{"id":129121,"date":"2024-10-26T19:15:26","date_gmt":"2024-10-26T11:15:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/129121\/"},"modified":"2024-10-26T19:15:27","modified_gmt":"2024-10-26T11:15:27","slug":"redis%e4%bd%bf%e7%94%a8%e6%96%b9%e5%bc%8f%e6%9f%a5%e8%a9%a2%e5%bf%ab%e9%80%9f%e7%b5%b1%e8%a8%88key%e6%95%b8%e9%87%8f%ef%bc%88redis%e6%9f%a5%e8%a9%a2key%e6%95%b8%e9%87%8f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/129121\/","title":{"rendered":"Redis\u4f7f\u7528\u65b9\u5f0f\u67e5\u8a62\u5feb\u901f\u7d71\u8a08key\u6578\u91cf\uff08redis\u67e5\u8a62key\u6578\u91cf\uff09"},"content":{"rendered":"

Redis\u4f7f\u7528\u65b9\u5f0f\u67e5\u8a62\u5feb\u901f\u7d71\u8a08key\u6578\u91cf\uff08redis\u67e5\u8a62key\u6578\u91cf\uff09<\/h1>\n

Redis\u662f\u4e00\u500b\u9ad8\u6548\u80fd\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u4e2d\uff0c\u5982\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u6578\u64da\u6301\u4e45\u5316\u7b49\u3002\u7576\u4f7f\u7528Redis\u6642\uff0c\u4e86\u89e3\u5982\u4f55\u5feb\u901f\u67e5\u8a62key\u7684\u6578\u91cf\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u76e3\u63a7\u548c\u7ba1\u7406\u6578\u64da\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u67e5\u8a62Redis\u4e2dkey\u6578\u91cf\u7684\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n

\u4f7f\u7528Redis\u547d\u4ee4\u67e5\u8a62key\u6578\u91cf<\/h2>\n

Redis\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5167\u5efa\u7684\u547d\u4ee4\u4f86\u67e5\u8a62key\u7684\u6578\u91cf\u3002\u6700\u5e38\u7528\u7684\u547d\u4ee4\u662f DBSIZE<\/code>\uff0c\u5b83\u53ef\u4ee5\u8fd4\u56de\u7576\u524d\u6578\u64da\u5eab\u4e2dkey\u7684\u7e3d\u6578\u3002<\/p>\n

