{"id":164875,"date":"2020-09-29T12:40:07","date_gmt":"2020-09-29T04:40:07","guid":{"rendered":"http:\/\/4563.org\/?p=164875"},"modified":"2020-10-10T05:29:32","modified_gmt":"2020-10-09T21:29:32","slug":"redis-6-%e6%96%b0-feature-%e5%ae%9e%e7%8e%b0%e5%8e%9f%e7%90%86%ef%bc%9a%e5%a4%9a%e7%ba%bf%e7%a8%8b-io","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=164875","title":{"rendered":"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : RedisMasterNode <\/span>  <span><i><\/i> 8<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<ul>\n<li>Author: [email&#160;protected] \/ Supply Chain Group \/ \u540e\u7aef\u5de5\u7a0b\u5e08<\/li>\n<li>Notes: \u672c\u6765\u5728\u534a\u5e74\u524d\u5df2\u7ecf\u53d1\u8fc7\u4e00\u7bc7 TIO \u7684\u89e3\u8bfb\uff0c\u4e0a\u5468\u7ec4\u5185\u505a\u5206\u4eab\u53c8\u91cd\u65b0\u628a\u8fd9\u4e2a Topic \u62ce\u51fa\u6765\u590d\u4e60\u4e86\u4e00\u904d\uff0c\u8865\u505a\u4e86\u6027\u80fd\u6d4b\u8bd5\u3002\u4ee5\u4e0b\u662f Presentation \u7528\u7684\u6587\u7a3f\uff0c\u6587\u672b\u662f\u6027\u80fd\u6d4b\u8bd5\u7ed3\u679c\u548c\u4e00\u4e9b\u5b66\u4e60 Redis \u65b9\u6cd5\u7684\u5b89\u5229\u3002<\/li>\n<\/ul>\n<h1>Introduction<\/h1>\n<p> <\/p>\n<p>Redis \u4ece 6.0 \u7248\u672c\u5f00\u59cb\u5f15\u5165\u4e86 Threaded I\/O\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u63d0\u5347\u6267\u884c\u547d\u4ee4\u524d\u540e\u7684\u7f51\u7edc I\/O \u6027\u80fd\u3002\u672c\u6587\u4f1a\u5148\u4ece Redis \u7684\u4e3b\u6d41\u7a0b\u5f00\u59cb\u5206\u6790\uff0c\u8bb2\u89e3\u7f51\u7edc I\/O \u53d1\u751f\u5728\u54ea\u91cc\uff0c\u4ee5\u53ca\u73b0\u6709\u7684\u7f51\u7edc I\/O \u6a21\u578b\uff0c\u7136\u540e\u4ecb\u7ecd Threaded I\/O \u7684\u65b0\u6a21\u578b\u3001\u5b9e\u73b0\u4ee5\u53ca\u751f\u6548\u573a\u666f\uff0c\u6700\u540e\u4f1a\u8fdb\u884c\u573a\u666f\u6d4b\u8bd5\uff0c\u5bf9\u6bd4 Threaded I\/O \u5173\u95ed\u4e0e\u5f00\u542f\uff0c\u4ee5\u53ca\u542f\u7528 Threaded I\/O \u4e0e\u5728\u5355\u5b9e\u4f8b\u4e0a\u642d\u5efa\u96c6\u7fa4\u7684\u6027\u80fd\u5dee\u5f02\u3002\u5982\u679c\u4f60\u5df2\u7ecf\u4e86\u89e3\u8fc7 Redis \u7684\u5faa\u73af\u6d41\u7a0b\uff0c\u53ef\u4ee5\u76f4\u63a5\u8df3\u81f3<strong>Threaded I\/O \u76f8\u5173<\/strong>\u7684\u90e8\u5206\uff1b\u5982\u679c\u4f60\u53ea\u5173\u5fc3\u65b0\u529f\u80fd\u7684\u5b9e\u9645\u63d0\u5347\uff0c\u53ef\u4ee5\u8df3\u81f3<strong>\u6027\u80fd\u6d4b\u8bd5<\/strong>\u90e8\u5206\u67e5\u770b\u3002<\/p>\n<h1>Redis \u662f\u5982\u4f55\u8fd0\u884c\u7684<\/h1>\n<p> <\/p>\n<h2>\u4e8b\u4ef6\u5faa\u73af<\/h2>\n<h3>main<\/h3>\n<p>Redis \u7684\u5165\u53e3\u4f4d\u4e8e server.c \u4e0b\uff0c<code>main()<\/code>\u65b9\u6cd5\u6d41\u7a0b\u5982\u56fe\u6240\u793a\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/c82c38d679b64fd9b40ba5d6bbc96d03tplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/> \u5728<code>main()<\/code>\u65b9\u6cd5\u4e2d Redis \u9996\u5148\u9700\u8981\u505a\u7684\u662f<strong>\u521d\u59cb\u5316\u5404\u79cd\u5e93\u4ee5\u53ca\u670d\u52a1\u914d\u7f6e<\/strong>\u3002\u5177\u4f53\u4e3e\u4f8b\uff1a<\/p>\n<ul>\n<li><code>crc64_init()<\/code>\u4f1a\u521d\u59cb\u5316\u4e00\u4e2a crc \u6821\u9a8c\u7528\u7684 Lookup Table<\/li>\n<li><code>getRandomBytes()<\/code>\u4e3a<code>hashseed<\/code>\u586b\u5145\u968f\u673a\u5143\u7d20\u4f5c\u4e3a\u521d\u59cb\u5316\u503c\uff0c\u7528\u4f5c\u54c8\u5e0c\u8868\u7684 seed<\/li>\n<li>&#8230;<\/li>\n<li><code>initServerConfig()<\/code>\u4e2d\u6267\u884c\u4e86\u5927\u91cf\u5bf9<code>server<\/code>\u5bf9\u8c61\u5c5e\u6027\u7684\u521d\u59cb\u5316\u64cd\u4f5c\uff1a\n<ul>\n<li>\u521d\u59cb\u5316<code>server.runid<\/code>\uff0c\u5982<code>16e05f486b8d41e79593a35c8b96edaff101c194<\/code><\/li>\n<li>\u83b7\u53d6\u5f53\u524d\u7684\u65f6\u533a\u4fe1\u606f\uff0c\u5b58\u653e\u81f3<code>server.timezone<\/code>\u4e2d<\/li>\n<li>\u521d\u59cb\u5316<code>server.next_client_id<\/code>\u503c\uff0c\u4f7f\u5f97\u8fde\u63a5\u8fdb\u6765\u7684\u5ba2\u6237\u7aef id \u4ece 1 \u5f00\u59cb\u81ea\u589e<\/li>\n<li>&#8230;<\/li>\n<\/ul>\n<\/li>\n<li><code>ACLInit()<\/code>\u662f\u5bf9 Redis 6.0 \u65b0\u589e\u7684 ACL \u7cfb\u7edf\u7684\u521d\u59cb\u5316\u64cd\u4f5c\uff0c\u5305\u62ec\u521d\u59cb\u5316\u7528\u6237\u5217\u8868\u3001ACL \u65e5\u5fd7\u3001\u9ed8\u8ba4\u7528\u6237\u7b49\u4fe1\u606f<\/li>\n<li>\u901a\u8fc7<code>moduleInitModulesSystem()<\/code>\u548c<code>tlsInit()<\/code>\u521d\u59cb\u5316\u6a21\u5757\u7cfb\u7edf\u548c SSL \u7b49<\/li>\n<li>&#8230;<\/li>\n<\/ul>\n<p>\u521d\u59cb\u5316\u7ed3\u675f\u540e\uff0c\u5f00\u59cb<strong>\u8bfb\u53d6\u7528\u6237\u7684\u542f\u52a8\u53c2\u6570<\/strong>\uff0c\u548c\u5927\u591a\u6570\u914d\u7f6e\u52a0\u8f7d\u8fc7\u7a0b\u7c7b\u4f3c\uff0cRedis \u4e5f\u901a\u8fc7\u5b57\u7b26\u4e32\u5339\u914d\u7b49\u5206\u6790\u7528\u6237\u8f93\u5165\u7684<code>argc<\/code>\u548c<code>argv[]<\/code>\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u53d1\u751f\uff1a<\/p>\n<ul>\n<li>\u83b7\u53d6\u5230\u914d\u7f6e\u6587\u4ef6\u8def\u5f84\uff0c\u4fee\u6539<code>server.configfile<\/code>\u7684\u503c\uff0c\u540e\u7eed\u7528\u4e8e\u52a0\u8f7d\u914d\u7f6e\u6587\u4ef6<\/li>\n<li>\u83b7\u53d6\u5230\u542f\u52a8\u9009\u9879\u53c2\u6570\uff0c\u5982<code>loadmodule<\/code>\u548c\u5bf9\u5e94\u7684 