{"id":121042,"date":"2024-10-25T11:04:19","date_gmt":"2024-10-25T03:04:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/121042\/"},"modified":"2024-10-25T11:04:20","modified_gmt":"2024-10-25T03:04:20","slug":"redis-%e5%9f%ba%e6%96%bc-ttl-%e6%a9%9f%e5%88%b6%e7%9a%84%e5%bf%ab%e9%80%9f%e6%9f%a5%e8%a9%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/121042\/","title":{"rendered":"Redis \u57fa\u65bc TTL \u6a5f\u5236\u7684\u5feb\u901f\u67e5\u8a62"},"content":{"rendered":"<h1 id=\"redis-%e5%9f%ba%e6%96%bc-ttl-%e6%a9%9f%e5%88%b6%e7%9a%84%e5%bf%ab%e9%80%9f%e6%9f%a5%e8%a9%a2-VKXkUTjjnv\">Redis \u57fa\u65bc TTL \u6a5f\u5236\u7684\u5feb\u901f\u67e5\u8a62<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u5feb\u901f\u67e5\u8a62\u548c\u9ad8\u6548\u7684\u6578\u64da\u5b58\u53d6\u662f\u61c9\u7528\u7a0b\u5e8f\u6210\u529f\u7684\u95dc\u9375\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u652f\u6301\u5feb\u901f\u67e5\u8a62\uff0c\u5176\u4e2d\u57fa\u65bc TTL\uff08Time To Live\uff09\u6a5f\u5236\u7684\u67e5\u8a62\u5c24\u70ba\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Redis \u7684 TTL \u6a5f\u5236\u53ca\u5176\u5728\u5feb\u901f\u67e5\u8a62\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-ttl%ef%bc%9f-VKXkUTjjnv\">\u4ec0\u9ebc\u662f TTL\uff1f<\/h2>\n<p>TTL \u662f\u4e00\u7a2e\u7528\u65bc\u63a7\u5236\u6578\u64da\u5b58\u6d3b\u6642\u9593\u7684\u6a5f\u5236\u3002\u7576\u4e00\u500b\u9375\u88ab\u8a2d\u7f6e TTL \u6642\uff0c\u8a72\u9375\u5728\u6307\u5b9a\u7684\u6642\u9593\u5167\u6709\u6548\uff0c\u8d85\u904e\u9019\u500b\u6642\u9593\u5f8c\uff0c\u8a72\u9375\u5c07\u81ea\u52d5\u88ab\u522a\u9664\u3002\u9019\u4e00\u7279\u6027\u4f7f\u5f97 Redis \u7279\u5225\u9069\u5408\u7528\u65bc\u7de9\u5b58\u548c\u6703\u8a71\u7ba1\u7406\u7b49\u5834\u666f\u3002<\/p>\n<h2 id=\"redis-%e4%b8%ad%e7%9a%84-ttl-%e8%a8%ad%e7%bd%ae-VKXkUTjjnv\">Redis \u4e2d\u7684 TTL \u8a2d\u7f6e<\/h2>\n<p>\u5728 Redis \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u8a2d\u7f6e TTL\uff1a<\/p>\n<pre><code>EXPIRE key seconds<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u6703\u5c07\u6307\u5b9a\u7684\u9375\u8a2d\u7f6e\u70ba\u5728\u6307\u5b9a\u7684\u79d2\u6578\u5f8c\u904e\u671f\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>EXPIRE mykey 60<\/code><\/pre>\n<p>\u9019\u8868\u793a\u9375 &#8220;mykey&#8221; \u5c07\u5728 60 \u79d2\u5f8c\u81ea\u52d5\u522a\u9664\u3002\u9664\u4e86 EXPIRE \u547d\u4ee4\uff0cRedis \u9084\u63d0\u4f9b\u4e86\u5176\u4ed6\u76f8\u95dc\u547d\u4ee4\uff0c\u5982\uff1a<\/p>\n<ul>\n<li><code>TTL key<\/code>\uff1a\u67e5\u8a62\u6307\u5b9a\u9375\u7684\u5269\u9918\u751f\u5b58\u6642\u9593\u3002<\/li>\n<li><code>PERSIST key<\/code>\uff1a\u79fb\u9664\u6307\u5b9a\u9375\u7684\u904e\u671f\u6642\u9593\uff0c\u4f7f\u5176\u6c38\u4e45\u6709\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"ttl-%e5%9c%a8%e5%bf%ab%e9%80%9f%e6%9f%a5%e8%a9%a2%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8-VKXkUTjjnv\">TTL \u5728\u5feb\u901f\u67e5\u8a62\u4e2d\u7684\u61c9\u7528<\/h2>\n<p>\u57fa\u65bc TTL \u7684\u67e5\u8a62\u5728\u591a\u7a2e\u5834\u666f\u4e2d\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u7684\u61c9\u7528\u6848\u4f8b\uff1a<\/p>\n<h3 id=\"1-%e7%b7%a9%e5%ad%98%e7%ae%a1%e7%90%86-VKXkUTjjnv\">1. \u7de9\u5b58\u7ba1\u7406<\/h3>\n<p>\u5728\u7de9\u5b58\u7cfb\u7d71\u4e2d\uff0cTTL \u53ef\u4ee5\u5e6b\u52a9\u81ea\u52d5\u6e05\u7406\u904e\u671f\u7684\u6578\u64da\uff0c\u5f9e\u800c\u91cb\u653e\u5167\u5b58\u8cc7\u6e90\u3002\u4f8b\u5982\uff0c\u7576\u4e00\u500b\u7528\u6236\u8acb\u6c42\u67d0\u500b\u8cc7\u6e90\u6642\uff0c\u53ef\u4ee5\u5c07\u8a72\u8cc7\u6e90\u7684\u7d50\u679c\u7de9\u5b58\u5728 Redis \u4e2d\uff0c\u4e26\u8a2d\u7f6e