\/li>\n<li>\u6709\u4e9b\u89e3\u6790\u5668\u6703\u8986\u5beb TTL\uff0c\u6216\u628a TTL \u9650\u5236\u5728\u81ea\u5df1\u7684\u7b56\u7565\u8996\u7a97\u5167\u3002<\/li>\n<\/ul>\n<p>\n    \u4e00\u65e6\u4f60\u5728\u5730\u7406\u4e0a\u62c9\u958b\u8ddd\u96e2\u2014\u2014\u4f8b\u5982\u5f9e\u672c\u5730\u6a5f\u623f\u9077\u79fb\u5230\u65e5\u672c\u4f3a\u670d\u5668\u5340\u57df\u2014\u2014\u89e3\u6790\u5668\u7684\u5206\u5e03\u4ee5\u53ca\u5feb\u53d6\u884c\u70ba\u5c31\u6703\u66f4\u52a0\u7570\u8cea\u5316\uff1a\u6709\u7684\u7db2\u8def\u66f4\u65b0\u5f88\u5feb\uff0c\u6709\u7684\u5247\u6bd4\u4f60\u8a2d\u5b9a\u7684\u503c\u66f4\u9577\u6642\u9593\u5730\u4fdd\u7559\u9673\u820a\u7b54\u6848\u3002\u9019\u4e5f\u662f\u70ba\u4ec0\u9ebc\u5728\u5e7e\u4e4e\u6240\u6709\u56b4\u8085\u7684\u7db2\u7ad9\u9077\u79fb\u4f5c\u6230\u624b\u518a\u88e1\uff0c\u4e8b\u5148\u8abf\u512a TTL \u90fd\u662f\u5fc5\u5099\u6b65\u9a5f\u3002([dns.com](https:\/\/www.dns.com\/en\/supports\/2804.html?utm_source=openai))\n  <\/p>\n<h2><strong>3. \u5ffd\u7565\u9077\u79fb\u524d TTL \u8abf\u6574\u6703\u767c\u751f\u4ec0\u9ebc<\/strong><\/h2>\n<\/h2>\n<p>\n    \u6211\u5011\u4f86\u5efa\u6a21\u4e00\u4e0b\uff0c\u5982\u679c\u4f60\u4fdd\u6301\u300c\u6b63\u5e38\u751f\u7522\u74b0\u5883\u300d\u7684 TTL \u6578\u503c\u2014\u2014\u6bd4\u5982 3600 \u79d2\u30017200 \u79d2\u751a\u81f3\u6574\u6574\u4e00\u5929\u2014\u2014\u7136\u5f8c\u53ea\u662f\u5728\u9077\u79fb\u8996\u7a97\u88e1\u76f4\u63a5\u7de8\u8f2f\u7d00\u9304\uff0c\u6703\u51fa\u73fe\u54ea\u4e9b\u5931\u6557\u6a21\u5f0f\u3002\u9019\u4e9b\u60c5\u6cc1\u4e26\u4e0d\u662f\u7406\u8ad6\u63a8\u6f14\uff0c\u800c\u662f\u771f\u5be6\u5730\u51fa\u73fe\u5728\u5404\u5927\u670d\u52d9\u5546\u7684\u5de5\u55ae\u3001\u4e8b\u6545\u56de\u9867\u548c\u5fa9\u76e4\u5831\u544a\u88e1\u3002\n  <\/p>\n<ol>\n<li>\n      <strong>\u6d41\u91cf\u300c\u8166\u88c2\u300d<\/strong><br \/>\n      \u4e00\u90e8\u5206\u89e3\u6790\u5668\u5f88\u5feb\u62ff\u5230\u4e86\u65b0 IP\uff0c\u53e6\u4e00\u90e8\u5206\u5247\u6703\u5728\u5feb\u53d6\u904e\u671f\u524d\u4e00\u76f4\u8fd4\u56de\u820a\u7b54\u6848\u3002\u7d50\u679c\u5c31\u662f\u5927\u91cf\u771f\u5be6\u4f7f\u7528\u8005\u6d41\u91cf\u5728\u8f03\u9577\u4e00\u6bb5\u6642\u9593\u5167\uff0c\u540c\u6642\u6253\u5230\u820a\u53e2\u96c6\u548c\u65b0\u53e2\u96c6\u3002\u5982\u679c\u4f60\u7684\u61c9\u7528\u5b8c\u5168\u7121\u72c0\u614b\u3001\u8cc7\u6599\u540c\u6b65\u53c8\u505a\u5230\u6975\u81f4\uff0c\u9019\u53ef\u80fd\u9084\u80fd\u63a5\u53d7\u3002\u4f46\u591a\u6578\u771f\u5be6\u7cfb\u7d71\u81f3\u5c11\u90e8\u5206\u662f\u6709\u72c0\u614b\u7684\u2014\u2014\u5de5\u4f5c\u968e\u6bb5\u3001\u8cfc\u7269\u8eca\u3001\u8a2d\u5b9a\u3001\u65e5\u8a8c\u7b49\u7b49\u3002\n    <\/li>\n<li>\n      <strong>\u8cc7\u6599\u5206\u53c9\u8207\u300c\u5e7d\u9748\u5beb\u5165\u300d<\/strong><br \/>\n      \u7576\u9077\u79fb\u6d89\u53ca\u5132\u5b58\u6216\u8cc7\u6599\u5eab\u6642\uff0c\u5beb\u5165\u64cd\u4f5c\u53ef\u80fd\u6703\u540c\u6642\u843d\u5728\u5169\u500b\u8cc7\u6599\u4e2d\u5fc3\u3002\u5982\u679c\u65e5\u672c\u4f3a\u670d\u5668\u88ab\u8a2d\u5b9a\u70ba\u65b0\u7684\u6b0a\u5a01\u8cc7\u6599\u4f86\u6e90\uff0c\u800c\u820a\u57f7\u884c\u500b\u9ad4\u53c8\u6c92\u6709\u6301\u7e8c\u5411\u65b0\u57f7\u884c\u500b\u9ad4\u8907\u5beb\uff0c\u4f60\u5c31\u6703\u7522\u751f\u300c\u5e7d\u9748\u5beb\u5165\u300d\u2014\u2014\u4f7f\u7528\u8005\u8a8d\u70ba\u5df2\u7d93\u6210\u529f\u7684\u64cd\u4f5c\uff0c\u5be6\u969b\u4e0a\u6c38\u9060\u6c92\u6709\u9032\u5165\u6700\u7d42\u7684\u6b0a\u5a01\u8cc7\u6599\u96c6\u3002\n    <\/li>\n<li>\n      <strong>\u4f9d\u5730\u57df\u5283\u5206\u7684\u7570\u5e38<\/strong><br \/>\n      \u7531\u65bc DNS \u5feb\u53d6\u662f\u5206\u6563\u5f0f\u7684\uff0c\u4f60\u5f88\u5bb9\u6613\u9047\u5230\u9019\u6a23\u7684\u60c5\u6cc1\uff1a\u570b\u5167\u6d41\u91cf\u5df2\u7d93\u6253\u5230\u65b0\u6e90\u7ad9\uff0c\u800c\u6d77\u5916\u4f7f\u7528\u8005\u9084\u5728\u820a\u6e90\u7ad9\uff0c\u6216\u8005\u53cd\u904e\u4f86\u3002\u9664\u932f\u6642\u5c31\u6703\u9677\u5165\u60e1\u5922\uff1a\u4e00\u500b\u5730\u5340\u7684\u76e3\u63a7\u5168\u7da0\uff0c\u53e6\u4e00\u500b\u5730\u5340\u537b\u7b49\u65bc\u5728\u8dd1\u53e6\u4e00\u5957\u90e8\u7f72\u3002\n    <\/li>\n<li>\n      <strong>\u628a\u641c\u5c0b\u5f15\u64ce\u722c\u87f2\u641e\u660f<\/strong><br \/>\n      \u722c\u87f2\u672c\u8cea\u4e0a\u4e5f\u662f\u8eb2\u5728\u5927\u578b\u905e\u8ff4\u89e3\u6790\u5668\u5f8c\u9762\u7684\u7528\u6236\u7aef\u3002\u5728\u898f\u5283\u7cdf\u7cd5\u7684\u9077\u79fb\u904e\u7a0b\u4e2d\uff0c\u7d22\u5f15\u7cfb\u7d71\u53ef\u80fd\u6703\u4ea4\u66ff\u6293\u53d6\u4e0d\u540c\u7248\u672c\u7684\u5167\u5bb9\uff0c\u89c0\u5bdf\u5230\u4e0d\u4e00\u81f4\u7684 HTTP \u72c0\u614b\u78bc\uff0c\u6216\u8005\u770b\u5230\u820a\u7684\u91cd\u65b0\u5c0e\u5411\u3002\u5c0d\u65bc\u641c\u5c0b\u6392\u540d\u800c\u8a00\uff0c\u76f8\u8f03\u65bc\u5c0f\u5e45\u5ea6\u7684\u5ef6\u9072\u512a\u5316\uff0c\u300c\u7a69\u5b9a\u6027\u8a0a\u865f\u300d\u5f80\u5f80\u66f4\u91cd\u8981\u3002([dns.com](https:\/\/www.dns.com\/en\/supports\/2735.html?utm_source=openai))\n    <\/li>\n<\/ol>\n<p>\n    \u53ea\u8981\u5728\u5272\u63a5\u524d\u7684\u5e7e\u5c0f\u6642\u88e1\uff0c\u78ba\u4fdd\u5feb\u53d6\u8db3\u5920\u77ed\uff0c\u5c31\u53ef\u4ee5\u5927\u5e45\u964d\u4f4e\u6574\u985e\u554f\u984c\u51fa\u73fe\u7684\u6a5f\u7387\u3002\n  <\/p>\n<h2><strong>4. \u70ba\u4ec0\u9ebc\u8981\u63d0\u524d\u964d\u4f4e TTL\uff08\u800c\u4e0d\u662f\u6700\u5f8c\u4e00\u523b\uff09<\/strong><\/h2>\n<\/h2>\n<p>\n    \u964d\u4f4e TTL \u672c\u8eab\u4e5f\u662f\u4e00\u6b21 DNS \u8b8a\u66f4\uff0c\u800c\u5b83\u53ea\u6703\u5728\u65e2\u6709\u7684\u9ad8 TTL \u56de\u61c9\u81ea\u7136\u904e\u671f\u4e4b\u5f8c\u624d\u6703\u751f\u6548\u3002\u5982\u679c\u4f60\u76ee\u524d TTL \u662f 86400 \u79d2\uff0c\u537b\u5728\u9077\u79fb\u524d 5 \u5206\u9418\u624d\u628a\u5b83\u6539\u6210 300 \u79d2\uff0c\u591a\u6578\u89e3\u6790\u5668\u4f9d\u7136\u6703\u5805\u5b88\u5148\u524d\u62ff\u5230\u7684 86400 \u79d2\u79df\u7d04\u3002\u63db\u53e5\u8a71\u8aaa\uff0cTTL \u8b8a\u66f4\u4e0d\u662f\u300c\u8ffd\u6eaf\u751f\u6548\u300d\u7684\u3002\u6240\u4ee5\uff0c\u5927\u90e8\u5206\u7dad\u904b\u6307\u5f15\u624d\u6703\u5efa\u8b70\uff1a\u81f3\u5c11\u63d0\u524d\u4e00\u500b\u5b8c\u6574\u7684 TTL \u9031\u671f\uff0c\u751a\u81f3\u66f4\u65e9\uff0c\u5c31\u628a TTL \u964d\u4e0b\u4f86\u3002([en.wikipedia.org](https:\/\/en.wikipedia.org\/wiki\/Time_to_live?utm_source=openai))\n  <\/p>\n<ul>\n<li>\u5148\u6aa2\u67e5\u6240\u6709\u76f8\u95dc\u7d00\u9304\u76ee\u524d\u7684 TTL \u6578\u503c\u3002<\/li>\n<li>\u898f\u5283\u81f3\u5c11\u5728\u4e00\u500b\u5b8c\u6574 TTL \u8996\u7a97\u4e4b\u524d\u5c31\u628a\u5b83\u5011\u8abf\u4f4e\u3002<\/li>\n<li>\u9a57\u8b49\u5404\u985e\u89e3\u6790\u5668\u958b\u59cb\u9075\u5b88\u65b0\u7684\u3001\u66f4\u77ed\u7684 TTL \u503c\u3002<\/li>\n<\/ul>\n<p>\n    \u5728\u5be6\u52d9\u4e2d\uff0c\u5f88\u591a\u5718\u968a\u90fd\u6703\u628a\u300c\u9077\u79fb TTL\u300d\u6a19\u6e96\u5316\u70ba 300 \u79d2\u3002\u9019\u662f\u4e00\u500b\u76f8\u5c0d\u6298\u8877\u3001\u53c8\u53ef\u64cd\u4f5c\u7684\u6578\u503c\uff1a\u89e3\u6790\u5668\u91cd\u65b0\u6574\u7406\u8db3\u5920\u983b\u7e41\uff0c\u4f60\u80fd\u5728\u5e7e\u5206\u9418\u5167\u770b\u5230\u8fd1\u4e4e\u5168\u7403\u7684\u6536\u6582\uff0c\u540c\u6642\u53c8\u4e0d\u6703\u628a\u6b0a\u5a01 DNS \u4f3a\u670d\u5668\u58d3\u57ae\u3002\u96f2\u670d\u52d9\u5546\u548c DNS \u5ee0\u5546\u5728\u8ac7\u5230\u5272\u63a5\u968e\u6bb5\u6642\uff0c\u4e5f\u7d93\u5e38\u7d66\u51fa 60\u2013300 \u79d2\u9019\u6a23\u4e00\u500b\u5340\u9593\u3002([developers.cloudflare.com](https:\/\/developers.cloudflare.com\/learning-paths\/dns-best-practices\/concepts\/phase-2\/?utm_source=openai))\n  <\/p>\n<h2><strong>5. \u5177\u9ad4\u6578\u503c\u5efa\u8b70\uff1a\u964d\u5230\u591a\u4f4e\uff0c\u63d0\u524d\u591a\u4e45<\/strong><\/h2>\n<\/h2>\n<p>\n    \u5c0d\u65bc\u9077\u79fb\u5230\u65b0\u7684\u65e5\u672c\u4f3a\u670d\u5668\u53e2\u96c6\uff0c\u4f60\u53ef\u4ee5\u628a\u4e0b\u9762\u9019\u4e9b\u6578\u503c\u8996\u70ba\u300c\u6709\u5be6\u6230\u80cc\u66f8\u300d\u7684\u57fa\u7dda\uff0c\u800c\u4e0d\u662f\u62cd\u8166\u888b\u3002\u5b83\u5011\u7d9c\u5408\u53c3\u8003\u4e86\u5404\u5bb6\u71df\u904b\u5546\u516c\u958b\u7684\u5efa\u8b70\uff0c\u4e5f\u4f86\u81ea\u7b2c\u4e00\u7dda\u7d93\u9a57\u3002\n  <\/p>\n<ol>\n<li>\n      <strong>\u5e38\u898f\u751f\u7522\u74b0\u5883 TTL<\/strong><br \/>\n      \u591a\u6578\u7db2\u7ad9\u7684 TTL \u5728 1800\u20137200 \u79d2\u4e4b\u9593\u3002\u9019\u80fd\u78ba\u4fdd DNS \u67e5\u8a62\u91cf\u7dad\u6301\u5728\u4e00\u500b\u5408\u7406\u6c34\u5e73\uff0c\u540c\u6642\u5728\u9700\u8981\u6642\u9084\u80fd\u5728\u5e7e\u5c0f\u6642\u5167\u5b8c\u6210\u8b8a\u66f4\u3002\u9ad8\u5ea6\u975c\u614b\u7684\u7d00\u9304\u6709\u6642\u6703\u8a2d\u5f97\u66f4\u9ad8\u3002\n    <\/li>\n<li>\n      <strong>\u9077\u79fb\u524d TTL<\/strong><br \/>\n      \u5728\u6b63\u5f0f\u5272\u63a5\u524d\u81f3\u5c11 24\u201372 \u5c0f\u6642\uff0c\u5c07\u6838\u5fc3 