Module \u6587\u4ef6\u8def\u5f84\uff0c\u4fdd\u5b58\u81f3<code>options<\/code>\u53d8\u91cf\u4e2d<\/li>\n<\/ul>\n<p>\u89e3\u6790\u5b8c\u53c2\u6570\u4e4b\u540e\uff0c\u6267\u884c<code>loadServerConfig()<\/code>\uff0c<strong>\u8bfb\u53d6\u914d\u7f6e\u6587\u4ef6\u5e76\u4e0e\u547d\u4ee4\u884c\u53c2\u6570 options \u7684\u5185\u5bb9\u8fdb\u884c\u5408\u5e76<\/strong>\uff0c\u7ec4\u6210\u4e00\u4e2a<code>config<\/code>\u53d8\u91cf\uff0c\u5e76\u4e14\u9010\u4e2a\u5c06 name \u548c value \u8bbe\u7f6e\u8fdb configs \u5217\u8868\u4e2d\u3002\u5bf9\u4e8e\u6bcf\u4e2a config\uff0c\u6709\u5bf9\u5e94\u7684 switch-case \u7684\u4ee3\u7801\uff0c\u4f8b\u5982\u5bf9\u4e8e<code>loadmodule<\/code>\uff0c\u4f1a\u6267\u884c<code>queueLoadModule()<\/code>\u65b9\u6cd5\uff0c\u4ee5\u5b8c\u6210\u771f\u6b63\u7684\u914d\u7f6e\u52a0\u8f7d\uff1a<\/p>\n<pre><code>...         } else if (!strcasecmp(argv[0],\"logfile\") &amp;&amp; argc == 2) {                ...          } else if (!strcasecmp(argv[0],\"loadmodule\") &amp;&amp; argc &gt;= 2) {             queueLoadModule(argv[1],&amp;argv[2],argc-2);         } else if (!strcasecmp(argv[0],\"sentinel\")) { ... <\/code><\/pre>\n<p>\u56de\u5230<code>main<\/code>\u65b9\u6cd5\u7684\u6d41\u7a0b\uff0cRedis \u4f1a\u5f00\u59cb\u6253\u5370\u542f\u52a8\u7684\u65e5\u5fd7\uff0c\u6267\u884c<code>initServer()<\/code>\u65b9\u6cd5\uff0c\u670d\u52a1\u6839\u636e\u914d\u7f6e\u9879\uff0c\u7ee7\u7eed<strong>\u4e3a<code>server<\/code>\u5bf9\u8c61\u521d\u59cb\u5316\u5185\u5bb9<\/strong>\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u521b\u5efa\u4e8b\u4ef6\u5faa\u73af\u7ed3\u6784\u4f53<code>aeEventLoop<\/code>\uff08\u5b9a\u4e49\u5728 ae.h \uff09\uff0c\u8d4b\u503c\u7ed9<code>server.el<\/code><\/li>\n<li>\u6839\u636e\u914d\u7f6e\u7684 db \u6570\u76ee\uff0c\u5206\u914d\u5927\u5c0f\u4e3a<code>sizeof(redisDb) * dbnum<\/code>\u7684\u5185\u5b58\u7a7a\u95f4\uff0c<code>server.db<\/code>\u4fdd\u5b58\u8fd9\u5757\u7a7a\u95f4\u7684\u5730\u5740\u6307\u9488<\/li>\n<li>\u6bcf\u4e2a db \u90fd\u662f\u4e00\u4e2a redisDb \u7ed3\u6784\uff0c\u5c06\u8fd9\u4e2a\u7ed3\u6784\u4e2d\u7684\u4fdd\u5b58 key \u3001\u4fdd\u5b58\u8fc7\u671f\u65f6\u95f4\u7b49\u7684\u5b57\u5178\u521d\u59cb\u5316\u4e3a\u7a7a