{"id":10007068,"date":"2023-01-11T14:15:52","date_gmt":"2023-01-11T06:15:52","guid":{"rendered":"https:\/\/ityet.com\/?p=10007068"},"modified":"2023-01-11T14:15:52","modified_gmt":"2023-01-11T06:15:52","slug":"1-5%e4%b8%87%e5%ad%97%e6%80%bb%e7%bb%93-redis-%e5%b8%b8%e8%a7%81%e9%9d%a2%e8%af%95%e9%a2%98%e7%9f%a5%e8%af%86%e7%82%b9","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10007068","title":{"rendered":"1.5\u4e07\u5b57\u603b\u7ed3 Redis \u5e38\u89c1\u9762\u8bd5\u9898&amp;\u77e5\u8bc6\u70b9"},"content":{"rendered":"<blockquote><p>\u4ee5\u4e0b\u5185\u5bb9\u6765\u6e90\u4e8e\u4e8e\u6211\u5f00\u6e90\u7684 <a href=\"https:\/\/link.segmentfault.com\/?enc=zPNF8gkDq6z%2Bgekzd1xmQA%3D%3D.xoJs4vh6u0iJtOy5AtECG5FKLYqG5UxA7GkyhnL%2Bk3k%3D\" rel=\"nofollow\">JavaGuide<\/a> \uff08Java\u5b66\u4e60&#038;&#038;\u9762\u8bd5\u6307\u5357\uff0cGithub 130k star,370\u4eba\u5171\u540c\u53c2\u4e0e\u7231\u5b8c\u5584\uff09, \u4e07\u5b57\u603b\u7ed3\uff0c\u8d28\u91cf\u6709\u4fdd\u969c\uff01<\/p><\/blockquote>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u6700\u65e9\u5199\u4e8e2019\u5e74\uff0c\u7ecf\u8fc7\u4e0d\u65ad\u5b8c\u5584\uff0c\u5185\u5bb9\u4e5f\u66f4\u5168\u9762\u4e86\uff0c\u91cc\u9762\u7684\u5f88\u591a\u5185\u5bb9\u4e5f\u88ab\u5f88\u591a\u4eba\u53c2\u8003\u501f\u9274\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302895\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2>Redis \u57fa\u7840<\/h2>\n<h3>\u4ec0\u4e48\u662f Redis\uff1f<\/h3>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=Qbb3Lst6Gp%2Bi1VmSid8f8Q%3D%3D.lHGhbemC2BtEe%2BB5LfafTwFtiDqfyGM7%2BQuG1b8DoaU%3D\" rel=\"nofollow\">Redis<\/a> \u662f\u4e00\u4e2a\u57fa\u4e8e C \u8bed\u8a00\u5f00\u53d1\u7684\u5f00\u6e90\u6570\u636e\u5e93\uff08BSD \u8bb8\u53ef\uff09\uff0c\u4e0e\u4f20\u7edf\u6570\u636e\u5e93\u4e0d\u540c\u7684\u662f Redis \u7684\u6570\u636e\u662f\u5b58\u5728\u5185\u5b58\u4e2d\u7684\uff08\u5185\u5b58\u6570\u636e\u5e93\uff09\uff0c\u8bfb\u5199\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7f13\u5b58\u65b9\u5411\u3002\u5e76\u4e14\uff0cRedis \u5b58\u50a8\u7684\u662f KV \u952e\u503c\u5bf9\u6570\u636e\u3002<\/p>\n<p>\u4e3a\u4e86\u6ee1\u8db3\u4e0d\u540c\u7684\u4e1a\u52a1\u573a\u666f\uff0cRedis \u5185\u7f6e\u4e86\u591a\u79cd\u6570\u636e\u7c7b\u578b\u5b9e\u73b0\uff08\u6bd4\u5982 String\u3001Hash\u3001Sorted Set\u3001Bitmap\uff09\u3002\u5e76\u4e14\uff0cRedis \u8fd8\u652f\u6301\u4e8b\u52a1 \u3001\u6301\u4e45\u5316\u3001Lua \u811a\u672c\u3001\u591a\u79cd\u5f00\u7bb1\u5373\u7528\u7684\u96c6\u7fa4\u65b9\u6848\uff08Redis Sentinel\u3001Redis Cluster\uff09\u3002<\/p>\n<p>Redis \u6ca1\u6709\u5916\u90e8\u4f9d\u8d56\uff0cLinux \u548c OS X \u662f Redis \u5f00\u53d1\u548c\u6d4b\u8bd5\u6700\u591a\u7684\u4e24\u4e2a\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5b98\u65b9\u63a8\u8350\u751f\u4ea7\u73af\u5883\u4f7f\u7528 Linux \u90e8\u7f72 Redis\u3002<\/p>\n<p>\u4e2a\u4eba\u5b66\u4e60\u7684\u8bdd\uff0c\u4f60\u53ef\u4ee5\u81ea\u5df1\u672c\u673a\u5b89\u88c5 Redis \u6216\u8005\u901a\u8fc7 Redis \u5b98\u7f51\u63d0\u4f9b\u7684<a href=\"https:\/\/link.segmentfault.com\/?enc=5sW4p2chNEzyonanya0JXA%3D%3D.PSp9UaqW5xkXX4RlGijUIIrN%2Fneq2PdgXLqUMn3eRAw%3D\" rel=\"nofollow\">\u5728\u7ebf Redis \u73af\u5883<\/a>\u6765\u5b9e\u9645\u4f53\u9a8c Redis\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302896\" alt=\"try-redis\" title=\"try-redis\" loading=\"lazy\"><\/p>\n<p>\u5168\u4e16\u754c\u6709\u975e\u5e38\u591a\u7684\u7f51\u7ad9\u4f7f\u7528\u5230\u4e86 Redis \uff0c<a href=\"https:\/\/link.segmentfault.com\/?enc=Qq0rnoc8jJvhMXBaekcriQ%3D%3D.%2BuzOLTBwHuMcx%2F%2FTOA82yE7GjxQaZzSiKO%2FuKY0HA9A%3D\" rel=\"nofollow\">techstacks.io<\/a> \u4e13\u95e8\u7ef4\u62a4\u4e86\u4e00\u4e2a<a href=\"https:\/\/link.segmentfault.com\/?enc=cDj%2BOA8A5WQY%2BxDANx%2Fe8A%3D%3D.xGVnOCnkt2n5l8w%2FUokjziJOet2oCdZTkhRBr1QC71U368CTgckeFIGs00ntRyMw\" rel=\"nofollow\">\u4f7f\u7528 Redis \u7684\u70ed\u95e8\u7ad9\u70b9\u5217\u8868<\/a> \uff0c\u611f\u5174\u8da3\u7684\u8bdd\u53ef\u4ee5\u770b\u770b\u3002<\/p>\n<h3>Redis \u4e3a\u4ec0\u4e48\u8fd9\u4e48\u5feb\uff1f<\/h3>\n<p>Redis \u5185\u90e8\u505a\u4e86\u975e\u5e38\u591a\u7684\u6027\u80fd\u4f18\u5316\uff0c\u6bd4\u8f83\u91cd\u8981\u7684\u4e3b\u8981\u6709\u4e0b\u9762 3 \u70b9\uff1a<\/p>\n<ul>\n<li>Redis \u57fa\u4e8e\u5185\u5b58\uff0c\u5185\u5b58\u7684\u8bbf\u95ee\u901f\u5ea6\u662f\u78c1\u76d8\u7684\u4e0a\u5343\u500d\uff1b<\/li>\n<li>Redis \u57fa\u4e8e Reactor \u6a21\u5f0f\u8bbe\u8ba1\u5f00\u53d1\u4e86\u4e00\u5957\u9ad8\u6548\u7684\u4e8b\u4ef6\u5904\u7406\u6a21\u578b\uff0c\u4e3b\u8981\u662f\u5355\u7ebf\u7a0b\u4e8b\u4ef6\u5faa\u73af\u548c IO \u591a\u8def\u590d\u7528\uff08Redis \u7ebf\u7a0b\u6a21\u5f0f\u540e\u9762\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u5230\uff09\uff1b<\/li>\n<li>Redis \u5185\u7f6e\u4e86\u591a\u79cd\u4f18\u5316\u8fc7\u540e\u7684\u6570\u636e\u7ed3\u6784\u5b9e\u73b0\uff0c\u6027\u80fd\u975e\u5e38\u9ad8\u3002<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u8fd9\u5f20\u56fe\u7247\u603b\u7ed3\u7684\u633a\u4e0d\u9519\u7684\uff0c\u5206\u4eab\u4e00\u4e0b\uff0c\u51fa\u81ea <a href=\"https:\/\/link.segmentfault.com\/?enc=4DviIZaK4mLfa67oP54CzA%3D%3D.dII4lt8lLnwb95UPIoiVIUJHOh3GKR1j971HfD28fvYKDrAA3yX7%2FVw64VPbsIykAJjBxxt8Be%2F6owjqQQRKpQ%3D%3D\" rel=\"nofollow\">Why is Redis so fast?<\/a> \u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302897\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" title=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" loading=\"lazy\"><\/p>\n<h3>\u5206\u5e03\u5f0f\u7f13\u5b58\u5e38\u89c1\u7684\u6280\u672f\u9009\u578b\u65b9\u6848\u6709\u54ea\u4e9b\uff1f<\/h3>\n<p>\u5206\u5e03\u5f0f\u7f13\u5b58\u7684\u8bdd\uff0c\u6bd4\u8f83\u8001\u724c\u540c\u65f6\u4e5f\u662f\u4f7f\u7528\u7684\u6bd4\u8f83\u591a\u7684\u8fd8\u662f <strong>Memcached<\/strong> \u548c <strong>Redis<\/strong>\u3002\u4e0d\u8fc7\uff0c\u73b0\u5728\u57fa\u672c\u6ca1\u6709\u770b\u8fc7\u8fd8\u6709\u9879\u76ee\u4f7f\u7528 <strong>Memcached<\/strong> \u6765\u505a\u7f13\u5b58\uff0c\u90fd\u662f\u76f4\u63a5\u7528 <strong>Redis<\/strong>\u3002<\/p>\n<p>Memcached \u662f\u5206\u5e03\u5f0f\u7f13\u5b58\u6700\u5f00\u59cb\u5174\u8d77\u7684\u90a3\u4f1a\uff0c\u6bd4\u8f83\u5e38\u7528\u7684\u3002\u540e\u6765\uff0c\u968f\u7740 Redis \u7684\u53d1\u5c55\uff0c\u5927\u5bb6\u6162\u6162\u90fd\u8f6c\u800c\u4f7f\u7528\u66f4\u52a0\u5f3a\u5927\u7684 Redis \u4e86\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u817e\u8baf\u4e5f\u5f00\u6e90\u4e86\u4e00\u6b3e\u7c7b\u4f3c\u4e8e Redis \u7684\u5206\u5e03\u5f0f\u9ad8\u6027\u80fd KV \u5b58\u50a8\u6570\u636e\u5e93\uff0c\u57fa\u4e8e\u77e5\u540d\u7684\u5f00\u6e90\u9879\u76ee <a href=\"https:\/\/link.segmentfault.com\/?enc=V6pkCVZ9cnVmaeO4ScXMEA%3D%3D.ucvtXBnB7Q3YTUsQJwGPb%2BCtROEo%2FUIKHKe8ARdDLTmM5s9ZoO9Ug0tQ4rU8aZvc\" rel=\"nofollow\">RocksDB<\/a> \u4f5c\u4e3a\u5b58\u50a8\u5f15\u64ce \uff0c100% \u517c\u5bb9 Redis \u534f\u8bae\u548c Redis4.0 \u6240\u6709\u6570\u636e\u6a21\u578b\uff0c\u540d\u4e3a <a href=\"https:\/\/link.segmentfault.com\/?enc=OcRCcFYe10BxuJKBG7HvjA%3D%3D.Lm2qPasuqLKk04QvOXO1HhjUi8CKnFeQX0kiIfSfi4sV%2F8tzgi5QPWgdIDCOqo9F\" rel=\"nofollow\">Tendis<\/a>\u3002<\/p>\n<p>\u5173\u4e8e Redis \u548c Tendis \u7684\u5bf9\u6bd4\uff0c\u817e\u8baf\u5b98\u65b9\u66fe\u7ecf\u53d1\u8fc7\u4e00\u7bc7\u6587\u7ae0\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=MQCmHUnS%2B8dG8ZM6JT1gvg%3D%3D.GTTEt6p%2BMaTnKZh6Hx%2B2gVD1ySKMjGmJ430iylIWgY7Si7aqfJoZJinTiujgjYQWGbXiOn20uLzJhbO3fJNQQw%3D%3D\" rel=\"nofollow\">Redis vs Tendis\uff1a\u51b7\u70ed\u6df7\u5408\u5b58\u50a8\u7248\u67b6\u6784\u63ed\u79d8<\/a> \uff0c\u53ef\u4ee5\u7b80\u5355\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n<p>\u4ece\u8fd9\u4e2a\u9879\u76ee\u7684 Github \u63d0\u4ea4\u8bb0\u5f55\u53ef\u4ee5\u770b\u51fa\uff0cTendis \u5f00\u6e90\u7248\u51e0\u4e4e\u5df2\u7ecf\u6ca1\u6709\u88ab\u7ef4\u62a4\u66f4\u65b0\u4e86\uff0c\u52a0\u4e0a\u5176\u5173\u6ce8\u5ea6\u5e76\u4e0d\u9ad8\uff0c\u4f7f\u7528\u7684\u516c\u53f8\u4e5f\u6bd4\u8f83\u5c11\u3002\u56e0\u6b64\uff0c\u4e0d\u5efa\u8bae\u4f60\u4f7f\u7528 Tendis \u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u3002<\/p>\n<h3>\u8bf4\u4e00\u4e0b Redis \u548c Memcached \u7684\u533a\u522b\u548c\u5171\u540c\u70b9<\/h3>\n<p>\u73b0\u5728\u516c\u53f8\u4e00\u822c\u90fd\u662f\u7528 Redis \u6765\u5b9e\u73b0\u7f13\u5b58\uff0c\u800c\u4e14 Redis \u81ea\u8eab\u4e5f\u8d8a\u6765\u8d8a\u5f3a\u5927\u4e86\uff01\u4e0d\u8fc7\uff0c\u4e86\u89e3 Redis \u548c Memcached \u7684\u533a\u522b\u548c\u5171\u540c\u70b9\uff0c\u6709\u52a9\u4e8e\u6211\u4eec\u5728\u505a\u76f8\u5e94\u7684\u6280\u672f\u9009\u578b\u7684\u65f6\u5019\uff0c\u80fd\u591f\u505a\u5230\u6709\u7406\u6709\u636e\uff01<\/p>\n<p><strong>\u5171\u540c\u70b9<\/strong> \uff1a<\/p>\n<ol>\n<li>\u90fd\u662f\u57fa\u4e8e\u5185\u5b58\u7684\u6570\u636e\u5e93\uff0c\u4e00\u822c\u90fd\u7528\u6765\u5f53\u505a\u7f13\u5b58\u4f7f\u7528\u3002<\/li>\n<li>\u90fd\u6709\u8fc7\u671f\u7b56\u7565\u3002<\/li>\n<li>\u4e24\u8005\u7684\u6027\u80fd\u90fd\u975e\u5e38\u9ad8\u3002<\/li>\n<\/ol>\n<p><strong>\u533a\u522b<\/strong> \uff1a<\/p>\n<ol>\n<li><strong>Redis \u652f\u6301\u66f4\u4e30\u5bcc\u7684\u6570\u636e\u7c7b\u578b\uff08\u652f\u6301\u66f4\u590d\u6742\u7684\u5e94\u7528\u573a\u666f\uff09<\/strong>\u3002Redis \u4e0d\u4ec5\u4ec5\u652f\u6301\u7b80\u5355\u7684 k\/v \u7c7b\u578b\u7684\u6570\u636e\uff0c\u540c\u65f6\u8fd8\u63d0\u4f9b list\uff0cset\uff0czset\uff0chash \u7b49\u6570\u636e\u7ed3\u6784\u7684\u5b58\u50a8\u3002Memcached \u53ea\u652f\u6301\u6700\u7b80\u5355\u7684 k\/v \u6570\u636e\u7c7b\u578b\u3002<\/li>\n<li><strong>Redis \u652f\u6301\u6570\u636e\u7684\u6301\u4e45\u5316\uff0c\u53ef\u4ee5\u5c06\u5185\u5b58\u4e2d\u7684\u6570\u636e\u4fdd\u6301\u5728\u78c1\u76d8\u4e2d\uff0c\u91cd\u542f\u7684\u65f6\u5019\u53ef\u4ee5\u518d\u6b21\u52a0\u8f7d\u8fdb\u884c\u4f7f\u7528,\u800c Memcached \u628a\u6570\u636e\u5168\u90e8\u5b58\u5728\u5185\u5b58\u4e4b\u4e2d\u3002<\/strong><\/li>\n<li><strong>Redis \u6709\u707e\u96be\u6062\u590d\u673a\u5236\u3002<\/strong> \u56e0\u4e3a\u53ef\u4ee5\u628a\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u6301\u4e45\u5316\u5230\u78c1\u76d8\u4e0a\u3002<\/li>\n<li><strong>Redis \u5728\u670d\u52a1\u5668\u5185\u5b58\u4f7f\u7528\u5b8c\u4e4b\u540e\uff0c\u53ef\u4ee5\u5c06\u4e0d\u7528\u7684\u6570\u636e\u653e\u5230\u78c1\u76d8\u4e0a\u3002\u4f46\u662f\uff0cMemcached \u5728\u670d\u52a1\u5668\u5185\u5b58\u4f7f\u7528\u5b8c\u4e4b\u540e\uff0c\u5c31\u4f1a\u76f4\u63a5\u62a5\u5f02\u5e38\u3002<\/strong><\/li>\n<li><strong>Memcached \u6ca1\u6709\u539f\u751f\u7684\u96c6\u7fa4\u6a21\u5f0f\uff0c\u9700\u8981\u4f9d\u9760\u5ba2\u6237\u7aef\u6765\u5b9e\u73b0\u5f80\u96c6\u7fa4\u4e2d\u5206\u7247\u5199\u5165\u6570\u636e\uff1b\u4f46\u662f Redis \u76ee\u524d\u662f\u539f\u751f\u652f\u6301 cluster \u6a21\u5f0f\u7684\u3002<\/strong><\/li>\n<li><strong>Memcached \u662f\u591a\u7ebf\u7a0b\uff0c\u975e\u963b\u585e IO \u590d\u7528\u7684\u7f51\u7edc\u6a21\u578b\uff1bRedis \u4f7f\u7528\u5355\u7ebf\u7a0b\u7684\u591a\u8def IO \u590d\u7528\u6a21\u578b\u3002<\/strong> \uff08Redis 6.0 \u5f15\u5165\u4e86\u591a\u7ebf\u7a0b IO \uff09<\/li>\n<li><strong>Redis \u652f\u6301\u53d1\u5e03\u8ba2\u9605\u6a21\u578b\u3001Lua \u811a\u672c\u3001\u4e8b\u52a1\u7b49\u529f\u80fd\uff0c\u800c Memcached \u4e0d\u652f\u6301\u3002\u5e76\u4e14\uff0cRedis \u652f\u6301\u66f4\u591a\u7684\u7f16\u7a0b\u8bed\u8a00\u3002<\/strong><\/li>\n<li><strong>Memcached \u8fc7\u671f\u6570\u636e\u7684\u5220\u9664\u7b56\u7565\u53ea\u7528\u4e86\u60f0\u6027\u5220\u9664\uff0c\u800c Redis \u540c\u65f6\u4f7f\u7528\u4e86\u60f0\u6027\u5220\u9664\u4e0e\u5b9a\u671f\u5220\u9664\u3002<\/strong><\/li>\n<\/ol>\n<p>\u76f8\u4fe1\u770b\u4e86\u4e0a\u9762\u7684\u5bf9\u6bd4\u4e4b\u540e\uff0c\u6211\u4eec\u5df2\u7ecf\u6ca1\u6709\u4ec0\u4e48\u7406\u7531\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528 Memcached \u6765\u4f5c\u4e3a\u81ea\u5df1\u9879\u76ee\u7684\u5206\u5e03\u5f0f\u7f13\u5b58\u4e86\u3002<\/p>\n<h3>\u4e3a\u4ec0\u4e48\u8981\u7528 Redis\/\u4e3a\u4ec0\u4e48\u8981\u7528\u7f13\u5b58\uff1f<\/h3>\n<p>\u4e0b\u9762\u6211\u4eec\u4e3b\u8981\u4ece\u201c\u9ad8\u6027\u80fd\u201d\u548c\u201c\u9ad8\u5e76\u53d1\u201d\u8fd9\u4e24\u70b9\u6765\u56de\u7b54\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<p><strong>\u9ad8\u6027\u80fd<\/strong><\/p>\n<p>\u5047\u5982\u7528\u6237\u7b2c\u4e00\u6b21\u8bbf\u95ee\u6570\u636e\u5e93\u4e2d\u7684\u67d0\u4e9b\u6570\u636e\u7684\u8bdd\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u6bd4\u8f83\u6162\uff0c\u6bd5\u7adf\u662f\u4ece\u786c\u76d8\u4e2d\u8bfb\u53d6\u7684\u3002\u4f46\u662f\uff0c\u5982\u679c\u8bf4\uff0c\u7528\u6237\u8bbf\u95ee\u7684\u6570\u636e\u5c5e\u4e8e\u9ad8\u9891\u6570\u636e\u5e76\u4e14\u4e0d\u4f1a\u7ecf\u5e38\u6539\u53d8\u7684\u8bdd\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u5f88\u653e\u5fc3\u5730\u5c06\u8be5\u7528\u6237\u8bbf\u95ee\u7684\u6570\u636e\u5b58\u5728\u7f13\u5b58\u4e2d\u3002<\/p>\n<p><strong>\u8fd9\u6837\u6709\u4ec0\u4e48\u597d\u5904\u5462\uff1f<\/strong> \u90a3\u5c31\u662f\u4fdd\u8bc1\u7528\u6237\u4e0b\u4e00\u6b21\u518d\u8bbf\u95ee\u8fd9\u4e9b\u6570\u636e\u7684\u65f6\u5019\u5c31\u53ef\u4ee5\u76f4\u63a5\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u4e86\u3002\u64cd\u4f5c\u7f13\u5b58\u5c31\u662f\u76f4\u63a5\u64cd\u4f5c\u5185\u5b58\uff0c\u6240\u4ee5\u901f\u5ea6\u76f8\u5f53\u5feb\u3002<\/p>\n<p><strong>\u9ad8\u5e76\u53d1<\/strong><\/p>\n<p>\u4e00\u822c\u50cf MySQL \u8fd9\u7c7b\u7684\u6570\u636e\u5e93\u7684 QPS \u5927\u6982\u90fd\u5728 1w \u5de6\u53f3\uff084 \u6838 8g\uff09 \uff0c\u4f46\u662f\u4f7f\u7528 Redis \u7f13\u5b58\u4e4b\u540e\u5f88\u5bb9\u6613\u8fbe\u5230 10w+\uff0c\u751a\u81f3\u6700\u9ad8\u80fd\u8fbe\u5230 30w+\uff08\u5c31\u5355\u673a Redis \u7684\u60c5\u51b5\uff0cRedis \u96c6\u7fa4\u7684\u8bdd\u4f1a\u66f4\u9ad8\uff09\u3002<\/p>\n<blockquote><p>QPS\uff08Query Per Second\uff09\uff1a\u670d\u52a1\u5668\u6bcf\u79d2\u53ef\u4ee5\u6267\u884c\u7684\u67e5\u8be2\u6b21\u6570\uff1b<\/p><\/blockquote>\n<p>\u7531\u6b64\u53ef\u89c1\uff0c\u76f4\u63a5\u64cd\u4f5c\u7f13\u5b58\u80fd\u591f\u627f\u53d7\u7684\u6570\u636e\u5e93\u8bf7\u6c42\u6570\u91cf\u662f\u8fdc\u8fdc\u5927\u4e8e\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u5e93\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u8003\u8651\u628a\u6570\u636e\u5e93\u4e2d\u7684\u90e8\u5206\u6570\u636e\u8f6c\u79fb\u5230\u7f13\u5b58\u4e2d\u53bb\uff0c\u8fd9\u6837\u7528\u6237\u7684\u4e00\u90e8\u5206\u8bf7\u6c42\u4f1a\u76f4\u63a5\u5230\u7f13\u5b58\u8fd9\u91cc\u800c\u4e0d\u7528\u7ecf\u8fc7\u6570\u636e\u5e93\u3002\u8fdb\u800c\uff0c\u6211\u4eec\u4e5f\u5c31\u63d0\u9ad8\u4e86\u7cfb\u7edf\u6574\u4f53\u7684\u5e76\u53d1\u3002<\/p>\n<h3>Redis \u9664\u4e86\u505a\u7f13\u5b58\uff0c\u8fd8\u80fd\u505a\u4ec0\u4e48\uff1f<\/h3>\n<ul>\n<li><strong>\u5206\u5e03\u5f0f\u9501<\/strong> \uff1a \u901a\u8fc7 Redis \u6765\u505a\u5206\u5e03\u5f0f\u9501\u662f\u4e00\u79cd\u6bd4\u8f83\u5e38\u89c1\u7684\u65b9\u5f0f\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u90fd\u662f\u57fa\u4e8e Redisson \u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u3002\u5173\u4e8e Redis \u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u53ef\u4ee5\u770b\u6211\u5199\u7684\u8fd9\u7bc7\u6587\u7ae0\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=T4NomTFkwtMCKzJMu2QKHA%3D%3D.2JaTf61%2FQbTibSffw6%2BdpQTf4xWanw9NAIL5P4J4kK65%2BoXunffzWXYzHx6GnFzxRrlRb5zgKQst0EGxamloxg%3D%3D\" rel=\"nofollow\">\u5206\u5e03\u5f0f\u9501\u8be6\u89e3<\/a> \u3002<\/li>\n<li><strong>\u9650\u6d41<\/strong> \uff1a\u4e00\u822c\u662f\u901a\u8fc7 Redis + Lua \u811a\u672c\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u9650\u6d41\u3002\u76f8\u5173\u9605\u8bfb\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=XlCM4C4HMk61t%2FipOljh9g%3D%3D.t%2BmpF60djW%2FPw0r9kxcltMoSH4n1cGO2qvoJ5i8Za4u1i6lyGBftXnnp0AtwXcp751uWODjBW8JdPvZDNARbuw%3D%3D\" rel=\"nofollow\">\u300a\u6211\u53f8\u7528\u4e86 6 \u5e74\u7684 Redis \u5206\u5e03\u5f0f\u9650\u6d41\u5668\uff0c\u53ef\u4ee5\u8bf4\u662f\u975e\u5e38\u5389\u5bb3\u4e86\uff01\u300b<\/a>\u3002<\/li>\n<li><strong>\u6d88\u606f\u961f\u5217<\/strong> \uff1aRedis \u81ea\u5e26\u7684 list \u6570\u636e\u7ed3\u6784\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u7b80\u5355\u7684\u961f\u5217\u4f7f\u7528\u3002Redis 5.0 \u4e2d\u589e\u52a0\u7684 Stream \u7c7b\u578b\u7684\u6570\u636e\u7ed3\u6784\u66f4\u52a0\u9002\u5408\u7528\u6765\u505a\u6d88\u606f\u961f\u5217\u3002\u5b83\u6bd4\u8f83\u7c7b\u4f3c\u4e8e Kafka\uff0c\u6709\u4e3b\u9898\u548c\u6d88\u8d39\u7ec4\u7684\u6982\u5ff5\uff0c\u652f\u6301\u6d88\u606f\u6301\u4e45\u5316\u4ee5\u53ca ACK \u673a\u5236\u3002<\/li>\n<li><strong>\u590d\u6742\u4e1a\u52a1\u573a\u666f<\/strong> \uff1a\u901a\u8fc7 Redis \u4ee5\u53ca Redis \u6269\u5c55\uff08\u6bd4\u5982 Redisson\uff09\u63d0\u4f9b\u7684\u6570\u636e\u7ed3\u6784\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u5b8c\u6210\u5f88\u591a\u590d\u6742\u7684\u4e1a\u52a1\u573a\u666f\u6bd4\u5982\u901a\u8fc7 bitmap \u7edf\u8ba1\u6d3b\u8dc3\u7528\u6237\u3001\u901a\u8fc7 sorted set \u7ef4\u62a4\u6392\u884c\u699c\u3002<\/li>\n<li>&#8230;&#8230;<\/li>\n<\/ul>\n<h3>Redis \u53ef\u4ee5\u505a\u6d88\u606f\u961f\u5217\u4e48\uff1f<\/h3>\n<p>Redis 5.0 \u65b0\u589e\u52a0\u7684\u4e00\u4e2a\u6570\u636e\u7ed3\u6784 <code>Stream<\/code> \u53ef\u4ee5\u7528\u6765\u505a\u6d88\u606f\u961f\u5217\uff0c<code>Stream<\/code> \u652f\u6301\uff1a<\/p>\n<ul>\n<li>\u53d1\u5e03 \/ \u8ba2\u9605\u6a21\u5f0f<\/li>\n<li>\u6309\u7167\u6d88\u8d39\u8005\u7ec4\u8fdb\u884c\u6d88\u8d39<\/li>\n<li>\u6d88\u606f\u6301\u4e45\u5316\uff08 RDB \u548c AOF\uff09<\/li>\n<\/ul>\n<p>\u4e0d\u8fc7\uff0c\u548c\u4e13\u4e1a\u7684\u6d88\u606f\u961f\u5217\u76f8\u6bd4\uff0c\u8fd8\u662f\u6709\u5f88\u591a\u6b20\u7f3a\u7684\u5730\u65b9\u6bd4\u5982\u6d88\u606f\u4e22\u5931\u548c\u5806\u79ef\u95ee\u9898\u4e0d\u597d\u89e3\u51b3\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u901a\u5e38\u5efa\u8bae\u662f\u4e0d\u4f7f\u7528 Redis \u6765\u505a\u6d88\u606f\u961f\u5217\u7684\uff0c\u4f60\u5b8c\u5168\u53ef\u4ee5\u9009\u62e9\u5e02\u9762\u4e0a\u6bd4\u8f83\u6210\u719f\u7684\u4e00\u4e9b\u6d88\u606f\u961f\u5217\u6bd4\u5982 RocketMQ\u3001Kafka\u3002<\/p>\n<p>\u76f8\u5173\u6587\u7ae0\u63a8\u8350\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=ls3%2BLJod51xL1uzgWTJjow%3D%3D.EaW6siSlTryC42cfq2Oa3we%2BaJJ5SwTlMTaoMiYDw%2Fr55De6BpQikLegl%2BZZIIS698zNFu9MkMVOqSHJm4HOB0Z95lLpN1Ehle6FDWX%2F740%3D\" rel=\"nofollow\">Redis \u6d88\u606f\u961f\u5217\u7684\u4e09\u79cd\u65b9\u6848\uff08List\u3001Streams\u3001Pub\/Sub\uff09<\/a>\u3002<\/p>\n<h3>\u5982\u4f55\u57fa\u4e8e Redis \u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff1f<\/h3>\n<p>\u5173\u4e8e Redis \u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u53ef\u4ee5\u770b\u6211\u5199\u7684\u8fd9\u7bc7\u6587\u7ae0\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=8nlv%2FruOUM1OgYypmWgXWQ%3D%3D.t4EyDj%2FGBO1IuPxYpFPYrl5ObFO7f32siKbEz5etlZfEUsvAQ4mslh47Jm7Wik3MkajLghxarvFwa675hdd7YQ%3D%3D\" rel=\"nofollow\">\u5206\u5e03\u5f0f\u9501\u8be6\u89e3<\/a> \u3002<\/p>\n<h2>Redis \u6570\u636e\u7ed3\u6784<\/h2>\n<h3>Redis \u5e38\u7528\u7684\u6570\u636e\u7ed3\u6784\u6709\u54ea\u4e9b\uff1f<\/h3>\n<ul>\n<li><strong>5 \u79cd\u57fa\u7840\u6570\u636e\u7ed3\u6784<\/strong> \uff1aString\uff08\u5b57\u7b26\u4e32\uff09\u3001List\uff08\u5217\u8868\uff09\u3001Set\uff08\u96c6\u5408\uff09\u3001Hash\uff08\u6563\u5217\uff09\u3001Zset\uff08\u6709\u5e8f\u96c6\u5408\uff09\u3002<\/li>\n<li><strong>3 \u79cd\u7279\u6b8a\u6570\u636e\u7ed3\u6784<\/strong> \uff1aHyperLogLogs\uff08\u57fa\u6570\u7edf\u8ba1\uff09\u3001Bitmap \uff08\u4f4d\u5b58\u50a8\uff09\u3001Geospatial (\u5730\u7406\u4f4d\u7f6e)\u3002<\/li>\n<\/ul>\n<p>\u5173\u4e8e 5 \u79cd\u57fa\u7840\u6570\u636e\u7ed3\u6784\u7684\u8be6\u7ec6\u4ecb\u7ecd\u8bf7\u770b\u8fd9\u7bc7\u6587\u7ae0\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=4cvfIR%2FKKGFSGOlF9m6rwA%3D%3D.o%2FTYmazSmIYa3ZNiyAMyBPVJpWmQeA5u6akO45oLpgYDrvdgE0KGGUY2rU2EeHfQBGMDxMJ70lK9puMvz6%2F2EGVjs5KrKFHHcOUryKYDO%2Bo%3D\" rel=\"nofollow\">Redis 5 \u79cd\u57fa\u672c\u6570\u636e\u7ed3\u6784\u8be6\u89e3<\/a>\u3002<\/p>\n<p>\u5173\u4e8e 3 \u79cd\u7279\u6b8a\u6570\u636e\u7ed3\u6784\u7684\u8be6\u7ec6\u4ecb\u7ecd\u8bf7\u770b\u8fd9\u7bc7\u6587\u7ae0\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=QHGZ8HEG9yKf8tE6VG4MSg%3D%3D.HBgFW4wO6ininyxw83mrrkE%2FjkkK%2FdS7Hq5xDhKwVwTnaIX1%2BWxoQb6HF39P4cFV85w7IvteIAe83vc2JMOnBXtFQ7gv9R6JormSllQ7f5Y%3D\" rel=\"nofollow\">Redis 3 \u79cd\u7279\u6b8a\u6570\u636e\u7ed3\u6784\u8be6\u89e3<\/a>\u3002<\/p>\n<h3>String \u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f<\/h3>\n<ul>\n<li>\u5e38\u89c4\u6570\u636e\uff08\u6bd4\u5982 session\u3001token\u3001\u3001\u5e8f\u5217\u5316\u540e\u7684\u5bf9\u8c61\uff09\u7684\u7f13\u5b58\uff1b<\/li>\n<li>\u8ba1\u6570\u6bd4\u5982\u7528\u6237\u5355\u4f4d\u65f6\u95f4\u7684\u8bf7\u6c42\u6570\uff08\u7b80\u5355\u9650\u6d41\u53ef\u4ee5\u7528\u5230\uff09\u3001\u9875\u9762\u5355\u4f4d\u65f6\u95f4\u7684\u8bbf\u95ee\u6570\uff1b<\/li>\n<li>\u5206\u5e03\u5f0f\u9501(\u5229\u7528 <code>SETNX key value<\/code> \u547d\u4ee4\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u6700\u7b80\u6613\u7684\u5206\u5e03\u5f0f\u9501)\uff1b<\/li>\n<li>&#8230;&#8230;<\/li>\n<\/ul>\n<p>\u5173\u4e8e String \u7684\u8be6\u7ec6\u4ecb\u7ecd\u8bf7\u770b\u8fd9\u7bc7\u6587\u7ae0\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=KbkmiEpmzTg4u8%2BJ4c7hhQ%3D%3D.5UYOMENSHSpg5Fso4dMyojKnL9bGzQASvnKZkUiSsvdDI7FtBP%2BrEuvk055%2FjR8EDg5dnifqr5ta8R8UnJ8O2B8JCQ%2Biu9N7PBtbPMvUPB0%3D\" rel=\"nofollow\">Redis 5 \u79cd\u57fa\u672c\u6570\u636e\u7ed3\u6784\u8be6\u89e3<\/a>\u3002<\/p>\n<h3>String \u8fd8\u662f Hash \u5b58\u50a8\u5bf9\u8c61\u6570\u636e\u66f4\u597d\u5462\uff1f<\/h3>\n<ul>\n<li>String \u5b58\u50a8\u7684\u662f\u5e8f\u5217\u5316\u540e\u7684\u5bf9\u8c61\u6570\u636e\uff0c\u5b58\u653e\u7684\u662f\u6574\u4e2a\u5bf9\u8c61\u3002Hash \u662f\u5bf9\u5bf9\u8c61\u7684\u6bcf\u4e2a\u5b57\u6bb5\u5355\u72ec\u5b58\u50a8\uff0c\u53ef\u4ee5\u83b7\u53d6\u90e8\u5206\u5b57\u6bb5\u7684\u4fe1\u606f\uff0c\u4e5f\u53ef\u4ee5\u4fee\u6539\u6216\u8005\u6dfb\u52a0\u90e8\u5206\u5b57\u6bb5\uff0c\u8282\u7701\u7f51\u7edc\u6d41\u91cf\u3002\u5982\u679c\u5bf9\u8c61\u4e2d\u67d0\u4e9b\u5b57\u6bb5\u9700\u8981\u7ecf\u5e38\u53d8\u52a8\u6216\u8005\u7ecf\u5e38\u9700\u8981\u5355\u72ec\u67e5\u8be2\u5bf9\u8c61\u4e2d\u7684\u4e2a\u522b\u5b57\u6bb5\u4fe1\u606f\uff0cHash \u5c31\u975e\u5e38\u9002\u5408\u3002<\/li>\n<li>String \u5b58\u50a8\u76f8\u5bf9\u6765\u8bf4\u66f4\u52a0\u8282\u7701\u5185\u5b58\uff0c\u7f13\u5b58\u76f8\u540c\u6570\u91cf\u7684\u5bf9\u8c61\u6570\u636e\uff0cString \u6d88\u8017\u7684\u5185\u5b58\u7ea6\u662f Hash \u7684\u4e00\u534a\u3002\u5e76\u4e14\uff0c\u5b58\u50a8\u5177\u6709\u591a\u5c42\u5d4c\u5957\u7684\u5bf9\u8c61\u65f6\u4e5f\u65b9\u4fbf\u5f88\u591a\u3002\u5982\u679c\u7cfb\u7edf\u5bf9\u6027\u80fd\u548c\u8d44\u6e90\u6d88\u8017\u975e\u5e38\u654f\u611f\u7684\u8bdd\uff0cString \u5c31\u975e\u5e38\u9002\u5408\u3002<\/li>\n<\/ul>\n<p>\u5728\u7edd\u5927\u90e8\u5206\u60c5\u51b5\uff0c\u6211\u4eec\u5efa\u8bae\u4f7f\u7528 String \u6765\u5b58\u50a8\u5bf9\u8c61\u6570\u636e\u5373\u53ef\uff01<\/p>\n<h3>String \u7684\u5e95\u5c42\u5b9e\u73b0\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>Redis \u662f\u57fa\u4e8e C \u8bed\u8a00\u7f16\u5199\u7684\uff0c\u4f46 Redis \u7684 String \u7c7b\u578b\u7684\u5e95\u5c42\u5b9e\u73b0\u5e76\u4e0d\u662f C \u8bed\u8a00\u4e2d\u7684\u5b57\u7b26\u4e32\uff08\u5373\u4ee5\u7a7a\u5b57\u7b26 <code>\/0<\/code> \u7ed3\u5c3e\u7684\u5b57\u7b26\u6570\u7ec4\uff09\uff0c\u800c\u662f\u81ea\u5df1\u7f16\u5199\u4e86 <a href=\"https:\/\/link.segmentfault.com\/?enc=2PtxEZOuA9BU%2FeGyV92lfA%3D%3D.8xjhugkhNfaOXQQaWqsup%2FzrTkdjvZRC3OkZ%2Flkl%2FmY%3D\" rel=\"nofollow\">SDS<\/a>\uff08Simple Dynamic String\uff0c\u7b80\u5355\u52a8\u6001\u5b57\u7b26\u4e32\uff09 \u6765\u4f5c\u4e3a\u5e95\u5c42\u5b9e\u73b0\u3002<\/p>\n<p>SDS \u6700\u65e9\u662f Redis \u4f5c\u8005\u4e3a\u65e5\u5e38 C \u8bed\u8a00\u5f00\u53d1\u800c\u8bbe\u8ba1\u7684 C \u5b57\u7b26\u4e32\uff0c\u540e\u6765\u88ab\u5e94\u7528\u5230\u4e86 Redis \u4e0a\uff0c\u5e76\u7ecf\u8fc7\u4e86\u5927\u91cf\u7684\u4fee\u6539\u5b8c\u5584\u4ee5\u9002\u5408\u9ad8\u6027\u80fd\u64cd\u4f5c\u3002<\/p>\n<p>Redis7.0 \u7684 SDS \u7684\u90e8\u5206\u6e90\u7801\u5982\u4e0b\uff08<a href=\"https:\/\/link.segmentfault.com\/?enc=A6yWgvJfvcSBQDPYubJJoQ%3D%3D.MAX%2Bp0%2Bk1UaCLRZ8NT91pWfRM8QDcKvi0rrlYDjnQswPicDOcBed7ITwDKVYf19bxsnE18w7jH1pxAvMLXOxgA%3D%3D\" rel=\"nofollow\">https:\/\/github.com\/redis\/redi&#8230;<\/a>\uff09\uff1a<\/p>\n<pre><code class=\"c\">\/* Note: sdshdr5 is never used, we just access the flags byte directly.\n * However is here to document the layout of type 5 SDS strings. *\/\nstruct __attribute__ ((__packed__)) sdshdr5 {\n    unsigned char flags; \/* 3 lsb of type, and 5 msb of string length *\/\n    char buf[];\n};\nstruct __attribute__ ((__packed__)) sdshdr8 {\n    uint8_t len; \/* used *\/\n    uint8_t alloc; \/* excluding the header and null terminator *\/\n    unsigned char flags; \/* 3 lsb of type, 5 unused bits *\/\n    char buf[];\n};\nstruct __attribute__ ((__packed__)) sdshdr16 {\n    uint16_t len; \/* used *\/\n    uint16_t alloc; \/* excluding the header and null terminator *\/\n    unsigned char flags; \/* 3 lsb of type, 5 unused bits *\/\n    char buf[];\n};\nstruct __attribute__ ((__packed__)) sdshdr32 {\n    uint32_t len; \/* used *\/\n    uint32_t alloc; \/* excluding the header and null terminator *\/\n    unsigned char flags; \/* 3 lsb of type, 5 unused bits *\/\n    char buf[];\n};\nstruct __attribute__ ((__packed__)) sdshdr64 {\n    uint64_t len; \/* used *\/\n    uint64_t alloc; \/* excluding the header and null terminator *\/\n    unsigned char flags; \/* 3 lsb of type, 5 unused bits *\/\n    char buf[];\n};<\/code><\/pre>\n<p>\u901a\u8fc7\u6e90\u7801\u53ef\u4ee5\u770b\u51fa\uff0cSDS \u5171\u6709\u4e94\u79cd\u5b9e\u73b0\u65b9\u5f0f SDS_TYPE_5\uff08\u5e76\u672a\u7528\u5230\uff09\u3001SDS_TYPE_8\u3001SDS_TYPE_16\u3001SDS_TYPE_32\u3001SDS_TYPE_64\uff0c\u5176\u4e2d\u53ea\u6709\u540e\u56db\u79cd\u5b9e\u9645\u7528\u5230\u3002Redis \u4f1a\u6839\u636e\u521d\u59cb\u5316\u7684\u957f\u5ea6\u51b3\u5b9a\u4f7f\u7528\u54ea\u79cd\u7c7b\u578b\uff0c\u4ece\u800c\u51cf\u5c11\u5185\u5b58\u7684\u4f7f\u7528\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7c7b\u578b<\/th>\n<th>\u5b57\u8282<\/th>\n<th>\u4f4d<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>sdshdr5<\/td>\n<td>&lt; 1<\/td>\n<td>&lt;8<\/td>\n<\/tr>\n<tr>\n<td>sdshdr8<\/td>\n<td>1<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>sdshdr16<\/td>\n<td>2<\/td>\n<td>16<\/td>\n<\/tr>\n<tr>\n<td>sdshdr32<\/td>\n<td>4<\/td>\n<td>32<\/td>\n<\/tr>\n<tr>\n<td>sdshdr64<\/td>\n<td>8<\/td>\n<td>64<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5bf9\u4e8e\u540e\u56db\u79cd\u5b9e\u73b0\u90fd\u5305\u542b\u4e86\u4e0b\u9762\u8fd9 4 \u4e2a\u5c5e\u6027\uff1a<\/p>\n<ul>\n<li><code>len<\/code> \uff1a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u4e5f\u5c31\u662f\u5df2\u7ecf\u4f7f\u7528\u7684\u5b57\u8282\u6570<\/li>\n<li><code>alloc<\/code>\uff1a\u603b\u5171\u53ef\u7528\u7684\u5b57\u7b26\u7a7a\u95f4\u5927\u5c0f\uff0calloc-len \u5c31\u662f SDS \u5269\u4f59\u7684\u7a7a\u95f4\u5927\u5c0f<\/li>\n<li><code>buf[]<\/code> \uff1a\u5b9e\u9645\u5b58\u50a8\u5b57\u7b26\u4e32\u7684\u6570\u7ec4<\/li>\n<li><code>flags<\/code> \uff1a\u4f4e\u4e09\u4f4d\u4fdd\u5b58\u7c7b\u578b\u6807\u5fd7<\/li>\n<\/ul>\n<p>SDS \u76f8\u6bd4\u4e8e C \u8bed\u8a00\u4e2d\u7684\u5b57\u7b26\u4e32\u6709\u5982\u4e0b\u63d0\u5347\uff1a<\/p>\n<ol>\n<li><strong>\u53ef\u4ee5\u907f\u514d\u7f13\u51b2\u533a\u6ea2\u51fa<\/strong> \uff1aC \u8bed\u8a00\u4e2d\u7684\u5b57\u7b26\u4e32\u88ab\u4fee\u6539\uff08\u6bd4\u5982\u62fc\u63a5\uff09\u65f6\uff0c\u4e00\u65e6\u6ca1\u6709\u5206\u914d\u8db3\u591f\u957f\u5ea6\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u5c31\u4f1a\u9020\u6210\u7f13\u51b2\u533a\u6ea2\u51fa\u3002SDS \u88ab\u4fee\u6539\u65f6\uff0c\u4f1a\u5148\u6839\u636e len \u5c5e\u6027\u68c0\u67e5\u7a7a\u95f4\u5927\u5c0f\u662f\u5426\u6ee1\u8db3\u8981\u6c42\uff0c\u5982\u679c\u4e0d\u6ee1\u8db3\uff0c\u5219\u5148\u6269\u5c55\u81f3\u6240\u9700\u5927\u5c0f\u518d\u8fdb\u884c\u4fee\u6539\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u83b7\u53d6\u5b57\u7b26\u4e32\u957f\u5ea6\u7684\u590d\u6742\u5ea6\u8f83\u4f4e<\/strong> \uff1a C \u8bed\u8a00\u4e2d\u7684\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u901a\u5e38\u662f\u7ecf\u8fc7\u904d\u5386\u8ba1\u6570\u6765\u5b9e\u73b0\u7684\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n)\u3002SDS \u7684\u957f\u5ea6\u83b7\u53d6\u76f4\u63a5\u8bfb\u53d6 len \u5c5e\u6027\u5373\u53ef\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(1)\u3002<\/li>\n<li><strong>\u51cf\u5c11\u5185\u5b58\u5206\u914d\u6b21\u6570<\/strong> \uff1a \u4e3a\u4e86\u907f\u514d\u4fee\u6539\uff08\u589e\u52a0\/\u51cf\u5c11\uff09\u5b57\u7b26\u4e32\u65f6\uff0c\u6bcf\u6b21\u90fd\u9700\u8981\u91cd\u65b0\u5206\u914d\u5185\u5b58\uff08C \u8bed\u8a00\u7684\u5b57\u7b26\u4e32\u662f\u8fd9\u6837\u7684\uff09\uff0cSDS \u5b9e\u73b0\u4e86\u7a7a\u95f4\u9884\u5206\u914d\u548c\u60f0\u6027\u7a7a\u95f4\u91ca\u653e\u4e24\u79cd\u4f18\u5316\u7b56\u7565\u3002\u5f53 SDS \u9700\u8981\u589e\u52a0\u5b57\u7b26\u4e32\u65f6\uff0cRedis \u4f1a\u4e3a SDS \u5206\u914d\u597d\u5185\u5b58\uff0c\u5e76\u4e14\u6839\u636e\u7279\u5b9a\u7684\u7b97\u6cd5\u5206\u914d\u591a\u4f59\u7684\u5185\u5b58\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u8fde\u7eed\u6267\u884c\u5b57\u7b26\u4e32\u589e\u957f\u64cd\u4f5c\u6240\u9700\u7684\u5185\u5b58\u91cd\u5206\u914d\u6b21\u6570\u3002\u5f53 SDS \u9700\u8981\u51cf\u5c11\u5b57\u7b26\u4e32\u65f6\uff0c\u8fd9\u90e8\u5206\u5185\u5b58\u4e0d\u4f1a\u7acb\u5373\u88ab\u56de\u6536\uff0c\u4f1a\u88ab\u8bb0\u5f55\u4e0b\u6765\uff0c\u7b49\u5f85\u540e\u7eed\u4f7f\u7528\uff08\u652f\u6301\u624b\u52a8\u91ca\u653e\uff0c\u6709\u5bf9\u5e94\u7684 API\uff09\u3002<\/li>\n<li><strong>\u4e8c\u8fdb\u5236\u5b89\u5168<\/strong> \uff1aC \u8bed\u8a00\u4e2d\u7684\u5b57\u7b26\u4e32\u4ee5\u7a7a\u5b57\u7b26 <code>\/0<\/code> \u4f5c\u4e3a\u5b57\u7b26\u4e32\u7ed3\u675f\u7684\u6807\u8bc6\uff0c\u8fd9\u5b58\u5728\u4e00\u4e9b\u95ee\u9898\uff0c\u50cf\u4e00\u4e9b\u4e8c\u8fdb\u5236\u6587\u4ef6\uff08\u6bd4\u5982\u56fe\u7247\u3001\u89c6\u9891\u3001\u97f3\u9891\uff09\u5c31\u53ef\u80fd\u5305\u62ec\u7a7a\u5b57\u7b26\uff0cC \u5b57\u7b26\u4e32\u65e0\u6cd5\u6b63\u786e\u4fdd\u5b58\u3002SDS \u4f7f\u7528 len \u5c5e\u6027\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u7ed3\u675f\uff0c\u4e0d\u5b58\u5728\u8fd9\u4e2a\u95ee\u9898\u3002<\/li>\n<\/ol>\n<p>\u591a\u63d0\u4e00\u5634\uff0c\u5f88\u591a\u6587\u7ae0\u91cc SDS \u7684\u5b9a\u4e49\u662f\u4e0b\u9762\u8fd9\u6837\u7684\uff1a<\/p>\n<pre><code class=\"c\">struct sdshdr {\n    unsigned int len;\n    unsigned int free;\n    char buf[];\n};<\/code><\/pre>\n<p>\u8fd9\u4e2a\u4e5f\u6ca1\u9519\uff0cRedis 3.2 \u4e4b\u524d\u5c31\u662f\u8fd9\u6837\u5b9a\u4e49\u7684\u3002\u540e\u6765\uff0c\u7531\u4e8e\u8fd9\u79cd\u65b9\u5f0f\u7684\u5b9a\u4e49\u5b58\u5728\u95ee\u9898\uff0c<code>len<\/code> \u548c <code>free<\/code> \u7684\u5b9a\u4e49\u7528\u4e86 4 \u4e2a\u5b57\u8282\uff0c\u9020\u6210\u4e86\u6d6a\u8d39\u3002Redis 3.2 \u4e4b\u540e\uff0cRedis \u6539\u8fdb\u4e86 SDS \u7684\u5b9a\u4e49\uff0c\u5c06\u5176\u5212\u5206\u4e3a\u4e86\u73b0\u5728\u7684 5 \u79cd\u7c7b\u578b\u3002<\/p>\n<h3>\u8d2d\u7269\u8f66\u4fe1\u606f\u7528 String \u8fd8\u662f Hash \u5b58\u50a8\u66f4\u597d\u5462?<\/h3>\n<p>\u7531\u4e8e\u8d2d\u7269\u8f66\u4e2d\u7684\u5546\u54c1\u9891\u7e41\u4fee\u6539\u548c\u53d8\u52a8\uff0c\u8d2d\u7269\u8f66\u4fe1\u606f\u5efa\u8bae\u4f7f\u7528 Hash \u5b58\u50a8\uff1a<\/p>\n<ul>\n<li>\u7528\u6237 id \u4e3a key<\/li>\n<li>\u5546\u54c1 id \u4e3a field\uff0c\u5546\u54c1\u6570\u91cf\u4e3a value<\/li>\n<\/ul>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302898\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u90a3\u7528\u6237\u8d2d\u7269\u8f66\u4fe1\u606f\u7684\u7ef4\u62a4\u5177\u4f53\u5e94\u8be5\u600e\u4e48\u64cd\u4f5c\u5462\uff1f<\/p>\n<ul>\n<li>\u7528\u6237\u6dfb\u52a0\u5546\u54c1\u5c31\u662f\u5f80 Hash \u91cc\u9762\u589e\u52a0\u65b0\u7684 field \u4e0e value\uff1b<\/li>\n<li>\u67e5\u8be2\u8d2d\u7269\u8f66\u4fe1\u606f\u5c31\u662f\u904d\u5386\u5bf9\u5e94\u7684 Hash\uff1b<\/li>\n<li>\u66f4\u6539\u5546\u54c1\u6570\u91cf\u76f4\u63a5\u4fee\u6539\u5bf9\u5e94\u7684 value \u503c\uff08\u76f4\u63a5 set \u6216\u8005\u505a\u8fd0\u7b97\u7686\u53ef\uff09\uff1b<\/li>\n<li>\u5220\u9664\u5546\u54c1\u5c31\u662f\u5220\u9664 Hash \u4e2d\u5bf9\u5e94\u7684 field\uff1b<\/li>\n<li>\u6e05\u7a7a\u8d2d\u7269\u8f66\u76f4\u63a5\u5220\u9664\u5bf9\u5e94\u7684 key \u5373\u53ef\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u91cc\u53ea\u662f\u4ee5\u4e1a\u52a1\u6bd4\u8f83\u7b80\u5355\u7684\u8d2d\u7269\u8f66\u573a\u666f\u4e3e\u4f8b\uff0c\u5b9e\u9645\u7535\u5546\u573a\u666f\u4e0b\uff0cfield \u53ea\u4fdd\u5b58\u4e00\u4e2a\u5546\u54c1 id \u662f\u6ca1\u529e\u6cd5\u6ee1\u8db3\u9700\u6c42\u7684\u3002<\/p>\n<h3>\u4f7f\u7528 Redis \u5b9e\u73b0\u4e00\u4e2a\u6392\u884c\u699c\u600e\u4e48\u505a\uff1f<\/h3>\n<p>Redis \u4e2d\u6709\u4e00\u4e2a\u53eb\u505a <code>sorted set<\/code> \u7684\u6570\u636e\u7ed3\u6784\u7ecf\u5e38\u88ab\u7528\u5728\u5404\u79cd\u6392\u884c\u699c\u7684\u573a\u666f\uff0c\u6bd4\u5982\u76f4\u64ad\u95f4\u9001\u793c\u7269\u7684\u6392\u884c\u699c\u3001\u670b\u53cb\u5708\u7684\u5fae\u4fe1\u6b65\u6570\u6392\u884c\u699c\u3001\u738b\u8005\u8363\u8000\u4e2d\u7684\u6bb5\u4f4d\u6392\u884c\u699c\u3001\u8bdd\u9898\u70ed\u5ea6\u6392\u884c\u699c\u7b49\u7b49\u3002<\/p>\n<p>\u76f8\u5173\u7684\u4e00\u4e9b Redis \u547d\u4ee4: <code>ZRANGE<\/code> (\u4ece\u5c0f\u5230\u5927\u6392\u5e8f) \u3001 <code>ZREVRANGE<\/code> \uff08\u4ece\u5927\u5230\u5c0f\u6392\u5e8f\uff09\u3001<code>ZREVRANK<\/code> (\u6307\u5b9a\u5143\u7d20\u6392\u540d)\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302899\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=9EsS6PcmfbyeypLlTKI6Eg%3D%3D.o4UKkhB01RoMHAC3tJN6o86b2Z6NOXpPwFwUz690Xf9ngTBhROI84baiShLDzwQTT1O9R2Yd8MRUgYMMj6SeocarUqhNDNHBxP8byBTaGuQ%3D\" rel=\"nofollow\">\u300aJava \u9762\u8bd5\u6307\u5317\u300b<\/a> \u7684\u300c\u6280\u672f\u9762\u8bd5\u9898\u7bc7\u300d\u5c31\u6709\u4e00\u7bc7\u6587\u7ae0\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528 Sorted Set \u6765\u8bbe\u8ba1\u5236\u4f5c\u4e00\u4e2a\u6392\u884c\u699c\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302900\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h3>\u4f7f\u7528 Set \u5b9e\u73b0\u62bd\u5956\u7cfb\u7edf\u9700\u8981\u7528\u5230\u4ec0\u4e48\u547d\u4ee4\uff1f<\/h3>\n<ul>\n<li><code>SPOP key count<\/code> \uff1a \u968f\u673a\u79fb\u9664\u5e76\u83b7\u53d6\u6307\u5b9a\u96c6\u5408\u4e2d\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0c\u9002\u5408\u4e0d\u5141\u8bb8\u91cd\u590d\u4e2d\u5956\u7684\u573a\u666f\u3002<\/li>\n<li><code>SRANDMEMBER key count<\/code> : \u968f\u673a\u83b7\u53d6\u6307\u5b9a\u96c6\u5408\u4e2d\u6307\u5b9a\u6570\u91cf\u7684\u5143\u7d20\uff0c\u9002\u5408\u5141\u8bb8\u91cd\u590d\u4e2d\u5956\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n<h3>\u4f7f\u7528 Bitmap \u7edf\u8ba1\u6d3b\u8dc3\u7528\u6237\u600e\u4e48\u505a\uff1f<\/h3>\n<p>\u4f7f\u7528\u65e5\u671f\uff08\u7cbe\u786e\u5230\u5929\uff09\u4f5c\u4e3a key\uff0c\u7136\u540e\u7528\u6237 ID \u4e3a offset\uff0c\u5982\u679c\u5f53\u65e5\u6d3b\u8dc3\u8fc7\u5c31\u8bbe\u7f6e\u4e3a 1\u3002<\/p>\n<p>\u521d\u59cb\u5316\u6570\u636e\uff1a<\/p>\n<pre><code class=\"bash\">&gt; SETBIT 20210308 1 1\n(integer) 0\n&gt; SETBIT 20210308 2 1\n(integer) 0\n&gt; SETBIT 20210309 1 1\n(integer) 0<\/code><\/pre>\n<p>\u7edf\u8ba1 20210308~20210309 \u603b\u6d3b\u8dc3\u7528\u6237\u6570:<\/p>\n<pre><code class=\"bash\">&gt; BITOP and desk1 20210308 20210309\n(integer) 1\n&gt; BITCOUNT desk1\n(integer) 1<\/code><\/pre>\n<p>\u7edf\u8ba1 20210308~20210309 \u5728\u7ebf\u6d3b\u8dc3\u7528\u6237\u6570:<\/p>\n<pre><code class=\"bash\">&gt; BITOP or desk2 20210308 20210309\n(integer) 1\n&gt; BITCOUNT desk2\n(integer) 2<\/code><\/pre>\n<h3>\u4f7f\u7528 HyperLogLog \u7edf\u8ba1\u9875\u9762 UV \u600e\u4e48\u505a\uff1f<\/h3>\n<p>1\u3001\u5c06\u8bbf\u95ee\u6307\u5b9a\u9875\u9762\u7684\u6bcf\u4e2a\u7528\u6237 ID \u6dfb\u52a0\u5230 <code>HyperLogLog<\/code> \u4e2d\u3002<\/p>\n<pre><code class=\"bash\">PFADD PAGE_1:UV USER1 USER2 ...... USERn<\/code><\/pre>\n<p>2\u3001\u7edf\u8ba1\u6307\u5b9a\u9875\u9762\u7684 UV\u3002<\/p>\n<pre><code class=\"bash\">PFCOUNT PAGE_1:UV<\/code><\/pre>\n<h2>Redis \u7ebf\u7a0b\u6a21\u578b<\/h2>\n<p>\u5bf9\u4e8e\u8bfb\u5199\u547d\u4ee4\u6765\u8bf4\uff0cRedis \u4e00\u76f4\u662f\u5355\u7ebf\u7a0b\u6a21\u578b\u3002\u4e0d\u8fc7\uff0c\u5728 Redis 4.0 \u7248\u672c\u4e4b\u540e\u5f15\u5165\u4e86\u591a\u7ebf\u7a0b\u6765\u6267\u884c\u4e00\u4e9b\u5927\u952e\u503c\u5bf9\u7684\u5f02\u6b65\u5220\u9664\u64cd\u4f5c\uff0c Redis 6.0 \u7248\u672c\u4e4b\u540e\u5f15\u5165\u4e86\u591a\u7ebf\u7a0b\u6765\u5904\u7406\u7f51\u7edc\u8bf7\u6c42\uff08\u63d0\u9ad8\u7f51\u7edc IO \u8bfb\u5199\u6027\u80fd\uff09\u3002<\/p>\n<h3>Redis \u5355\u7ebf\u7a0b\u6a21\u578b\u4e86\u89e3\u5417\uff1f<\/h3>\n<p><strong>Redis \u57fa\u4e8e Reactor \u6a21\u5f0f\u8bbe\u8ba1\u5f00\u53d1\u4e86\u4e00\u5957\u9ad8\u6548\u7684\u4e8b\u4ef6\u5904\u7406\u6a21\u578b<\/strong> \uff08Netty \u7684\u7ebf\u7a0b\u6a21\u578b\u4e5f\u57fa\u4e8e Reactor \u6a21\u5f0f\uff0cReactor \u6a21\u5f0f\u4e0d\u6127\u662f\u9ad8\u6027\u80fd IO \u7684\u57fa\u77f3\uff09\uff0c\u8fd9\u5957\u4e8b\u4ef6\u5904\u7406\u6a21\u578b\u5bf9\u5e94\u7684\u662f Redis \u4e2d\u7684\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\uff08file event handler\uff09\u3002\u7531\u4e8e\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\uff08file event handler\uff09\u662f\u5355\u7ebf\u7a0b\u65b9\u5f0f\u8fd0\u884c\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u4e00\u822c\u90fd\u8bf4 Redis \u662f\u5355\u7ebf\u7a0b\u6a21\u578b\u3002<\/p>\n<p>\u300aRedis \u8bbe\u8ba1\u4e0e\u5b9e\u73b0\u300b\u6709\u4e00\u6bb5\u8bdd\u662f\u5982\u662f\u4ecb\u7ecd\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u7684\uff0c\u6211\u89c9\u5f97\u5199\u5f97\u633a\u4e0d\u9519\u3002<\/p>\n<blockquote>\n<p>Redis \u57fa\u4e8e Reactor \u6a21\u5f0f\u5f00\u53d1\u4e86\u81ea\u5df1\u7684\u7f51\u7edc\u4e8b\u4ef6\u5904\u7406\u5668\uff1a\u8fd9\u4e2a\u5904\u7406\u5668\u88ab\u79f0\u4e3a\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\uff08file event handler\uff09\u3002<\/p>\n<ul>\n<li>\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u4f7f\u7528 I\/O \u591a\u8def\u590d\u7528\uff08multiplexing\uff09\u7a0b\u5e8f\u6765\u540c\u65f6\u76d1\u542c\u591a\u4e2a\u5957\u63a5\u5b57\uff0c\u5e76\u6839\u636e\u5957\u63a5\u5b57\u76ee\u524d\u6267\u884c\u7684\u4efb\u52a1\u6765\u4e3a\u5957\u63a5\u5b57\u5173\u8054\u4e0d\u540c\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u3002<\/li>\n<li>\u5f53\u88ab\u76d1\u542c\u7684\u5957\u63a5\u5b57\u51c6\u5907\u597d\u6267\u884c\u8fde\u63a5\u5e94\u7b54\uff08accept\uff09\u3001\u8bfb\u53d6\uff08read\uff09\u3001\u5199\u5165\uff08write\uff09\u3001\u5173 \u95ed\uff08close\uff09\u7b49\u64cd\u4f5c\u65f6\uff0c\u4e0e\u64cd\u4f5c\u76f8\u5bf9\u5e94\u7684\u6587\u4ef6\u4e8b\u4ef6\u5c31\u4f1a\u4ea7\u751f\uff0c\u8fd9\u65f6\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u5c31\u4f1a\u8c03\u7528\u5957\u63a5\u5b57\u4e4b\u524d\u5173\u8054\u597d\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u6765\u5904\u7406\u8fd9\u4e9b\u4e8b\u4ef6\u3002<\/li>\n<\/ul>\n<p><strong>\u867d\u7136\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u4ee5\u5355\u7ebf\u7a0b\u65b9\u5f0f\u8fd0\u884c\uff0c\u4f46\u901a\u8fc7\u4f7f\u7528 I\/O \u591a\u8def\u590d\u7528\u7a0b\u5e8f\u6765\u76d1\u542c\u591a\u4e2a\u5957\u63a5\u5b57<\/strong>\uff0c\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u65e2\u5b9e\u73b0\u4e86\u9ad8\u6027\u80fd\u7684\u7f51\u7edc\u901a\u4fe1\u6a21\u578b\uff0c\u53c8\u53ef\u4ee5\u5f88\u597d\u5730\u4e0e Redis \u670d\u52a1\u5668\u4e2d\u5176\u4ed6\u540c\u6837\u4ee5\u5355\u7ebf\u7a0b\u65b9\u5f0f\u8fd0\u884c\u7684\u6a21\u5757\u8fdb\u884c\u5bf9\u63a5\uff0c\u8fd9\u4fdd\u6301\u4e86 Redis \u5185\u90e8\u5355\u7ebf\u7a0b\u8bbe\u8ba1\u7684\u7b80\u5355\u6027\u3002<\/p>\n<\/blockquote>\n<p><strong>\u65e2\u7136\u662f\u5355\u7ebf\u7a0b\uff0c\u90a3\u600e\u4e48\u76d1\u542c\u5927\u91cf\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u5462\uff1f<\/strong><\/p>\n<p>Redis \u901a\u8fc7 <strong>IO \u591a\u8def\u590d\u7528\u7a0b\u5e8f<\/strong> \u6765\u76d1\u542c\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u5927\u91cf\u8fde\u63a5\uff08\u6216\u8005\u8bf4\u662f\u76d1\u542c\u591a\u4e2a socket\uff09\uff0c\u5b83\u4f1a\u5c06\u611f\u5174\u8da3\u7684\u4e8b\u4ef6\u53ca\u7c7b\u578b\uff08\u8bfb\u3001\u5199\uff09\u6ce8\u518c\u5230\u5185\u6838\u4e2d\u5e76\u76d1\u542c\u6bcf\u4e2a\u4e8b\u4ef6\u662f\u5426\u53d1\u751f\u3002<\/p>\n<p>\u8fd9\u6837\u7684\u597d\u5904\u975e\u5e38\u660e\u663e\uff1a <strong>I\/O \u591a\u8def\u590d\u7528\u6280\u672f\u7684\u4f7f\u7528\u8ba9 Redis \u4e0d\u9700\u8981\u989d\u5916\u521b\u5efa\u591a\u4f59\u7684\u7ebf\u7a0b\u6765\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u5927\u91cf\u8fde\u63a5\uff0c\u964d\u4f4e\u4e86\u8d44\u6e90\u7684\u6d88\u8017<\/strong>\uff08\u548c NIO \u4e2d\u7684 <code>Selector<\/code> \u7ec4\u4ef6\u5f88\u50cf\uff09\u3002<\/p>\n<p>\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\uff08file event handler\uff09\u4e3b\u8981\u662f\u5305\u542b 4 \u4e2a\u90e8\u5206\uff1a<\/p>\n<ul>\n<li>\u591a\u4e2a socket\uff08\u5ba2\u6237\u7aef\u8fde\u63a5\uff09<\/li>\n<li>IO \u591a\u8def\u590d\u7528\u7a0b\u5e8f\uff08\u652f\u6301\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u5173\u952e\uff09<\/li>\n<li>\u6587\u4ef6\u4e8b\u4ef6\u5206\u6d3e\u5668\uff08\u5c06 socket \u5173\u8054\u5230\u76f8\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u5668\uff09<\/li>\n<li>\u4e8b\u4ef6\u5904\u7406\u5668\uff08\u8fde\u63a5\u5e94\u7b54\u5904\u7406\u5668\u3001\u547d\u4ee4\u8bf7\u6c42\u5904\u7406\u5668\u3001\u547d\u4ee4\u56de\u590d\u5904\u7406\u5668\uff09<\/li>\n<\/ul>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302901\" alt=\"\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\" title=\"\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\" loading=\"lazy\"><\/p>\n<p>\u76f8\u5173\u9605\u8bfb\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=Rr%2Bds2MbHvGT2%2BEPUF%2FLpw%3D%3D.yleahV9YLvgOPx6zvwsmf%2B%2Fbc73755R3FLAFeIkeZwnunOeeIm95Jld1%2Bdb2nl1P\" rel=\"nofollow\">Redis \u4e8b\u4ef6\u673a\u5236\u8be6\u89e3<\/a> \u3002<\/p>\n<h3>Redis6.0 \u4e4b\u524d\u4e3a\u4ec0\u4e48\u4e0d\u4f7f\u7528\u591a\u7ebf\u7a0b\uff1f<\/h3>\n<p>\u867d\u7136\u8bf4 Redis \u662f\u5355\u7ebf\u7a0b\u6a21\u578b\uff0c\u4f46\u662f\uff0c\u5b9e\u9645\u4e0a\uff0c<strong>Redis \u5728 4.0 \u4e4b\u540e\u7684\u7248\u672c\u4e2d\u5c31\u5df2\u7ecf\u52a0\u5165\u4e86\u5bf9\u591a\u7ebf\u7a0b\u7684\u652f\u6301\u3002<\/strong><\/p>\n<p>\u4e0d\u8fc7\uff0cRedis 4.0 \u589e\u52a0\u7684\u591a\u7ebf\u7a0b\u4e3b\u8981\u662f\u9488\u5bf9\u4e00\u4e9b\u5927\u952e\u503c\u5bf9\u7684\u5220\u9664\u64cd\u4f5c\u7684\u547d\u4ee4\uff0c\u4f7f\u7528\u8fd9\u4e9b\u547d\u4ee4\u5c31\u4f1a\u4f7f\u7528\u4e3b\u7ebf\u7a0b\u4e4b\u5916\u7684\u5176\u4ed6\u7ebf\u7a0b\u6765\u201c\u5f02\u6b65\u5904\u7406\u201d\u3002<\/p>\n<p>\u4e3a\u6b64\uff0cRedis 4.0 \u4e4b\u540e\u65b0\u589e\u4e86<code>UNLINK<\/code>\uff08\u53ef\u4ee5\u770b\u4f5c\u662f <code>DEL<\/code> \u7684\u5f02\u6b65\u7248\u672c\uff09\u3001<code>FLUSHALL ASYNC<\/code>\uff08\u6e05\u7a7a\u6240\u6709\u6570\u636e\u5e93\u7684\u6240\u6709 key\uff0c\u4e0d\u4ec5\u4ec5\u662f\u5f53\u524d <code>SELECT<\/code> \u7684\u6570\u636e\u5e93\uff09\u3001<code>FLUSHDB ASYNC<\/code>\uff08\u6e05\u7a7a\u5f53\u524d <code>SELECT<\/code> \u6570\u636e\u5e93\u4e2d\u7684\u6240\u6709 key\uff09\u7b49\u5f02\u6b65\u547d\u4ee4\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302902\" alt=\"redis4.0 more thread\" title=\"redis4.0 more thread\" loading=\"lazy\"><\/p>\n<p>\u5927\u4f53\u4e0a\u6765\u8bf4\uff0cRedis 6.0 \u4e4b\u524d\u4e3b\u8981\u8fd8\u662f\u5355\u7ebf\u7a0b\u5904\u7406\u3002<\/p>\n<p><strong>\u90a3 Redis6.0 \u4e4b\u524d\u4e3a\u4ec0\u4e48\u4e0d\u4f7f\u7528\u591a\u7ebf\u7a0b\uff1f<\/strong> \u6211\u89c9\u5f97\u4e3b\u8981\u539f\u56e0\u6709 3 \u70b9\uff1a<\/p>\n<ul>\n<li>\u5355\u7ebf\u7a0b\u7f16\u7a0b\u5bb9\u6613\u5e76\u4e14\u66f4\u5bb9\u6613\u7ef4\u62a4\uff1b<\/li>\n<li>Redis \u7684\u6027\u80fd\u74f6\u9888\u4e0d\u5728 CPU \uff0c\u4e3b\u8981\u5728\u5185\u5b58\u548c\u7f51\u7edc\uff1b<\/li>\n<li>\u591a\u7ebf\u7a0b\u5c31\u4f1a\u5b58\u5728\u6b7b\u9501\u3001\u7ebf\u7a0b\u4e0a\u4e0b\u6587\u5207\u6362\u7b49\u95ee\u9898\uff0c\u751a\u81f3\u4f1a\u5f71\u54cd\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>\u76f8\u5173\u9605\u8bfb\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=M%2BkC8eAGbMMq%2Bi%2BFl%2FmEUg%3D%3D.qZ1B8R0Hf9ngbX3ZwpFSkg9JokrGto8os3I6SnMqnLN5vTjgjUtCTX3RT7Ggp98CqJ3%2BocUI8z8SaRAgwJ7oCA%3D%3D\" rel=\"nofollow\">\u4e3a\u4ec0\u4e48 Redis \u9009\u62e9\u5355\u7ebf\u7a0b\u6a21\u578b<\/a> \u3002<\/p>\n<h3>Redis6.0 \u4e4b\u540e\u4e3a\u4f55\u5f15\u5165\u4e86\u591a\u7ebf\u7a0b\uff1f<\/h3>\n<p><strong>Redis6.0 \u5f15\u5165\u591a\u7ebf\u7a0b\u4e3b\u8981\u662f\u4e3a\u4e86\u63d0\u9ad8\u7f51\u7edc IO \u8bfb\u5199\u6027\u80fd<\/strong>\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u7b97\u662f Redis \u4e2d\u7684\u4e00\u4e2a\u6027\u80fd\u74f6\u9888\uff08Redis \u7684\u74f6\u9888\u4e3b\u8981\u53d7\u9650\u4e8e\u5185\u5b58\u548c\u7f51\u7edc\uff09\u3002<\/p>\n<p>\u867d\u7136\uff0cRedis6.0 \u5f15\u5165\u4e86\u591a\u7ebf\u7a0b\uff0c\u4f46\u662f Redis \u7684\u591a\u7ebf\u7a0b\u53ea\u662f\u5728\u7f51\u7edc\u6570\u636e\u7684\u8bfb\u5199\u8fd9\u7c7b\u8017\u65f6\u64cd\u4f5c\u4e0a\u4f7f\u7528\u4e86\uff0c\u6267\u884c\u547d\u4ee4\u4ecd\u7136\u662f\u5355\u7ebf\u7a0b\u987a\u5e8f\u6267\u884c\u3002\u56e0\u6b64\uff0c\u4f60\u4e5f\u4e0d\u9700\u8981\u62c5\u5fc3\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u3002<\/p>\n<p>Redis6.0 \u7684\u591a\u7ebf\u7a0b\u9ed8\u8ba4\u662f\u7981\u7528\u7684\uff0c\u53ea\u4f7f\u7528\u4e3b\u7ebf\u7a0b\u3002\u5982\u9700\u5f00\u542f\u9700\u8981\u8bbe\u7f6eIO\u7ebf\u7a0b\u6570 &gt; 1\uff0c\u9700\u8981\u4fee\u6539 redis \u914d\u7f6e\u6587\u4ef6 <code>redis.conf<\/code> \uff1a<\/p>\n<pre><code class=\"bash\">io-threads 4 #\u8bbe\u7f6e1\u7684\u8bdd\u53ea\u4f1a\u5f00\u542f\u4e3b\u7ebf\u7a0b\uff0c\u5b98\u7f51\u5efa\u8bae4\u6838\u7684\u673a\u5668\u5efa\u8bae\u8bbe\u7f6e\u4e3a2\u62163\u4e2a\u7ebf\u7a0b\uff0c8\u6838\u7684\u5efa\u8bae\u8bbe\u7f6e\u4e3a6\u4e2a\u7ebf\u7a0b<\/code><\/pre>\n<p>\u53e6\u5916\uff1a<\/p>\n<ul>\n<li>io-threads\u7684\u4e2a\u6570\u4e00\u65e6\u8bbe\u7f6e\uff0c\u4e0d\u80fd\u901a\u8fc7config\u52a8\u6001\u8bbe\u7f6e<\/li>\n<li>\u5f53\u8bbe\u7f6essl\u540e\uff0cio-threads\u5c06\u4e0d\u5de5\u4f5c<\/li>\n<\/ul>\n<p>\u5f00\u542f\u591a\u7ebf\u7a0b\u540e\uff0c\u9ed8\u8ba4\u53ea\u4f1a\u4f7f\u7528\u591a\u7ebf\u7a0b\u8fdb\u884cIO\u5199\u5165writes\uff0c\u5373\u53d1\u9001\u6570\u636e\u7ed9\u5ba2\u6237\u7aef\uff0c\u5982\u679c\u9700\u8981\u5f00\u542f\u591a\u7ebf\u7a0bIO\u8bfb\u53d6reads\uff0c\u540c\u6837\u9700\u8981\u4fee\u6539 redis \u914d\u7f6e\u6587\u4ef6 <code>redis.conf<\/code> :<\/p>\n<pre><code class=\"bash\">io-threads-do-reads yes<\/code><\/pre>\n<p>\u4f46\u662f\u5b98\u7f51\u63cf\u8ff0\u5f00\u542f\u591a\u7ebf\u7a0b\u8bfb\u5e76\u4e0d\u80fd\u6709\u592a\u5927\u63d0\u5347\uff0c\u56e0\u6b64\u4e00\u822c\u60c5\u51b5\u4e0b\u5e76\u4e0d\u5efa\u8bae\u5f00\u542f<\/p>\n<p>\u76f8\u5173\u9605\u8bfb\uff1a<\/p>\n<ul>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=SoimjU0MxPF5lTIPjyNMqg%3D%3D.n%2BMC%2FSOePXXi2KRlKvlOIY0z%2FIK60qfCWQfW%2BkdE29Zxg6kvBvHnt4LFtAZgHPZSbxwOlnQbJp%2Bw%2FJeZDVv3iA%3D%3D\" rel=\"nofollow\">Redis 6.0 \u65b0\u7279\u6027-\u591a\u7ebf\u7a0b\u8fde\u73af 13 \u95ee\uff01<\/a><\/li>\n<li><a href=\"https:\/\/segmentfault.com\/a\/1190000039223696\">Redis \u591a\u7ebf\u7a0b\u7f51\u7edc\u6a21\u578b\u5168\u9762\u63ed\u79d8<\/a>\uff08\u63a8\u8350\uff09<\/li>\n<\/ul>\n<h2>Redis \u5185\u5b58\u7ba1\u7406<\/h2>\n<h3>Redis \u7ed9\u7f13\u5b58\u6570\u636e\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u6709\u5565\u7528\uff1f<\/h3>\n<p>\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u8bbe\u7f6e\u4fdd\u5b58\u7684\u7f13\u5b58\u6570\u636e\u7684\u65f6\u5019\u90fd\u4f1a\u8bbe\u7f6e\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4\u3002\u4e3a\u4ec0\u4e48\u5462\uff1f<\/p>\n<p>\u56e0\u4e3a\u5185\u5b58\u662f\u6709\u9650\u7684\uff0c\u5982\u679c\u7f13\u5b58\u4e2d\u7684\u6240\u6709\u6570\u636e\u90fd\u662f\u4e00\u76f4\u4fdd\u5b58\u7684\u8bdd\uff0c\u5206\u5206\u949f\u76f4\u63a5 Out of memory\u3002<\/p>\n<p>Redis \u81ea\u5e26\u4e86\u7ed9\u7f13\u5b58\u6570\u636e\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u529f\u80fd\uff0c\u6bd4\u5982\uff1a<\/p>\n<pre><code class=\"bash\">127.0.0.1:6379&gt; expire key 60 # \u6570\u636e\u5728 60s \u540e\u8fc7\u671f\n(integer) 1\n127.0.0.1:6379&gt; setex key 60 value # \u6570\u636e\u5728 60s \u540e\u8fc7\u671f (setex:[set] + [ex]pire)\nOK\n127.0.0.1:6379&gt; ttl key # \u67e5\u770b\u6570\u636e\u8fd8\u6709\u591a\u4e45\u8fc7\u671f\n(integer) 56<\/code><\/pre>\n<p>\u6ce8\u610f\uff1a<strong>Redis \u4e2d\u9664\u4e86\u5b57\u7b26\u4e32\u7c7b\u578b\u6709\u81ea\u5df1\u72ec\u6709\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u547d\u4ee4 <code>setex<\/code> \u5916\uff0c\u5176\u4ed6\u65b9\u6cd5\u90fd\u9700\u8981\u4f9d\u9760 <code>expire<\/code> \u547d\u4ee4\u6765\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4 \u3002\u53e6\u5916\uff0c <code>persist<\/code> \u547d\u4ee4\u53ef\u4ee5\u79fb\u9664\u4e00\u4e2a\u952e\u7684\u8fc7\u671f\u65f6\u95f4\u3002<\/strong><\/p>\n<p><strong>\u8fc7\u671f\u65f6\u95f4\u9664\u4e86\u6709\u52a9\u4e8e\u7f13\u89e3\u5185\u5b58\u7684\u6d88\u8017\uff0c\u8fd8\u6709\u4ec0\u4e48\u5176\u4ed6\u7528\u4e48\uff1f<\/strong><\/p>\n<p>\u5f88\u591a\u65f6\u5019\uff0c\u6211\u4eec\u7684\u4e1a\u52a1\u573a\u666f\u5c31\u662f\u9700\u8981\u67d0\u4e2a\u6570\u636e\u53ea\u5728\u67d0\u4e00\u65f6\u95f4\u6bb5\u5185\u5b58\u5728\uff0c\u6bd4\u5982\u6211\u4eec\u7684\u77ed\u4fe1\u9a8c\u8bc1\u7801\u53ef\u80fd\u53ea\u5728 1 \u5206\u949f\u5185\u6709\u6548\uff0c\u7528\u6237\u767b\u5f55\u7684 token \u53ef\u80fd\u53ea\u5728 1 \u5929\u5185\u6709\u6548\u3002<\/p>\n<p>\u5982\u679c\u4f7f\u7528\u4f20\u7edf\u7684\u6570\u636e\u5e93\u6765\u5904\u7406\u7684\u8bdd\uff0c\u4e00\u822c\u90fd\u662f\u81ea\u5df1\u5224\u65ad\u8fc7\u671f\uff0c\u8fd9\u6837\u66f4\u9ebb\u70e6\u5e76\u4e14\u6027\u80fd\u8981\u5dee\u5f88\u591a\u3002<\/p>\n<h3>Redis \u662f\u5982\u4f55\u5224\u65ad\u6570\u636e\u662f\u5426\u8fc7\u671f\u7684\u5462\uff1f<\/h3>\n<p>Redis \u901a\u8fc7\u4e00\u4e2a\u53eb\u505a\u8fc7\u671f\u5b57\u5178\uff08\u53ef\u4ee5\u770b\u4f5c\u662f hash \u8868\uff09\u6765\u4fdd\u5b58\u6570\u636e\u8fc7\u671f\u7684\u65f6\u95f4\u3002\u8fc7\u671f\u5b57\u5178\u7684\u952e\u6307\u5411 Redis \u6570\u636e\u5e93\u4e2d\u7684\u67d0\u4e2a key(\u952e)\uff0c\u8fc7\u671f\u5b57\u5178\u7684\u503c\u662f\u4e00\u4e2a long long \u7c7b\u578b\u7684\u6574\u6570\uff0c\u8fd9\u4e2a\u6574\u6570\u4fdd\u5b58\u4e86 key \u6240\u6307\u5411\u7684\u6570\u636e\u5e93\u952e\u7684\u8fc7\u671f\u65f6\u95f4\uff08\u6beb\u79d2\u7cbe\u5ea6\u7684 UNIX \u65f6\u95f4\u6233\uff09\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302903\" alt=\"redis\u8fc7\u671f\u5b57\u5178\" title=\"redis\u8fc7\u671f\u5b57\u5178\" loading=\"lazy\"><\/p>\n<p>\u8fc7\u671f\u5b57\u5178\u662f\u5b58\u50a8\u5728 redisDb \u8fd9\u4e2a\u7ed3\u6784\u91cc\u7684\uff1a<\/p>\n<pre><code class=\"c\">typedef struct redisDb {\n    ...\n\n    dict *dict;     \/\/\u6570\u636e\u5e93\u952e\u7a7a\u95f4,\u4fdd\u5b58\u7740\u6570\u636e\u5e93\u4e2d\u6240\u6709\u952e\u503c\u5bf9\n    dict *expires   \/\/ \u8fc7\u671f\u5b57\u5178,\u4fdd\u5b58\u7740\u952e\u7684\u8fc7\u671f\u65f6\u95f4\n    ...\n} redisDb;<\/code><\/pre>\n<h3>\u8fc7\u671f\u7684\u6570\u636e\u7684\u5220\u9664\u7b56\u7565\u4e86\u89e3\u4e48\uff1f<\/h3>\n<p>\u5982\u679c\u5047\u8bbe\u4f60\u8bbe\u7f6e\u4e86\u4e00\u6279 key \u53ea\u80fd\u5b58\u6d3b 1 \u5206\u949f\uff0c\u90a3\u4e48 1 \u5206\u949f\u540e\uff0cRedis \u662f\u600e\u4e48\u5bf9\u8fd9\u6279 key \u8fdb\u884c\u5220\u9664\u7684\u5462\uff1f<\/p>\n<p>\u5e38\u7528\u7684\u8fc7\u671f\u6570\u636e\u7684\u5220\u9664\u7b56\u7565\u5c31\u4e24\u4e2a\uff08\u91cd\u8981\uff01\u81ea\u5df1\u9020\u7f13\u5b58\u8f6e\u5b50\u7684\u65f6\u5019\u9700\u8981\u683c\u5916\u8003\u8651\u7684\u4e1c\u897f\uff09\uff1a<\/p>\n<ol>\n<li><strong>\u60f0\u6027\u5220\u9664<\/strong> \uff1a\u53ea\u4f1a\u5728\u53d6\u51fa key \u7684\u65f6\u5019\u624d\u5bf9\u6570\u636e\u8fdb\u884c\u8fc7\u671f\u68c0\u67e5\u3002\u8fd9\u6837\u5bf9 CPU \u6700\u53cb\u597d\uff0c\u4f46\u662f\u53ef\u80fd\u4f1a\u9020\u6210\u592a\u591a\u8fc7\u671f key \u6ca1\u6709\u88ab\u5220\u9664\u3002<\/li>\n<li><strong>\u5b9a\u671f\u5220\u9664<\/strong> \uff1a \u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u62bd\u53d6\u4e00\u6279 key \u6267\u884c\u5220\u9664\u8fc7\u671f key \u64cd\u4f5c\u3002\u5e76\u4e14\uff0cRedis \u5e95\u5c42\u4f1a\u901a\u8fc7\u9650\u5236\u5220\u9664\u64cd\u4f5c\u6267\u884c\u7684\u65f6\u957f\u548c\u9891\u7387\u6765\u51cf\u5c11\u5220\u9664\u64cd\u4f5c\u5bf9 CPU \u65f6\u95f4\u7684\u5f71\u54cd\u3002<\/li>\n<\/ol>\n<p>\u5b9a\u671f\u5220\u9664\u5bf9\u5185\u5b58\u66f4\u52a0\u53cb\u597d\uff0c\u60f0\u6027\u5220\u9664\u5bf9 CPU \u66f4\u52a0\u53cb\u597d\u3002\u4e24\u8005\u5404\u6709\u5343\u79cb\uff0c\u6240\u4ee5 Redis \u91c7\u7528\u7684\u662f <strong>\u5b9a\u671f\u5220\u9664+\u60f0\u6027\/\u61d2\u6c49\u5f0f\u5220\u9664<\/strong> \u3002<\/p>\n<p>\u4f46\u662f\uff0c\u4ec5\u4ec5\u901a\u8fc7\u7ed9 key \u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u8fd8\u662f\u6709\u95ee\u9898\u7684\u3002\u56e0\u4e3a\u8fd8\u662f\u53ef\u80fd\u5b58\u5728\u5b9a\u671f\u5220\u9664\u548c\u60f0\u6027\u5220\u9664\u6f0f\u6389\u4e86\u5f88\u591a\u8fc7\u671f key \u7684\u60c5\u51b5\u3002\u8fd9\u6837\u5c31\u5bfc\u81f4\u5927\u91cf\u8fc7\u671f key \u5806\u79ef\u5728\u5185\u5b58\u91cc\uff0c\u7136\u540e\u5c31 Out of memory \u4e86\u3002<\/p>\n<p>\u600e\u4e48\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f\u7b54\u6848\u5c31\u662f\uff1a<strong>Redis \u5185\u5b58\u6dd8\u6c70\u673a\u5236\u3002<\/strong><\/p>\n<h3>Redis \u5185\u5b58\u6dd8\u6c70\u673a\u5236\u4e86\u89e3\u4e48\uff1f<\/h3>\n<blockquote><p>\u76f8\u5173\u95ee\u9898\uff1aMySQL \u91cc\u6709 2000w \u6570\u636e\uff0cRedis \u4e2d\u53ea\u5b58 20w \u7684\u6570\u636e\uff0c\u5982\u4f55\u4fdd\u8bc1 Redis \u4e2d\u7684\u6570\u636e\u90fd\u662f\u70ed\u70b9\u6570\u636e?<\/p><\/blockquote>\n<p>Redis \u63d0\u4f9b 6 \u79cd\u6570\u636e\u6dd8\u6c70\u7b56\u7565\uff1a<\/p>\n<ol>\n<li><strong>volatile-lru\uff08least recently used\uff09<\/strong>\uff1a\u4ece\u5df2\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\u96c6\uff08server.db[i].expires\uff09\u4e2d\u6311\u9009\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684\u6570\u636e\u6dd8\u6c70<\/li>\n<li><strong>volatile-ttl<\/strong>\uff1a\u4ece\u5df2\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\u96c6\uff08server.db[i].expires\uff09\u4e2d\u6311\u9009\u5c06\u8981\u8fc7\u671f\u7684\u6570\u636e\u6dd8\u6c70<\/li>\n<li><strong>volatile-random<\/strong>\uff1a\u4ece\u5df2\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\u96c6\uff08server.db[i].expires\uff09\u4e2d\u4efb\u610f\u9009\u62e9\u6570\u636e\u6dd8\u6c70<\/li>\n<li><strong>allkeys-lru\uff08least recently used\uff09<\/strong>\uff1a\u5f53\u5185\u5b58\u4e0d\u8db3\u4ee5\u5bb9\u7eb3\u65b0\u5199\u5165\u6570\u636e\u65f6\uff0c\u5728\u952e\u7a7a\u95f4\u4e2d\uff0c\u79fb\u9664\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684 key\uff08\u8fd9\u4e2a\u662f\u6700\u5e38\u7528\u7684\uff09<\/li>\n<li><strong>allkeys-random<\/strong>\uff1a\u4ece\u6570\u636e\u96c6\uff08server.db[i].dict\uff09\u4e2d\u4efb\u610f\u9009\u62e9\u6570\u636e\u6dd8\u6c70<\/li>\n<li><strong>no-eviction<\/strong>\uff1a\u7981\u6b62\u9a71\u9010\u6570\u636e\uff0c\u4e5f\u5c31\u662f\u8bf4\u5f53\u5185\u5b58\u4e0d\u8db3\u4ee5\u5bb9\u7eb3\u65b0\u5199\u5165\u6570\u636e\u65f6\uff0c\u65b0\u5199\u5165\u64cd\u4f5c\u4f1a\u62a5\u9519\u3002\u8fd9\u4e2a\u5e94\u8be5\u6ca1\u4eba\u4f7f\u7528\u5427\uff01<\/li>\n<\/ol>\n<p>4.0 \u7248\u672c\u540e\u589e\u52a0\u4ee5\u4e0b\u4e24\u79cd\uff1a<\/p>\n<ol start=\"7\">\n<li><strong>volatile-lfu\uff08least frequently used\uff09<\/strong>\uff1a\u4ece\u5df2\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684\u6570\u636e\u96c6\uff08server.db[i].expires\uff09\u4e2d\u6311\u9009\u6700\u4e0d\u7ecf\u5e38\u4f7f\u7528\u7684\u6570\u636e\u6dd8\u6c70<\/li>\n<li><strong>allkeys-lfu\uff08least frequently used\uff09<\/strong>\uff1a\u5f53\u5185\u5b58\u4e0d\u8db3\u4ee5\u5bb9\u7eb3\u65b0\u5199\u5165\u6570\u636e\u65f6\uff0c\u5728\u952e\u7a7a\u95f4\u4e2d\uff0c\u79fb\u9664\u6700\u4e0d\u7ecf\u5e38\u4f7f\u7528\u7684 key<\/li>\n<\/ol>\n<h2>Redis \u6301\u4e45\u5316\u673a\u5236<\/h2>\n<h3>\u600e\u4e48\u4fdd\u8bc1 Redis \u6302\u6389\u4e4b\u540e\u518d\u91cd\u542f\u6570\u636e\u53ef\u4ee5\u8fdb\u884c\u6062\u590d\uff1f<\/h3>\n<p>\u5f88\u591a\u65f6\u5019\u6211\u4eec\u9700\u8981\u6301\u4e45\u5316\u6570\u636e\u4e5f\u5c31\u662f\u5c06\u5185\u5b58\u4e2d\u7684\u6570\u636e\u5199\u5165\u5230\u786c\u76d8\u91cc\u9762\uff0c\u5927\u90e8\u5206\u539f\u56e0\u662f\u4e3a\u4e86\u4e4b\u540e\u91cd\u7528\u6570\u636e\uff08\u6bd4\u5982\u91cd\u542f\u673a\u5668\u3001\u673a\u5668\u6545\u969c\u4e4b\u540e\u6062\u590d\u6570\u636e\uff09\uff0c\u6216\u8005\u662f\u4e3a\u4e86\u9632\u6b62\u7cfb\u7edf\u6545\u969c\u800c\u5c06\u6570\u636e\u5907\u4efd\u5230\u4e00\u4e2a\u8fdc\u7a0b\u4f4d\u7f6e\u3002<\/p>\n<p>Redis \u4e0d\u540c\u4e8e Memcached \u7684\u5f88\u91cd\u8981\u4e00\u70b9\u5c31\u662f\uff0cRedis \u652f\u6301\u6301\u4e45\u5316\uff0c\u800c\u4e14\u652f\u6301\u4e24\u79cd\u4e0d\u540c\u7684\u6301\u4e45\u5316\u64cd\u4f5c\u3002<strong>Redis \u7684\u4e00\u79cd\u6301\u4e45\u5316\u65b9\u5f0f\u53eb\u5feb\u7167\uff08snapshotting\uff0cRDB\uff09\uff0c\u53e6\u4e00\u79cd\u65b9\u5f0f\u662f\u53ea\u8ffd\u52a0\u6587\u4ef6\uff08append-only file, AOF\uff09<\/strong>\u3002\u8fd9\u4e24\u79cd\u65b9\u6cd5\u5404\u6709\u5343\u79cb\uff0c\u4e0b\u9762\u6211\u4f1a\u8be6\u7ec6\u8fd9\u4e24\u79cd\u6301\u4e45\u5316\u65b9\u6cd5\u662f\u4ec0\u4e48\uff0c\u600e\u4e48\u7528\uff0c\u5982\u4f55\u9009\u62e9\u9002\u5408\u81ea\u5df1\u7684\u6301\u4e45\u5316\u65b9\u6cd5\u3002<\/p>\n<h3>\u4ec0\u4e48\u662f RDB \u6301\u4e45\u5316\uff1f<\/h3>\n<p>Redis \u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u5feb\u7167\u6765\u83b7\u5f97\u5b58\u50a8\u5728\u5185\u5b58\u91cc\u9762\u7684\u6570\u636e\u5728\u67d0\u4e2a\u65f6\u95f4\u70b9\u4e0a\u7684\u526f\u672c\u3002Redis \u521b\u5efa\u5feb\u7167\u4e4b\u540e\uff0c\u53ef\u4ee5\u5bf9\u5feb\u7167\u8fdb\u884c\u5907\u4efd\uff0c\u53ef\u4ee5\u5c06\u5feb\u7167\u590d\u5236\u5230\u5176\u4ed6\u670d\u52a1\u5668\u4ece\u800c\u521b\u5efa\u5177\u6709\u76f8\u540c\u6570\u636e\u7684\u670d\u52a1\u5668\u526f\u672c\uff08Redis \u4e3b\u4ece\u7ed3\u6784\uff0c\u4e3b\u8981\u7528\u6765\u63d0\u9ad8 Redis \u6027\u80fd\uff09\uff0c\u8fd8\u53ef\u4ee5\u5c06\u5feb\u7167\u7559\u5728\u539f\u5730\u4ee5\u4fbf\u91cd\u542f\u670d\u52a1\u5668\u7684\u65f6\u5019\u4f7f\u7528\u3002<\/p>\n<p>\u5feb\u7167\u6301\u4e45\u5316\u662f Redis \u9ed8\u8ba4\u91c7\u7528\u7684\u6301\u4e45\u5316\u65b9\u5f0f\uff0c\u5728 <code>redis.conf<\/code> \u914d\u7f6e\u6587\u4ef6\u4e2d\u9ed8\u8ba4\u6709\u6b64\u4e0b\u914d\u7f6e\uff1a<\/p>\n<pre><code class=\"clojure\">save 900 1           #\u5728900\u79d2(15\u5206\u949f)\u4e4b\u540e\uff0c\u5982\u679c\u81f3\u5c11\u67091\u4e2akey\u53d1\u751f\u53d8\u5316\uff0cRedis\u5c31\u4f1a\u81ea\u52a8\u89e6\u53d1bgsave\u547d\u4ee4\u521b\u5efa\u5feb\u7167\u3002\n\nsave 300 10          #\u5728300\u79d2(5\u5206\u949f)\u4e4b\u540e\uff0c\u5982\u679c\u81f3\u5c11\u670910\u4e2akey\u53d1\u751f\u53d8\u5316\uff0cRedis\u5c31\u4f1a\u81ea\u52a8\u89e6\u53d1bgsave\u547d\u4ee4\u521b\u5efa\u5feb\u7167\u3002\n\nsave 60 10000        #\u572860\u79d2(1\u5206\u949f)\u4e4b\u540e\uff0c\u5982\u679c\u81f3\u5c11\u670910000\u4e2akey\u53d1\u751f\u53d8\u5316\uff0cRedis\u5c31\u4f1a\u81ea\u52a8\u89e6\u53d1bgsave\u547d\u4ee4\u521b\u5efa\u5feb\u7167\u3002<\/code><\/pre>\n<h3>RDB \u521b\u5efa\u5feb\u7167\u65f6\u4f1a\u963b\u585e\u4e3b\u7ebf\u7a0b\u5417\uff1f<\/h3>\n<p>Redis \u63d0\u4f9b\u4e86\u4e24\u4e2a\u547d\u4ee4\u6765\u751f\u6210 RDB \u5feb\u7167\u6587\u4ef6\uff1a<\/p>\n<ul>\n<li><code>save<\/code> : \u4e3b\u7ebf\u7a0b\u6267\u884c\uff0c\u4f1a\u963b\u585e\u4e3b\u7ebf\u7a0b\uff1b<\/li>\n<li><code>bgsave<\/code> : \u5b50\u7ebf\u7a0b\u6267\u884c\uff0c\u4e0d\u4f1a\u963b\u585e\u4e3b\u7ebf\u7a0b\uff0c\u9ed8\u8ba4\u9009\u9879\u3002<\/li>\n<\/ul>\n<h3>\u4ec0\u4e48\u662f AOF \u6301\u4e45\u5316\uff1f<\/h3>\n<p>\u4e0e\u5feb\u7167\u6301\u4e45\u5316\u76f8\u6bd4\uff0cAOF \u6301\u4e45\u5316\u7684\u5b9e\u65f6\u6027\u66f4\u597d\uff0c\u56e0\u6b64\u5df2\u6210\u4e3a\u4e3b\u6d41\u7684\u6301\u4e45\u5316\u65b9\u6848\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b Redis \u6ca1\u6709\u5f00\u542f AOF\uff08append only file\uff09\u65b9\u5f0f\u7684\u6301\u4e45\u5316\uff0c\u53ef\u4ee5\u901a\u8fc7 appendonly \u53c2\u6570\u5f00\u542f\uff1a<\/p>\n<pre><code class=\"bash\">appendonly yes<\/code><\/pre>\n<p>\u5f00\u542f AOF \u6301\u4e45\u5316\u540e\u6bcf\u6267\u884c\u4e00\u6761\u4f1a\u66f4\u6539 Redis \u4e2d\u7684\u6570\u636e\u7684\u547d\u4ee4\uff0cRedis \u5c31\u4f1a\u5c06\u8be5\u547d\u4ee4\u5199\u5165\u5230\u5185\u5b58\u7f13\u5b58 <code>server.aof_buf<\/code> \u4e2d\uff0c\u7136\u540e\u518d\u6839\u636e <code>appendfsync<\/code> \u914d\u7f6e\u6765\u51b3\u5b9a\u4f55\u65f6\u5c06\u5176\u540c\u6b65\u5230\u786c\u76d8\u4e2d\u7684 AOF \u6587\u4ef6\u3002<\/p>\n<p>AOF \u6587\u4ef6\u7684\u4fdd\u5b58\u4f4d\u7f6e\u548c RDB \u6587\u4ef6\u7684\u4f4d\u7f6e\u76f8\u540c\uff0c\u90fd\u662f\u901a\u8fc7 dir \u53c2\u6570\u8bbe\u7f6e\u7684\uff0c\u9ed8\u8ba4\u7684\u6587\u4ef6\u540d\u662f <code>appendonly.aof<\/code>\u3002<\/p>\n<p>\u5728 Redis \u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u5b58\u5728\u4e09\u79cd\u4e0d\u540c\u7684 AOF \u6301\u4e45\u5316\u65b9\u5f0f\uff0c\u5b83\u4eec\u5206\u522b\u662f\uff1a<\/p>\n<pre><code class=\"bash\">appendfsync always    #\u6bcf\u6b21\u6709\u6570\u636e\u4fee\u6539\u53d1\u751f\u65f6\u90fd\u4f1a\u5199\u5165AOF\u6587\u4ef6,\u8fd9\u6837\u4f1a\u4e25\u91cd\u964d\u4f4eRedis\u7684\u901f\u5ea6\nappendfsync everysec  #\u6bcf\u79d2\u949f\u540c\u6b65\u4e00\u6b21\uff0c\u663e\u5f0f\u5730\u5c06\u591a\u4e2a\u5199\u547d\u4ee4\u540c\u6b65\u5230\u786c\u76d8\nappendfsync no        #\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u51b3\u5b9a\u4f55\u65f6\u8fdb\u884c\u540c\u6b65<\/code><\/pre>\n<p>\u4e3a\u4e86\u517c\u987e\u6570\u636e\u548c\u5199\u5165\u6027\u80fd\uff0c\u7528\u6237\u53ef\u4ee5\u8003\u8651 <code>appendfsync everysec<\/code> \u9009\u9879 \uff0c\u8ba9 Redis \u6bcf\u79d2\u540c\u6b65\u4e00\u6b21 AOF \u6587\u4ef6\uff0cRedis \u6027\u80fd\u51e0\u4e4e\u6ca1\u53d7\u5230\u4efb\u4f55\u5f71\u54cd\u3002\u800c\u4e14\u8fd9\u6837\u5373\u4f7f\u51fa\u73b0\u7cfb\u7edf\u5d29\u6e83\uff0c\u7528\u6237\u6700\u591a\u53ea\u4f1a\u4e22\u5931\u4e00\u79d2\u4e4b\u5185\u4ea7\u751f\u7684\u6570\u636e\u3002\u5f53\u786c\u76d8\u5fd9\u4e8e\u6267\u884c\u5199\u5165\u64cd\u4f5c\u7684\u65f6\u5019\uff0cRedis \u8fd8\u4f1a\u4f18\u96c5\u7684\u653e\u6162\u81ea\u5df1\u7684\u901f\u5ea6\u4ee5\u4fbf\u9002\u5e94\u786c\u76d8\u7684\u6700\u5927\u5199\u5165\u901f\u5ea6\u3002<\/p>\n<p><strong>\u76f8\u5173 issue<\/strong> \uff1a<\/p>\n<ul>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=FB3gIW5Rlb9D5%2FtGOGt6%2FA%3D%3D.HIG3tPZtLHTJN85gVrhQepcrx6qID54uIQXPUCm3aUimdNvSpXYdhkNnUwoWpdrZLti%2Bbo77Osp4rViuyOxC6w%3D%3D\" rel=\"nofollow\">Redis \u7684 AOF \u65b9\u5f0f #783<\/a><\/li>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=m3RvvfCKtU1Da1YW5QmLUw%3D%3D.Wq0CRwU9Scenz%2F%2FjLprjGGATBwkbnJBVu5QwoBRJJ8N3HPm6BKXIZU9%2Bftbt5gY9BToX2Ur2YJiZjk4Vj%2FU%2B3w%3D%3D\" rel=\"nofollow\">Redis AOF \u91cd\u5199\u63cf\u8ff0\u4e0d\u51c6\u786e #1439<\/a><\/li>\n<\/ul>\n<h3>AOF \u65e5\u5fd7\u662f\u5982\u4f55\u5b9e\u73b0\u7684\uff1f<\/h3>\n<p>\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff08\u5982 MySQL\uff09\u901a\u5e38\u90fd\u662f\u6267\u884c\u547d\u4ee4\u4e4b\u524d\u8bb0\u5f55\u65e5\u5fd7\uff08\u65b9\u4fbf\u6545\u969c\u6062\u590d\uff09\uff0c\u800c Redis AOF \u6301\u4e45\u5316\u673a\u5236\u662f\u5728\u6267\u884c\u5b8c\u547d\u4ee4\u4e4b\u540e\u518d\u8bb0\u5f55\u65e5\u5fd7\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302904\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" title=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" loading=\"lazy\"><\/p>\n<p><strong>\u4e3a\u4ec0\u4e48\u662f\u5728\u6267\u884c\u5b8c\u547d\u4ee4\u4e4b\u540e\u8bb0\u5f55\u65e5\u5fd7\u5462\uff1f<\/strong><\/p>\n<ul>\n<li>\u907f\u514d\u989d\u5916\u7684\u68c0\u67e5\u5f00\u9500\uff0cAOF \u8bb0\u5f55\u65e5\u5fd7\u4e0d\u4f1a\u5bf9\u547d\u4ee4\u8fdb\u884c\u8bed\u6cd5\u68c0\u67e5\uff1b<\/li>\n<li>\u5728\u547d\u4ee4\u6267\u884c\u5b8c\u4e4b\u540e\u518d\u8bb0\u5f55\uff0c\u4e0d\u4f1a\u963b\u585e\u5f53\u524d\u7684\u547d\u4ee4\u6267\u884c\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u6837\u4e5f\u5e26\u6765\u4e86\u98ce\u9669\uff08\u6211\u5728\u524d\u9762\u4ecb\u7ecd AOF \u6301\u4e45\u5316\u7684\u65f6\u5019\u4e5f\u63d0\u5230\u8fc7\uff09\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u521a\u6267\u884c\u5b8c\u547d\u4ee4 Redis \u5c31\u5b95\u673a\u4f1a\u5bfc\u81f4\u5bf9\u5e94\u7684\u4fee\u6539\u4e22\u5931\uff1b<\/li>\n<li>\u53ef\u80fd\u4f1a\u963b\u585e\u540e\u7eed\u5176\u4ed6\u547d\u4ee4\u7684\u6267\u884c\uff08AOF \u8bb0\u5f55\u65e5\u5fd7\u662f\u5728 Redis \u4e3b\u7ebf\u7a0b\u4e2d\u8fdb\u884c\u7684\uff09\u3002<\/li>\n<\/ul>\n<h3>AOF \u91cd\u5199\u4e86\u89e3\u5417\uff1f<\/h3>\n<p>\u5f53 AOF \u53d8\u5f97\u592a\u5927\u65f6\uff0cRedis \u80fd\u591f\u5728\u540e\u53f0\u81ea\u52a8\u91cd\u5199 AOF \u4ea7\u751f\u4e00\u4e2a\u65b0\u7684 AOF \u6587\u4ef6\uff0c\u8fd9\u4e2a\u65b0\u7684 AOF \u6587\u4ef6\u548c\u539f\u6709\u7684 AOF \u6587\u4ef6\u6240\u4fdd\u5b58\u7684\u6570\u636e\u5e93\u72b6\u6001\u4e00\u6837\uff0c\u4f46\u4f53\u79ef\u66f4\u5c0f\u3002<\/p>\n<p>AOF \u91cd\u5199\u662f\u4e00\u4e2a\u6709\u6b67\u4e49\u7684\u540d\u5b57\uff0c\u8be5\u529f\u80fd\u662f\u901a\u8fc7\u8bfb\u53d6\u6570\u636e\u5e93\u4e2d\u7684\u952e\u503c\u5bf9\u6765\u5b9e\u73b0\u7684\uff0c\u7a0b\u5e8f\u65e0\u987b\u5bf9\u73b0\u6709 AOF \u6587\u4ef6\u8fdb\u884c\u4efb\u4f55\u8bfb\u5165\u3001\u5206\u6790\u6216\u8005\u5199\u5165\u64cd\u4f5c\u3002<\/p>\n<p>\u5728\u6267\u884c <code>BGREWRITEAOF<\/code> \u547d\u4ee4\u65f6\uff0cRedis \u670d\u52a1\u5668\u4f1a\u7ef4\u62a4\u4e00\u4e2a AOF \u91cd\u5199\u7f13\u51b2\u533a\uff0c\u8be5\u7f13\u51b2\u533a\u4f1a\u5728\u5b50\u8fdb\u7a0b\u521b\u5efa\u65b0 AOF \u6587\u4ef6\u671f\u95f4\uff0c\u8bb0\u5f55\u670d\u52a1\u5668\u6267\u884c\u7684\u6240\u6709\u5199\u547d\u4ee4\u3002\u5f53\u5b50\u8fdb\u7a0b\u5b8c\u6210\u521b\u5efa\u65b0 AOF \u6587\u4ef6\u7684\u5de5\u4f5c\u4e4b\u540e\uff0c\u670d\u52a1\u5668\u4f1a\u5c06\u91cd\u5199\u7f13\u51b2\u533a\u4e2d\u7684\u6240\u6709\u5185\u5bb9\u8ffd\u52a0\u5230\u65b0 AOF \u6587\u4ef6\u7684\u672b\u5c3e\uff0c\u4f7f\u5f97\u65b0\u7684 AOF \u6587\u4ef6\u4fdd\u5b58\u7684\u6570\u636e\u5e93\u72b6\u6001\u4e0e\u73b0\u6709\u7684\u6570\u636e\u5e93\u72b6\u6001\u4e00\u81f4\u3002\u6700\u540e\uff0c\u670d\u52a1\u5668\u7528\u65b0\u7684 AOF \u6587\u4ef6\u66ff\u6362\u65e7\u7684 AOF \u6587\u4ef6\uff0c\u4ee5\u6b64\u6765\u5b8c\u6210 AOF \u6587\u4ef6\u91cd\u5199\u64cd\u4f5c\u3002<\/p>\n<p>Redis 7.0 \u7248\u672c\u4e4b\u524d\uff0c\u5982\u679c\u5728\u91cd\u5199\u671f\u95f4\u6709\u5199\u5165\u547d\u4ee4\uff0cAOF \u53ef\u80fd\u4f1a\u4f7f\u7528\u5927\u91cf\u5185\u5b58\uff0c\u91cd\u5199\u671f\u95f4\u5230\u8fbe\u7684\u6240\u6709\u5199\u5165\u547d\u4ee4\u90fd\u4f1a\u5199\u5165\u78c1\u76d8\u4e24\u6b21\u3002<\/p>\n<h3>\u5982\u4f55\u9009\u62e9 RDB \u548c AOF\uff1f<\/h3>\n<p>\u5173\u4e8e RDB \u548c AOF \u7684\u4f18\u7f3a\u70b9\uff0c\u5b98\u7f51\u4e0a\u9762\u4e5f\u7ed9\u4e86\u6bd4\u8f83\u8be6\u7ec6\u7684\u8bf4\u660e<a href=\"https:\/\/link.segmentfault.com\/?enc=dHF60%2FZ2%2Buw9aCxer337mg%3D%3D.jFa2VA%2FcYUt8EUOi%2BcoR%2F%2F5s4ZEY9%2F6o3RQZO%2F1xCrzMot2x%2FMj%2FOKtbyGQg11Gs\" rel=\"nofollow\">Redis persistence<\/a>\uff0c\u8fd9\u91cc\u7ed3\u5408\u81ea\u5df1\u7684\u7406\u89e3\u7b80\u5355\u603b\u7ed3\u4e00\u4e0b\u3002<\/p>\n<p><strong>RDB \u6bd4 AOF \u4f18\u79c0\u7684\u5730\u65b9<\/strong> \uff1a<\/p>\n<ul>\n<li>RDB \u6587\u4ef6\u5b58\u50a8\u7684\u5185\u5bb9\u662f\u7ecf\u8fc7\u538b\u7f29\u7684\u4e8c\u8fdb\u5236\u6570\u636e\uff0c \u4fdd\u5b58\u7740\u67d0\u4e2a\u65f6\u95f4\u70b9\u7684\u6570\u636e\u96c6\uff0c\u6587\u4ef6\u5f88\u5c0f\uff0c\u9002\u5408\u505a\u6570\u636e\u7684\u5907\u4efd\uff0c\u707e\u96be\u6062\u590d\u3002AOF \u6587\u4ef6\u5b58\u50a8\u7684\u662f\u6bcf\u4e00\u6b21\u5199\u547d\u4ee4\uff0c\u7c7b\u4f3c\u4e8e MySQL \u7684 binlog \u65e5\u5fd7\uff0c\u901a\u5e38\u4f1a\u5fc5 RDB \u6587\u4ef6\u5927\u5f88\u591a\u3002\u5f53 AOF \u53d8\u5f97\u592a\u5927\u65f6\uff0cRedis \u80fd\u591f\u5728\u540e\u53f0\u81ea\u52a8\u91cd\u5199 AOF\u3002\u65b0\u7684 AOF \u6587\u4ef6\u548c\u539f\u6709\u7684 AOF \u6587\u4ef6\u6240\u4fdd\u5b58\u7684\u6570\u636e\u5e93\u72b6\u6001\u4e00\u6837\uff0c\u4f46\u4f53\u79ef\u66f4\u5c0f\u3002\u4e0d\u8fc7\uff0c Redis 7.0 \u7248\u672c\u4e4b\u524d\uff0c\u5982\u679c\u5728\u91cd\u5199\u671f\u95f4\u6709\u5199\u5165\u547d\u4ee4\uff0cAOF \u53ef\u80fd\u4f1a\u4f7f\u7528\u5927\u91cf\u5185\u5b58\uff0c\u91cd\u5199\u671f\u95f4\u5230\u8fbe\u7684\u6240\u6709\u5199\u5165\u547d\u4ee4\u90fd\u4f1a\u5199\u5165\u78c1\u76d8\u4e24\u6b21\u3002<\/li>\n<li>\u4f7f\u7528 RDB \u6587\u4ef6\u6062\u590d\u6570\u636e\uff0c\u76f4\u63a5\u89e3\u6790\u8fd8\u539f\u6570\u636e\u5373\u53ef\uff0c\u4e0d\u9700\u8981\u4e00\u6761\u4e00\u6761\u5730\u6267\u884c\u547d\u4ee4\uff0c\u901f\u5ea6\u975e\u5e38\u5feb\u3002\u800c AOF \u5219\u9700\u8981\u4f9d\u6b21\u6267\u884c\u6bcf\u4e2a\u5199\u547d\u4ee4\uff0c\u901f\u5ea6\u975e\u5e38\u6162\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0e AOF \u76f8\u6bd4\uff0c\u6062\u590d\u5927\u6570\u636e\u96c6\u7684\u65f6\u5019\uff0cRDB \u901f\u5ea6\u66f4\u5feb\u3002<\/li>\n<\/ul>\n<p><strong>AOF \u6bd4 RDB \u4f18\u79c0\u7684\u5730\u65b9<\/strong> \uff1a<\/p>\n<ul>\n<li>RDB \u7684\u6570\u636e\u5b89\u5168\u6027\u4e0d\u5982 AOF\uff0c\u6ca1\u6709\u529e\u6cd5\u5b9e\u65f6\u6216\u8005\u79d2\u7ea7\u6301\u4e45\u5316\u6570\u636e\u3002\u751f\u6210 RDB \u6587\u4ef6\u7684\u8fc7\u7a0b\u662f\u6bd4\u7e41\u91cd\u7684\uff0c \u867d\u7136 BGSAVE \u5b50\u8fdb\u7a0b\u5199\u5165 RDB \u6587\u4ef6\u7684\u5de5\u4f5c\u4e0d\u4f1a\u963b\u585e\u4e3b\u7ebf\u7a0b\uff0c\u4f46\u4f1a\u5bf9\u673a\u5668\u7684 CPU \u8d44\u6e90\u548c\u5185\u5b58\u8d44\u6e90\u4ea7\u751f\u5f71\u54cd\uff0c\u4e25\u91cd\u7684\u60c5\u51b5\u4e0b\u751a\u81f3\u4f1a\u76f4\u63a5\u628a Redis \u670d\u52a1\u5e72\u5b95\u673a\u3002AOF \u652f\u6301\u79d2\u7ea7\u6570\u636e\u4e22\u5931\uff08\u53d6\u51b3 fsync \u7b56\u7565\uff0c\u5982\u679c\u662f everysec\uff0c\u6700\u591a\u4e22\u5931 1 \u79d2\u7684\u6570\u636e\uff09\uff0c\u4ec5\u4ec5\u662f\u8ffd\u52a0\u547d\u4ee4\u5230 AOF \u6587\u4ef6\uff0c\u64cd\u4f5c\u8f7b\u91cf\u3002<\/li>\n<li>RDB \u6587\u4ef6\u662f\u4ee5\u7279\u5b9a\u7684\u4e8c\u8fdb\u5236\u683c\u5f0f\u4fdd\u5b58\u7684\uff0c\u5e76\u4e14\u5728 Redis \u7248\u672c\u6f14\u8fdb\u4e2d\u6709\u591a\u4e2a\u7248\u672c\u7684 RDB\uff0c\u6240\u4ee5\u5b58\u5728\u8001\u7248\u672c\u7684 Redis \u670d\u52a1\u4e0d\u517c\u5bb9\u65b0\u7248\u672c\u7684 RDB \u683c\u5f0f\u7684\u95ee\u9898\u3002<\/li>\n<li>AOF \u4ee5\u4e00\u79cd\u6613\u4e8e\u7406\u89e3\u548c\u89e3\u6790\u7684\u683c\u5f0f\u5305\u542b\u6240\u6709\u64cd\u4f5c\u7684\u65e5\u5fd7\u3002\u4f60\u53ef\u4ee5\u8f7b\u677e\u5730\u5bfc\u51fa AOF \u6587\u4ef6\u8fdb\u884c\u5206\u6790\uff0c\u4f60\u4e5f\u53ef\u4ee5\u76f4\u63a5\u64cd\u4f5c AOF \u6587\u4ef6\u6765\u89e3\u51b3\u4e00\u4e9b\u95ee\u9898\u3002\u6bd4\u5982\uff0c\u5982\u679c\u6267\u884c<code>FLUSHALL<\/code>\u547d\u4ee4\u610f\u5916\u5730\u5237\u65b0\u4e86\u6240\u6709\u5185\u5bb9\u540e\uff0c\u53ea\u8981 AOF \u6587\u4ef6\u6ca1\u6709\u88ab\u91cd\u5199\uff0c\u5220\u9664\u6700\u65b0\u547d\u4ee4\u5e76\u91cd\u542f\u5373\u53ef\u6062\u590d\u4e4b\u524d\u7684\u72b6\u6001\u3002<\/li>\n<\/ul>\n<h3>Redis 4.0 \u5bf9\u4e8e\u6301\u4e45\u5316\u673a\u5236\u505a\u4e86\u4ec0\u4e48\u4f18\u5316\uff1f<\/h3>\n<p>\u7531\u4e8e RDB \u548c AOF \u5404\u6709\u4f18\u52bf\uff0c\u4e8e\u662f\uff0cRedis 4.0 \u5f00\u59cb\u652f\u6301 RDB \u548c AOF \u7684\u6df7\u5408\u6301\u4e45\u5316\uff08\u9ed8\u8ba4\u5173\u95ed\uff0c\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u9879 <code>aof-use-rdb-preamble<\/code> \u5f00\u542f\uff09\u3002<\/p>\n<p>\u5982\u679c\u628a\u6df7\u5408\u6301\u4e45\u5316\u6253\u5f00\uff0cAOF \u91cd\u5199\u7684\u65f6\u5019\u5c31\u76f4\u63a5\u628a RDB \u7684\u5185\u5bb9\u5199\u5230 AOF \u6587\u4ef6\u5f00\u5934\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u53ef\u4ee5\u7ed3\u5408 RDB \u548c AOF \u7684\u4f18\u70b9, \u5feb\u901f\u52a0\u8f7d\u540c\u65f6\u907f\u514d\u4e22\u5931\u8fc7\u591a\u7684\u6570\u636e\u3002\u5f53\u7136\u7f3a\u70b9\u4e5f\u662f\u6709\u7684\uff0c AOF \u91cc\u9762\u7684 RDB \u90e8\u5206\u662f\u538b\u7f29\u683c\u5f0f\u4e0d\u518d\u662f AOF \u683c\u5f0f\uff0c\u53ef\u8bfb\u6027\u8f83\u5dee\u3002<\/p>\n<p>\u5b98\u65b9\u6587\u6863\u5730\u5740\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=DiXbjSAqDYRJ9SM7d0mpIA%3D%3D.lAE2NOi2wDoJuKEzQkDpnZZEfllWBFQ0govZ5QN%2BzjXzGPFM9jbYXBeaa7PXxPKj\" rel=\"nofollow\">https:\/\/redis.io\/topics\/persi&#8230;<\/a><\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302905\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2>Redis \u4e8b\u52a1<\/h2>\n<h3>\u5982\u4f55\u4f7f\u7528 Redis \u4e8b\u52a1\uff1f<\/h3>\n<p>Redis \u53ef\u4ee5\u901a\u8fc7 <strong><code>MULTI<\/code>\uff0c<code>EXEC<\/code>\uff0c<code>DISCARD<\/code> \u548c <code>WATCH<\/code><\/strong> \u7b49\u547d\u4ee4\u6765\u5b9e\u73b0\u4e8b\u52a1(transaction)\u529f\u80fd\u3002<\/p>\n<pre><code class=\"bash\">&gt; MULTI\nOK\n&gt; SET PROJECT &quot;JavaGuide&quot;\nQUEUED\n&gt; GET PROJECT\nQUEUED\n&gt; EXEC\n1) OK\n2) &quot;JavaGuide&quot;<\/code><\/pre>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=71WiEwXdvn%2FkpGhQmx12BA%3D%3D.8E3NE18uSnyXnAhG11TXnBebn5Hk4jcvR18%2BsgK8GC0%3D\" rel=\"nofollow\"><code>MULTI<\/code><\/a> \u547d\u4ee4\u540e\u53ef\u4ee5\u8f93\u5165\u591a\u4e2a\u547d\u4ee4\uff0cRedis \u4e0d\u4f1a\u7acb\u5373\u6267\u884c\u8fd9\u4e9b\u547d\u4ee4\uff0c\u800c\u662f\u5c06\u5b83\u4eec\u653e\u5230\u961f\u5217\uff0c\u5f53\u8c03\u7528\u4e86 <a href=\"https:\/\/link.segmentfault.com\/?enc=hyGe%2B2dCDHE8vEV3nm7IYQ%3D%3D.%2BPoRgKJKg%2B3ULFiTiMqBrUyhTeqyM7Stvoo0g5jGwkc%3D\" rel=\"nofollow\"><code>EXEC<\/code><\/a> \u547d\u4ee4\u540e\uff0c\u518d\u6267\u884c\u6240\u6709\u7684\u547d\u4ee4\u3002<\/p>\n<p>\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<ol>\n<li>\u5f00\u59cb\u4e8b\u52a1\uff08<code>MULTI<\/code>\uff09\uff1b<\/li>\n<li>\u547d\u4ee4\u5165\u961f(\u6279\u91cf\u64cd\u4f5c Redis \u7684\u547d\u4ee4\uff0c\u5148\u8fdb\u5148\u51fa\uff08FIFO\uff09\u7684\u987a\u5e8f\u6267\u884c)\uff1b<\/li>\n<li>\u6267\u884c\u4e8b\u52a1(<code>EXEC<\/code>)\u3002<\/li>\n<\/ol>\n<p>\u4f60\u4e5f\u53ef\u4ee5\u901a\u8fc7 <a href=\"https:\/\/link.segmentfault.com\/?enc=f1RQEXttTcVqGmB8PZLFGg%3D%3D.R%2FpotAeTNBR79qHwltkhi4dYomSu3xVFrN94u%2BbiIdN12XubzITwU5pDOcUbL%2Fz8\" rel=\"nofollow\"><code>DISCARD<\/code><\/a> \u547d\u4ee4\u53d6\u6d88\u4e00\u4e2a\u4e8b\u52a1\uff0c\u5b83\u4f1a\u6e05\u7a7a\u4e8b\u52a1\u961f\u5217\u4e2d\u4fdd\u5b58\u7684\u6240\u6709\u547d\u4ee4\u3002<\/p>\n<pre><code class=\"bash\">&gt; MULTI\nOK\n&gt; SET PROJECT &quot;JavaGuide&quot;\nQUEUED\n&gt; GET PROJECT\nQUEUED\n&gt; DISCARD\nOK<\/code><\/pre>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7<a href=\"https:\/\/link.segmentfault.com\/?enc=HQJw5%2B15sEC03xzrDaL%2Ftg%3D%3D.im%2F%2BOGQvMO1TfW%2By3sfIYtbBkAivAmU3GwLjLNmhSs8%3D\" rel=\"nofollow\"><code>WATCH<\/code><\/a> \u547d\u4ee4\u76d1\u542c\u6307\u5b9a\u7684 Key\uff0c\u5f53\u8c03\u7528 <code>EXEC<\/code> \u547d\u4ee4\u6267\u884c\u4e8b\u52a1\u65f6\uff0c\u5982\u679c\u4e00\u4e2a\u88ab <code>WATCH<\/code> \u547d\u4ee4\u76d1\u89c6\u7684 Key \u88ab <strong>\u5176\u4ed6\u5ba2\u6237\u7aef\/Session<\/strong> \u4fee\u6539\u7684\u8bdd\uff0c\u6574\u4e2a\u4e8b\u52a1\u90fd\u4e0d\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n<pre><code class=\"bash\"># \u5ba2\u6237\u7aef 1\n&gt; SET PROJECT &quot;RustGuide&quot;\nOK\n&gt; WATCH PROJECT\nOK\n&gt; MULTI\nOK\n&gt; SET PROJECT &quot;JavaGuide&quot;\nQUEUED\n\n# \u5ba2\u6237\u7aef 2\n# \u5728\u5ba2\u6237\u7aef 1 \u6267\u884c EXEC \u547d\u4ee4\u63d0\u4ea4\u4e8b\u52a1\u4e4b\u524d\u4fee\u6539 PROJECT \u7684\u503c\n&gt; SET PROJECT &quot;GoGuide&quot;\n\n# \u5ba2\u6237\u7aef 1\n# \u4fee\u6539\u5931\u8d25\uff0c\u56e0\u4e3a PROJECT \u7684\u503c\u88ab\u5ba2\u6237\u7aef2\u4fee\u6539\u4e86\n&gt; EXEC\n(nil)\n&gt; GET PROJECT\n&quot;GoGuide&quot;<\/code><\/pre>\n<p>\u4e0d\u8fc7\uff0c\u5982\u679c <strong>WATCH<\/strong> \u4e0e <strong>\u4e8b\u52a1<\/strong> \u5728\u540c\u4e00\u4e2a Session \u91cc\uff0c\u5e76\u4e14\u88ab <strong>WATCH<\/strong> \u76d1\u89c6\u7684 Key \u88ab\u4fee\u6539\u7684\u64cd\u4f5c\u53d1\u751f\u5728\u4e8b\u52a1\u5185\u90e8\uff0c\u8fd9\u4e2a\u4e8b\u52a1\u662f\u53ef\u4ee5\u88ab\u6267\u884c\u6210\u529f\u7684\uff08\u76f8\u5173 issue \uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=oyb%2BFgDj0KwLkvSmg3ZrxA%3D%3D.bR72dUVMRwZw3NLw3XPDIwiikp7906xg614HcMRSqR0OfoOPV56cRLbGgjBpzLvCz%2FeS2I%2Bi5y76CaS%2FxE1EDg%3D%3D\" rel=\"nofollow\">WATCH \u547d\u4ee4\u78b0\u5230 MULTI \u547d\u4ee4\u65f6\u7684\u4e0d\u540c\u6548\u679c<\/a>\uff09\u3002<\/p>\n<p>\u4e8b\u52a1\u5185\u90e8\u4fee\u6539 WATCH \u76d1\u89c6\u7684 Key\uff1a<\/p>\n<pre><code class=\"bash\">&gt; SET PROJECT &quot;JavaGuide&quot;\nOK\n&gt; WATCH PROJECT\nOK\n&gt; MULTI\nOK\n&gt; SET PROJECT &quot;JavaGuide1&quot;\nQUEUED\n&gt; SET PROJECT &quot;JavaGuide2&quot;\nQUEUED\n&gt; SET PROJECT &quot;JavaGuide3&quot;\nQUEUED\n&gt; EXEC\n1) OK\n2) OK\n3) OK\n127.0.0.1:6379&gt; GET PROJECT\n&quot;JavaGuide3&quot;<\/code><\/pre>\n<p>\u4e8b\u52a1\u5916\u90e8\u4fee\u6539 WATCH \u76d1\u89c6\u7684 Key\uff1a<\/p>\n<pre><code class=\"bash\">&gt; SET PROJECT &quot;JavaGuide&quot;\nOK\n&gt; WATCH PROJECT\nOK\n&gt; SET PROJECT &quot;JavaGuide2&quot;\nOK\n&gt; MULTI\nOK\n&gt; GET USER\nQUEUED\n&gt; EXEC\n(nil)<\/code><\/pre>\n<p>Redis \u5b98\u7f51\u76f8\u5173\u4ecb\u7ecd <a href=\"https:\/\/link.segmentfault.com\/?enc=0mmmQEAEJD8UX8Og4Ys7IQ%3D%3D.dnwY8GRY21O1bqB6zlJlPTePVvHz%2FfiqC1j%2BTIK49%2ByhxEcdlFbsnZk4Fw8lLySv\" rel=\"nofollow\">https:\/\/redis.io\/topics\/transactions<\/a> \u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302906\" alt=\"Redis \u4e8b\u52a1\" title=\"Redis \u4e8b\u52a1\" loading=\"lazy\"><\/p>\n<h3>Redis \u652f\u6301\u539f\u5b50\u6027\u5417\uff1f<\/h3>\n<p>Redis \u7684\u4e8b\u52a1\u548c\u6211\u4eec\u5e73\u65f6\u7406\u89e3\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u4e8b\u52a1\u4e0d\u540c\u3002\u6211\u4eec\u77e5\u9053\u4e8b\u52a1\u5177\u6709\u56db\u5927\u7279\u6027\uff1a <strong>1. \u539f\u5b50\u6027<\/strong>\uff0c<strong>2. \u9694\u79bb\u6027<\/strong>\uff0c<strong>3. \u6301\u4e45\u6027<\/strong>\uff0c<strong>4. \u4e00\u81f4\u6027<\/strong>\u3002<\/p>\n<ol>\n<li><strong>\u539f\u5b50\u6027\uff08Atomicity\uff09\uff1a<\/strong> \u4e8b\u52a1\u662f\u6700\u5c0f\u7684\u6267\u884c\u5355\u4f4d\uff0c\u4e0d\u5141\u8bb8\u5206\u5272\u3002\u4e8b\u52a1\u7684\u539f\u5b50\u6027\u786e\u4fdd\u52a8\u4f5c\u8981\u4e48\u5168\u90e8\u5b8c\u6210\uff0c\u8981\u4e48\u5b8c\u5168\u4e0d\u8d77\u4f5c\u7528\uff1b<\/li>\n<li><strong>\u9694\u79bb\u6027\uff08Isolation\uff09\uff1a<\/strong> \u5e76\u53d1\u8bbf\u95ee\u6570\u636e\u5e93\u65f6\uff0c\u4e00\u4e2a\u7528\u6237\u7684\u4e8b\u52a1\u4e0d\u88ab\u5176\u4ed6\u4e8b\u52a1\u6240\u5e72\u6270\uff0c\u5404\u5e76\u53d1\u4e8b\u52a1\u4e4b\u95f4\u6570\u636e\u5e93\u662f\u72ec\u7acb\u7684\uff1b<\/li>\n<li><strong>\u6301\u4e45\u6027\uff08Durability\uff09\uff1a<\/strong> \u4e00\u4e2a\u4e8b\u52a1\u88ab\u63d0\u4ea4\u4e4b\u540e\u3002\u5b83\u5bf9\u6570\u636e\u5e93\u4e2d\u6570\u636e\u7684\u6539\u53d8\u662f\u6301\u4e45\u7684\uff0c\u5373\u4f7f\u6570\u636e\u5e93\u53d1\u751f\u6545\u969c\u4e5f\u4e0d\u5e94\u8be5\u5bf9\u5176\u6709\u4efb\u4f55\u5f71\u54cd\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027\uff08Consistency\uff09\uff1a<\/strong> \u6267\u884c\u4e8b\u52a1\u524d\u540e\uff0c\u6570\u636e\u4fdd\u6301\u4e00\u81f4\uff0c\u591a\u4e2a\u4e8b\u52a1\u5bf9\u540c\u4e00\u4e2a\u6570\u636e\u8bfb\u53d6\u7684\u7ed3\u679c\u662f\u76f8\u540c\u7684\uff1b<\/li>\n<\/ol>\n<p>Redis \u4e8b\u52a1\u5728\u8fd0\u884c\u9519\u8bef\u7684\u60c5\u51b5\u4e0b\uff0c\u9664\u4e86\u6267\u884c\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u9519\u8bef\u7684\u547d\u4ee4\u5916\uff0c\u5176\u4ed6\u547d\u4ee4\u90fd\u80fd\u6b63\u5e38\u6267\u884c\u3002\u5e76\u4e14\uff0cRedis \u662f\u4e0d\u652f\u6301\u56de\u6eda\uff08roll back\uff09\u64cd\u4f5c\u7684\u3002\u56e0\u6b64\uff0cRedis \u4e8b\u52a1\u5176\u5b9e\u662f\u4e0d\u6ee1\u8db3\u539f\u5b50\u6027\u7684\uff08\u800c\u4e14\u4e0d\u6ee1\u8db3\u6301\u4e45\u6027\uff09\u3002<\/p>\n<p>Redis \u5b98\u7f51\u4e5f\u89e3\u91ca\u4e86\u81ea\u5df1\u4e3a\u5565\u4e0d\u652f\u6301\u56de\u6eda\u3002\u7b80\u5355\u6765\u8bf4\u5c31\u662f Redis \u5f00\u53d1\u8005\u4eec\u89c9\u5f97\u6ca1\u5fc5\u8981\u652f\u6301\u56de\u6eda\uff0c\u8fd9\u6837\u66f4\u7b80\u5355\u4fbf\u6377\u5e76\u4e14\u6027\u80fd\u66f4\u597d\u3002Redis \u5f00\u53d1\u8005\u89c9\u5f97\u5373\u4f7f\u547d\u4ee4\u6267\u884c\u9519\u8bef\u4e5f\u5e94\u8be5\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u5c31\u88ab\u53d1\u73b0\u800c\u4e0d\u662f\u751f\u4ea7\u8fc7\u7a0b\u4e2d\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302907\" alt=\"Redis \u4e3a\u4ec0\u4e48\u4e0d\u652f\u6301\u56de\u6eda\" title=\"Redis \u4e3a\u4ec0\u4e48\u4e0d\u652f\u6301\u56de\u6eda\" loading=\"lazy\"><\/p>\n<p>\u4f60\u53ef\u4ee5\u5c06 Redis \u4e2d\u7684\u4e8b\u52a1\u5c31\u7406\u89e3\u4e3a \uff1a<strong>Redis \u4e8b\u52a1\u63d0\u4f9b\u4e86\u4e00\u79cd\u5c06\u591a\u4e2a\u547d\u4ee4\u8bf7\u6c42\u6253\u5305\u7684\u529f\u80fd\u3002\u7136\u540e\uff0c\u518d\u6309\u987a\u5e8f\u6267\u884c\u6253\u5305\u7684\u6240\u6709\u547d\u4ee4\uff0c\u5e76\u4e14\u4e0d\u4f1a\u88ab\u4e2d\u9014\u6253\u65ad\u3002<\/strong><\/p>\n<p>\u9664\u4e86\u4e0d\u6ee1\u8db3\u539f\u5b50\u6027\u4e4b\u5916\uff0c\u4e8b\u52a1\u4e2d\u7684\u6bcf\u6761\u547d\u4ee4\u90fd\u4f1a\u4e0e Redis \u670d\u52a1\u5668\u8fdb\u884c\u7f51\u7edc\u4ea4\u4e92\uff0c\u8fd9\u662f\u6bd4\u8f83\u6d6a\u8d39\u8d44\u6e90\u7684\u884c\u4e3a\u3002\u660e\u660e\u4e00\u6b21\u6279\u91cf\u6267\u884c\u591a\u4e2a\u547d\u4ee4\u5c31\u53ef\u4ee5\u4e86\uff0c\u8fd9\u79cd\u64cd\u4f5c\u5b9e\u5728\u662f\u770b\u4e0d\u61c2\u3002<\/p>\n<p>\u56e0\u6b64\uff0cRedis \u4e8b\u52a1\u662f\u4e0d\u5efa\u8bae\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\u4f7f\u7528\u7684\u3002<\/p>\n<p><strong>\u76f8\u5173 issue<\/strong> :<\/p>\n<ul>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=tCd48Jjysy0%2B5FUdasY16w%3D%3D.9MMqSr6EmCCLMX3SBuG%2BTX88cjO7ffpACYMklDuqC6%2BuhKnX1VEEdc56qYJQVYvASDhGpAN93HrTfbzrm8qSqg%3D%3D\" rel=\"nofollow\">issue452: \u5173\u4e8e Redis \u4e8b\u52a1\u4e0d\u6ee1\u8db3\u539f\u5b50\u6027\u7684\u95ee\u9898<\/a> \u3002<\/li>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=VMRvEDrZPoXDMLQ5Hy0jKA%3D%3D.nQHXbRzvA%2B2Nw16cedHfJDsymgrXqF0shVSWEJaBnkaIn3gW%2BLgd2gVn%2B%2Fs%2FDEnYlrAHKBoiaIaR5FHaJxKzew%3D%3D\" rel=\"nofollow\">Issue491:\u5173\u4e8e redis \u6ca1\u6709\u4e8b\u52a1\u56de\u6eda\uff1f<\/a><\/li>\n<\/ul>\n<h3>\u5982\u4f55\u89e3\u51b3 Redis \u4e8b\u52a1\u7684\u7f3a\u9677\uff1f<\/h3>\n<p>Redis \u4ece 2.6 \u7248\u672c\u5f00\u59cb\u652f\u6301\u6267\u884c Lua \u811a\u672c\uff0c\u5b83\u7684\u529f\u80fd\u548c\u4e8b\u52a1\u975e\u5e38\u7c7b\u4f3c\u3002\u6211\u4eec\u53ef\u4ee5\u5229\u7528 Lua \u811a\u672c\u6765\u6279\u91cf\u6267\u884c\u591a\u6761 Redis \u547d\u4ee4\uff0c\u8fd9\u4e9b Redis \u547d\u4ee4\u4f1a\u88ab\u63d0\u4ea4\u5230 Redis \u670d\u52a1\u5668\u4e00\u6b21\u6027\u6267\u884c\u5b8c\u6210\uff0c\u5927\u5e45\u51cf\u5c0f\u4e86\u7f51\u7edc\u5f00\u9500\u3002<\/p>\n<p>\u4e00\u6bb5 Lua \u811a\u672c\u53ef\u4ee5\u89c6\u4f5c\u4e00\u6761\u547d\u4ee4\u6267\u884c\uff0c\u4e00\u6bb5 Lua \u811a\u672c\u6267\u884c\u8fc7\u7a0b\u4e2d\u4e0d\u4f1a\u6709\u5176\u4ed6\u811a\u672c\u6216 Redis \u547d\u4ee4\u540c\u65f6\u6267\u884c\uff0c\u4fdd\u8bc1\u4e86\u64cd\u4f5c\u4e0d\u4f1a\u88ab\u5176\u4ed6\u6307\u4ee4\u63d2\u5165\u6216\u6253\u6270\u3002<\/p>\n<p>\u5982\u679c Lua \u811a\u672c\u8fd0\u884c\u65f6\u51fa\u9519\u5e76\u4e2d\u9014\u7ed3\u675f\uff0c\u51fa\u9519\u4e4b\u540e\u7684\u547d\u4ee4\u662f\u4e0d\u4f1a\u88ab\u6267\u884c\u7684\u3002\u5e76\u4e14\uff0c\u51fa\u9519\u4e4b\u524d\u6267\u884c\u7684\u547d\u4ee4\u662f\u65e0\u6cd5\u88ab\u64a4\u9500\u7684\u3002\u56e0\u6b64\uff0c\u4e25\u683c\u6765\u8bf4\uff0c\u901a\u8fc7 Lua \u811a\u672c\u6765\u6279\u91cf\u6267\u884c Redis \u547d\u4ee4\u4e5f\u662f\u4e0d\u6ee1\u8db3\u539f\u5b50\u6027\u7684\u3002<\/p>\n<p>\u53e6\u5916\uff0cRedis 7.0 \u65b0\u589e\u4e86 <a href=\"https:\/\/link.segmentfault.com\/?enc=0stv1bhMBnPDqPtjg%2BLJgA%3D%3D.R7ri9tlhoVsf1xs1Y0fktYq4C4rTrB0TtouEt9vSDMvg1RL6cv35AgHeVlAim8KC%2Fvs%2BkIpTC3pSC9UrTNUbyA%3D%3D\" rel=\"nofollow\">Redis functions<\/a> \u7279\u6027\uff0c\u4f60\u53ef\u4ee5\u5c06 Redis functions \u770b\u4f5c\u662f\u6bd4 Lua \u66f4\u5f3a\u5927\u7684\u811a\u672c\u3002<\/p>\n<h2>Redis \u6027\u80fd\u4f18\u5316<\/h2>\n<h3>Redis bigkey<\/h3>\n<h4>\u4ec0\u4e48\u662f bigkey\uff1f<\/h4>\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u5982\u679c\u4e00\u4e2a key \u5bf9\u5e94\u7684 value \u6240\u5360\u7528\u7684\u5185\u5b58\u6bd4\u8f83\u5927\uff0c\u90a3\u8fd9\u4e2a key \u5c31\u53ef\u4ee5\u770b\u4f5c\u662f bigkey\u3002\u5177\u4f53\u591a\u5927\u624d\u7b97\u5927\u5462\uff1f\u6709\u4e00\u4e2a\u4e0d\u662f\u7279\u522b\u7cbe\u786e\u7684\u53c2\u8003\u6807\u51c6\uff1astring \u7c7b\u578b\u7684 value \u8d85\u8fc7 10 kb\uff0c\u590d\u5408\u7c7b\u578b\u7684 value \u5305\u542b\u7684\u5143\u7d20\u8d85\u8fc7 5000 \u4e2a\uff08\u5bf9\u4e8e\u590d\u5408\u7c7b\u578b\u7684 value \u6765\u8bf4\uff0c\u4e0d\u4e00\u5b9a\u5305\u542b\u7684\u5143\u7d20\u8d8a\u591a\uff0c\u5360\u7528\u7684\u5185\u5b58\u5c31\u8d8a\u591a\uff09\u3002<\/p>\n<h4>bigkey \u6709\u4ec0\u4e48\u5371\u5bb3\uff1f<\/h4>\n<p>\u9664\u4e86\u4f1a\u6d88\u8017\u66f4\u591a\u7684\u5185\u5b58\u7a7a\u95f4\uff0cbigkey \u5bf9\u6027\u80fd\u4e5f\u4f1a\u6709\u6bd4\u8f83\u5927\u7684\u5f71\u54cd\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u6211\u4eec\u5e94\u8be5\u5c3d\u91cf\u907f\u514d\u5199\u5165 bigkey\uff01<\/p>\n<h4>\u5982\u4f55\u53d1\u73b0 bigkey\uff1f<\/h4>\n<p><strong>1\u3001\u4f7f\u7528 Redis \u81ea\u5e26\u7684 <code>--bigkeys<\/code> \u53c2\u6570\u6765\u67e5\u627e\u3002<\/strong><\/p>\n<pre><code class=\"bash\"># redis-cli -p 6379 --bigkeys\n\n# Scanning the entire keyspace to find biggest keys as well as\n# average sizes per key type.  