Web \u8207 API \u7d00\u9304\u7684 TTL \u964d\u5230 300 \u79d2\uff0c\u6709\u6642\u662f 120 \u79d2\u3002\u300c72 \u5c0f\u6642\u300d\u7684\u505a\u6cd5\u70ba\u90a3\u4e9b\u6703\u5f37\u5236\u4fee\u6539 TTL \u6216\u91cd\u65b0\u6574\u7406\u504f\u6162\u7684\u89e3\u6790\u5668\u9810\u7559\u7de9\u885d\u3002([dns.com](https:\/\/www.dns.com\/en\/supports\/2804.html?utm_source=openai))\n    <\/li>\n<li>\n      <strong>\u9077\u79fb\u9032\u884c\u4e2d TTL<\/strong><br \/>\n      \u5728\u4f60\u78ba\u4fe1\u5927\u90e8\u5206\u6d41\u91cf\u5df2\u7d93\u6253\u5411\u65b0\u6e90\u7ad9\u3001\u7cfb\u7d71\u6307\u6a19\u7a69\u5b9a\u4e4b\u524d\uff0c\u4e00\u76f4\u7dad\u6301\u8f03\u77ed TTL\u3002\u6839\u64da\u6d41\u91cf\u6a21\u5f0f\u4e0d\u540c\uff0c\u9019\u6bb5\u6642\u9593\u53ef\u80fd\u662f\u6578\u5c0f\u6642\u5230\u6574\u6574\u4e00\u5929\u3002\n    <\/li>\n<li>\n      <strong>\u9077\u79fb\u7a69\u5b9a\u5f8c\u7684 TTL<\/strong><br \/>\n      \u4e00\u65e6\u4e00\u5207\u6062\u5fa9\u5230\u300c\u7121\u804a\u6a21\u5f0f\u300d\u2014\u2014\u300c\u7121\u804a\u300d\u5728\u7dad\u904b\u4e16\u754c\u88e1\u901a\u5e38\u662f\u597d\u4e8b\u2014\u2014\u5c31\u53ef\u4ee5\u628a TTL \u62c9\u56de\u8f03\u70ba\u4fdd\u5b88\u7684\u6578\u503c\uff0c\u4f8b\u5982 1800\u20133600 \u79d2\uff0c\u7528\u65bc\u9577\u671f\u904b\u884c\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u7576\u7136\uff0c\u4f60\u53ef\u4ee5\u6839\u64da\u81ea\u5df1\u7684\u6b0a\u5a01 DNS \u627f\u8f09\u80fd\u529b\u3001\u67e5\u8a62\u91cf\u4ee5\u53ca\u7dad\u904b\u6210\u719f\u5ea6\u5c0d\u9019\u4e9b\u6578\u5b57\u505a\u5fae\u8abf\u3002\u4f46\u6574\u9ad4\u7684\u5f62\u72c0\u2014\u2014\u7a69\u5b9a\u671f TTL \u8f03\u9ad8\uff0c\u8b8a\u66f4\u671f TTL \u8f03\u4f4e\u2014\u2014\u5f9e\u500b\u4eba\u5c08\u6848\u5230\u591a\u5340\u57df\u7684\u5927\u578b\u751f\u7522\u7cfb\u7d71\u90fd\u5f88\u9069\u7528\u3002([arxiv.org](https:\/\/arxiv.org\/abs\/1606.09530?utm_source=openai))\n  <\/p>\n<h2><strong>6. \u65e5\u672c\u4f3a\u670d\u5668\u5834\u666f\u7684\u7279\u6b8a\u8003\u91cf<\/strong><\/h2>\n<\/h2>\n<p>\n    \u628a\u696d\u52d9\u9077\u5165\u65e5\u672c\u4f3a\u670d\u5668\u5340\u57df\uff0c\u6703\u5e36\u4f86\u984d\u5916\u7684\u62d3\u64b2\u8207\u5ef6\u9072\u7dad\u5ea6\uff0c\u4f7f TTL \u898f\u5283\u7684\u91cd\u8981\u6027\u9032\u4e00\u6b65\u653e\u5927\u3002\u65e5\u672c\u4f4d\u65bc\u6771\u4e9e\u95dc\u9375\u4e92\u806f\u7bc0\u9ede\u4f4d\u7f6e\uff0c\u8a31\u591a\u672c\u5730 ISP \u81ea\u5efa\u905e\u8ff4\u89e3\u6790\u5668\uff0c\u4e26\u63a1\u7528\u5404\u81ea\u7684\u7b56\u7565\u3002\u96a8\u8457\u6d41\u91cf\u5f9e\u672c\u5730\u6216\u5176\u4ed6\u5340\u57df\u8cc7\u6599\u4e2d\u5fc3\u9077\u79fb\u5230\u6771\u4eac\u6216\u5927\u962a\u53ef\u7528\u5340\uff0c\u4f60\u4e0d\u50c5\u6539\u8b8a\u4e86\u5f80\u8fd4\u5ef6\u9072\uff0c\u4e5f\u6539\u8b8a\u4e86\u9810\u8a2d\u6703\u67e5\u8a62\u4f60\u7db2\u57df\u7684\u89e3\u6790\u5668\u7fa4\u9ad4\u3002([iij.ad.jp](https:\/\/www.iij.ad.jp\/en\/dev\/iir\/pdf\/iir_vol15_infra_EN.pdf?utm_source=openai))\n  <\/p>\n<ul>\n<li>\n      <strong>\u5340\u57df\u89e3\u6790\u5668\u7684\u81ea\u8a02 TTL \u7b56\u7565<\/strong><br \/>\n      \u4e00\u4e9b\u4e9e\u592a\u5730\u5340\u7684\u89e3\u6790\u5668\u6703\u628a\u6975\u4f4e\u7684 TTL \u5f37\u5236\u63d0\u5347\u5230\u4f8b\u5982 300 \u6216 600 \u79d2\u3002\u570d\u7e5e 300 \u79d2\u9019\u4e00\u4e0b\u9650\u4f86\u898f\u5283\u9810\u671f\uff0c\u6703\u66f4\u8cbc\u8fd1\u73fe\u5be6\u3002\n    <\/li>\n<li>\n      <strong>\u6df7\u5408\u5b58\u53d6\u6a21\u5f0f<\/strong><br \/>\n      \u65e5\u672c\u672c\u5730\u4f7f\u7528\u8005\u53ef\u80fd\u4e3b\u8981\u4f7f\u7528\u672c\u5730 ISP \u7684\u89e3\u6790\u5668\uff0c\u800c\u6d77\u5916\u4f7f\u7528\u8005\u5247\u66f4\u591a\u7d93\u7531\u5927\u578b\u516c\u5171\u89e3\u6790\u5668\u5b58\u53d6\u3002\u5169\u8005\u7684\u5feb\u53d6\u884c\u70ba\u548c\u50b3\u64ad\u53ef\u89c0\u6e2c\u6027\u622a\u7136\u4e0d\u540c\uff0c\u56e0\u6b64\u4f60\u9700\u8981\u5f9e\u591a\u500b\u63a2\u6e2c\u9ede\u3001\u591a\u500b\u5730\u5340\u4f86\u6301\u7e8c\u76e3\u63a7\u3002\n    <\/li>\n<li>\n      <strong>CDN \u8207\u591a CDN \u5c64<\/strong><br \/>\n      \u5982\u679c\u4f60\u5728\u65e5\u672c\u908a\u7de3\u7bc0\u9ede\u7d42\u6b62\u4f7f\u7528\u8005\u6d41\u91cf\uff0c\u4f46\u4ecd\u7136\u9700\u8981\u9077\u79fb\u6e90\u7ad9\uff0c\u5c31\u5fc5\u9808\u641e\u6e05\u695a CDN \u81ea\u8eab\u7684 DNS \u5c64\u662f\u5982\u4f55\u904b\u4f5c\u7684\u3002\u5927\u578b CDN \u5f80\u5f80\u4f9d\u8cf4\u975e\u5e38\u7a4d\u6975\u3001\u8d85\u4f4e