dict<\/li>\n<li>&#8230;<\/li>\n<\/ul>\n<p>\u6b64\u540e\u5c31\u662f\u4e00\u4e9b\u6839\u636e\u4e0d\u540c\u8fd0\u884c\u6a21\u5f0f\u7684\u521d\u59cb\u5316\uff0c\u4f8b\u5982\u5e38\u89c4\u6a21\u5f0f\u8fd0\u884c\u65f6\u4f1a\u8bb0\u5f55\u5e38\u89c4\u65e5\u5fd7\u3001\u52a0\u8f7d\u78c1\u76d8\u6301\u4e45\u5316\u7684\u6570\u636e\uff1b\u800c\u5728 sentinel \u6a21\u5f0f\u8fd0\u884c\u65f6\u8bb0\u5f55\u54e8\u5175\u65e5\u5fd7\uff0c\u4e0d\u52a0\u8f7d\u6570\u636e\u7b49\u3002<\/p>\n<p>\u5728\u6240\u6709\u51c6\u5907\u64cd\u4f5c\u90fd\u5b8c\u6210\u540e\uff0c<strong>Redis \u5f00\u59cb\u9677\u5165<code>aeMain()<\/code>\u7684\u4e8b\u4ef6\u5faa\u73af\uff0c\u5728\u8fd9\u4e2a\u5faa\u73af\u4e2d\u4f1a\u4e0d\u65ad\u6267\u884c<code>aeProcessEvents()<\/code>\u5904\u7406\u53d1\u751f\u7684\u5404\u79cd\u4e8b\u4ef6\uff0c\u76f4\u5230 Redis \u7ed3\u675f\u9000\u51fa<\/strong>\u3002<\/p>\n<h3>\u4e24\u79cd\u4e8b\u4ef6<\/h3>\n<p>Redis \u4e2d\u5b58\u5728\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u4e8b\u4ef6\uff1a<strong>\u65f6\u95f4\u4e8b\u4ef6<\/strong>\u3001<strong>\u6587\u4ef6\u4e8b\u4ef6<\/strong>\u3002<\/p>\n<p><strong>\u65f6\u95f4\u4e8b\u4ef6\u4e5f\u5c31\u662f\u5230\u4e86\u4e00\u5b9a\u65f6\u95f4\u4f1a\u53d1\u751f\u7684\u4e8b\u4ef6<\/strong>\uff0c\u5728 Redis \u4e2d\u5b83\u4eec\u88ab\u8bb0\u5f55\u6210\u4e00\u4e2a\u94fe\u8868\uff0c\u6bcf\u6b21\u521b\u5efa\u65b0\u7684\u65f6\u95f4\u4e8b\u4ef6\u7684\u65f6\u5019\uff0c\u90fd\u4f1a\u5728\u94fe\u8868\u5934\u90e8\u63d2\u5165\u4e00\u4e2a<code>aeTimeEvent<\/code>\u8282\u70b9\uff0c\u5176\u4e2d\u4fdd\u5b58\u4e86\u8be5\u4e8b\u4ef6\u4f1a\u5728\u4f55\u65f6\u53d1\u751f\uff0c\u9700\u8981\u8c03\u7528\u4ec0\u4e48\u6837\u7684\u65b9\u6cd5\u5904\u7406\u3002\u904d\u5386\u6574\u4e2a\u94fe\u8868\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\u79bb\u6700\u8fd1\u8981\u53d1\u751f\u7684\u65f6\u95f4\u4e8b\u4ef6\u8fd8\u6709\u591a\u4e45\uff0c\u56e0\u4e3a\u94fe\u8868\u91cc\u9762\u7684\u8282\u70b9\u6309\u7167\u81ea\u589e id \u987a\u5e8f\u6392\u5217\uff0c\u800c\u5728\u53d1\u751f\u65f6\u95f4\u7684\u7ef4\u5ea6\u4e0a\u65f6\u4e71\u5e8f\u7684\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/7d7a7b5e4cb54910b8f734a1704353ectplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/><\/p>\n<p><strong>\u6587\u4ef6\u4e8b\u4ef6\u53ef\u4ee5\u770b\u4f5c I\/O \u5f15\u8d77\u7684\u4e8b\u4ef6<\/strong>\uff0c\u5ba2\u6237\u7aef\u53d1\u9001\u547d\u4ee4\u4f1a\u8ba9\u670d\u52a1\u7aef\u4ea7\u751f\u4e00\u4e2a\u8bfb