{"id":124969,"date":"2024-10-25T18:42:21","date_gmt":"2024-10-25T10:42:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/124969\/"},"modified":"2024-10-25T18:42:22","modified_gmt":"2024-10-25T10:42:22","slug":"redis-%e6%aa%a2%e6%9f%a5%e8%a7%a3%e6%b1%ba%e9%81%8e%e6%9c%9f-key-%e7%9a%84%e6%96%b0%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/124969\/","title":{"rendered":"Redis \u6aa2\u67e5\u89e3\u6c7a\u904e\u671f Key \u7684\u65b0\u65b9\u6cd5"},"content":{"rendered":"<h1 id=\"redis-%e6%aa%a2%e6%9f%a5%e8%a7%a3%e6%b1%ba%e9%81%8e%e6%9c%9f-key-%e7%9a%84%e6%96%b0%e6%96%b9%e6%b3%95-qtDlUqYxvO\">Redis \u6aa2\u67e5\u89e3\u6c7a\u904e\u671f Key \u7684\u65b0\u65b9\u6cd5<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cRedis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u4e2d\u3002\u96a8\u8457\u61c9\u7528\u7a0b\u5e8f\u7684\u589e\u9577\uff0c\u7ba1\u7406\u904e\u671f\u9375\u7684\u9700\u6c42\u4e5f\u65e5\u76ca\u589e\u52a0\u3002\u904e\u671f\u9375\u7684\u7ba1\u7406\u4e0d\u50c5\u5f71\u97ff\u7cfb\u7d71\u7684\u6027\u80fd\uff0c\u9084\u53ef\u80fd\u5f71\u97ff\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u53ef\u7528\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e Redis \u6aa2\u67e5\u548c\u89e3\u6c7a\u904e\u671f\u9375\u7684\u65b0\u65b9\u6cd5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u5176\u6578\u64da\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-qtDlUqYxvO\">\u904e\u671f\u9375\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728 Redis \u4e2d\uff0c\u904e\u671f\u9375\u662f\u6307\u90a3\u4e9b\u8a2d\u7f6e\u4e86\u904e\u671f\u6642\u9593\u7684\u9375\u3002\u7576\u9019\u4e9b\u9375\u7684\u751f\u5b58\u6642\u9593\uff08TTL\uff09\u5230\u9054\u6642\uff0cRedis \u6703\u81ea\u52d5\u5c07\u5176\u522a\u9664\u3002\u9019\u4e00\u6a5f\u5236\u6709\u52a9\u65bc\u91cb\u653e\u5167\u5b58\u7a7a\u9593\uff0c\u4fdd\u6301\u6578\u64da\u5eab\u7684\u9ad8\u6548\u904b\u884c\u3002\u7136\u800c\uff0c\u904e\u671f\u9375\u7684\u7ba1\u7406\u4e26\u975e\u7e3d\u662f\u90a3\u9ebc\u7c21\u55ae\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\u3002<\/p>\n<h2 id=\"%e9%81%8e%e6%9c%9f%e9%8d%b5%e7%9a%84%e6%aa%a2%e6%9f%a5%e6%96%b9%e6%b3%95-qtDlUqYxvO\">\u904e\u671f\u9375\u7684\u6aa2\u67e5\u65b9\u6cd5<\/h2>\n<p>Redis \u63d0\u4f9b\u4e86\u5e7e\u7a2e\u65b9\u6cd5\u4f86\u6aa2\u67e5\u904e\u671f\u9375\u7684\u72c0\u614b\uff1a<\/p>\n<ul>\n<li><strong>\u5b9a\u671f\u6aa2\u67e5\uff1a<\/strong>Redis \u6bcf\u9694 100 \u6beb\u79d2\u6703\u96a8\u6a5f\u6aa2\u67e5\u4e00\u90e8\u5206\u904e\u671f\u9375\uff0c\u4e26\u522a\u9664\u90a3\u4e9b\u5df2\u7d93\u904e\u671f\u7684\u9375\u3002\u9019\u7a2e\u65b9\u6cd5\u96d6\u7136\u7c21\u55ae\uff0c\u4f46\u5728\u9ad8\u8ca0\u8f09\u7684\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u904e\u671f\u9375\u672a\u80fd\u53ca\u6642\u88ab\u522a\u9664\u3002<\/li>\n<li><strong>\u60f0\u6027\u522a\u9664\uff1a<\/strong>\u7576\u5ba2\u6236\u7aef\u8acb\u6c42\u4e00\u500b\u9375\u6642\uff0cRedis \u6703\u6aa2\u67e5\u8a72\u9375\u662f\u5426\u904e\u671f\u3002\u5982\u679c\u904e\u671f\uff0c\u5247\u6703\u522a\u9664\u8a72\u9375\u4e26\u8fd4\u56de nil\u3002\u9019\u7a2e\u65b9\u6cd5\u80fd\u5920\u6e1b\u5c11\u5167\u5b58\u7684\u4f7f\u7528\uff0c\u4f46\u5728\u9ad8\u4e26\u767c\u7684\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%96%b0%e6%96%b9%e6%b3%95%ef%bc%9a%e4%bd%bf%e7%94%a8-lua-%e8%85%b3%e6%9c%ac-qtDlUqYxvO\">\u65b0\u65b9\u6cd5\uff1a\u4f7f\u7528 Lua \u8173\u672c<\/h2>\n<p>\u96a8\u8457 Redis \u7684\u767c\u5c55\uff0c\u4f7f\u7528 Lua \u8173\u672c\u4f86\u7ba1\u7406\u904e\u671f\u9375\u6210\u70ba\u4e86\u4e00\u7a2e\u65b0\u8208\u7684\u65b9\u6cd5\u3002Lua \u8173\u672c\u5141\u8a31\u958b\u767c\u8005\u5728 Redis \u670d\u52d9\u5668\u7aef\u57f7\u884c\u4ee3\u78bc\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u7db2\u7d61\u5ef6\u9072\u4e26\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<pre><code>\n-- Lua \u8173\u672c\u793a\u4f8b\uff1a\u6aa2\u67e5\u4e26\u522a\u9664\u904e\u671f\u9375\nlocal key = KEYS[1]\nlocal ttl = redis.call('TTL', key)\n\nif ttl &lt;= 0 then\n    redis.call('DEL', key)\n    return 'Key expired and deleted'\nelse\n    return 'Key is still valid'\nend\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u8173\u672c\u9996\u5148\u6aa2\u67e5\u6307\u5b9a\u9375\u7684 TTL\uff0c\u5982\u679c TTL \u5c0f\u65bc\u6216\u7b49\u65bc\u96f6\uff0c\u5247\u522a\u9664\u8a72\u9375\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u512a\u52e2\u5728\u65bc\u53ef\u4ee5\u5728\u55ae\u500b\u64cd\u4f5c\u4e2d\u5b8c\u6210\u6aa2\u67e5\u548c\u522a\u9664\uff0c\u5f9e\u800c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-redis-%e4%ba%8b%e4%bb%b6%e9%80%9a%e7%9f%a5-qtDlUqYxvO\">\u4f7f\u7528 Redis \u4e8b\u4ef6\u901a\u77e5<\/h2>\n<p>\u53e6\u4e00\u7a2e\u65b0\u65b9\u6cd5\u662f\u5229\u7528 Redis \u7684\u4e8b\u4ef6\u901a\u77e5\u529f\u80fd\u3002\u901a\u904e\u914d\u7f6e Redis \u7684 <code>notify-keyspace-events<\/code> \u53c3\u6578\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63a5\u6536\u6709\u95dc\u9375\u904e\u671f\u7684\u901a\u77e5\uff0c\u5f9e\u800c\u5728\u904e\u671f\u4e8b\u4ef6\u767c\u751f\u6642\u57f7\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002<\/p>\n<pre><code>\n# \u914d\u7f6e Redis \u4ee5\u555f\u7528\u904e\u671f\u4e8b\u4ef6\u901a\u77e5\nCONFIG SET notify-keyspace-events Ex\n<\/code><\/pre>\n<p>\u9019\u6a23\u4e00\u4f86\uff0c\u7576\u9375\u904e\u671f\u6642\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904e\u8a02\u95b1\u76f8\u61c9\u7684\u901a\u9053\u4f86\u7372\u53d6\u901a\u77e5\uff0c\u4e26\u6839\u64da\u9700\u8981\u57f7\u884c\u5f8c\u7e8c\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-qtDlUqYxvO\">\u7d50\u8ad6<\/h2>\n<p>\u96a8\u8457\u61c9\u7528\u7a0b\u5e8f\u7684\u8907\u96dc\u6027\u589e\u52a0\uff0c\u7ba1\u7406\u904e\u671f\u9375\u7684\u9700\u6c42\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528 Lua \u8173\u672c\u548c Redis \u4e8b\u4ef6\u901a\u77e5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u6aa2\u67e5\u548c\u8655\u7406\u904e\u671f\u9375\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u9019\u4e9b\u65b0\u65b9\u6cd5\u4e0d\u50c5\u80fd\u5920\u7c21\u5316\u904e\u671f\u9375\u7684\u7ba1\u7406\uff0c\u9084\u80fd\u5920\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\u4fdd\u6301\u7cfb\u7d71\u7684\u9ad8\u6548\u904b\u884c\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u548c\u5176\u4ed6\u670d\u52d9\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 Redis \u4e2d\u6aa2\u67e5\u548c\u89e3\u6c7a\u904e\u671f Key \u7684\u65b0\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u512a\u5316\u6027\u80fd\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7a69\u5b9a\u904b\u884c\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-124969","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124969","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=124969"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124969\/revisions"}],"predecessor-version":[{"id":124970,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124969\/revisions\/124970"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=124969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=124969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=124969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}