{"id":201395,"date":"2025-05-10T08:53:43","date_gmt":"2025-05-10T00:53:43","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201395\/"},"modified":"2025-05-10T08:53:43","modified_gmt":"2025-05-10T00:53:43","slug":"%e6%96%b0%e6%b5%aa%e5%be%ae%e5%8d%9a%e5%85%b3%e7%b3%bb%e6%9c%8d%e5%8a%a1%e4%b8%8eredis%e7%9a%84%e6%95%85%e4%ba%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201395\/","title":{"rendered":"\u65b0\u6d6a\u5fae\u535a\u5173\u7cfb\u670d\u52a1\u4e0eRedis\u7684\u6545\u4e8b"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u65b0\u6d6a\u5fae\u535a\u5173\u7cfb\u670d\u52a1\u4e0eRedis\u7684\u6545\u4e8b<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300a\u65b0\u6d6a\u5fae\u535a\u5173\u7cfb\u670d\u52a1\u4e0eRedis\u7684\u6545\u4e8b\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<p>\u65b0\u6d6a\u5fae\u535a\u7684\u5de5\u7a0b\u5e08\u4eec\u66fe\u7ecf\u5728\u591a\u4e2a\u516c\u5f00\u573a\u5408\u90fd\u8bb2\u5230\u8fc7\uff0c\u5fae\u535a\u5e73\u53f0\u5f53\u524d\u5728\u4f7f\u7528\u5e76\u7ef4\u62a4\u7740\u53ef\u80fd\u662f\u4e16\u754c\u4e0a***\u7684Redis\u96c6\u7fa4\uff0c\u5176\u4e2d***\u7684\u4e00\u4e2a\u4e1a\u52a1\uff0c\u5355\u4e2a\u4e1a\u52a1\u4f7f\u7528\u4e86\u8d85\u8fc7 10T \u7684\u5185\u5b58\uff0c\u8fd9\u91cc\u8bf4\u7684\u5c31\u662f\u5fae\u535a\u5173\u7cfb\u670d\u52a1\u3002<\/p>\n<p><strong>\u98ce\u8d77<\/strong><\/p>\n<p>2009\u5e74\u5fae\u535a\u521a\u521a\u4e0a\u7ebf\u7684\u65f6\u5019\uff0c\u5fae\u535a\u5173\u7cfb\u670d\u52a1\u4f7f\u7528\u7684\u662f\u6700\u4f20\u7edf\u7684 Memcache+Mysql \u7684\u65b9\u6848\u3002Mysql \u6309 uid hash \u8fdb\u884c\u4e86\u5206\u5e93\u5206\u8868\uff0c\u8868\u7ed3\u6784\u975e\u5e38\u7b80\u5355\uff1a<\/p>\n<\/p>\n<p>\u4e1a\u52a1\u65b9\u5b58\u5728\u4e24\u79cd\u67e5\u8be2\uff1a<\/p>\n<ul>\n<li>\u67e5\u8be2\u7528\u6237\u7684\u5173\u6ce8\u5217\u8868\uff1aselect touid from table where fromuid=\uff1forder by addTime desc<\/li>\n<li>\u67e5\u8be2\u7528\u6237\u7684\u7c89\u4e1d\u5217\u8868\uff1aselect fromuid from table where touid=\uff1forder by addTime