TTL \u4f86\u505a\u5730\u7406\u8def\u7531\uff0c\u4f60\u4e0d\u5e0c\u671b\u6e90\u7ad9\u7684 DNS \u8b8a\u66f4\u7b56\u7565\u548c CDN \u7684\u8a2d\u8a08\u4e92\u76f8\u300c\u6253\u67b6\u300d\u3002([globaldots.com](https:\/\/www.globaldots.com\/wp-content\/uploads\/2022\/04\/GlobalDots-How-to-Evaluate-and-Implement-Multi-CDN-Strategy_.pdf?utm_source=openai))\n    <\/li>\n<\/ul>\n<p>\n    \u7d50\u5408\u9019\u4e9b\u56e0\u7d20\uff0c\u6700\u4e7e\u6de8\u7684\u6a21\u5f0f\u901a\u5e38\u662f\uff1a\u5c0d\u5916\u4fdd\u6301\u4f7f\u7528\u8005\u53ef\u898b\u7db2\u57df\u7a69\u5b9a\uff0c\u628a\u5b83\u6307\u5411\u65e5\u672c\u4e00\u500b\u884c\u70ba\u826f\u597d\u7684\u908a\u7de3\u5c64\u6216\u8ca0\u8f09\u5e73\u8861\u5c64\uff1b\u5728\u5167\u90e8\u518d\u7528\u5c08\u9580\u7684 DNS \u6216\u670d\u52d9\u767c\u73fe\u7db2\u57df\u4f86\u7ba1\u7406\u6e90\u7ad9\u9077\u79fb\uff0c\u4e26\u900f\u904e\u53ef\u8abf\u7bc0\u7684 TTL \u4f86\u7cbe\u7d30\u63a7\u5236\uff0c\u800c\u4e0d\u76f4\u63a5\u5f71\u97ff\u5916\u90e8\u7528\u6236\u7aef\u3002\n  <\/p>\n<h2><strong>7. \u9077\u79fb\u524d\u5230\u5e95\u8981\u4fee\u6539\u54ea\u4e9b\u7d00\u9304<\/strong><\/h2>\n<\/h2>\n<p>\n    \u4f60\u7684\u5340\u57df\u6a94\u88e1\u4e26\u4e0d\u662f\u6240\u6709\u7d00\u9304\u90fd\u61c9\u8a72\u5728\u9077\u79fb\u524d\u4e00\u5200\u5207\u5730\u964d\u4f4e TTL\u3002\u76ee\u6a19\u662f\uff1a\u5728\u76e1\u91cf\u6e1b\u5c11\u4f7f\u7528\u8005\u53ef\u898b\u4e2d\u65b7\u7684\u524d\u63d0\u4e0b\uff0c\u907f\u514d\u7121\u8b02\u5730\u653e\u5927 DNS \u67e5\u8a62\u91cf\uff0c\u4e5f\u907f\u514d\u8b93\u8207\u9077\u79fb\u7121\u95dc\u7684\u670d\u52d9\u88ab\u727d\u9023\u3002\n  <\/p>\n<ol>\n<li>\n      <strong>\u6838\u5fc3 Web \u5165\u53e3<\/strong><br \/>\n      \u6839\u7db2\u57df\u548c <code>www<\/code> \u4e3b\u6a5f\u540d\u7684 A \/ AAAA \u7d00\u9304\u3001\u5404\u4e3b\u61c9\u7528\u7db2\u57df\u4ee5\u53ca\u91cd\u8981 API \u7aef\u9ede\uff0c\u662f\u6700\u4e3b\u8981\u7684 TTL \u4e0b\u8abf\u76ee\u6a19\u3002\n    <\/li>\n<li>\n      <strong>\u652f\u6490\u578b\u61c9\u7528\u4e3b\u6a5f<\/strong><br \/>\n      \u7528\u65bc\u5f8c\u53f0\u7ba1\u7406\u3001\u5100\u8868\u677f\u4ee5\u53ca\u7d93\u7531\u516c\u7db2\u5b58\u53d6\u7684\u5167\u90e8\u5de5\u5177\u5b50\u7db2\u57df\uff0c\u4e5f\u5efa\u8b70\u4e00\u8d77\u52a0\u5165\u4f4e TTL \u968a\u5217\uff0c\u5c24\u5176\u662f\u5728\u5b83\u5011\u6703\u540c\u6b65\u9077\u79fb\u5230\u65b0\u7684\u65e5\u672c\u4f3a\u670d\u5668\u53e2\u96c6\u6642\u3002\n    <\/li>\n<li>\n      <strong>\u90f5\u4ef6\u8207 MX \u7d00\u9304<\/strong><br \/>\n      \u5982\u679c\u9077\u79fb\u904e\u7a0b\u4e2d\u90f5\u4ef6\u57fa\u790e\u8a2d\u65bd\u4e0d\u8b8a\uff0c\u5c31\u4e0d\u8981\u52d5 MX \u7684 TTL\u3002\u5982\u679c\u8981\u9077\u79fb\u90f5\u4ef6\u7cfb\u7d71\uff0c\u6700\u597d\u7368\u7acb\u898f\u5283\u90a3\u4e00\u5957\u9077\u79fb\uff1b\u90f5\u4ef6\u4f47\u5217\u548c\u91cd\u8a66\u6a5f\u5236\u6709\u81ea\u5df1\u7684\u4e00\u5957\u9810\u671f\u548c\u5931\u6557\u6a21\u5f0f\u3002([dns.com](https:\/\/www.dns.com\/en\/supports\/2735.html?utm_source=openai))\n    <\/li>\n<li>\n      <strong>TXT\u3001SPF \u548c DKIM<\/strong><br \/>\n      \u9a57\u8b49\u8207\u7b56\u7565\u985e\u7d00\u9304\u901a\u5e38\u4e0d\u6703\u53d7\u7d14 Web \u6e90\u7ad9\u9077\u79fb\u5f71\u97ff\uff0c\u56e0\u6b64\u4e00\u822c\u53ef\u4ee5\u7dad\u6301\u539f\u6709 TTL \u4e0d\u52d5\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u5728\u4fee\u6539\u4efb\u4f55\u6771\u897f\u4e4b\u524d\uff0c\u5148\u532f\u51fa\u5b8c\u6574\u7684\u5340\u57df\u6a94\uff0c\u4e26\u7d0d\u5165\u7248\u672c\u63a7\u5236\u3002\u5f88\u591a\u9077\u79fb\u4e8b\u6545\u4e26\u975e\u6e90\u65bc TTL \u932f\u914d\uff0c\u800c\u662f\u56e0\u70ba\u67d0\u500b\u300c\u4f4e\u5b58\u53d6\u91cf\u5b50\u7db2\u57df\u300d\u88ab\u907a\u5fd8\uff0c\u7d50\u679c\u5b83\u5be6\u969b\u4e0a\u80cc\u5f8c\u9023\u8457\u95dc\u9375\u6574\u5408\u3002\n  <\/p>\n<h2><strong>8. \u4f4e TTL \u9077\u79fb\u5230\u65e5\u672c\u4f3a\u670d\u5668\u7684\u5be6\u6230\u5287\u672c<\/strong><\/h2>\n<\/h2>\n<p>\n    \u4e0b\u9762\u662f\u4e00\u4efd\u7dad\u904b\u5de5\u7a0b\u5e2b\u53ef\u4ee5\u76f4\u63a5\u7167\u8457\u8d70\u7684\u6b65\u9a5f\u6e05\u55ae\u3002\u5047\u8a2d\u4f60\u8981\u628a\u73fe\u6709\u751f\u7522\u5de5\u4f5c\u8ca0\u8f09\uff0c\u5f9e\u4e00\u500b\u74b0\u5883\u9077\u79fb\u5230\u65b0\u7684\u65e5\u672c\u4f3a\u670d\u5668\u74b0\u5883\uff0c\u9019\u500b\u74b0\u5883\u53ef\u80fd\u662f\u4f60\u81ea\u5efa\uff0c\u4e5f\u53ef\u80fd\u662f\u7531\u63d0\u4f9b\u4f3a\u670d\u5668\u79df\u7528\u6216\u4f3a\u670d\u5668\u8a17\u7ba1\u670d\u52d9\u7684\u5ee0\u5546\u8a17\u7ba1\u3002\n  <\/p>\n<ol>\n<li>\n      <strong>T\u201372\uff5e48 \u5c0f\u6642\uff1a\u68b3\u7406\u4e26\u964d\u4f4e TTL<\/strong><\/p>\n<ul>\n<li>\u76e4\u9ede\u6240\u6709\u6307\u5411\u820a\u6e90\u7ad9\u7684 A\u3001AAAA \u548c CNAME \u7d00\u9304\u3002<\/li>\n<li>\u5c07\u5b83\u5011\u7684 TTL \u964d\u5230\u7d04 300 \u79d2\uff08\u6216\u4f60\u7684\u670d\u52d9\u5546\u5141\u8a31\u7684\u6700\u5c0f\u503c\uff09\u3002<\/li>\n<li>\u4f7f\u7528 <code>dig<\/code> \u548c <code>nslookup<\/code> \u5c0d\u591a\u500b\u516c\u5171\u89e3\u6790\u5668\u67e5\u8a62\uff0c\u78ba\u8a8d\u65b0 TTL \u5df2\u51fa\u73fe\u5728\u56de\u61c9\u88e1\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n      <strong>T\u201348\uff5e24 \u5c0f\u6642\uff1a\u5efa\u7f6e\u65b0\u74b0\u5883<\/strong><\/p>\n<ul>\n<li>\u5728\u65e5\u672c\u4f3a\u670d\u5668\u5340\u57df\u4e2d\u6e96\u5099\u597d\u904b\u7b97\u3001\u5132\u5b58\u548c\u7db2\u8def\u8cc7\u6e90\u3002<\/li>\n<li>\u540c\u6b65\u7a0b\u5f0f\u78bc\u3001\u8cc7\u6599\u548c\u8a2d\u5b9a\uff0c\u78ba\u4fdd\u65b0\u820a\u74b0\u5883\u8a9e\u610f\u4e00\u81f4\u3002<\/li>\n<li>\u67b6\u8a2d\u76e3\u63a7\uff0c\u80fd\u5920\u5340\u5206\u6253\u5230\u820a\u6e90\u7ad9\u548c\u65b0\u6e90\u7ad9\u7684\u6d41\u91cf\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n      <strong>T\u201324\uff5e4 \u5c0f\u6642\uff1a\u9a57\u8b49\u8207\u9810\u6f14<\/strong><\/p>\n<ul>\n<li>\u900f\u904e hosts \u6a94\u8986\u5beb\u6216\u96d9\u7dda DNS \u7684\u65b9\u5f0f\uff0c\u5f9e\u6307\u5b9a\u7528\u6236\u7aef\u5b58\u53d6\u65b0\u6e90\u7ad9\u3002<\/li>\n<li>\u5c0d\u65e5\u672c\u74b0\u5883\u9032\u884c\u7159\u9727\u6e2c\u8a66\u548c\u58d3\u529b\u6e2c\u8a66\u3002<\/li>\n<li>\u78ba\u8a8d\u65e5\u8a8c\u3001\u6307\u6a19\u548c\u93c8\u8def\u8ffd\u8e64\u90fd\u6b63\u5e38\u904b\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n      <strong>T\u20131 \u5c0f\u6642\uff1a\u51cd\u7d50\u9ad8\u98a8\u96aa\u8b8a\u66f4<\/strong><\/p>\n<ul>\n<li>\u5982\u679c\u61c9\u7528\u6709\u72c0\u614b\uff0c\u63d0\u524d\u516c\u544a\u5167\u5bb9\u51cd\u7d50\u6216\u7dad\u8b77\u8996\u7a97\u3002<\/li>\n<li>\u505a\u4e00\u6b21\u6700\u7d42\u5099\u4efd\uff0c\u4e26\u9a57\u8b49\u78ba\u5be6\u53ef\u4ee5\u9084\u539f\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n      <strong>\u5272\u63a5\u6642\u523b\uff1a\u5207\u63db DNS<\/strong><\/p>\n<ul>\n<li>\u5c07 A\/AAAA\/CNAME \u76ee\u6a19\u66f4\u65b0\u70ba\u65e5\u672c\u4f3a\u670d\u5668\u6216\u5176\u524d\u7aef\u8ca0\u8f09\u5e73\u8861\u4f4d\u5740\u3002<\/li>\n<li>\u5f9e\u591a\u500b\u89e3\u6790\u5668\u6301\u7e8c\u67e5\u8a62 DNS \u7b54\u6848\uff0c\u7b49\u5f85\u5b83\u5011\u5168\u90e8\u8fd4\u56de\u65b0 IP\u3002<\/li>\n<li>\u900f\u904e\u65e5\u8a8c\u8207\u5206\u6790\u7cfb\u7d71\u5373\u6642\u89c0\u5bdf\u6d41\u91cf\u5207\u63db\u60c5\u6cc1\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n      <strong>\u5272\u63a5\u5f8c\uff1a\u89c0\u5bdf\u4e26\u7dad\u6301<\/strong><\/p>\n<ul>\n<li>\u5728\u89c0\u5bdf\u5de5\u4f5c\u968e\u6bb5\u3001\u5ef6\u9072\u548c\u932f\u8aa4\u7387\u7570\u5e38\u7684\u9019\u6bb5\u6642\u9593\u88e1\uff0c\u7e7c\u7e8c\u7dad\u6301\u4f4e TTL\u3002<\/li>\n<li>\u5982\u679c\u51fa\u73fe\u56b4\u91cd\u554f\u984c\uff0c\u4f9d\u7136\u53ef\u4ee5\u900f\u904e\u518d\u6b21\u4fee\u6539 DNS \u5feb\u901f\u628a\u6d41\u91cf\u5207\u56de\u820a\u74b0\u5883\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n      <strong>T+24\uff5e48 \u5c0f\u6642\uff1a\u518d\u6b21\u63d0\u9ad8 TTL<\/strong><\/p>\n<ul>\n<li>\u7576\u65b0\u7684\u65e5\u672c\u90e8\u7f72\u5df2\u7d93\u300c\u7121\u804a\u4e14\u7a69\u5b9a\u300d\uff0c\u628a TTL \u8abf\u56de\u6b63\u5e38\u503c\u3002<\/li>\n<li>\u5728\u78ba\u4fe1\u6c92\u6709\u91cd\u8981\u6d41\u91cf\u518d\u6253\u5230\u820a\u74b0\u5883\u5f8c\uff0c\u518d\u8003\u616e\u4e0b\u7dda\u6216\u56de\u6536\u820a\u8cc7\u6e90\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\n    \u9019\u7a2e\u6d41\u7a0b\u8207\u773e\u591a DNS \u8207\u9077\u79fb\u6307\u5f15\u7684\u5efa\u8b70\u9ad8\u5ea6\u4e00\u81f4\uff1a\u63d0\u524d\u964d\u4f4e TTL\uff0c\u5145\u5206\u6e96\u5099\u65b0\u4f3a\u670d\u5668\uff0c\u5207\u63db\u7d00\u9304\uff0c\u7136\u5f8c\u8010\u5fc3\u89c0\u6e2c\u3002([dns.com](https:\/\/www.dns.com\/en\/supports\/2804.html?utm_source=openai))\n  <\/p>\n<h2><strong>9. \u9762\u5411\u6975\u5ba2\u7684\u5de5\u5177\u8207\u9664\u932f\u6280\u5de7<\/strong><\/h2>\n<\/h2>\n<p>\n    \u65e2\u7136\u8b80\u8005\u662f\u6280\u8853\u4eba\u54e1\uff0c\u6211\u5011\u5c31\u7a0d\u5fae\u591a\u8d70\u4e00\u6b65\uff0c\u770b\u4e00\u770b\u6709\u54ea\u4e9b\u76e3\u63a7\u8207\u9664\u932f\u6280\u5de7\uff0c\u53ef\u4ee5\u5e6b\u52a9\u4f60\u770b\u6e05 DNS \u8b8a\u66f4\u5728\u771f\u5be6\u74b0\u5883\u4e2d\u7684\u50b3\u64ad\u60c5\u6cc1\u3002\n  <\/p>\n<ul>\n<li>\n      <strong>\u76f4\u63a5\u300c\u8a62\u554f\u300d\u89e3\u6790\u5668<\/strong><br \/>\n      \u4f7f\u7528 <code>dig @resolver-ip yourdomain.com A<\/code> \u4f86\u67e5\u8a62\u6307\u5b9a\u905e\u8ff4\u89e3\u6790\u5668\u2014\u2014\u5305\u62ec 1.1.1.1\u30018.8.8.8 \u9019\u985e\u516c\u5171\u89e3\u6790\u5668\uff0c\u4ee5\u53ca\u76e1\u53ef\u80fd\u591a\u7684\u65e5\u672c\u672c\u5730\u96fb\u4fe1\u696d\u8005\u89e3\u6790\u5668\u3002\u5c0d\u6bd4\u8fd4\u56de\u7684 TTL \u548c IP\uff0c\u770b\u770b\u4e0d\u540c\u5730\u9ede\u7684\u5dee\u7570\u3002\n    <\/li>\n<li>\n      <strong>\u7d66\u908a\u7de3\u5c64\u6253\u4e0a\u6a19\u7c64<\/strong><br \/>\n      \u5728\u820a\u74b0\u5883\u548c\u65b0\u74b0\u5883\u4e2d\uff0c\u900f\u904e\u61c9\u7528\u65e5\u8a8c\u6216 HTTP \u6a19\u982d\u6253\u4e0a\u4e0d\u540c\u6a19\u8a18\u3002\u5206\u6790\u54ea\u4e9b\u4f86\u6e90 IP\u3001\u570b\u5bb6\u6216 ASN \u5728\u5272\u63a5\u5f8c\u4ecd\u7136\u6253\u5230\u820a\u53e2\u96c6\u3002\n    <\/li>\n<li>\n      <strong>\u5229\u7528\u5916\u90e8\u63a2\u91dd<\/strong><br \/>\n      \u4f7f\u7528\u5206\u6563\u5f0f\u76e3\u63a7\u670d\u52d9\uff0c\u6216\u81ea\u5efa\u591a\u500b VPS \u63a2\u91dd\u7bc0\u9ede\uff0c\u5f9e\u4e0d\u540c\u5730\u5340\u6301\u7e8c\u89e3\u6790\u7db2\u57df\u4e26\u5b58\u53d6 HTTP \u7aef\u9ede\uff0c\u8ffd\u8e64\u5168\u7403\u56de\u61c9\u6536\u6582\u901f\u5ea6\u3002\n    <\/li>\n<li>\n      <strong>\u89c0\u5bdf\u89e3\u6790\u5668 TTL \u5012\u6578<\/strong><br \/>\n      \u5c0d\u540c\u4e00\u500b\u89e3\u6790\u5668\u53cd\u8986\u67e5\u8a62\uff0c\u4f60\u53ef\u4ee5\u770b\u5230 TTL \u5982\u4f55\u4e00\u9ede\u9ede\u5012\u6578\u8a08\u6642\u3002\u7576\u4f60\u89c0\u5bdf\u5230\u5b83\u5f9e\u4f60\u8a2d\u5b9a\u7684\u65b0\u4f4e\u503c\u958b\u59cb\u5012\u6578\uff0c\u8aaa\u660e\u8a72\u89e3\u6790\u5668\u7684\u820a\u9ad8 TTL \u79df\u7d04\u5df2\u7d93\u5168\u90e8\u904e\u671f\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u5c0d\u65bc\u8d85\u5927\u898f\u6a21\u90e8\u7f72\uff0c\u4e00\u4e9b\u71df\u904b\u8005\u751a\u81f3\u6703\u6839\u64da TTL \u6578\u503c\u5efa\u6a21\u9810\u671f\u4f3a\u670d\u5668\u8ca0\u8f09\uff0c\u4ee5\u78ba\u4fdd\u6b0a\u5a01 DNS \u5728\u7e2e\u77ed TTL \u6642\u4e0d\u6703\u88ab\u58d3\u57ae\u3002\u5b78\u8853\u7814\u7a76\u4e5f\u986f\u793a\uff0c\u900f\u904e\u7cbe\u7d30\u8abf\u6574\uff0c\u5b8c\u5168\u53ef\u4ee5\u5728\u4e0d\u628a\u6b0a\u5a01\u4f3a\u670d\u5668\u6253\u7206\u7684\u524d\u63d0\u4e0b\uff0c\u5728\u5feb\u53d6\u6548\u7387\u548c\u9077\u79fb\u5f48\u6027\u4e4b\u9593\u53d6\u5f97\u8f03\u597d\u5e73\u8861\u3002([arxiv.org](https:\/\/arxiv.org\/abs\/1606.09530?utm_source=openai))\n  <\/p>\n<h2><strong>10. SEO \u8207\u4f7f\u7528\u8005\u9ad4\u9a57\uff1a\u7dad\u904b\u6c7a\u7b56\u5982\u4f55\u5f71\u97ff\u6392\u540d<\/strong><\/h2>\n<\/h2>\n<p>\n    \u641c\u5c0b\u512a\u5316\u9060\u4e0d\u53ea\u662f\u5f8c\u8a2d\u8cc7\u6599\u548c schema \u6a19\u8a3b\u90a3\u9ebc\u7c21\u55ae\uff1b\u641c\u5c0b\u5f15\u64ce\u5c0d\u4e0a\u7dda\u7387\u548c\u4e00\u81f4\u6027\u6975\u5176\u654f\u611f\u3002\u4e00\u5834\u898f\u5283\u7cdf\u7cd5\u3001TTL \u904e\u9577\u7684\u7db2\u7ad9\u9077\u79fb\uff0c\u6703\u5728\u65e5\u8a8c\u88e1\u7559\u4e0b\u9593\u6b47\u6027\u7576\u6a5f\u3001\u9023\u7dda\u6642\u9593\u7570\u5e38\u62c9\u9577\u6216\u56de\u61c9\u7d50\u679c\u4e0d\u4e00\u81f4\u7684\u6a21\u5f0f\uff0c\u800c\u641c\u5c0b\u5f15\u64ce\u6703\u5c07\u9019\u4e9b\u8996\u70ba\u54c1\u8cea\u554f\u984c\u3002\n  <\/p>\n<ul>\n<li>\n      <strong>\u6e1b\u5c11\u77ac\u6642\u932f\u8aa4<\/strong><br \/>\n      \u5982\u679c\u4f7f\u7528\u8005\u6216\u722c\u87f2\u5728\u820a\u6e90\u7ad9\u5df2\u7d93\u534a\u4e0b\u7dda\u4e4b\u5f8c\u4ecd\u7136\u6253\u5230\u5b83\uff0c\u53ef\u80fd\u6703\u770b\u5230 500 \u932f\u8aa4\u3001\u4e0d\u5b8c\u6574\u5167\u5bb9\u6216\u904e\u671f\u7684\u91cd\u65b0\u5c0e\u5411\u3002\n    <\/li>\n<li>\n      <strong>\u66f4\u5feb\u50b3\u64ad\u898f\u7bc4\u7248\u672c\u5167\u5bb9<\/strong><br \/>\n      \u8f03\u4f4e TTL \u80fd\u8b93\u722c\u87f2\u66f4\u5feb\u5b58\u53d6\u5230\u65e5\u672c\u65b0\u90e8\u7f72\uff0c\u5305\u62ec\u4f60\u5728\u9019\u6b21\u9077\u79fb\u4e2d\u9806\u5e36\u4e0a\u7dda\u7684\u6548\u80fd\u512a\u5316\u6216\u67b6\u69cb\u91cd\u69cb\u3002\n    <\/li>\n<li>\n      <strong>\u7a69\u5b9a\u6027\u4f5c\u70ba\u6392\u540d\u8a0a\u865f<\/strong><br \/>\n      \u9577\u671f\u4f86\u770b\uff0c\u66f4\u5c11\u7684\u65b7\u7dda\u548c\u91cd\u8a66\u610f\u5473\u8457\u66f4\u4f4e\u7684\u8df3\u51fa\u7387\u4ee5\u53ca\u66f4\u5065\u5eb7\u7684\u4f7f\u7528\u8005\u884c\u70ba\u8f2a\u5ed3\uff0c\u800c\u9019\u4e9b\u6703\u9593\u63a5\u5730\u5f37\u5316\u641c\u5c0b\u8868\u73fe\u3002([dns.com](https:\/\/www.dns.com\/en\/supports\/2735.html?utm_source=openai))\n    <\/li>\n<\/ul>\n<p>\n    \u7c21\u800c\u8a00\u4e4b\uff0c\u6b63\u78ba\u898f\u5283 TTL \u662f\u6280\u8853 SEO \u885b\u751f\u7684\u4e00\u90e8\u5206\uff1a\u5b83\u6703\u5728\u4f60\u9032\u884c\u91cd\u5927\u57fa\u790e\u8a2d\u65bd\u8b8a\u66f4\u6642\uff0c\u76f4\u63a5\u522a\u9664\u4e00\u6574\u985e\u53ef\u4ee5\u907f\u514d\u7684\u96dc\u8a0a\u3002\n  <\/p>\n<h2><strong>11. \u9077\u79fb\u5230\u65e5\u672c\u4f3a\u670d\u5668\u7684\u793a\u4f8b\u67b6\u69cb<\/strong><\/h2>\n<\/h2>\n<p>\n    \u70ba\u4e86\u8b93\u9019\u4e9b\u5167\u5bb9\u4e0d\u90a3\u9ebc\u62bd\u8c61\uff0c\u6211\u5011\u4f86\u770b\u4e00\u500b\u5178\u578b\u67b6\u69cb\uff1a\u4e00\u500b\u516c\u7db2\u7db2\u57df\u3001\u4e00\u5c64\u8ca0\u8f09\u5e73\u8861\u3001\u591a\u53f0\u61c9\u7528\u4f3a\u670d\u5668\u548c\u4e00\u5957\u8a17\u7ba1\u8cc7\u6599\u5eab\u3002\u4f60\u8981\u5f9e\u4e00\u500b\u5340\u57df\u9077\u79fb\u5230\u53e6\u4e00\u500b\u5340\u57df\uff0c\u65b0\u7684\u5340\u57df\u7531\u63d0\u4f9b\u65e5\u672c\u4f3a\u670d\u5668\u79df\u7528\u548c\u4f3a\u670d\u5668\u8a17\u7ba1\u670d\u52d9\u7684\u5ee0\u5546\u652f\u6490\u3002\n  <\/p>\n<ul>\n<li><strong>\u5916\u90e8 DNS<\/strong> \u5c07 <code>app.example.com<\/code> \u6307\u5411\u8ca0\u8f09\u5e73\u8861\u5668\u3002<\/li>\n<li><strong>\u8ca0\u8f09\u5e73\u8861<\/strong> \u5c07\u6d41\u91cf\u5206\u767c\u5230\u591a\u53f0\u61c9\u7528\u7bc0\u9ede\u3002<\/li>\n<li><strong>\u8cc7\u6599\u5eab<\/strong> \u8907\u88fd\u5230\u65e5\u672c\u7684\u65b0\u57f7\u884c\u500b\u9ad4\u3002<\/li>\n<li><strong>\u975c\u614b\u8cc7\u6e90<\/strong> \u7f6e\u65bc\u81ea\u5e36 DNS \u908f\u8f2f\u7684 CDN \u4e4b\u5f8c\u3002<\/li>\n<\/ul>\n<p>\n    \u5728\u9019\u6a23\u7684\u5834\u666f\u88e1\uff0c\u4f60\u5f80\u5f80\u53ef\u4ee5\u5728\u7b2c\u4e00\u968e\u6bb5\u907f\u514d\u76f4\u63a5\u4fee\u6539\u4f7f\u7528\u8005\u53ef\u898b\u7684\u7db2\u57df\u3002\u66f4\u597d\u7684\u505a\u6cd5\u662f\uff1a\n  <\/p>\n<ol>\n<li>\u5148\u5728\u65e5\u672c\u642d\u597d\u4e00\u5957\u5e73\u884c\u5806\u758a\uff0c\u4f7f\u7528\u7368\u7acb\u7684\u5167\u90e8\u4e3b\u6a5f\u540d\u3002<\/li>\n<li>\u5728\u5916\u90e8\u540d\u7a31\u4ecd\u7136\u7dad\u6301\u9ad8 TTL \u6642\uff0c\u540c\u6b65\u4e26\u7dad\u6301\u8cc7\u6599\u4e00\u81f4\u3002<\/li>\n<li>\u63d0\u524d\u53ea\u5c0d\u5916\u90e8\u8ca0\u8f09\u5e73\u8861\u540d\u7a31\u964d\u4f4e TTL\u3002<\/li>\n<li>\u5272\u63a5\u6642\uff0c\u5c07\u9019\u689d\u7d00\u9304\u6539\u6307\u5411\u65e5\u672c\u7684\u8ca0\u8f09\u5e73\u8861\u3002<\/li>\n<li>\u5982\u6709\u9700\u8981\uff0c\u53ef\u4ee5\u900f\u904e\u8ca0\u8f09\u5e73\u8861\u7b56\u7565\u6f38\u9032\u5730\u63d0\u9ad8\u65e5\u672c\u6d41\u91cf\u5360\u6bd4\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027 DNS \u7ffb\u8f49\u5168\u90e8\u6d41\u91cf\u3002<\/li>\n<\/ol>\n<p>\n    \u9019\u6a23\u53ef\u4ee5\u986f\u8457\u7e2e\u5c0f\u7206\u70b8\u534a\u5f91\uff1a\u4f60\u53ea\u9700\u8981\u5728\u4e00\u500b\u4e2d\u5fc3\u8def\u7531\u6c7a\u7b56\u9ede\u4e0a\u505a\u9078\u64c7\uff0c\u4e26\u7528\u4e00\u500b\u7cbe\u5fc3\u8a2d\u5b9a\u7684 TTL \u548c\u6e05\u6670\u7684\u56de\u5fa9\u8def\u5f91\u4f86\u4fdd\u8b77\u5b83\uff0c\u800c\u4e0d\u662f\u540c\u6642\u64cd\u4f5c\u4e00\u6574\u7247\u7d00\u9304\u77e9\u9663\u3002\n  <\/p>\n<h2><strong>12. \u7528\u5716\u50cf\u5316\u8996\u89d2\u7406\u89e3\uff1a\u5f9e\u9577 TTL \u6df7\u4e82\u5230\u77ed TTL \u53ef\u63a7<\/strong><\/h2>\n<\/h2>\n<p>\n    \u4e00\u500b\u7c21\u55ae\u7684\u5fc3\u667a\u5716\u53ef\u4ee5\u5e6b\u4f60\u52a0\u6df1\u76f4\u89ba\u3002\u60f3\u50cf\u5169\u689d\u76f8\u4e92\u4ea4\u53c9\u7684\u66f2\u7dda\uff1a\u4e00\u689d\u4ee3\u8868\u4ecd\u7136\u6253\u5230\u820a\u6e90\u7ad9\u7684\u6d41\u91cf\uff0c\u53e6\u4e00\u689d\u4ee3\u8868\u6253\u5230\u65e5\u672c\u65b0\u6e90\u7ad9\u7684\u6d41\u91cf\uff0c\u6a6b\u8ef8\u662f\u6642\u9593\u3002\n  <\/p>\n<p>\n    <img decoding=\"async\" src=\"japan-server-migration-dns-ttl.png\" alt=\"\u5c55\u793a\u7db2\u7ad9\u9077\u79fb\u5230\u65e5\u672c\u4f3a\u670d\u5668\u6642\uff0cDNS