127.0.0.1:6379> DBSIZE\n(integer) 42\n<\/code><\/pre>\n
\u9019\u500b\u547d\u4ee4\u975e\u5e38\u7c21\u55ae\uff0c\u57f7\u884c\u5f8c\u6703\u8fd4\u56de\u4e00\u500b\u6574\u6578\uff0c\u8868\u793a\u7576\u524d\u6578\u64da\u5eab\u4e2d\u5b58\u5728\u7684key\u7684\u6578\u91cf\u3002<\/p>\n
\u4f7f\u7528SCAN\u547d\u4ee4\u9032\u884c\u904d\u6b77<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u7279\u5225\u662f\u7576\u6578\u64da\u5eab\u4e2d\u7684key\u6578\u91cf\u975e\u5e38\u9f90\u5927\u6642\uff0c\u4f7f\u7528 SCAN<\/code> \u547d\u4ee4\u4f86\u904d\u6b77\u6240\u6709\u7684key\u53ef\u80fd\u6703\u66f4\u6709\u6548\u3002\u9019\u500b\u547d\u4ee4\u4e0d\u6703\u4e00\u6b21\u6027\u8fd4\u56de\u6240\u6709\u7684key\uff0c\u800c\u662f\u5206\u6279\u8fd4\u56de\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u5c0dRedis\u6027\u80fd\u7684\u5f71\u97ff\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 SCAN<\/code> \u547d\u4ee4\u4f86\u8a08\u7b97key\u6578\u91cf\u7684\u793a\u4f8b\uff1a<\/p>\n
127.0.0.1:6379> SCAN 0\n1) \"0\"\n2) 1) \"key1\"\n   2) \"key2\"\n   3) \"key3\"\n   ...\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7b2c\u4e00\u6b21\u57f7\u884c SCAN<\/code> \u547d\u4ee4\u8fd4\u56de\u4e86\u6e38\u6a19\u548c\u4e00\u7d44key\u3002\u4f60\u9700\u8981\u6301\u7e8c\u8abf\u7528 SCAN<\/code> \u547d\u4ee4\uff0c\u76f4\u5230\u6e38\u6a19\u8fd4\u56de\u52300\u70ba\u6b62\uff0c\u9019\u6a23\u624d\u80fd\u904d\u6b77\u6240\u6709\u7684key\u3002\u4f60\u53ef\u4ee5\u5728\u904d\u6b77\u7684\u904e\u7a0b\u4e2d\u8a08\u7b97key\u7684\u6578\u91cf\u3002<\/p>\n
\u4f7f\u7528Redis\u7684KEYS\u547d\u4ee4<\/h2>\n
\u53e6\u4e00\u7a2e\u67e5\u8a62key\u6578\u91cf\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 KEYS<\/code> \u547d\u4ee4\u3002\u9019\u500b\u547d\u4ee4\u53ef\u4ee5\u6839\u64da\u6a21\u5f0f\u5339\u914d\u8fd4\u56de\u6240\u6709\u7684key\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u67e5\u8a62\u6240\u6709\u4ee5 “user:” \u958b\u982d\u7684key\uff0c\u53ef\u4ee5\u9019\u6a23\u57f7\u884c\uff1a<\/p>\n
127.0.0.1:6379> KEYS user:*\n1) \"user:1\"\n2) \"user:2\"\n3) \"user:3\"\n<\/code><\/pre>\n
\u4e0d\u904e\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cKEYS<\/code> \u547d\u4ee4\u5728\u5927\u6578\u64da\u91cf\u7684\u60c5\u6cc1\u4e0b\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\uff0c\u56e0\u6b64\u4e0d\u5efa\u8b70\u5728\u751f\u7522\u74b0\u5883\u4e2d\u983b\u7e41\u4f7f\u7528\u3002<\/p>\n
\u4f7f\u7528Redis\u7684Lua\u8173\u672c<\/h2>\n
\u5982\u679c\u9700\u8981\u66f4\u8907\u96dc\u7684\u908f\u8f2f\u4f86\u8a08\u7b97key\u7684\u6578\u91cf\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528Lua\u8173\u672c\u3002Redis\u652f\u6301\u5728\u670d\u52d9\u5668\u7aef\u57f7\u884cLua\u8173\u672c\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u7db2\u7d61\u5ef6\u9072\u4e26\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n
local count = 0\nlocal cursor = \"0\"\nrepeat\n    local result = redis.call(\"SCAN\", cursor)\n    cursor = result[1]\n    count = count + #result[2]\nuntil cursor == \"0\"\nreturn count\n<\/code><\/pre>\n
\u9019\u6bb5Lua\u8173\u672c\u5c07\u904d\u6b77\u6240\u6709\u7684key\u4e26\u8a08\u7b97\u5176\u6578\u91cf\uff0c\u6700\u7d42\u8fd4\u56de\u7e3d\u6578\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728Redis\u4e2d\u67e5\u8a62key\u7684\u6578\u91cf\u6709\u591a\u7a2e\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528 DBSIZE<\/code>\u3001SCAN<\/code>\u3001KEYS<\/code> \u547d\u4ee4\u4ee5\u53caLua\u8173\u672c\u3002\u6839\u64da\u5177\u9ad4\u7684\u9700\u6c42\u548c\u6578\u64da\u91cf\uff0c\u53ef\u4ee5\u9078\u64c7\u6700\u5408\u9069\u7684\u65b9\u6cd5\u4f86\u9032\u884c\u67e5\u8a62\u3002\u4e86\u89e3\u9019\u4e9b\u65b9\u6cd5\u4e0d\u50c5\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u6578\u64da\uff0c\u9084\u80fd\u63d0\u9ad8\u61c9\u7528\u7684\u6027\u80fd\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f\u9700\u8981\u7a69\u5b9a\u7684 \u4f3a\u670d\u5668<\/a> \u9084\u662f\u9748\u6d3b\u7684 \u96f2\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5feb\u901f\u67e5\u8a62Redis\u4e2dkey\u7684\u6578\u91cf\uff0c\u638c\u63e1\u4f7f\u7528\u65b9\u5f0f\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u8f15\u9b06\u7372\u53d6\u7d71\u8a08\u8cc7\u8a0a\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-129121","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129121","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=129121"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129121\/revisions"}],"predecessor-version":[{"id":129122,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129121\/revisions\/129122"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=129121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=129121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=129121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}