desc<\/li>\n<\/ul>\n<p>\u4e24\u79cd\u67e5\u8be2\u7684\u4e1a\u52a1\u9700\u6c42\u4e0e\u5206\u5e93\u5206\u8868\u7684\u67b6\u6784\u8bbe\u8ba1\u5b58\u5728\u77db\u76fe\uff0c\u6700\u7ec8\u5bfc\u81f4\u4e86\u5197\u4f59\u5b58\u50a8\uff1a\u4ee5 fromuid \u4e3ahash key\u5b58\u4e00\u4efd\uff0c\u4ee5 touid \u4e3ahash key\u518d\u5b58\u4e00\u4efd\u3002memcache key \u4e3a fromuid.suffix \uff0c\u4f7f\u7528\u4e0d\u540c\u7684 suffix \u6765\u533a\u5206\u662f\u5173\u6ce8\u5217\u8868\u8fd8\u662f\u7c89\u4e1d\u5217\u8868\uff0ccache value \u5219\u4e3a PHP Serialize \u540e\u7684 Array\u3002\u540e\u6765\u4e3a\u4e86\u4f18\u5316\u6027\u80fd\uff0c\u5c06 value \u6362\u6210\u4e86\u81ea\u5df1\u62fc\u88c5\u7684 byte \u6570\u7ec4\u3002<\/p>\n<p><strong>\u4e91\u6d8c<\/strong><\/p>\n<p>2011\u5e74\u5fae\u535a\u8fdb\u884c\u5e73\u53f0\u5316\u6539\u9020\u8fc7\u7a0b\u4e2d\uff0c\u4e1a\u52a1\u63d0\u51fa\u4e86\u65b0\u7684\u9700\u6c42\uff1a\u5728\u6838\u5fc3\u63a5\u53e3\u4e2d\u589e\u52a0\u4e86\u201c\u5224\u65ad\u4e24\u4e2a\u7528\u6237\u7684\u5173\u7cfb\u201d\u7684\u6b65\u9aa4\uff0c\u5e76\u589e\u52a0\u4e86\u201c\u53cc\u5411\u5173\u6ce8\u201d\u7684\u6982\u5ff5\u3002\u56e0\u6b64\u4e24\u4e2a\u7528\u6237\u7684\u5173\u7cfb\u5b58\u5728\u56db\u79cd\u72b6\u6001\uff1a\u5173\u6ce8\uff0c\u7c89\u4e1d\uff0c\u53cc\u5411\u5173\u6ce8\u548c\u65e0\u4efb\u4f55\u5173\u7cfb\u3002\u4e3a\u4e86\u9ad8\u6548\u7684\u5b9e\u73b0\u8fd9\u4e2a\u9700\u6c42\uff0c\u5e73\u53f0\u5f15\u5165\u4e86 Redis \u6765\u5b58\u50a8\u5173\u7cfb\u3002\u5e73\u53f0\u4f7f\u7528 Redis \u7684 hash \u6765\u5b58\u50a8\u5173\u7cfb\uff1akey \u4f9d\u7136\u662f uid.suffix\uff0c\u5173\u6ce8\u5217\u8868\uff0c\u7c89\u4e1d\u5217\u8868\u53ca\u53cc\u5411\u5173\u6ce8\u5217\u8868\u5404\u81ea\u6709\u4e00\u4e2a\u4e0d\u540c\u7684 suffix\uff0cvalue \u662f\u4e00\u4e2ahash\uff0cfield \u662f touid\uff0cvalue \u662f addTime\u3002order by addTime \u7684\u529f\u80fd\u5219\u7531 Service \u5185\u90e8 sort \u5b9e\u73b0\u3002\u90e8\u5206\u5927V\u7684\u7c89\u4e1d\u5217\u8868\u53ef\u80fd\u5f88\u957f\uff0c\u4e0e\u4ea7\u54c1\u4eba\u5458\u7684\u6c9f\u901a\u534f\u5546\u540e\uff0c\u5c06\u5b58\u50a8\u9650\u5b9a\u4e3a\u201c***\u76845000\u4e2a\u7c89\u4e1d\u5217\u8868\u201d\u3002<\/p>\n<\/p>\n<p>\u5fae\u535a\u5173\u7cfb\u5b58\u50a8Redis\u7ed3\u6784<\/p>\n<p>\u9700\u6c42\u5b9e\u73b0\uff1a<\/p>\n<ul>\n<li>\u67e5\u8be2\u7528\u6237\u5173\u6ce8\u5217\u8868\uff1ahgetAll