I\/O\uff0c\u5bf9\u5e94\u4e00\u4e2a\u8bfb\u4e8b\u4ef6\uff1b\u540c\u6837\u5f53\u5ba2\u6237\u7aef\u7b49\u5f85\u670d\u52a1\u7aef\u6d88\u606f\u7684\u65f6\u5019\u9700\u8981\u53d8\u5f97\u53ef\u5199\uff0c\u8ba9\u670d\u52a1\u7aef\u5199\u5165\u5185\u5bb9\uff0c\u56e0\u6b64\u4f1a\u5bf9\u5e94\u4e00\u4e2a\u5199\u4e8b\u4ef6\u3002<code>AE_READABLE<\/code>\u4e8b\u4ef6\u4f1a\u5728\u5ba2\u6237\u7aef\u5efa\u7acb\u8fde\u63a5\u3001\u53d1\u9001\u547d\u4ee4\u6216\u5176\u4ed6\u8fde\u63a5\u53d8\u5f97\u53ef\u8bfb\u7684\u65f6\u5019\u53d1\u751f\uff0c\u800c<code>AE_WRITABLE<\/code>\u4e8b\u4ef6\u5219\u4f1a\u5728\u5ba2\u6237\u7aef\u8fde\u63a5\u53d8\u5f97\u53ef\u5199\u7684\u65f6\u5019\u53d1\u751f\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/1cbc8d168b6a403398db2f9394ff3b7etplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/><\/p>\n<p>\u6587\u4ef6\u4e8b\u4ef6\u7684\u7ed3\u6784\u7b80\u5355\u5f88\u591a\uff0c<code>aeFileEvent<\/code>\u8bb0\u5f55\u4e86\u8fd9\u662f\u4e00\u4e2a\u53ef\u8bfb\u4e8b\u4ef6\u8fd8\u662f\u53ef\u5199\u4e8b\u4ef6\uff0c\u5bf9\u5e94\u7684\u5904\u7406\u65b9\u6cd5\uff0c\u4ee5\u53ca\u7528\u6237\u6570\u636e\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/463861c3a3254b76954bd0e285c2bec1tplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/><\/p>\n<p>\u5982\u679c\u540c\u65f6\u53d1\u751f\u4e86\u4e24\u79cd\u4e8b\u4ef6\uff0cRedis \u4f1a\u4f18\u5148\u5904\u7406<code>AE_READABLE<\/code>\u4e8b\u4ef6\u3002<\/p>\n<h3>aeProcessEvents<\/h3>\n<p><strong><code>aeProcessEvents()<\/code>\u65b9\u6cd5\u5904\u7406\u5df2\u7ecf\u53d1\u751f\u548c\u5373\u5c06\u53d1\u751f\u7684\u5404\u79cd\u4e8b\u4ef6<\/strong>\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/6d277dffaf6b46359a8d15a2d48eb2d3tplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/><\/p>\n<p>\u5728<code>aeMain()<\/code>\u5faa\u73af\u8fdb\u5165<code>aeProcessEvents()<\/code>\u540e\uff0cRedis \u9996\u5148\u68c0\u67e5\u4e0b\u4e00\u6b21\u7684\u65f6\u95f4\u4e8b\u4ef6\u4f1a\u5728\u4ec0\u4e48\u65f6\u5019\u53d1\u751f\uff0c\u5728\u8fd8\u6ca1\u6709\u65f6\u95f4\u4e8b\u4ef6\u53d1\u751f\u7684\u8fd9\u6bb5\u65f6\u95f4\u5185\uff0c\u53ef\u4ee5\u8c03\u7528\u591a\u8def\u590d\u7528\u7684 API <code>aeApiPoll()<\/code>\u963b\u585e\u5e76\u7b49\u5f85\u6587\u4ef6\u4e8b\u4ef6\u7684\u53d1\u751f\u3002\u5982\u679c\u6ca1\u6709\u6587\u4ef6\u4e8b\u4ef6\u53d1\u751f\uff0c\u90a3\u4e48\u8d85\u65f6\u540e\u8fd4\u56de 0\uff0c\u5426\u5219\u8fd4\u56de\u5df2\u53d1\u751f\u7684\u6587\u4ef6\u4e8b\u4ef6\u6570\u91cf<code>numevents<\/code>\u3002<\/p>\n<p>\u5728\u6709\u6587\u4ef6\u4e8b\u4ef6\u53ef\u5904\u7406\u7684\u60c5\u51b5\u4e0b\uff0cRedis \u4f1a\u8c03\u7528<code>AE_READABLE<\/code>\u4e8b\u4ef6\u7684<code>rfileProc<\/code>\u65b9\u6cd5\u4ee5\u53ca<code>AE_WRITABLE<\/code>\u4e8b\u4ef6\u7684<code>wfileProc<\/code>\u65b9\u6cd5\u8fdb\u884c\u5904\u7406\uff1a<\/p>\n<pre><code>...             