You can use -i 0.1 to sleep 0.1 sec\n# per 100 SCAN commands (not usually needed).\n\n[00.00%] Biggest string found so far '&quot;ballcat:oauth:refresh_auth:f6cdb384-9a9d-4f2f-af01-dc3f28057c20&quot;' with 4437 bytes\n[00.00%] Biggest list   found so far '&quot;my-list&quot;' with 17 items\n\n-------- summary -------\n\nSampled 5 keys in the keyspace!\nTotal key length in bytes is 264 (avg len 52.80)\n\nBiggest   list found '&quot;my-list&quot;' has 17 items\nBiggest string found '&quot;ballcat:oauth:refresh_auth:f6cdb384-9a9d-4f2f-af01-dc3f28057c20&quot;' has 4437 bytes\n\n1 lists with 17 items (20.00% of keys, avg size 17.00)\n0 hashs with 0 fields (00.00% of keys, avg size 0.00)\n4 strings with 4831 bytes (80.00% of keys, avg size 1207.75)\n0 streams with 0 entries (00.00% of keys, avg size 0.00)\n0 sets with 0 members (00.00% of keys, avg size 0.00)\n0 zsets with 0 members (00.00% of keys, avg size 0.00<\/code><\/pre>\n<p>\u4ece\u8fd9\u4e2a\u547d\u4ee4\u7684\u8fd0\u884c\u7ed3\u679c\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff1a\u8fd9\u4e2a\u547d\u4ee4\u4f1a\u626b\u63cf(Scan) Redis \u4e2d\u7684\u6240\u6709 key \uff0c\u4f1a\u5bf9 Redis \u7684\u6027\u80fd\u6709\u4e00\u70b9\u5f71\u54cd\u3002\u5e76\u4e14\uff0c\u8fd9\u79cd\u65b9\u5f0f\u53ea\u80fd\u627e\u51fa\u6bcf\u79cd\u6570\u636e\u7ed3\u6784 top 1 bigkey\uff08\u5360\u7528\u5185\u5b58\u6700\u5927\u7684 string \u6570\u636e\u7c7b\u578b\uff0c\u5305\u542b\u5143\u7d20\u6700\u591a\u7684\u590d\u5408\u6570\u636e\u7c7b\u578b\uff09\u3002<\/p>\n<p><strong>2\u3001\u5206\u6790 RDB \u6587\u4ef6<\/strong><\/p>\n<p>\u901a\u8fc7\u5206\u6790 RDB \u6587\u4ef6\u6765\u627e\u51fa big key\u3002\u8fd9\u79cd\u65b9\u6848\u7684\u524d\u63d0\u662f\u4f60\u7684 Redis \u91c7\u7528\u7684\u662f RDB \u6301\u4e45\u5316\u3002<\/p>\n<p>\u7f51\u4e0a\u6709\u73b0\u6210\u7684\u4ee3\u7801\/\u5de5\u5177\u53ef\u4ee5\u76f4\u63a5\u62ff\u6765\u4f7f\u7528\uff1a<\/p>\n<ul>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=AwBFirP%2Bam9O13jyqMG5yw%3D%3D.fo5K7UWUSEAPGQMKH5CbjoPqd1s8AklgcmF05zP0fQmWx%2B2HQUsVlDJ7jYkediuAs6V6%2FOxoN1V1i3stnVRVLA%3D%3D\" rel=\"nofollow\">redis-rdb-tools<\/a> \uff1aPython \u8bed\u8a00\u5199\u7684\u7528\u6765\u5206\u6790 Redis \u7684 RDB \u5feb\u7167\u6587\u4ef6\u7528\u7684\u5de5\u5177<\/li>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=g3IkZiGl%2BCKv1scX962Hqw%3D%3D.Ts02uD1g%2F6fiwmpkjpSHK1QK%2Fd%2FRDGazZ3Kgi0x4emnPoy84hK27n9IClp7M0PvA\" rel=\"nofollow\">rdb_bigkeys<\/a> : Go \u8bed\u8a00\u5199\u7684\u7528\u6765\u5206\u6790 Redis \u7684 RDB \u5feb\u7167\u6587\u4ef6\u7528\u7684\u5de5\u5177\uff0c\u6027\u80fd\u66f4\u597d\u3002<\/li>\n<\/ul>\n<h3>\u5927\u91cf key \u96c6\u4e2d\u8fc7\u671f\u95ee\u9898<\/h3>\n<p>\u6211\u5728\u4e0a\u9762\u63d0\u5230\u8fc7\uff1a\u5bf9\u4e8e\u8fc7\u671f key\uff0cRedis \u91c7\u7528\u7684\u662f <strong>\u5b9a\u671f\u5220\u9664+\u60f0\u6027\/\u61d2\u6c49\u5f0f\u5220\u9664<\/strong> \u7b56\u7565\u3002<\/p>\n<p>\u5b9a\u671f\u5220\u9664\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u7a81\u7136\u9047\u5230\u5927\u91cf\u8fc7\u671f key \u7684\u8bdd\uff0c\u5ba2\u6237\u7aef\u8bf7\u6c42\u5fc5\u987b\u7b49\u5f85\u5b9a\u671f\u6e05\u7406\u8fc7\u671f key \u4efb\u52a1\u7ebf\u7a0b\u6267\u884c\u5b8c\u6210\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u8fd9\u4e2a\u5b9a\u671f\u4efb\u52a1\u7ebf\u7a0b\u662f\u5728 Redis \u4e3b\u7ebf\u7a0b\u4e2d\u6267\u884c\u7684\u3002\u8fd9\u5c31\u5bfc\u81f4\u5ba2\u6237\u7aef\u8bf7\u6c42\u6ca1\u529e\u6cd5\u88ab\u53ca\u65f6\u5904\u7406\uff0c\u54cd\u5e94\u901f\u5ea6\u4f1a\u6bd4\u8f83\u6162\u3002<\/p>\n<p>\u5982\u4f55\u89e3\u51b3\u5462\uff1f\u4e0b\u9762\u662f\u4e24\u79cd\u5e38\u89c1\u7684\u65b9\u6cd5\uff1a<\/p>\n<ol>\n<li>\u7ed9 key \u8bbe\u7f6e\u968f\u673a\u8fc7\u671f\u65f6\u95f4\u3002<\/li>\n<li>\u5f00\u542f lazy-free\uff08\u60f0\u6027\u5220\u9664\/\u5ef6\u8fdf\u91ca\u653e\uff09 \u3002lazy-free \u7279\u6027\u662f Redis 4.0 \u5f00\u59cb\u5f15\u5165\u7684\uff0c\u6307\u7684\u662f\u8ba9 Redis \u91c7\u7528\u5f02\u6b65\u65b9\u5f0f\u5ef6\u8fdf\u91ca\u653e key \u4f7f\u7528\u7684\u5185\u5b58\uff0c\u5c06\u8be5\u64cd\u4f5c\u4ea4\u7ed9\u5355\u72ec\u7684\u5b50\u7ebf\u7a0b\u5904\u7406\uff0c\u907f\u514d\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002<\/li>\n<\/ol>\n<p>\u4e2a\u4eba\u5efa\u8bae\u4e0d\u7ba1\u662f\u5426\u5f00\u542f lazy-free\uff0c\u6211\u4eec\u90fd\u5c3d\u91cf\u7ed9 key \u8bbe\u7f6e\u968f\u673a\u8fc7\u671f\u65f6\u95f4\u3002<\/p>\n<h2>Redis \u751f\u4ea7\u95ee\u9898<\/h2>\n<h3>\u7f13\u5b58\u7a7f\u900f<\/h3>\n<h4>\u4ec0\u4e48\u662f\u7f13\u5b58\u7a7f\u900f\uff1f<\/h4>\n<p>\u7f13\u5b58\u7a7f\u900f\u8bf4\u7b80\u5355\u70b9\u5c31\u662f\u5927\u91cf\u8bf7\u6c42\u7684 key \u662f\u4e0d\u5408\u7406\u7684\uff0c<strong>\u6839\u672c\u4e0d\u5b58\u5728\u4e8e\u7f13\u5b58\u4e2d\uff0c\u4e5f\u4e0d\u5b58\u5728\u4e8e\u6570\u636e\u5e93\u4e2d<\/strong> \u3002\u8fd9\u5c31\u5bfc\u81f4\u8fd9\u4e9b\u8bf7\u6c42\u76f4\u63a5\u5230\u4e86\u6570\u636e\u5e93\u4e0a\uff0c\u6839\u672c\u6ca1\u6709\u7ecf\u8fc7\u7f13\u5b58\u8fd9\u4e00\u5c42\uff0c\u5bf9\u6570\u636e\u5e93\u9020\u6210\u4e86\u5de8\u5927\u7684\u538b\u529b\uff0c\u53ef\u80fd\u76f4\u63a5\u5c31\u88ab\u8fd9\u4e48\u591a\u8bf7\u6c42\u5f04\u5b95\u673a\u4e86\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302908\" alt=\"\u7f13\u5b58\u7a7f\u900f\" title=\"\u7f13\u5b58\u7a7f\u900f\" loading=\"lazy\"><\/p>\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u67d0\u4e2a\u9ed1\u5ba2\u6545\u610f\u5236\u9020\u4e00\u4e9b\u975e\u6cd5\u7684 key \u53d1\u8d77\u5927\u91cf\u8bf7\u6c42\uff0c\u5bfc\u81f4\u5927\u91cf\u8bf7\u6c42\u843d\u5230\u6570\u636e\u5e93\uff0c\u7ed3\u679c\u6570\u636e\u5e93\u4e0a\u4e5f\u6ca1\u6709\u67e5\u5230\u5bf9\u5e94\u7684\u6570\u636e\u3002\u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e9b\u8bf7\u6c42\u6700\u7ec8\u90fd\u843d\u5230\u4e86\u6570\u636e\u5e93\u4e0a\uff0c\u5bf9\u6570\u636e\u5e93\u9020\u6210\u4e86\u5de8\u5927\u7684\u538b\u529b\u3002<\/p>\n<h4>\u6709\u54ea\u4e9b\u89e3\u51b3\u529e\u6cd5\uff1f<\/h4>\n<p>\u6700\u57fa\u672c\u7684\u5c31\u662f\u9996\u5148\u505a\u597d\u53c2\u6570\u6821\u9a8c\uff0c\u4e00\u4e9b\u4e0d\u5408\u6cd5\u7684\u53c2\u6570\u8bf7\u6c42\u76f4\u63a5\u629b\u51fa\u5f02\u5e38\u4fe1\u606f\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002\u6bd4\u5982\u67e5\u8be2\u7684\u6570\u636e\u5e93 id \u4e0d\u80fd\u5c0f\u4e8e 0\u3001\u4f20\u5165\u7684\u90ae\u7bb1\u683c\u5f0f\u4e0d\u5bf9\u7684\u65f6\u5019\u76f4\u63a5\u8fd4\u56de\u9519\u8bef\u6d88\u606f\u7ed9\u5ba2\u6237\u7aef\u7b49\u7b49\u3002<\/p>\n<p><strong>1\uff09\u7f13\u5b58\u65e0\u6548 key<\/strong><\/p>\n<p>\u5982\u679c\u7f13\u5b58\u548c\u6570\u636e\u5e93\u90fd\u67e5\u4e0d\u5230\u67d0\u4e2a key \u7684\u6570\u636e\u5c31\u5199\u4e00\u4e2a\u5230 Redis \u4e2d\u53bb\u5e76\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u5177\u4f53\u547d\u4ee4\u5982\u4e0b\uff1a <code>SET key value EX 10086<\/code> \u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u89e3\u51b3\u8bf7\u6c42\u7684 key \u53d8\u5316\u4e0d\u9891\u7e41\u7684\u60c5\u51b5\uff0c\u5982\u679c\u9ed1\u5ba2\u6076\u610f\u653b\u51fb\uff0c\u6bcf\u6b21\u6784\u5efa\u4e0d\u540c\u7684\u8bf7\u6c42 key\uff0c\u4f1a\u5bfc\u81f4 Redis \u4e2d\u7f13\u5b58\u5927\u91cf\u65e0\u6548\u7684 key \u3002\u5f88\u660e\u663e\uff0c\u8fd9\u79cd\u65b9\u6848\u5e76\u4e0d\u80fd\u4ece\u6839\u672c\u4e0a\u89e3\u51b3\u6b64\u95ee\u9898\u3002\u5982\u679c\u975e\u8981\u7528\u8fd9\u79cd\u65b9\u5f0f\u6765\u89e3\u51b3\u7a7f\u900f\u95ee\u9898\u7684\u8bdd\uff0c\u5c3d\u91cf\u5c06\u65e0\u6548\u7684 key \u7684\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u77ed\u4e00\u70b9\u6bd4\u5982 1 \u5206\u949f\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u8fd9\u91cc\u591a\u8bf4\u4e00\u5634\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u6211\u4eec\u662f\u8fd9\u6837\u8bbe\u8ba1 key \u7684\uff1a <code>\u8868\u540d:\u5217\u540d:\u4e3b\u952e\u540d:\u4e3b\u952e\u503c<\/code> \u3002<\/p>\n<p>\u5982\u679c\u7528 Java \u4ee3\u7801\u5c55\u793a\u7684\u8bdd\uff0c\u5dee\u4e0d\u591a\u662f\u4e0b\u9762\u8fd9\u6837\u7684\uff1a<\/p>\n<pre><code class=\"java\">public Object getObjectInclNullById(Integer id) {\n    \/\/ \u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u6570\u636e\n    Object cacheValue = cache.get(id);\n    \/\/ \u7f13\u5b58\u4e3a\u7a7a\n    if (cacheValue == null) {\n        \/\/ \u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\n        Object storageValue = storage.get(key);\n        \/\/ \u7f13\u5b58\u7a7a\u5bf9\u8c61\n        cache.set(key, storageValue);\n        \/\/ \u5982\u679c\u5b58\u50a8\u6570\u636e\u4e3a\u7a7a\uff0c\u9700\u8981\u8bbe\u7f6e\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4(300\u79d2)\n        if (storageValue == null) {\n            \/\/ \u5fc5\u987b\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u5426\u5219\u6709\u88ab\u653b\u51fb\u7684\u98ce\u9669\n            cache.expire(key, 60 * 5);\n        }\n        return storageValue;\n    }\n    return cacheValue;\n}<\/code><\/pre>\n<p><strong>2\uff09\u5e03\u9686\u8fc7\u6ee4\u5668<\/strong><\/p>\n<p>\u5e03\u9686\u8fc7\u6ee4\u5668\u662f\u4e00\u4e2a\u975e\u5e38\u795e\u5947\u7684\u6570\u636e\u7ed3\u6784\uff0c\u901a\u8fc7\u5b83\u6211\u4eec\u53ef\u4ee5\u975e\u5e38\u65b9\u4fbf\u5730\u5224\u65ad\u4e00\u4e2a\u7ed9\u5b9a\u6570\u636e\u662f\u5426\u5b58\u5728\u4e8e\u6d77\u91cf\u6570\u636e\u4e2d\u3002\u6211\u4eec\u9700\u8981\u7684\u5c31\u662f\u5224\u65ad key \u662f\u5426\u5408\u6cd5\uff0c\u6709\u6ca1\u6709\u611f\u89c9\u5e03\u9686\u8fc7\u6ee4\u5668\u5c31\u662f\u6211\u4eec\u60f3\u8981\u627e\u7684\u90a3\u4e2a\u201c\u4eba\u201d\u3002<\/p>\n<p>\u5177\u4f53\u662f\u8fd9\u6837\u505a\u7684\uff1a\u628a\u6240\u6709\u53ef\u80fd\u5b58\u5728\u7684\u8bf7\u6c42\u7684\u503c\u90fd\u5b58\u653e\u5728\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\uff0c\u5f53\u7528\u6237\u8bf7\u6c42\u8fc7\u6765\uff0c\u5148\u5224\u65ad\u7528\u6237\u53d1\u6765\u7684\u8bf7\u6c42\u7684\u503c\u662f\u5426\u5b58\u5728\u4e8e\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\u3002\u4e0d\u5b58\u5728\u7684\u8bdd\uff0c\u76f4\u63a5\u8fd4\u56de\u8bf7\u6c42\u53c2\u6570\u9519\u8bef\u4fe1\u606f\u7ed9\u5ba2\u6237\u7aef\uff0c\u5b58\u5728\u7684\u8bdd\u624d\u4f1a\u8d70\u4e0b\u9762\u7684\u6d41\u7a0b\u3002<\/p>\n<p>\u52a0\u5165\u5e03\u9686\u8fc7\u6ee4\u5668\u4e4b\u540e\u7684\u7f13\u5b58\u5904\u7406\u6d41\u7a0b\u56fe\u5982\u4e0b\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302909\" alt=\"\u52a0\u5165\u5e03\u9686\u8fc7\u6ee4\u5668\u4e4b\u540e\u7684\u7f13\u5b58\u5904\u7406\u6d41\u7a0b\u56fe\" title=\"\u52a0\u5165\u5e03\u9686\u8fc7\u6ee4\u5668\u4e4b\u540e\u7684\u7f13\u5b58\u5904\u7406\u6d41\u7a0b\u56fe\" loading=\"lazy\"><\/p>\n<p>\u4f46\u662f\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u80fd\u4f1a\u5b58\u5728\u8bef\u5224\u7684\u60c5\u51b5\u3002\u603b\u7ed3\u6765\u8bf4\u5c31\u662f\uff1a <strong>\u5e03\u9686\u8fc7\u6ee4\u5668\u8bf4\u67d0\u4e2a\u5143\u7d20\u5b58\u5728\uff0c\u5c0f\u6982\u7387\u4f1a\u8bef\u5224\u3002\u5e03\u9686\u8fc7\u6ee4\u5668\u8bf4\u67d0\u4e2a\u5143\u7d20\u4e0d\u5728\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5143\u7d20\u4e00\u5b9a\u4e0d\u5728\u3002<\/strong><\/p>\n<p><em>\u4e3a\u4ec0\u4e48\u4f1a\u51fa\u73b0\u8bef\u5224\u7684\u60c5\u51b5\u5462? \u6211\u4eec\u8fd8\u8981\u4ece\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u539f\u7406\u6765\u8bf4\uff01<\/em><\/p>\n<p>\u6211\u4eec\u5148\u6765\u770b\u4e00\u4e0b\uff0c<strong>\u5f53\u4e00\u4e2a\u5143\u7d20\u52a0\u5165\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\u7684\u65f6\u5019\uff0c\u4f1a\u8fdb\u884c\u54ea\u4e9b\u64cd\u4f5c\uff1a<\/strong><\/p>\n<ol>\n<li>\u4f7f\u7528\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\u7684\u54c8\u5e0c\u51fd\u6570\u5bf9\u5143\u7d20\u503c\u8fdb\u884c\u8ba1\u7b97\uff0c\u5f97\u5230\u54c8\u5e0c\u503c\uff08\u6709\u51e0\u4e2a\u54c8\u5e0c\u51fd\u6570\u5f97\u5230\u51e0\u4e2a\u54c8\u5e0c\u503c\uff09\u3002<\/li>\n<li>\u6839\u636e\u5f97\u5230\u7684\u54c8\u5e0c\u503c\uff0c\u5728\u4f4d\u6570\u7ec4\u4e2d\u628a\u5bf9\u5e94\u4e0b\u6807\u7684\u503c\u7f6e\u4e3a 1\u3002<\/li>\n<\/ol>\n<p>\u6211\u4eec\u518d\u6765\u770b\u4e00\u4e0b\uff0c<strong>\u5f53\u6211\u4eec\u9700\u8981\u5224\u65ad\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u5b58\u5728\u4e8e\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u65f6\u5019\uff0c\u4f1a\u8fdb\u884c\u54ea\u4e9b\u64cd\u4f5c\uff1a<\/strong><\/p>\n<ol>\n<li>\u5bf9\u7ed9\u5b9a\u5143\u7d20\u518d\u6b21\u8fdb\u884c\u76f8\u540c\u7684\u54c8\u5e0c\u8ba1\u7b97\uff1b<\/li>\n<li>\u5f97\u5230\u503c\u4e4b\u540e\u5224\u65ad\u4f4d\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u662f\u5426\u90fd\u4e3a 1\uff0c\u5982\u679c\u503c\u90fd\u4e3a 1\uff0c\u90a3\u4e48\u8bf4\u660e\u8fd9\u4e2a\u503c\u5728\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\uff0c\u5982\u679c\u5b58\u5728\u4e00\u4e2a\u503c\u4e0d\u4e3a 