uid.following \uff0cthen sort<\/li>\n<li>\u67e5\u8be2\u7528\u6237\u7c89\u4e1d\u5217\u8868\uff1ahgetAll uid.follower\uff0cthen sort<\/li>\n<li>\u67e5\u8be2\u7528\u6237\u53cc\u5411\u5173\u6ce8\u5217\u8868\uff1ahgetAll uid.bifollow\uff0cthen sort<\/li>\n<li>\u5224\u65ad\u4e24\u4e2a\u7528\u6237\u5173\u7cfb\uff1ahget uidA.following uidB &amp;&amp; hget uidB.following uidA<\/li>\n<\/ul>\n<p>\u540e\u6765\u53c8\u589e\u52a0\u4e86\u51e0\u4e2a\u66f4\u590d\u6742\u7684\u9700\u6c42\uff1a\u201c\u6211\u4e0e\u4ed6\u7684\u5171\u540c\u5173\u6ce8\u5217\u8868\u201d\u3001\u201c\u6211\u5173\u6ce8\u7684\u4eba\u91cc\u8c01\u5173\u6ce8\u4e86\u4ed6\u201d\u7b49\u7b49\uff0c\u5c31\u4e0d\u5c55\u5f00\u6765\u8bb2\u4e86\u3002<\/p>\n<p>\u5e73\u53f0\u5728\u521a\u5f15\u5165 Redis \u7684\u4e00\u6bb5\u65f6\u95f4\u91cc\u8e29\u4e86\u4e0d\u5c11\u5751\uff0c\u4e3e\u51e0\u4e2a\u4f8b\u5b50\uff1a<\/p>\n<p>1\u3001\u8fd0\u7ef4\u5de5\u5177\u548c\u6d41\u7a0b\u4ece\u96f6\u5f00\u59cb\u505a\uff0c\u8fd0\u7ef4\u6210\u719f\u7684\u901f\u5ea6\u8d76\u4e0d\u4e0a\u4e1a\u52a1\u589e\u957f\u7684\u901f\u5ea6\uff1a\u5728\u8fd8\u6ca1\u6765\u5f97\u53ca\u5b89\u6392\u6027\u80fd\u8c03\u4f18\u7684\u5de5\u4f5c\uff0cfd \u5df2\u7ecf\u8fbe\u5230\u9ed8\u8ba4\u914d\u7f6e\u7684\u4e0a\u9650\u4e86\uff0c***\u6211\u4eec\u53ea\u80fd\u8d81\u51cc\u6668\u4e1a\u52a1\u4f4e\u5cf0\u671f\u91cd\u542f Redis \u96c6\u7fa4\uff0c\u4ee5\u4fbf\u8bbe\u7f6e\u65b0\u7684 ulimit \u53c2\u6570\uff1b<\/p>\n<p>2\u3001\u5e73\u53f0\u6700\u5f00\u59cb\u4f7f\u7528\u7684 Redis \u7248\u672c\u662f 2.0\uff0c\u56e0\u4e3a Redis \u4ee3\u7801\u8db3\u591f\u7b80\u5355\uff0c\u4ece\u5f15\u5165\u5230\u5fae\u535a\u8d77\uff0c\u6211\u4eec\u5c31\u5f00\u59cb\u5bf9\u5176\u8fdb\u884c\u4e86\u5b9a\u5236\u5316\u5f00\u53d1\uff0c\u4ece\u4e3b\u4ece\u590d\u5236\uff0c\u5230\u5199\u78c1\u76d8\u9650\u901f\uff0c\u518d\u5230\u5185\u5b58\u7ba1\u7406\uff0c\u90fd\u8fdb\u884c\u4e86\u5b9a\u5236\u3002\u5bfc\u81f4\u7684\u7ed3\u679c\u662f\uff0c\u6709\u4e00\u6bb5\u65f6\u95f4\uff0c\u5fae\u535a\u7684\u7ebf\u4e0a\u5b58\u5728\u8d85\u8fc75\u79cd\u4e0d\u540c\u7684 