if (!invert &amp;&amp; fe-&gt;mask &amp; mask &amp; AE_READABLE) {                 fe-&gt;rfileProc(eventLoop,fd,fe-&gt;clientData,mask);                 fired++;                 fe = &amp;eventLoop-&gt;events[fd];             }              if (fe-&gt;mask &amp; mask &amp; AE_WRITABLE) {                 if (!fired || fe-&gt;wfileProc != fe-&gt;rfileProc) {                     fe-&gt;wfileProc(eventLoop,fd,fe-&gt;clientData,mask);                     fired++;                 }             } ... <\/code><\/pre>\n<p>\u5728\u5b8c\u6210\u524d\u9762\u7684\u5904\u7406\u540e\uff0cRedis \u4f1a\u7ee7\u7eed\u8c03\u7528<code>processTimeEvents()<\/code>\u5904\u7406\u65f6\u95f4\u4e8b\u4ef6\u3002\u904d\u5386\u6574\u4e2a\u65f6\u95f4\u4e8b\u4ef6\u94fe\u8868\uff0c\u5982\u679c\u6b64\u65f6\u5df2\u7ecf\u8fc7\u4e86\u4e00\u6bb5\u65f6\u95f4\uff08\u963b\u585e\u7b49\u5f85\u6216\u5904\u7406\u6587\u4ef6\u4e8b\u4ef6\u8017\u65f6\uff09\uff0c\u6709\u65f6\u95f4\u4e8b\u4ef6\u53d1\u751f\uff0c\u90a3\u4e48\u5c31\u8c03\u7528\u5bf9\u5e94\u65f6\u95f4\u4e8b\u4ef6\u7684<code>timeProc<\/code>\u65b9\u6cd5\uff0c\u5c06\u6240\u6709\u5df2\u7ecf\u8fc7\u65f6\u7684\u65f6\u95f4\u4e8b\u4ef6\u5904\u7406\u6389\uff1a<\/p>\n<pre><code>...         if (te-&gt;when &lt;= now) {             ...             retval = te-&gt;timeProc(eventLoop, id, te-&gt;clientData);             ...             processed++;             ...         } ... <\/code><\/pre>\n<p>\u5982\u679c\u6267\u884c\u4e86\u6587\u4ef6\u4e8b\u4ef6\u4e4b\u540e\u8fd8\u6ca1\u6709\u5230\u6700\u8fd1\u7684\u65f6\u95f4\u4e8b\u4ef6\u53d1\u751f\u70b9\uff0c\u90a3\u4e48\u672c\u6b21<code>aeMain()<\/code>\u5faa\u73af\u4e2d\u5c06\u6ca1\u6709\u65f6\u95f4\u4e8b\u4ef6\u88ab\u6267\u884c\uff0c\u8fdb\u5165\u4e0b\u4e00\u6b21\u5faa\u73af\u3002<\/p>\n<h2>\u547d\u4ee4\u6267\u884c\u524d\u540e\u53d1\u751f\u4e86\u4ec0\u4e48<\/h2>\n<p>\u5728\u5ba2\u6237\u7aef\u8fde\u63a5\u4e0a Redis \u7684\u65f6\u5019\uff0c\u901a\u8fc7\u6267\u884c<code>connSetReadHandler(conn, readQueryFromClient)<\/code>\uff0c\u8bbe\u7f6e\u4e86\u5f53\u8bfb\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c\u4f7f\u7528<code>readQueryFromClient()<\/code>\u4f5c\u4e3a\u8bfb\u4e8b\u4ef6\u7684 Handler \u3002<\/p>\n<p>\u5728\u6536\u5230\u5ba2\u6237\u7aef\u7684\u547d\u4ee4\u8bf7\u6c42\u65f6\uff0cRedis \u8fdb\u884c\u4e00\u4e9b\u68c0\u67e5\u548c\u7edf\u8ba1\u540e\uff0c\u8c03\u7528<code>read()<\/code>\u65b9\u6cd5\u5c06\u8fde\u63a5\u4e2d\u7684\u6570\u636e\u8bfb\u53d6\u8fdb<code>client.querybuf<\/code>\u6d88\u606f\u7f13\u51b2\u533a\u4e2d\uff1a<\/p>\n<pre><code>void readQueryFromClient(connection *conn) {     ...     