1\uff0c\u8bf4\u660e\u8be5\u5143\u7d20\u4e0d\u5728\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\u3002<\/li>\n<\/ol>\n<p>\u7136\u540e\uff0c\u4e00\u5b9a\u4f1a\u51fa\u73b0\u8fd9\u6837\u4e00\u79cd\u60c5\u51b5\uff1a<strong>\u4e0d\u540c\u7684\u5b57\u7b26\u4e32\u53ef\u80fd\u54c8\u5e0c\u51fa\u6765\u7684\u4f4d\u7f6e\u76f8\u540c\u3002<\/strong> \uff08\u53ef\u4ee5\u9002\u5f53\u589e\u52a0\u4f4d\u6570\u7ec4\u5927\u5c0f\u6216\u8005\u8c03\u6574\u6211\u4eec\u7684\u54c8\u5e0c\u51fd\u6570\u6765\u964d\u4f4e\u6982\u7387\uff09<\/p>\n<p>\u66f4\u591a\u5173\u4e8e\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u5185\u5bb9\u53ef\u4ee5\u770b\u6211\u7684\u8fd9\u7bc7\u539f\u521b\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=5cwuDmoRco4vRzmbBPuIUg%3D%3D.9%2BzZvOxxDF4MShLyLFZBKkdNO3y6Uw%2FTUVCKxnjAYz2mgDW4Bj8amaeNj%2F%2FzRIhVfPe8hCpOsd4NW0NrCzIdqw%3D%3D\" rel=\"nofollow\">\u300a\u4e0d\u4e86\u89e3\u5e03\u9686\u8fc7\u6ee4\u5668\uff1f\u4e00\u6587\u7ed9\u4f60\u6574\u7684\u660e\u660e\u767d\u767d\uff01\u300b<\/a> \uff0c\u5f3a\u70c8\u63a8\u8350\uff0c\u4e2a\u4eba\u611f\u89c9\u7f51\u4e0a\u5e94\u8be5\u627e\u4e0d\u5230\u603b\u7ed3\u7684\u8fd9\u4e48\u660e\u660e\u767d\u767d\u7684\u6587\u7ae0\u4e86\u3002<\/p>\n<h3>\u7f13\u5b58\u51fb\u7a7f<\/h3>\n<h4>\u4ec0\u4e48\u662f\u7f13\u5b58\u51fb\u7a7f\uff1f<\/h4>\n<p>\u7f13\u5b58\u51fb\u7a7f\u4e2d\uff0c\u8bf7\u6c42\u7684 key \u5bf9\u5e94\u7684\u662f <strong>\u70ed\u70b9\u6570\u636e<\/strong> \uff0c\u8be5\u6570\u636e <strong>\u5b58\u5728\u4e8e\u6570\u636e\u5e93\u4e2d\uff0c\u4f46\u4e0d\u5b58\u5728\u4e8e\u7f13\u5b58\u4e2d\uff08\u901a\u5e38\u662f\u56e0\u4e3a\u7f13\u5b58\u4e2d\u7684\u90a3\u4efd\u6570\u636e\u5df2\u7ecf\u8fc7\u671f\uff09<\/strong> \u3002\u8fd9\u5c31\u53ef\u80fd\u4f1a\u5bfc\u81f4\u77ac\u65f6\u5927\u91cf\u7684\u8bf7\u6c42\u76f4\u63a5\u6253\u5230\u4e86\u6570\u636e\u5e93\u4e0a\uff0c\u5bf9\u6570\u636e\u5e93\u9020\u6210\u4e86\u5de8\u5927\u7684\u538b\u529b\uff0c\u53ef\u80fd\u76f4\u63a5\u5c31\u88ab\u8fd9\u4e48\u591a\u8bf7\u6c42\u5f04\u5b95\u673a\u4e86\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302910\" alt=\"\u7f13\u5b58\u51fb\u7a7f\" title=\"\u7f13\u5b58\u51fb\u7a7f\" loading=\"lazy\"><\/p>\n<p>\u4e3e\u4e2a\u4f8b\u5b50 \uff1a\u79d2\u6740\u8fdb\u884c\u8fc7\u7a0b\u4e2d\uff0c\u7f13\u5b58\u4e2d\u7684\u67d0\u4e2a\u79d2\u6740\u5546\u54c1\u7684\u6570\u636e\u7a81\u7136\u8fc7\u671f\uff0c\u8fd9\u5c31\u5bfc\u81f4\u77ac\u65f6\u5927\u91cf\u5bf9\u8be5\u5546\u54c1\u7684\u8bf7\u6c42\u76f4\u63a5\u843d\u5230\u6570\u636e\u5e93\u4e0a\uff0c\u5bf9\u6570\u636e\u5e93\u9020\u6210\u4e86\u5de8\u5927\u7684\u538b\u529b\u3002<\/p>\n<h4>\u6709\u54ea\u4e9b\u89e3\u51b3\u529e\u6cd5\uff1f<\/h4>\n<ul>\n<li>\u8bbe\u7f6e\u70ed\u70b9\u6570\u636e\u6c38\u4e0d\u8fc7\u671f\u6216\u8005\u8fc7\u671f\u65f6\u95f4\u6bd4\u8f83\u957f\u3002<\/li>\n<li>\u9488\u5bf9\u70ed\u70b9\u6570\u636e\u63d0\u524d\u9884\u70ed\uff0c\u5c06\u5176\u5b58\u5165\u7f13\u5b58\u4e2d\u5e76\u8bbe\u7f6e\u5408\u7406\u7684\u8fc7\u671f\u65f6\u95f4\u6bd4\u5982\u79d2\u6740\u573a\u666f\u4e0b\u7684\u6570\u636e\u5728\u79d2\u6740\u7ed3\u675f\u4e4b\u524d\u4e0d\u8fc7\u671f\u3002<\/li>\n<li>\u8bf7\u6c42\u6570\u636e\u5e93\u5199\u6570\u636e\u5230\u7f13\u5b58\u4e4b\u524d\uff0c\u5148\u83b7\u53d6\u4e92\u65a5\u9501\uff0c\u4fdd\u8bc1\u53ea\u6709\u4e00\u4e2a\u8bf7\u6c42\u4f1a\u843d\u5230\u6570\u636e\u5e93\u4e0a\uff0c\u51cf\u5c11\u6570\u636e\u5e93\u7684\u538b\u529b\u3002<\/li>\n<\/ul>\n<h4>\u7f13\u5b58\u7a7f\u900f\u548c\u7f13\u5b58\u51fb\u7a7f\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h4>\n<p>\u7f13\u5b58\u7a7f\u900f\u4e2d\uff0c\u8bf7\u6c42\u7684 key \u65e2\u4e0d\u5b58\u5728\u4e8e\u7f13\u5b58\u4e2d\uff0c\u4e5f\u4e0d\u5b58\u5728\u4e8e\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n<p>\u7f13\u5b58\u51fb\u7a7f\u4e2d\uff0c\u8bf7\u6c42\u7684 key \u5bf9\u5e94\u7684\u662f <strong>\u70ed\u70b9\u6570\u636e<\/strong> \uff0c\u8be5\u6570\u636e <strong>\u5b58\u5728\u4e8e\u6570\u636e\u5e93\u4e2d\uff0c\u4f46\u4e0d\u5b58\u5728\u4e8e\u7f13\u5b58\u4e2d\uff08\u901a\u5e38\u662f\u56e0\u4e3a\u7f13\u5b58\u4e2d\u7684\u90a3\u4efd\u6570\u636e\u5df2\u7ecf\u8fc7\u671f\uff09<\/strong> \u3002<\/p>\n<h3>\u7f13\u5b58\u96ea\u5d29<\/h3>\n<h4>\u4ec0\u4e48\u662f\u7f13\u5b58\u96ea\u5d29\uff1f<\/h4>\n<p>\u6211\u53d1\u73b0\u7f13\u5b58\u96ea\u5d29\u8fd9\u540d\u5b57\u8d77\u7684\u6709\u70b9\u610f\u601d\uff0c\u54c8\u54c8\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u7f13\u5b58\u96ea\u5d29\u63cf\u8ff0\u7684\u5c31\u662f\u8fd9\u6837\u4e00\u4e2a\u7b80\u5355\u7684\u573a\u666f\uff1a<strong>\u7f13\u5b58\u5728\u540c\u4e00\u65f6\u95f4\u5927\u9762\u79ef\u7684\u5931\u6548\uff0c\u5bfc\u81f4\u5927\u91cf\u7684\u8bf7\u6c42\u90fd\u76f4\u63a5\u843d\u5230\u4e86\u6570\u636e\u5e93\u4e0a\uff0c\u5bf9\u6570\u636e\u5e93\u9020\u6210\u4e86\u5de8\u5927\u7684\u538b\u529b\u3002<\/strong> \u8fd9\u5c31\u597d\u6bd4\u96ea\u5d29\u4e00\u6837\uff0c\u6467\u67af\u62c9\u673d\u4e4b\u52bf\uff0c\u6570\u636e\u5e93\u7684\u538b\u529b\u53ef\u60f3\u800c\u77e5\uff0c\u53ef\u80fd\u76f4\u63a5\u5c31\u88ab\u8fd9\u4e48\u591a\u8bf7\u6c42\u5f04\u5b95\u673a\u4e86\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u7f13\u5b58\u670d\u52a1\u5b95\u673a\u4e5f\u4f1a\u5bfc\u81f4\u7f13\u5b58\u96ea\u5d29\u73b0\u8c61\uff0c\u5bfc\u81f4\u6240\u6709\u7684\u8bf7\u6c42\u90fd\u843d\u5230\u4e86\u6570\u636e\u5e93\u4e0a\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043302911\" alt=\"\u7f13\u5b58\u96ea\u5d29\" title=\"\u7f13\u5b58\u96ea\u5d29\" loading=\"lazy\"><\/p>\n<p>\u4e3e\u4e2a\u4f8b\u5b50 \uff1a\u6570\u636e\u5e93\u4e2d\u7684\u5927\u91cf\u6570\u636e\u5728\u540c\u4e00\u65f6\u95f4\u8fc7\u671f\uff0c\u8fd9\u4e2a\u65f6\u5019\u7a81\u7136\u6709\u5927\u91cf\u7684\u8bf7\u6c42\u9700\u8981\u8bbf\u95ee\u8fd9\u4e9b\u8fc7\u671f\u7684\u6570\u636e\u3002\u8fd9\u5c31\u5bfc\u81f4\u5927\u91cf\u7684\u8bf7\u6c42\u76f4\u63a5\u843d\u5230\u6570\u636e\u5e93\u4e0a\uff0c\u5bf9\u6570\u636e\u5e93\u9020\u6210\u4e86\u5de8\u5927\u7684\u538b\u529b\u3002<\/p>\n<h4>\u6709\u54ea\u4e9b\u89e3\u51b3\u529e\u6cd5\uff1f<\/h4>\n<p><strong>\u9488\u5bf9 Redis \u670d\u52a1\u4e0d\u53ef\u7528\u7684\u60c5\u51b5\uff1a<\/strong><\/p>\n<ol>\n<li>\u91c7\u7528 Redis \u96c6\u7fa4\uff0c\u907f\u514d\u5355\u673a\u51fa\u73b0\u95ee\u9898\u6574\u4e2a\u7f13\u5b58\u670d\u52a1\u90fd\u6ca1\u529e\u6cd5\u4f7f\u7528\u3002<\/li>\n<li>\u9650\u6d41\uff0c\u907f\u514d\u540c\u65f6\u5904\u7406\u5927\u91cf\u7684\u8bf7\u6c42\u3002<\/li>\n<\/ol>\n<p><strong>\u9488\u5bf9\u70ed\u70b9\u7f13\u5b58\u5931\u6548\u7684\u60c5\u51b5\uff1a<\/strong><\/p>\n<ol>\n<li>\u8bbe\u7f6e\u4e0d\u540c\u7684\u5931\u6548\u65f6\u95f4\u6bd4\u5982\u968f\u673a\u8bbe\u7f6e\u7f13\u5b58\u7684\u5931\u6548\u65f6\u95f4\u3002<\/li>\n<li>\u7f13\u5b58\u6c38\u4e0d\u5931\u6548\uff08\u4e0d\u592a\u63a8\u8350\uff0c\u5b9e\u7528\u6027\u592a\u5dee\uff09\u3002<\/li>\n<li>\u8bbe\u7f6e\u4e8c\u7ea7\u7f13\u5b58\u3002<\/li>\n<\/ol>\n<h4>\u7f13\u5b58\u96ea\u5d29\u548c\u7f13\u5b58\u51fb\u7a7f\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h4>\n<p>\u7f13\u5b58\u96ea\u5d29\u548c\u7f13\u5b58\u51fb\u7a7f\u6bd4\u8f83\u50cf\uff0c\u4f46\u7f13\u5b58\u96ea\u5d29\u5bfc\u81f4\u7684\u539f\u56e0\u662f\u7f13\u5b58\u4e2d\u7684\u5927\u91cf\u6216\u8005\u6240\u6709\u6570\u636e\u5931\u6548\uff0c\u7f13\u5b58\u51fb\u7a7f\u5bfc\u81f4\u7684\u539f\u56e0\u4e3b\u8981\u662f\u67d0\u4e2a\u70ed\u70b9\u6570\u636e\u4e0d\u5b58\u5728\u4e0e\u7f13\u5b58\u4e2d\uff08\u901a\u5e38\u662f\u56e0\u4e3a\u7f13\u5b58\u4e2d\u7684\u90a3\u4efd\u6570\u636e\u5df2\u7ecf\u8fc7\u671f\uff09\u3002<\/p>\n<h3>\u5982\u4f55\u4fdd\u8bc1\u7f13\u5b58\u548c\u6570\u636e\u5e93\u6570\u636e\u7684\u4e00\u81f4\u6027\uff1f<\/h3>\n<p>\u7ec6\u8bf4\u7684\u8bdd\u53ef\u4ee5\u626f\u5f88\u591a\uff0c\u4f46\u662f\u6211\u89c9\u5f97\u5176\u5b9e\u6ca1\u592a\u5927\u5fc5\u8981\uff08\u5c0f\u58f0 BB\uff1a\u5f88\u591a\u89e3\u51b3\u65b9\u6848\u6211\u4e5f\u6ca1\u592a\u5f04\u660e\u767d\uff09\u3002\u6211\u4e2a\u4eba\u89c9\u5f97\u5f15\u5165\u7f13\u5b58\u4e4b\u540e\uff0c\u5982\u679c\u4e3a\u4e86\u77ed\u65f6\u95f4\u7684\u4e0d\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u9009\u62e9\u8ba9\u7cfb\u7edf\u8bbe\u8ba1\u53d8\u5f97\u66f4\u52a0\u590d\u6742\u7684\u8bdd\uff0c\u5b8c\u5168\u6ca1\u5fc5\u8981\u3002<\/p>\n<p>\u4e0b\u9762\u5355\u72ec\u5bf9 <strong>Cache Aside Pattern\uff08\u65c1\u8def\u7f13\u5b58\u6a21\u5f0f\uff09<\/strong> \u6765\u804a\u804a\u3002<\/p>\n<p>Cache Aside Pattern \u4e2d\u9047\u5230\u5199\u8bf7\u6c42\u662f\u8fd9\u6837\u7684\uff1a\u66f4\u65b0 DB\uff0c\u7136\u540e\u76f4\u63a5\u5220\u9664 cache \u3002<\/p>\n<p>\u5982\u679c\u66f4\u65b0\u6570\u636e\u5e93\u6210\u529f\uff0c\u800c\u5220\u9664\u7f13\u5b58\u8fd9\u4e00\u6b65\u5931\u8d25\u7684\u60c5\u51b5\u7684\u8bdd\uff0c\u7b80\u5355\u8bf4\u4e24\u4e2a\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<ol>\n<li><strong>\u7f13\u5b58\u5931\u6548\u65f6\u95f4\u53d8\u77ed\uff08\u4e0d\u63a8\u8350\uff0c\u6cbb\u6807\u4e0d\u6cbb\u672c\uff09<\/strong> \uff1a\u6211\u4eec\u8ba9\u7f13\u5b58\u6570\u636e\u7684\u8fc7\u671f\u65f6\u95f4\u53d8\u77ed\uff0c\u8fd9\u6837\u7684\u8bdd\u7f13\u5b58\u5c31\u4f1a\u4ece\u6570\u636e\u5e93\u4e2d\u52a0\u8f7d\u6570\u636e\u3002\u53e6\u5916\uff0c\u8fd9\u79cd\u89e3\u51b3\u529e\u6cd5\u5bf9\u4e8e\u5148\u64cd\u4f5c\u7f13\u5b58\u540e\u64cd\u4f5c\u6570\u636e\u5e93\u7684\u573a\u666f\u4e0d\u9002\u7528\u3002<\/li>\n<li><strong>\u589e\u52a0 cache \u66f4\u65b0\u91cd\u8bd5\u673a\u5236\uff08\u5e38\u7528\uff09<\/strong>\uff1a \u5982\u679c cache \u670d\u52a1\u5f53\u524d\u4e0d\u53ef\u7528\u5bfc\u81f4\u7f13\u5b58\u5220\u9664\u5931\u8d25\u7684\u8bdd\uff0c\u6211\u4eec\u5c31\u9694\u4e00\u6bb5\u65f6\u95f4\u8fdb\u884c\u91cd\u8bd5\uff0c\u91cd\u8bd5\u6b21\u6570\u53ef\u4ee5\u81ea\u5df1\u5b9a\u3002\u5982\u679c\u591a\u6b21\u91cd\u8bd5\u8fd8\u662f\u5931\u8d25\u7684\u8bdd\uff0c\u6211\u4eec\u53ef\u4ee5\u628a\u5f53\u524d\u66f4\u65b0\u5931\u8d25\u7684 key \u5b58\u5165\u961f\u5217\u4e2d\uff0c\u7b49\u7f13\u5b58\u670d\u52a1\u53ef\u7528\u4e4b\u540e\uff0c\u518d\u5c06\u7f13\u5b58\u4e2d\u5bf9\u5e94\u7684 key \u5220\u9664\u5373\u53ef\u3002<\/li>\n<\/ol>\n<p>\u76f8\u5173\u6587\u7ae0\u63a8\u8350\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=2hpm9MfIEDfGXYWyZRW%2BVg%3D%3D.fjnW6DZjZKVAtsi8PczK8AxBC5lpSfDwl%2BGEM%2BkUCbaUrrxv2WQlsTPhUdupqAWfeejfxJ7%2B6dKHQ2TguK8dzJoKC9ujQ5iURBt0U1BLJ%2BzdC%2B0g%2BgrMtB0lPs%2FEPWzyTiUhtIEwDzZq8w26CA3bXEPSxClQbGyoctDkfMj6NXHJKNQPMzU19nzcveBKsxsI6w6VwefVF143TQLc80778Hesc5pyhi6DTmnk9ZSJ2Zg93BUMPDTtAEdc6yylBM8SHlJqrlYKK7a9HCupQUkxdmoXJqcLEt7jPQGmngJqr%2BtLTFN2W23wGAF8etRk40QK\" rel=\"nofollow\">\u7f13\u5b58\u548c\u6570\u636e\u5e93\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u770b\u8fd9\u7bc7\u5c31\u591f\u4e86 &#8211; \u6c34\u6ef4\u4e0e\u94f6\u5f39<\/a><\/p>\n<h2>Redis \u96c6\u7fa4<\/h2>\n<p><strong>Redis Sentinel<\/strong> \uff1a<\/p>\n<ol>\n<li>\u4ec0\u4e48\u662f Sentinel\uff1f \u6709\u4ec0\u4e48\u7528\uff1f<\/li>\n<li>Sentinel \u5982\u4f55\u68c0\u6d4b\u8282\u70b9\u662f\u5426\u4e0b\u7ebf\uff1f\u4e3b\u89c2\u4e0b\u7ebf\u4e0e\u5ba2\u89c2\u4e0b\u7ebf\u7684\u533a\u522b?<\/li>\n<li>Sentinel \u662f\u5982\u4f55\u5b9e\u73b0\u6545\u969c\u8f6c\u79fb\u7684\uff1f<\/li>\n<li>\u4e3a\u4ec0\u4e48\u5efa\u8bae\u90e8\u7f72\u591a\u4e2a sentinel \u8282\u70b9\uff08\u54e8\u5175\u96c6\u7fa4\uff09\uff1f<\/li>\n<li>Sentinel \u5982\u4f55\u9009\u62e9\u51fa\u65b0\u7684 master\uff08\u9009\u4e3e\u673a\u5236\uff09?<\/li>\n<li>\u5982\u4f55\u4ece Sentinel \u96c6\u7fa4\u4e2d\u9009\u62e9\u51fa Leader \uff1f<\/li>\n<li>Sentinel \u53ef\u4ee5\u9632\u6b62\u8111\u88c2\u5417\uff1f<\/li>\n<\/ol>\n<p><strong>Redis Cluster<\/strong> \uff1a<\/p>\n<ol>\n<li>\u4e3a\u4ec0\u4e48\u9700\u8981 Redis Cluster\uff1f\u89e3\u51b3\u4e86\u4ec0\u4e48\u95ee\u9898\uff1f\u6709\u4ec0\u4e48\u4f18\u52bf\uff1f<\/li>\n<li>Redis Cluster \u662f\u5982\u4f55\u5206\u7247\u7684\uff1f<\/li>\n<li>\u4e3a\u4ec0\u4e48 Redis Cluster \u7684\u54c8\u5e0c\u69fd\u662f 16384 \u4e2a?<\/li>\n<li>\u5982\u4f55\u786e\u5b9a\u7ed9\u5b9a key \u7684\u5e94\u8be5\u5206\u5e03\u5230\u54ea\u4e2a\u54c8\u5e0c\u69fd\u4e2d\uff1f<\/li>\n<li>Redis Cluster \u652f\u6301\u91cd\u65b0\u5206\u914d\u54c8\u5e0c\u69fd\u5417\uff1f<\/li>\n<li>Redis Cluster \u6269\u5bb9\u7f29\u5bb9\u671f\u95f4\u53ef\u4ee5\u63d0\u4f9b\u670d\u52a1\u5417\uff1f<\/li>\n<li>Redis Cluster \u4e2d\u7684\u8282\u70b9\u662f\u600e\u4e48\u8fdb\u884c\u901a\u4fe1\u7684\uff1f<\/li>\n<\/ol>\n<p><strong>\u53c2\u8003\u7b54\u6848<\/strong> \uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=qknyA5FTmNozM4y1%2B0ozrg%3D%3D.nUQLN%2FMRsmi3eSezGWzNd%2FmEUPsmUqzwvlK3BgMcret5vujsJJFrPq%2BIMIEPFxARf8TR9AgiFos2UpA4Szfdmw%3D%3D\" rel=\"nofollow\">Redis \u96c6\u7fa4\u8be6\u89e3\uff08\u4ed8\u8d39\uff09<\/a>\u3002<\/p>\n<h2>\u53c2\u8003<\/h2>\n<ul>\n<li>\u300aRedis \u5f00\u53d1\u4e0e\u8fd0\u7ef4\u300b<\/li>\n<li>\u300aRedis \u8bbe\u8ba1\u4e0e\u5b9e\u73b0\u300b<\/li>\n<li>Redis \u547d\u4ee4\u624b\u518c\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=4JDquyfVu6g3gliuYcwcJg%3D%3D.Ergs3AkWLhB5zHoq3Z22KF%2BcVS0Gh4t%2F58cAdH4nxthI9m3AZeFbL09zBkVpHVSt\" rel=\"nofollow\">https:\/\/www.redis.com.cn\/comm&#8230;<\/a><\/li>\n<li>WHY Redis choose single thread (vs multi threads): <a href=\"https:\/\/link.segmentfault.com\/?enc=Zq9fCMO5vIRk8Sne3YCNjQ%3D%3D.nf%2BDhbSCgO42yly9GXm2yEdnotGzaM70idFlTTqzzUMRz390epRNKCE5I4ikcQMoSJjp7SRlTF3KxQcJ%2FOkvAynnbFM748ze4VcmAnow9pyb%2BLPQJGLsT1oIocw5uMYR\" rel=\"nofollow\">https:\/\/medium.com\/@jychen7\/sharing-redis-single-thread-vs-multi-threads-5870bd44d153<\/a><\/li>\n<li>The difference between AOF and RDB persistence\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=vFwq2zujNOvIulEOnr83Kg%3D%3D.RV3k0y%2F1Pl7qgnm1BW4yM8odeDzs9v7pk7EkH2XwIL6zAfPfuvg5d0Peh1DJLklcEZSVI0GMykhvabnpYbaXJA%3D%3D\" rel=\"nofollow\">https:\/\/www.sobyte.net\/post\/2&#8230;<\/a><\/li>\n<\/ul>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000043302892\">https:\/\/segmentfault.com\/a\/1190000043302892<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ee5\u4e0b\u5185\u5bb9\u6765\u6e90\u4e8e\u4e8e\u6211\u5f00\u6e90\u7684 JavaGuide \uff08Java\u5b66\u4e60&#038;&#038;\u9762\u8bd5\u6307\u5357\uff0cGithub 1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10007068","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10007068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10007068"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10007068\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10007068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10007068"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10007068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}