Redis \u4fee\u6539\u7248\uff0c\u5bf9\u4e8e\u8fd0\u7ef4\uff0cbugfix\uff0c\u5347\u7ea7\u90fd\u5e26\u6765\u4e86\u5de8\u5927\u7684\u9ebb\u70e6\u3002\u540e\u6765\u7531\u7530\u98ce\u519b @\u679c\u7238\u679c\u7238 \u4e3a\u5185\u90e8 Redis \u7248\u672c\u63d0\u4f9b\u4e86\u4e0d\u505c\u673a\u5347\u7ea7\u529f\u80fd\u540e\uff0c\u624d\u6162\u6162\u597d\u8f6c\u3002<\/p>\n<p>3\u3001\u5e73\u53f0\u6709\u4e00\u4e2a\u4e1a\u52a1\u66fe\u7ecf\u4f7f\u7528\u4e86\u975e\u9ed8\u8ba4 db \uff0c\u540e\u6765\u8d39\u4e86\u597d\u5927\u529b\u6c14\u53bb\u505a\u8fc1\u79fb<\/p>\n<p>4\u3001\u5e73\u53f0\u8fd8\u6709\u4e00\u4e2a\u4e1a\u52a1\u9700\u8981\u5b9a\u671f\u5bf9\u6570\u636e\u8fdb\u884c flush db \uff0c\u4ee5\u817e\u51fa\u7a7a\u95f4\u5b58\u50a8***\u6570\u636e\u3002\u4e3a\u4e86\u907f\u514d\u5728 flush db \u9636\u6bb5\u5f71\u54cd\u7ebf\u4e0a\u4e1a\u52a1\uff0c\u6211\u4eec\u4ece client \u5230 server \u90fd\u505a\u4e86\u5927\u91cf\u7684\u4fee\u6539\u3002<\/p>\n<p>5\u3001\u5e73\u53f0\u6bcf\u5e74\u957f\u5047\u524d\u90fd\u4f1a\u505a\u4e00\u4e9b\u7ebf\u4e0a\u4e1a\u52a1\u6392\u67e5\uff0c\u548c\u6545\u969c\u6a21\u62df\uff082013\u5e74\u751a\u81f3\u505a\u4e86\u4e00\u4e2a\u540d\u53eb Touchstone \u7684\u5bb9\u707e\u538b\u6d4b\u7cfb\u7edf\uff09\u30022011\u5e74\u5341\u4e00\u5047\u524d\uff0c\u6211\u4eec\u7528 iptables \u5c06 Redis \u7aef\u53e3\u7684\u6240\u6709\u5305\u90fd drop \u6389\uff0c\u7ed3\u679c client \u7aef\u7b49\u4e86 120 \u79d2\u624d\u8fd4\u56de\u3002\u4e8e\u662f\u6211\u4eec\u5728\u653e\u5047\u524d\u71ac\u591c\u52a0\u73ed\u7ed9 client \u6dfb\u52a0\u8d85\u65f6\u68c0\u6d4b\u529f\u80fd\uff0c\u4f46\u771f\u6b63\u4e0a\u7ebf\u8fd8\u662f\u7b49\u5230\u4e86\u5047\u671f\u56de\u6765\u540e\u3002<\/p>\n<p><strong>\u7834\u8327<\/strong><\/p>\n<p>\u5bf9\u4e8e\u5fae\u535a\u5173\u7cfb\u670d\u52a1\uff0c***\u7684\u6311\u6218\u8fd8\u662f\u5bb9\u91cf\u548c\u8bbf\u95ee\u91cf\u7684\u5feb\u901f\u589e\u957f\uff0c\u8fd9\u7ed9\u6211\u4eec\u7684 Redis \u65b9\u6848\u5e26\u6765\u4e86\u4e0d\u5c11\u7684\u9ebb\u70e6\uff1a<\/p>\n<p>***\u4e2a\u78b0\u5230\u7684\u9ebb\u70e6\u662f