{"id":170579,"date":"2024-11-06T22:38:21","date_gmt":"2024-11-06T14:38:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/170579\/"},"modified":"2024-11-06T22:38:22","modified_gmt":"2024-11-06T14:38:22","slug":"%e5%8c%b9%e9%85%8dkeyredis%e5%af%a6%e7%8f%be%e6%89%b9%e9%87%8f%e6%a8%a1%e7%b3%8a%e6%b8%85%e9%99%a4%e5%8c%b9%e9%85%8dkey%ef%bc%88redis%e6%a8%a1%e7%b3%8a%e5%88%aa%e9%99%a4%e5%a4%9a%e5%80%8b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/170579\/","title":{"rendered":"\u5339\u914dkeyRedis\u5be6\u73fe\u6279\u91cf\u6a21\u7cca\u6e05\u9664\u5339\u914dkey\uff08redis\u6a21\u7cca\u522a\u9664\u591a\u500b\uff09"},"content":{"rendered":"

\u5339\u914dkeyRedis\u5be6\u73fe\u6279\u91cf\u6a21\u7cca\u6e05\u9664\u5339\u914dkey\uff08redis\u6a21\u7cca\u522a\u9664\u591a\u500b\uff09<\/h1>\n

\u5728\u4f7f\u7528Redis\u4f5c\u70ba\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u6642\uff0c\u7d93\u5e38\u6703\u9047\u5230\u9700\u8981\u6279\u91cf\u522a\u9664\u7b26\u5408\u7279\u5b9a\u6a21\u5f0f\u7684\u9375\u7684\u60c5\u6cc1\u3002\u9019\u7a2e\u9700\u6c42\u5728\u6e05\u7406\u904e\u671f\u6578\u64da\u6216\u91cd\u69cb\u6578\u64da\u7d50\u69cb\u6642\u5c24\u70ba\u5e38\u898b\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Redis\u7684\u547d\u4ee4\u4f86\u5be6\u73fe\u6279\u91cf\u6a21\u7cca\u522a\u9664\u5339\u914d\u7684\u9375\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

Redis\u7684\u9375\u7ba1\u7406<\/h2>\n

Redis\u662f\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\u3002\u6bcf\u500b\u9375\u90fd\u53ef\u4ee5\u8207\u4e00\u500b\u503c\u76f8\u95dc\u806f\uff0c\u4e26\u4e14\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u547d\u4ee4\u4f86\u7ba1\u7406\u9019\u4e9b\u9375\u3002\u7576\u9700\u8981\u522a\u9664\u591a\u500b\u9375\u6642\uff0cRedis\u63d0\u4f9b\u4e86\u5e7e\u500b\u6709\u7528\u7684\u547d\u4ee4\uff0c\u5982 DEL<\/code> \u548c UNLINK<\/code>\uff0c\u4f46\u9019\u4e9b\u547d\u4ee4\u901a\u5e38\u9700\u8981\u660e\u78ba\u6307\u5b9a\u9375\u540d\u3002<\/p>\n

\u4f7f\u7528\u6a21\u5f0f\u5339\u914d\u522a\u9664\u9375<\/h2>\n

\u8981\u5be6\u73fe\u6279\u91cf\u6a21\u7cca\u522a\u9664\uff0c\u9996\u5148\u9700\u8981\u4f7f\u7528 KEYS<\/code> \u547d\u4ee4\u4f86\u67e5\u627e\u7b26\u5408\u7279\u5b9a\u6a21\u5f0f\u7684\u9375\u3002\u9019\u500b\u547d\u4ee4\u5141\u8a31\u4f7f\u7528\u901a\u914d\u7b26\u4f86\u5339\u914d\u9375\u540d\uff0c\u4f8b\u5982\uff1a<\/p>\n

