{"id":105614,"date":"2024-10-23T13:20:25","date_gmt":"2024-10-23T05:20:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/105614\/"},"modified":"2024-10-23T13:20:26","modified_gmt":"2024-10-23T05:20:26","slug":"redis-%e9%81%8e%e6%9c%9f%e6%99%82%e5%a6%82%e4%bd%95%e8%a8%ad%e7%bd%ae%e8%99%95%e7%90%86%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/105614\/","title":{"rendered":"Redis \u904e\u671f\u6642\u5982\u4f55\u8a2d\u7f6e\u8655\u7406\u7b56\u7565"},"content":{"rendered":"<h1 id=\"redis-%e9%81%8e%e6%9c%9f%e6%99%82%e5%a6%82%e4%bd%95%e8%a8%ad%e7%bd%ae%e8%99%95%e7%90%86%e7%ad%96%e7%95%a5-SjFBXwgCOi\">Redis \u904e\u671f\u6642\u5982\u4f55\u8a2d\u7f6e\u8655\u7406\u7b56\u7565<\/h1>\n<p>Redis \u662f\u4e00\u500b\u9ad8\u6548\u80fd\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u6578\u64da\u5b58\u5132\u7b49\u5834\u666f\u3002\u5176\u652f\u6301\u7684\u904e\u671f\u9375\u529f\u80fd\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u8a2d\u7f6e\u9375\u7684\u6709\u6548\u671f\u9650\uff0c\u7576\u9375\u904e\u671f\u5f8c\uff0cRedis \u6703\u81ea\u52d5\u5c07\u5176\u522a\u9664\u3002\u9019\u4e00\u7279\u6027\u5728\u8a31\u591a\u61c9\u7528\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5728\u5be6\u969b\u4f7f\u7528\u4e2d\uff0c\u5982\u4f55\u8a2d\u7f6e\u904e\u671f\u9375\u7684\u8655\u7406\u7b56\u7565\u537b\u662f\u500b\u503c\u5f97\u6df1\u5165\u63a2\u8a0e\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"%e9%81%8e%e6%9c%9f%e9%8d%b5%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-SjFBXwgCOi\">\u904e\u671f\u9375\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728 Redis \u4e2d\uff0c\u904e\u671f\u9375\u662f\u6307\u8a2d\u7f6e\u4e86\u751f\u5b58\u6642\u9593\uff08TTL, Time To Live\uff09\u7684\u9375\u3002\u7576 TTL \u5230\u671f\u5f8c\uff0c\u8a72\u9375\u6703\u88ab\u81ea\u52d5\u522a\u9664\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u8a2d\u7f6e\u9375\u7684\u904e\u671f\u6642\u9593\uff1a<\/p>\n<pre><code>EXPIRE key seconds<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07\u9375 &#8220;session&#8221; \u7684\u904e\u671f\u6642\u9593\u8a2d\u7f6e\u70ba 60 \u79d2\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>EXPIRE session 60<\/code><\/pre>\n<h2 id=\"%e9%81%8e%e6%9c%9f%e9%8d%b5%e7%9a%84%e8%99%95%e7%90%86%e7%ad%96%e7%95%a5-SjFBXwgCOi\">\u904e\u671f\u9375\u7684\u8655\u7406\u7b56\u7565<\/h2>\n<p>Redis \u63d0\u4f9b\u4e86\u591a\u7a2e\u904e\u671f\u9375\u7684\u8655\u7406\u7b56\u7565\uff0c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u5e7e\u7a2e\uff1a<\/p>\n<ul>\n<li><strong>\u60f0\u6027\u522a\u9664\uff08Lazy Deletion\uff09<\/strong>\uff1a\u7576\u7528\u6236\u8a2a\u554f\u4e00\u500b\u904e\u671f\u7684\u9375\u6642\uff0cRedis \u6703\u6aa2\u67e5\u8a72\u9375\u662f\u5426\u5df2\u904e\u671f\u3002\u5982\u679c\u904e\u671f\uff0c\u5247\u522a\u9664\u8a72\u9375\u3002\u9019\u7a2e\u65b9\u5f0f\u7684\u512a\u9ede\u662f\u6e1b\u5c11\u4e86\u5167\u5b58\u7684\u4f7f\u7528\uff0c\u4f46\u53ef\u80fd\u6703\u5c0e\u81f4\u904e\u671f\u9375\u5728\u5167\u5b58\u4e2d\u5b58\u5728\u4e00\u6bb5\u6642\u9593\u3002<\/li>\n<li><strong>\u4e3b\u52d5\u522a\u9664\uff08Active Expiration\uff09<\/strong>\uff1aRedis \u6703\u5b9a\u671f\u96a8\u6a5f\u6aa2\u67e5\u4e00\u90e8\u5206\u904e\u671f\u9375\uff0c\u4e26\u5c07\u5176\u522a\u9664\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u91cb\u653e\u5167\u5b58\uff0c\u907f\u514d\u904e\u671f\u9375\u9577\u6642\u9593\u4f54\u7528\u8cc7\u6e90\u3002\u9019\u4e00\u904e\u7a0b\u901a\u5e38\u5728\u6bcf 100 \u6beb\u79d2\u9032\u884c\u4e00\u6b21\u3002<\/li>\n<li><strong>\u5b9a\u671f\u522a\u9664\uff08Periodic Deletion\uff09<\/strong>\uff1aRedis \u6703\u5728\u6bcf\u6b21\u57f7\u884c\u4e3b\u52d5\u522a\u9664\u6642\uff0c\u96a8\u6a5f\u9078\u64c7\u4e00\u5b9a\u6578\u91cf\u7684\u9375\u9032\u884c\u6aa2\u67e5\uff0c\u9019\u6a23\u53ef\u4ee5\u4fdd\u8b49\u904e\u671f\u9375\u4e0d\u6703\u9577\u6642\u9593\u5b58\u5728\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a8%ad%e7%bd%ae%e9%81%8e%e6%9c%9f%e9%8d%b5%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-SjFBXwgCOi\">\u8a2d\u7f6e\u904e\u671f\u9375\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528 Redis \u7684\u904e\u671f\u9375\u529f\u80fd\u6642\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li><strong>\u5408\u7406\u8a2d\u7f6e TTL<\/strong>\uff1a\u6839\u64da\u696d\u52d9\u9700\u6c42\u5408\u7406\u8a2d\u7f6e\u9375\u7684\u904e\u671f\u6642\u9593\uff0c\u907f\u514d\u904e\u671f\u6642\u9593\u904e\u9577\u6216\u904e\u77ed\u3002<\/li>\n<li><strong>\u76e3\u63a7\u904e\u671f\u9375\u7684\u4f7f\u7528\u60c5\u6cc1<\/strong>\uff1a\u5b9a\u671f\u6aa2\u67e5\u904e\u671f\u9375\u7684\u6578\u91cf\u548c\u5167\u5b58\u4f7f\u7528\u60c5\u6cc1\uff0c\u78ba\u4fdd\u7cfb\u7d71\u904b\u884c\u7684\u7a69\u5b9a\u6027\u3002<\/li>\n<li><strong>\u4f7f\u7528 Redis \u7684\u4e8b\u4ef6\u901a\u77e5\u529f\u80fd<\/strong>\uff1aRedis \u652f\u6301\u9375\u904e\u671f\u4e8b\u4ef6\u7684\u901a\u77e5\uff0c\u53ef\u4ee5\u901a\u904e Pub\/Sub \u6a5f\u5236\u4f86\u76e3\u63a7\u904e\u671f\u9375\u7684\u60c5\u6cc1\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-SjFBXwgCOi\">\u793a\u4f8b\u4ee3\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 Redis \u8a2d\u7f6e\u904e\u671f\u9375\u7684\u7c21\u55ae\u793a\u4f8b\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 \"user_session\" \u4e26\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u70ba 30 \u79d2\nr.set('user_session', 'abc123')\nr.expire('user_session', 30)\n\n# \u6aa2\u67e5\u9375\u7684\u503c\nprint(r.get('user_session'))  # \u8f38\u51fa: b'abc123'\n\n# \u7b49\u5f85 31 \u79d2\u5f8c\u518d\u6aa2\u67e5\nimport time\ntime.sleep(31)\nprint(r.get('user_session'))  # \u8f38\u51fa: None\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SjFBXwgCOi\">\u7e3d\u7d50<\/h2>\n<p>Redis \u7684\u904e\u671f\u9375\u529f\u80fd\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u6578\u64da\u7ba1\u7406\u65b9\u5f0f\u3002\u901a\u904e\u5408\u7406\u8a2d\u7f6e\u904e\u671f\u7b56\u7565\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u5167\u5b58\u4f7f\u7528\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u3002\u5728\u9078\u64c7\u5408\u9069\u7684\u904e\u671f\u9375\u8655\u7406\u7b56\u7565\u6642\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u7684\u696d\u52d9\u9700\u6c42\u9032\u884c\u8abf\u6574\u3002\u82e5\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u8f15\u9b06\u642d\u5efa\u9ad8\u6548\u7684\u61c9\u7528\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Redis\u904e\u671f\u9375\u7684\u8655\u7406\u7b56\u7565\uff0c\u63a2\u7d22\u81ea\u52d5\u522a\u9664\u3001\u60f0\u6027\u522a\u9664\u53ca\u4e3b\u52d5\u522a\u9664\u7684\u6700\u4f73\u5be6\u8e10\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-105614","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/105614","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=105614"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/105614\/revisions"}],"predecessor-version":[{"id":105615,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/105614\/revisions\/105615"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=105614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=105614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=105614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}