Redis \u7684 hgetAll \u5728 hash size \u8f83\u5927\u7684\u573a\u666f\u4e0b\u6162\u8bf7\u6c42\u6bd4\u4f8b\u8f83\u9ad8\u3002\u6211\u4eec\u8c03\u6574\u4e86 hash-max-zip-size\uff0c\u8282\u7ea6\u4e861\/3\u7684\u5185\u5b58\uff0c\u4f46\u5bf9\u4e1a\u52a1\u6574\u4f53\u6027\u80fd\u7684\u63d0\u5347\u6709\u9650\u3002***\uff0c\u6211\u4eec\u4e0d\u5f97\u4e0d\u5728 Redis \u524d\u9762\u53c8\u6321\u4e86\u4e00\u5c42 memcache\uff0c\u7528\u6765\u6297 hgetAll \u8bfb\u7684\u95ee\u9898\u3002<\/p>\n<p>\u7b2c\u4e8c\u4e2a\u9ebb\u70e6\u662f\u65b0\u4e0a\u7684\u9700\u6c42\uff1a\u201c\u6211\u5173\u6ce8\u7684\u4eba\u91cc\u8c01\u5173\u6ce8\u4e86\u4ed6\u201d\uff0c\u7531\u4e8e\u7528\u6237\u7684\u7c89\u4e1d\u5217\u8868\u53ef\u80fd\u4e0d\u5168\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5c31\u4e0d\u80fd\u7528\u5173\u6ce8\u5217\u8868\u4e0e\u7c89\u4e1d\u5217\u8868\u6c42\u4ea4\u96c6\u7684\u65b9\u5f0f\u6765\u8ba1\u7b97\u7ed3\u679c\uff0c\u53ea\u80fd\u964d\u7ea7\u5230\u9700\u6c42\u7684\u5b57\u9762\u63cf\u8ff0\u6b65\u9aa4\uff1a\u53d6\u6211\u7684\u5173\u6ce8\u4eba\u5217\u8868\uff0c\u7136\u540e\u9010\u4e2a\u5224\u65ad\u8fd9\u4e9b\u4eba\u91cc\u8c01\u5173\u6ce8\u4e86\u4ed6\u3002client \u7aef\u5206\u6279\u5e76\u884c\u53d1\u8d77\u8bf7\u6c42\uff0c\u8fd8\u597d Redis \u7684\u5355\u4e2a\u5173\u7cfb\u5224\u65ad\u975e\u5e38\u5feb\u3002<\/p>\n<p>\u7b2c\u4e09\u4e2a\u9ebb\u70e6\uff0c\u4e5f\u662f***\u7684\u9ebb\u70e6\uff0c\u5c31\u662f\u5bb9\u91cf\u589e\u957f\u7684\u95ee\u9898\u4e86\u3002\u6700\u521d\u7684\u8bbe\u8ba1\u65b9\u6848\uff0c\u6309 uid hash \u6210 16 \u4e2a\u7aef\u53e3\uff0c\u6bcf\u53f0 64G \u5185\u5b58\u7684\u673a\u5668\u4e0a\u90e8\u7f72 2 \u4e2a\u7aef\u53e3\uff0c\u6bcf\u4e2a\u4e1a\u52a1 IDC \u673a\u623f\u90e8\u7f72\u4e00\u5957\u3002\u540e\u6765\uff0c\u6bcf\u53f0\u673a\u5668\u4e0a\u5c31\u53ea\u90e8\u7f72\u4e00\u4e2a\u7aef\u53e3\u4e86\u3002\u518d\u540e\u6765\uff0c128G \u5185\u5b58\u7684\u673a\u5668\u8fd8\u6ca1\u6709\u8fdb\u5165\u516c\u53f8\u91c7\u8d2d\u76ee\u5f55\uff0c64G \u5185\u5b58\u5c31\u5373\u5c06 OOM \u4e86\uff0c\u6240\u4ee5\u6211\u4eec\u4e0d\u5f97\u4e0d\u505a\u4e86\u4e00\u6b21\u7aef\u53e3\u6269\u5bb9\uff1a16\u7aef\u53e3\u62c664\u7aef\u53e3\uff0c\u4f9d\u7136\u662f\u6bcf\u53f0 64G \u5185\u5b58\u673a\u5668\u4e0a\u90e8\u7f72 2 \u4e2a\u7aef\u53e3\u3002\u518d\u540e\u6765\uff0c\u53c8\u53ea\u90e8\u7f72\u4e00\u4e2a\u7aef\u53e3\u3002\u518d\u540e\u6765\uff0c\u5347\u7ea7\u5230 128G \u5185\u5b58\u673a\u5668\u3002\u518d\u540e\u6765\uff0c128G \u673a\u5668\u4e0a\u51fa\u73b0 OOM \u4e86\uff01\u73b0\u5728\u600e\u4e48\u529e\uff1f<\/p>\n<p><strong>\u5316\u8776<\/strong><\/p>\n<p>\u4e3a\u4e86\u4ece\u6839\u672c\u4e0a\u89e3\u51b3\u5bb9\u91cf\u7684\u95ee\u9898\uff0c\u6211\u4eec\u5f00\u59cb\u5bfb\u627e\u4e00\u79cd\u672c\u8d28\u7684\u89e3\u51b3\u65b9\u6848\u3002\u6700\u521d\u9009\u62e9\u5f15\u5165 Redis \u4f5c\u4e3a\u4e00\u4e2a storage\uff0c\u662f\u56e0\u4e3a\u7528\u6237\u5173\u7cfb\u5224\u65ad\u529f\u80fd\u8bf7\u6c42\u7684\u6570\u636e\u70ed\u70b9\u4e0d\u662f\u5f88\u96c6\u4e2d\uff0c\u957f\u5c3e\u6548\u679c\u660e\u663e\uff0ccache miss \u53ef\u80fd\u4f1a\u5f71\u54cd\u6838\u5fc3\u63a5\u53e3\u6027\u80fd\uff0c\u800c\u4fdd\u8bc1\u4e00\u4e2a\u53ef\u63a5\u53d7\u7684 cache \u547d\u4e2d\u7387\uff0c\u8017\u8d39\u7684\u5185\u5b58\u4e0e storage \u5dee\u522b\u4e0d\u5927\u3002\u4f46\u5fae\u535a\u7ecf\u8fc7\u4e86 3 \u5e74\u7684\u6f14\u5316\uff0c\u6700\u521d\u4f5c\u4e3a\u9009\u62e9\u4f9d\u636e\u7684\u90a3\u4e9b\u5047\u8bbe\u524d\u63d0\uff0c\u6570\u636e\u6307\u6807\u90fd\u5df2\u7ecf\u53d1\u751f\u4e86\u53d8\u5316\uff1a\u968f\u7740\u7528\u6237\u57fa\u6570\u7684\u589e\u5927\uff0c\u51b7\u7528\u6237\u7684\u7edd\u5bf9\u6570\u91cf\u4e5f\u5728\u589e\u5927\uff1bRedis \u4f5c\u4e3a\u5b58\u50a8\uff0c\u4e3a\u4e86\u6570\u636e\u53ef\u9760\u6027\u5fc5\u987b\u5f00\u542f rdb \u548c aof\uff0c\u800c\u8fd9\u4f1a\u5bfc\u81f4\u4e1a\u52a1\u53ea\u80fd\u4f7f\u7528\u4e00\u534a\u7684\u673a\u5668\u5185\u5b58\uff1bRedis hash \u5b58\u50a8\u6548\u7387\u592a\u4f4e\uff0c\u7279\u522b\u662f\u4e0e\u5185\u90e8\u6781\u5ea6\u4f18\u5316\u8fc7\u7684 RedisCounter \u5bf9\u6bd4\u3002\u79cd\u79cd\u56e0\u7d20\u52a0\u5728\u4e00\u8d77\uff0c\u6700\u7ec8\u786e\u5b9a\u4e0b\u6765\u7684\u65b9\u5411\u5c31\u662f\uff1a\u5c06 