KEYS user:*<\/code><\/pre>\n
\u4e0a\u8ff0\u547d\u4ee4\u5c07\u8fd4\u56de\u6240\u6709\u4ee5 user:<\/code> \u958b\u982d\u7684\u9375\u3002\u96d6\u7136 KEYS<\/code> \u547d\u4ee4\u975e\u5e38\u65b9\u4fbf\uff0c\u4f46\u5728\u751f\u7522\u74b0\u5883\u4e2d\u4f7f\u7528\u6642\u9700\u8b39\u614e\uff0c\u56e0\u70ba\u5b83\u6703\u904d\u6b77\u6574\u500b\u9375\u7a7a\u9593\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u3002<\/p>\n
\u6279\u91cf\u522a\u9664\u5339\u914d\u7684\u9375<\/h2>\n
\u4e00\u65e6\u7372\u5f97\u4e86\u5339\u914d\u7684\u9375\u5217\u8868\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528 DEL<\/code> \u547d\u4ee4\u4f86\u522a\u9664\u9019\u4e9b\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728Redis\u4e2d\u5be6\u73fe\u6279\u91cf\u6a21\u7cca\u522a\u9664\uff1a<\/p>\n
local keys = redis.call('KEYS', 'user:*')\nfor i=1,#keys,5000 do\n    redis.call('DEL', unpack(keys, i, math.min(i+4999, #keys)))\nend<\/code><\/pre>\n
\u5728\u9019\u6bb5Lua\u8173\u672c\u4e2d\uff0c\u6211\u5011\u9996\u5148\u4f7f\u7528 KEYS<\/code> \u547d\u4ee4\u7372\u53d6\u6240\u6709\u4ee5 user:<\/code> \u958b\u982d\u7684\u9375\uff0c\u7136\u5f8c\u5c07\u9019\u4e9b\u9375\u5206\u6279\u6b21\u9032\u884c\u522a\u9664\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u4e00\u6b21\u6027\u522a\u9664\u904e\u591a\u9375\u800c\u5c0e\u81f4\u7684\u6027\u80fd\u554f\u984c\u3002<\/p>\n
\u4f7f\u7528SCAN\u547d\u4ee4\u7684\u512a\u52e2<\/h2>\n
\u7531\u65bc KEYS<\/code> \u547d\u4ee4\u7684\u6027\u80fd\u554f\u984c\uff0c\u5efa\u8b70\u4f7f\u7528 SCAN<\/code> \u547d\u4ee4\u4f86\u66ff\u4ee3\u3002SCAN<\/code> \u547d\u4ee4\u4e0d\u6703\u4e00\u6b21\u6027\u8fd4\u56de\u6240\u6709\u9375\uff0c\u800c\u662f\u4ee5\u6e38\u6a19\u7684\u65b9\u5f0f\u9010\u6b65\u8fd4\u56de\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u5c0d\u6027\u80fd\u7684\u5f71\u97ff\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 SCAN<\/code> \u547d\u4ee4\u7684\u793a\u4f8b\uff1a<\/p>\n
local cursor = '0'\nrepeat\n    local result = redis.call('SCAN', cursor, 'MATCH', 'user:*', 'COUNT', 1000)\n    cursor = result[1]\n    local keys = result[2]\n    if #keys > 0 then\n        redis.call('DEL', unpack(keys))\n    end\nuntil cursor == '0'<\/code><\/pre>\n
\u9019\u6bb5\u4ee3\u78bc\u5c07\u6301\u7e8c\u6383\u63cfRedis\u4e2d\u7684\u9375\uff0c\u76f4\u5230\u6e38\u6a19\u8fd4\u56de\u5230\u521d\u59cb\u503c 0<\/code>\u3002\u6bcf\u6b21\u6383\u63cf\u6642\uff0c\u5b83\u6703\u522a\u9664\u5339\u914d\u7684\u9375\uff0c\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u5167\u5b58\u548c\u6027\u80fd\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728Redis\u4e2d\u5be6\u73fe\u6279\u91cf\u6a21\u7cca\u522a\u9664\u5339\u914d\u9375\u7684\u904e\u7a0b\u4e2d\uff0c\u9078\u64c7\u5408\u9069\u7684\u547d\u4ee4\u81f3\u95dc\u91cd\u8981\u3002\u96d6\u7136 KEYS<\/code> \u547d\u4ee4\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u5728\u751f\u7522\u74b0\u5883\u4e2d\uff0c\u4f7f\u7528 SCAN<\/code> \u547d\u4ee4\u66f4\u70ba\u9ad8\u6548\u548c\u5b89\u5168\u3002\u901a\u904e\u9019\u4e9b\u65b9\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9748\u6d3b\u5730\u7ba1\u7406Redis\u4e2d\u7684\u6578\u64da\uff0c\u4fdd\u6301\u7cfb\u7d71\u7684\u9ad8\u6548\u904b\u884c\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\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5b58\u5132\u9084\u662f\u61c9\u7528\u90e8\u7f72\uff0c\u6211\u5011\u7684 \u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5be6\u73feRedis\u6279\u91cf\u6a21\u7cca\u522a\u9664\u5339\u914dkey\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u6e05\u9664\u904e\u671f\u6216\u4e0d\u9700\u8981\u7684\u9375\u503c\u64cd\u4f5c\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-170579","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170579","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=170579"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170579\/revisions"}],"predecessor-version":[{"id":170580,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170579\/revisions\/170580"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=170579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=170579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=170579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}