TTL \u8abf\u6574\u4e0b\u820a\u6e90\u7ad9\u548c\u65b0\u6e90\u7ad9\u6d41\u91cf\u4ea4\u53c9\u904e\u7a0b\u7684\u6d41\u91cf\u66f2\u7dda\u793a\u610f\u5716\" \/>\n  <\/p>\n<p>\n    \u5728\u975e\u5e38\u9577\u7684 TTL \u4e0b\uff0c\u9019\u5169\u689d\u7dda\u4ea4\u53c9\u5f97\u53c8\u6162\u53c8\u4e82\uff1a\u6709\u7684\u7528\u6236\u7aef\u5f88\u65e9\u5207\u63db\uff0c\u6709\u7684\u5f88\u665a\u624d\u5207\u63db\uff0c\u4ea4\u758a\u5340\u57df\u975e\u5e38\u5bec\u3002\u800c\u5728\u7cbe\u5fc3\u898f\u5283\u3001\u5728\u5272\u63a5\u524d\u5f8c\u6578\u5c0f\u6642\u5167\u4f7f\u7528\u8f03\u77ed TTL \u7684\u60c5\u6cc1\u4e0b\uff0c\u4ea4\u53c9\u6703\u8b8a\u5f97\u5f88\u9661\uff1a\u5927\u90e8\u5206\u4f7f\u7528\u8005\u6703\u5728\u4e00\u500b\u7dca\u6e4a\u8996\u7a97\u5167\u5b8c\u6210\u9077\u79fb\uff0c\u4ea4\u758a\u5340\u57df\u986f\u8457\u6536\u7a84\u3002\u4f60\u4ecd\u7136\u9700\u8981\u8655\u7406\u6975\u5c11\u6578\u300c\u6f0f\u7db2\u4e4b\u9b5a\u300d\uff0c\u4f46\u5b83\u5011\u5c07\u6210\u70ba\u4f8b\u5916\uff0c\u800c\u4e0d\u662f\u5e38\u614b\u3002\n  <\/p>\n<h2><strong>13. \u4e0b\u6b21\u9077\u79fb\u524d\u7684\u7d42\u6975\u6aa2\u67e5\u6e05\u55ae<\/strong><\/h2>\n<\/h2>\n<p>\n    \u6700\u5f8c\uff0c\u6211\u5011\u6574\u7406\u4e00\u4efd\u4f60\u53ef\u4ee5\u76f4\u63a5\u5957\u7528\u5728\u65e5\u672c\u4f3a\u670d\u5668\u9077\u79fb\u4e2d\u7684\u7dad\u904b\u6aa2\u67e5\u6e05\u55ae\uff1a\n  <\/p>\n<ul>\n<li>\u532f\u51fa\u3001\u6587\u4ef6\u5316\u4e26\u7528\u7248\u672c\u63a7\u5236\u7ba1\u7406\u5b8c\u6574 DNS \u5340\u57df\u6a94\u3002<\/li>\n<li>\u660e\u78ba\u54ea\u4e9b\u7d00\u9304\u5fc5\u9808\u96a8\u61c9\u7528\u4e00\u8d77\u9077\u79fb\u3002<\/li>\n<li>\u63d0\u524d 24\u201372 \u5c0f\u6642\u70ba\u9019\u4e9b\u7d00\u9304\u964d\u4f4e TTL\u3002<\/li>\n<li>\u5728\u7368\u7acb\u74b0\u5883\u4e2d\u5efa\u7f6e\u4e26\u9a57\u8b49\u65b0\u74b0\u5883\u2014\u2014\u4e0d\u8981\u4f9d\u8cf4\u7dda\u4e0a\u6d41\u91cf\u4f86\u6e2c\u8a66\u3002<\/li>\n<li>\u5728\u5272\u63a5\u524d\u51cd\u7d50\u9ad8\u98a8\u96aa\u8b8a\u66f4\uff0c\u4e26\u505a\u597d\u53ef\u9084\u539f\u7684\u5099\u4efd\u3002<\/li>\n<li>\u53ea\u5728\u65b0\u74b0\u5883\u5df2\u5c31\u7dd2\u4e14\u53d7\u76e3\u63a7\u7684\u524d\u63d0\u4e0b\u5207\u63db DNS\u3002<\/li>\n<li>\u7dca\u76ef\u6d41\u91cf\u5206\u4f48\u3001\u89e3\u6790\u5668\u884c\u70ba\u548c\u61c9\u7528\u6307\u6a19\u3002<\/li>\n<li>\u5728\u78ba\u4fe1\u9077\u79fb\u5fb9\u5e95\u5b8c\u6210\u524d\uff0c\u4fdd\u7559\u820a\u74b0\u5883\u7684\u552f\u8b80\u6216\u5099\u63f4\u89d2\u8272\u3002<\/li>\n<li>\u7cfb\u7d71\u7a69\u5b9a\u5f8c\u518d\u628a TTL \u8abf\u56de\u66f4\u9069\u5408\u9577\u671f\u904b\u884c\u7684\u6578\u503c\uff0c\u4ee5\u5e73\u8861\u67e5\u8a62\u8ca0\u8f09\u548c\u5f48\u6027\u3002<\/li>\n<\/ul>\n<p>\n    \u53ea\u8981\u4f60\u4e0d\u518d\u628a DNS TTL \u7576\u6210\u4e00\u500b\u975c\u614b\u8a2d\u5b9a\u9805\uff0c\u800c\u662f\u7576\u4f5c\u63a7\u5236\u9077\u79fb\u52d5\u529b\u5b78\u7684\u7cbe\u7d30\u65cb\u9215\uff0c\u90a3\u9ebc\u5207\u63db\u5230\u65e5\u672c\u4f3a\u670d\u5668\u5c31\u6703\u8b8a\u5f97\u53ef\u9810\u6e2c\u5f97\u591a\u3002\u5c0d\u65bc\u71df\u904b\u6216\u4f7f\u7528\u4f3a\u670d\u5668\u79df\u7528\u3001\u4f3a\u670d\u5668\u8a17\u7ba1\u5e73\u53f0\u7684\u5de5\u7a0b\u5e2b\u4f86\u8aaa\uff0c\u826f\u597d\u7684 TTL \u885b\u751f\u7fd2\u6163\u3001\u56b4\u8b39\u7684\u5206\u968e\u6bb5\u90e8\u7f72\u548c\u300c\u5f37\u8feb\u75c7\u7d1a\u5225\u300d\u7684\u53ef\u89c0\u6e2c\u6027\uff0c\u80fd\u628a\u4e00\u6b21\u9ad8\u98a8\u96aa\u7684\u5348\u591c\u9077\u79fb\uff0c\u8b8a\u6210\u4e00\u5834\u5e7e\u4e4e\u7121\u804a\u5230\u8b93\u4eba\u6253\u54c8\u6b20\u7684\u5e38\u898f\u8b8a\u66f4\u3002\u800c\u53ea\u8981\u4f60\u5728\u898f\u5283\u6642\u8a18\u5f97\u9019\u4e00\u4e32\u95dc\u9375\u5b57\uff1aDNS \u7de9\u5b58 TTL\uff5c\u7db2\u7ad9\u9077\u79fb\u81f3\u65e5\u672c\u4f3a\u670d\u5668\uff5c\u96f6\u505c\u6a5f\u8a17\u7ba1\u8207\u6a5f\u623f\u8a17\u7ba1\u670d\u52d9\uff0c\u4f60\u5c31\u6703\u59cb\u7d42\u805a\u7126\u5728\u6700\u95dc\u9375\u7684\u90a3\u4e9b\u8b8a\u6578\u4e0a\u3002\n  <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u679c\u4f60\u66fe\u7d93\u76ef\u8457 traceroute \u767c\u5446\uff0c\u60f3\u4e0d\u660e\u767d\u70ba\u4ec0\u9ebc\u5728\u4f60\u300c\u5207\u63db\u4e86 DNS\u300d\u5f88\u4e45\u4e4b\u5f8c\uff0c\u4ecd\u7136\u9084\u6709\u4f7f\u7528\u8005\u6253\u5230\u820a [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/why-lower-dns-ttl-before-a-site-migration\/\">Read 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