Redis \u5728\u8fd9\u91cc\u7684 storage \u89d2\u8272\u964d\u4f4e\u4e3a cache \u89d2\u8272\u3002<\/p>\n<p>\u524d\u9762\u63d0\u5230\u7684\u5fae\u535a\u5173\u7cfb\u670d\u52a1\u5f53\u524d\u7684\u4e1a\u52a1\u573a\u666f\uff0c\u53ef\u4ee5\u5f52\u7eb3\u4e3a\u4e24\u7c7b\uff1a\u4e00\u7c7b\u662f\u53d6\u5217\u8868\uff0c\u4e00\u7c7b\u662f\u5224\u65ad\u5143\u7d20\u5728\u96c6\u5408\u4e2d\u662f\u5426\u5b58\u5728\uff0c\u800c\u4e14\u662f\u6279\u91cf\u7684\u3002\u5373\u4f7f\u662f Redis \u4f5c\u4e3a storage \u7684\u65f6\u4ee3\uff0c\u53d6\u5217\u8868\u90fd\u8981\u4f9d\u8d56\u524d\u9762\u7684 memcache \u5e2e\u5fd9\u6297\uff0c\u90a3\u4e48\u4f5c\u4e3a cache \u65b9\u6848\uff0c\u53d6\u5217\u8868\u5c31\u5168\u90e8\u7531 memcache \u4ee3\u52b3\u4e86\u3002\u6279\u91cf\u5224\u65ad\u5143\u7d20\u5728\u96c6\u5408\u4e2d\u662f\u5426\u5b58\u5728\uff0credis hash \u4f9d\u7136\u662f***\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4f46\u5b58\u5728\u4e24\u4e2a\u95ee\u9898\uff1acache miss \u7684\u65f6\u5019\uff0c\u4ece db \u4e2d\u83b7\u53d6\u6570\u636e\u540e\uff0cset cache \u6027\u80fd\u592a\u5dee\uff1a\u5bf9\u4e8e\u90a3\u4e9b\u5173\u6ce8\u4e86 3000 \u4eba\u7684\u5fae\u535a\u4f1a\u5458\u4eec\uff0cset cache \u5076\u5c14\u8017\u65f6\u53ef\u8fbe\u5230 10ms \u5de6\u53f3\uff0c\u8fd9\u5bf9\u4e8e\u5355\u7ebf\u7a0b\u7684 Redis \u6765\u8bf4\u662f\u81f4\u547d\u7684\uff0c\u610f\u5473\u7740\u8fd9 10ms \u5185\uff0c\u8fd9\u4e2a\u7aef\u53e3\u65e0\u6cd5\u63d0\u4f9b\u4efb\u4f55\u5176\u5b83\u7684\u670d\u52a1\u3002\u53e6\u4e00\u4e2a\u95ee\u9898\u662f Redis hash \u7684\u5185\u5b58\u4f7f\u7528\u6548\u7387\u592a\u4f4e\uff0c\u5bf9\u4e8e\u76ee\u6807\u7684 cache \u547d\u4e2d\u7387\u6765\u8bf4\uff0c\u9700\u8981\u7684 cache \u5bb9\u91cf\u8fd8\u662f\u592a\u5927\u3002\u4e8e\u662f\uff0c\u6211\u4eec\u53c8\u796d\u51fa \u201cRedis\u5b9a\u5236\u5316\u201d\u7684\u6cd5\u5b9d\uff1a\u5c06 redis hash \u66ff\u6362\u6210\u4e00\u4e2a\u201c\u56fa\u5b9a\u957f\u5ea6\u5f00\u653ehash\u5bfb\u5740\u6570\u7ec4\u201d\uff0c\u5728 Redis \u770b\u6765\u5c31\u662f\u4e00\u4e2a byte \u6570\u7ec4\uff0cset cache 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