{"id":201200,"date":"2025-05-10T08:49:15","date_gmt":"2025-05-10T00:49:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201200\/"},"modified":"2025-05-10T08:49:15","modified_gmt":"2025-05-10T00:49:15","slug":"%e6%b5%85%e8%b0%88redis%e7%9a%84keys%e5%91%bd%e4%bb%a4%e5%88%b0%e5%ba%95%e6%9c%89%e5%a4%9a%e6%85%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201200\/","title":{"rendered":"\u6d45\u8c08Redis\u7684keys\u547d\u4ee4\u5230\u5e95\u6709\u591a\u6162"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u6d45\u8c08Redis\u7684keys\u547d\u4ee4\u5230\u5e95\u6709\u591a\u6162<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u600e\u4e48\u5165\u95e8\u6570\u636e\u5e93\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762golang\u5b66\u4e60\u7f51\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u6d45\u8c08Redis\u7684keys\u547d\u4ee4\u5230\u5e95\u6709\u591a\u6162\u300b\uff0c\u6d89\u53ca\u5230Rediskeys\u547d\u4ee4\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n<p>keys\u547d\u4ee4\u7684\u7528\u6cd5\uff1a<\/p>\n<pre>\nkeys pattern<\/pre>\n<p>\u67e5\u627e\u7b26\u5408\u6b63\u5219\u5339\u914d\u7684key\u7684\u5217\u8868\u3002\u626b\u63cf\u5bf9\u8c61\u662fRedis\u670d\u52a1\u4e2d\u6240\u6709\u7684key\uff0c\u60f3\u60f3\u90fd\u5f88\u6162\u5bf9\u4e0d\u5bf9\uff1f<br \/> \u540c\u65f6\u6267\u884ckeys\u547d\u4ee4\u7684\u540c\u65f6\uff0cRedis\u8fdb\u7a0b\u5c06\u88ab\u963b\u585e\uff0c\u65e0\u6cd5\u6267\u884c\u5176\u4ed6\u547d\u4ee4\uff0c\u5047\u5982\u8d85\u8fc7\u4e86\u54e8\u5175\u7684<code>down-after-milliseconds<\/code>\u914d\u7f6e\uff0c\u8fd8\u4f1a\u8fdb\u884c\u4e3b\u4ece\u5207\u6362\uff0c\u5207\u6362\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u4e3b\u8282\u70b9\u6062\u590d\u6b63\u5e38\uff0c\u8fd8\u53ef\u80fd\u51fa\u73b0\u8111\u88c2\u7b49\u4e00\u7cfb\u5217\u95ee\u9898\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u5efa\u8bae\u76f4\u63a5\u7981\u7528keys\u547d\u4ee4\u3002<\/p>\n<h2>Keys\u547d\u4ee4\u7684\u66ff\u4ee3\u65b9\u6848<\/h2>\n<p>1\u3001scan\u626b\u63cf\uff0c\u907f\u514d\u963b\u585e<br \/> 2\u3001\u5c06\u9700\u8981\u7edf\u8ba1\u7684\u6570\u636e\u653e\u5165\u4e00\u4e2aset\u4e2d \uff08\u4f46\u662f\u8fd9\u6837\u53ef\u80fd\u51fa\u73b0Big Key\u95ee\u9898\uff0c\u4e00\u822c\u6570\u636e\u91cf\u5927\u5c31\u4e0d\u63a8\u8350\uff09<\/p>\n<h2>Keys\u547d\u4ee4\u5728Redis Cluster\u4e2d\u662f\u600e\u6837\u6267\u884c\u7684\uff1f<\/h2>\n<p>\u4e00\u822c\u6765\u8bf4\uff0ckeys\u547d\u4ee4\u5bf9\u4e8e\u96c6\u7fa4\u8282\u70b9\u6765\u8bf4\uff0c\u662f\u4e0d\u77e5\u9053\u8def\u7531\u5230\u54ea\u4e2a\u8282\u70b9\u7684\uff0c\u4e0d\u50cf get\u547d\u4ee4\u3002\u5728Java\u7684Jedis\u5ba2\u6237\u7aef\u7684<code>JedisClusterKeyCommands<\/code>\u7c7b\u4e2d\uff0c\u6211\u4eec\u770b\u5230\uff1a<\/p>\n<pre>\n\tpublic Set\n   \n     keys(byte[] pattern) {\n\t\t\/\/ \u5728\u6bcf\u4e2a\u8282\u70b9\u6267\u884ckeys\u547d\u4ee4\n\t\tCollection\n    \n     &gt; keysPerNode = connection.getClusterCommandExecutor() .executeCommandOnAllNodes((JedisClusterCommandCallback\n     \n      &gt;) client -&gt; client.keys(pattern)) .resultsAsList(); \/\/ \u5408\u5e76\u6210\u4e00\u4e2a\u6574\u4f53\u540e\u8fd4\u56de Set\n      \n        keys = new HashSet(); for (Set\n       \n         keySet : keysPerNode) { keys.addAll(keySet); } return keys; } \n       \n      \n     \n    \n   <\/pre>\n<p>\u6211\u4eec\u770b\u5230\uff0cJedis\u662f\u901a\u8fc7\u5728\u6bcf\u4e2a\u8282\u70b9\u4e0a\u6267\u884ckeys\u547d\u4ee4\uff0c\u5e76\u5c06\u7ed3\u679c\u5408\u5e76\u8fd4\u56de\u7684\u3002<\/p>\n<p>\u672c\u6587\u65e2\u7136\u5c06keys\u547d\u4ee4\u7684\u6162\uff0c\u90a3\u4e48\u4ed6\u5230\u5e95\u6709\u591a\u6162\u5462\uff1f<\/p>\n<p>Keys\u547d\u4ee4\u5230\u5e95\u6709\u591a\u6162\uff1f<\/p>\n<p>\u8fd9\u91cc\u4e3b\u8981\u662f\u7ed9\u5927\u5bb6\u4e00\u4e2a\u57fa\u672c\u7684\u6982\u5ff5\uff0c\u5e76\u4e0d\u662f\u6df1\u5165\u5256\u6790\u3002<\/p>\n<p style=\"text-align: center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167246282863afc1ecbe28b.jpg\" class=\"aligncenter\"><\/p>\n<p>\u8fd9\u662f\u817e\u8baf\u4e91\u4e0aRedis\u96c6\u7fa4\u670d\u52a1\u4e2d\uff0c\u6162\u67e5\u8be2\u7684\u65e5\u5fd7\u3002\u6211\u4eec\u770b\u5230\uff0cKeys\u547d\u4ee4\u5927\u6982\u6267\u884c\u4e86<code>250ms ~ 300ms\u3002<\/code><\/p>\n<p style=\"text-align: center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20221231\/167246282863afc1ecefa6c.jpg\" class=\"aligncenter\"><\/p>\n<p>\u6839\u636e\u8282\u70b9\u4fe1\u606f\uff0c\u6211\u4eec\u770b\u5230\uff0c\u6bcf\u4e2a\u8282\u70b9\u5b58\u50a8\u4e86<code>\u5927\u7ea6153w\u7684key<\/code>\uff0c\u5360\u7528\u5185\u5b58<code>300M+<\/code>\uff0c\u5e73\u5747\u6bcf\u4e2a\u952e\u503c\u5bf9\u5360\u7528\u5185\u5b58<code>0.208KB<\/code>\uff0c\u5408<code>213\u4e2a\u5b57\u8282<\/code>\u3002<\/p>\n<p>\u6839\u636e\u6211\u7684\u7406\u89e3\uff0c\u65e2\u7136keys\u547d\u4ee4\u8fd4\u56de\u7684\u662fkey\u503c\uff0c\u800c\u96c6\u7fa4\u4e2d\u5176\u5b9e\u6709\u4e00\u4e2a\u7ed3\u6784<code>slots_to_keys<\/code> \u8bb0\u5f55\u7740\u6240\u6709key \u7684, \u8fd9\u53ea\u4e0ekey\u7684\u6570\u91cf\u6709\u5173\uff0c\u4e0eBig key\u7684\u5173\u7cfb\u4e0d\u5927\u3002<\/p>\n<p>\u6309\u7167\u8fd9\u79cd\u731c\u60f3\uff0c\u5047\u5982\u6b64\u65f6Redis\u8282\u70b9\u5360\u7528\u5185\u5b58\u4e3a3G\uff0c\u4e14Key\u6570\u91cf\u6210\u6bd4\u4f8b\uff0c\u90a3\u4e48Keys\u547d\u4ee4\u6267\u884c\u65f6\u95f4\u56e0\u4e3a3s\u5de6\u53f3\uff0c\u8fd9\u6bb5\u65f6\u95f4Redis\u8282\u70b9\u662f\u963b\u585e\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6d45\u8c08Redis\u7684keys\u547d\u4ee4\u5230\u5e95&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201200","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201200","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201200"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201200\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}