TTL\u3002\u9019\u6a23\uff0c\u7576\u7528\u6236\u518d\u6b21\u8acb\u6c42\u76f8\u540c\u7684\u8cc7\u6e90\u6642\uff0c\u53ef\u4ee5\u76f4\u63a5\u5f9e\u7de9\u5b58\u4e2d\u7372\u53d6\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002<\/p>\n<h3 id=\"2-%e6%9c%83%e8%a9%b1%e7%ae%a1%e7%90%86-VKXkUTjjnv\">2. \u6703\u8a71\u7ba1\u7406<\/h3>\n<p>\u5728 Web \u61c9\u7528\u4e2d\uff0c\u4f7f\u7528 Redis \u4f86\u7ba1\u7406\u7528\u6236\u6703\u8a71\u662f\u4e00\u500b\u5e38\u898b\u7684\u505a\u6cd5\u3002\u6bcf\u7576\u7528\u6236\u767b\u9304\u6642\uff0c\u53ef\u4ee5\u5c07\u5176\u6703\u8a71\u4fe1\u606f\u5b58\u5132\u5728 Redis \u4e2d\uff0c\u4e26\u8a2d\u7f6e TTL\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6703\u8a71\u5728\u4e00\u5b9a\u6642\u9593\u5167\u6709\u6548\uff0c\u904e\u671f\u5f8c\u81ea\u52d5\u6e05\u9664\uff0c\u5f9e\u800c\u63d0\u9ad8\u5b89\u5168\u6027\u3002<\/p>\n<h3 id=\"3-%e5%af%a6%e6%99%82%e6%95%b8%e6%93%9a%e5%88%86%e6%9e%90-VKXkUTjjnv\">3. \u5be6\u6642\u6578\u64da\u5206\u6790<\/h3>\n<p>\u5728\u5be6\u6642\u6578\u64da\u5206\u6790\u4e2d\uff0cTTL \u53ef\u4ee5\u7528\u65bc\u5b58\u5132\u77ed\u671f\u5167\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u5373\u6642\u7684\u7528\u6236\u884c\u70ba\u6578\u64da\uff0c\u53ef\u4ee5\u5c07\u5176\u5b58\u5132\u5728 Redis \u4e2d\uff0c\u4e26\u8a2d\u7f6e\u8f03\u77ed\u7684 TTL\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5373\u6642\u6027\uff0c\u540c\u6642\u907f\u514d\u904e\u591a\u7684\u6b77\u53f2\u6578\u64da\u4f54\u7528\u5b58\u5132\u7a7a\u9593\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-VKXkUTjjnv\">\u793a\u4f8b\u4ee3\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 Redis \u4e2d\u4f7f\u7528 TTL \u4f86\u7ba1\u7406\u7de9\u5b58\uff1a<\/p>\n<pre><code>import redis\n\n# \u9023\u63a5\u5230 Redis\nr = redis.Redis(host='localhost', port=6379, db=0)\n\n# \u8a2d\u7f6e\u9375\u503c\u5c0d\u4e26\u8a2d\u7f6e TTL\nr.set('user:1000', 'John Doe', ex=300)  # 300\u79d2\u5f8c\u904e\u671f\n\n# \u67e5\u8a62\u5269\u9918 TTL\nremaining_ttl = r.ttl('user:1000')\nprint(f'\u9375 user:1000 \u7684\u5269\u9918 TTL: {remaining_ttl} \u79d2')\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-VKXkUTjjnv\">\u7e3d\u7d50<\/h2>\n<p>Redis \u7684 TTL \u6a5f\u5236\u70ba\u5feb\u901f\u67e5\u8a62\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u652f\u6301\uff0c\u7121\u8ad6\u662f\u5728\u7de9\u5b58\u7ba1\u7406\u3001\u6703\u8a71\u7ba1\u7406\u9084\u662f\u5be6\u6642\u6578\u64da\u5206\u6790\u4e2d\uff0c\u90fd\u80fd\u6709\u6548\u63d0\u9ad8\u6578\u64da\u5b58\u53d6\u7684\u6548\u7387\u3002\u901a\u904e\u5408\u7406\u8a2d\u7f6e TTL\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5373\u6642\u6027\u548c\u6709\u6548\u6027\uff0c\u5f9e\u800c\u63d0\u5347\u6574\u9ad4\u61c9\u7528\u7684\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u611f\u8208\u8da3\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u548c\u904b\u7528 Redis \u7b49\u6578\u64da\u5eab\u6280\u8853\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 Redis \u57fa\u65bc TTL \u6a5f\u5236\u7684\u5feb\u901f\u67e5\u8a62\uff0c\u63d0\u5347\u6578\u64da\u5b58\u53d6\u6548\u7387\uff0c\u512a\u5316\u61c9\u7528\u6027\u80fd\uff0c\u5be6\u73fe\u5373\u6642\u6578\u64da\u7ba1\u7406\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-121042","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/121042","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=121042"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/121042\/revisions"}],"predecessor-version":[{"id":121043,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/121042\/revisions\/121043"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=121042"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=121042"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=121042"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}