nread = connRead(c-&gt;conn, c-&gt;querybuf+qblen, readlen);     ...   static inline int connRead(connection *conn, void *buf, size_t buf_len) {     return conn-&gt;type-&gt;read(conn, buf, buf_len); }  static int connSocketRead(connection *conn, void *buf, size_t buf_len) {     int ret = read(conn-&gt;fd, buf, buf_len);     ... } <\/code><\/pre>\n<p>\u7136\u540e\u8fdb\u5165<code>processInputBuffer(c)<\/code>\u5f00\u59cb\u8bfb\u53d6\u8f93\u5165\u7f13\u51b2\u533a\u4e2d\u7684\u6d88\u606f\uff0c\u6700\u540e\u8fdb\u5165<code>processCommand(c)<\/code>\u5f00\u59cb\u5904\u7406\u8f93\u5165\u7684\u547d\u4ee4\u3002<\/p>\n<p>\u5728\u547d\u4ee4\u6267\u884c\u5f97\u5230\u7ed3\u679c\u540e\uff0c\u9996\u5148\u4f1a\u5b58\u653e\u5728<code>client.buf<\/code>\u4e2d\uff0c\u5e76\u4e14\u8c03\u7528\u8c03\u7528<code>addReply(client *c, robj *obj)<\/code>\u65b9\u6cd5\uff0c\u5c06\u8fd9\u4e2a<code>client<\/code>\u5bf9\u8c61\u8ffd\u52a0\u5230<code>server.clients_pending_write<\/code>\u5217\u8868\u4e2d\u3002\u6b64\u65f6\u5f53\u6b21\u7684\u547d\u4ee4\uff0c\u6216\u8005\u8bf4<code>AE_READABLE<\/code>\u4e8b\u4ef6\u5c31\u5df2\u7ecf\u57fa\u672c\u5904\u7406\u5b8c\u6bd5\u4e86\uff0c\u9664\u4e86\u4e00\u4e9b\u989d\u5916\u7684\u7edf\u8ba1\u6570\u636e\u3001\u540e\u5904\u7406\u4ee5\u5916\uff0c\u4e0d\u4f1a\u518d\u8fdb\u884c\u53d1\u9001\u54cd\u5e94\u6d88\u606f\u7684\u52a8\u4f5c\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/49572bc59cc8478d9abd8d57a2268faatplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/><\/p>\n<p>\u5728\u5f53\u524d<code>aeProcessEvents()<\/code>\u65b9\u6cd5\u7ed3\u675f\u540e\uff0c\u8fdb\u5165<strong>\u4e0b\u4e00\u6b21\u7684\u5faa\u73af<\/strong>\uff0c\u7b2c\u4e8c\u6b21\u5faa\u73af\u8c03\u7528 I\/O \u591a\u8def\u590d\u7528\u63a5\u53e3\u7b49\u5f85\u6587\u4ef6\u4e8b\u4ef6\u53d1\u751f\u524d\uff0cRedis \u4f1a\u68c0\u67e5<code>server.clients_pending_write<\/code>\u662f\u5426\u6709\u5ba2\u6237\u7aef\u9700\u8981\u8fdb\u884c\u56de\u590d\uff0c\u82e5\u6709\uff0c\u904d\u5386\u6307\u5411\u5404\u4e2a\u5f85\u56de\u590d\u5ba2\u6237\u7aef\u7684<code>server.clients_pending_write<\/code>\u5217\u8868\uff0c\u9010\u4e2a\u5c06\u5ba2\u6237\u7aef\u4ece\u4e2d\u5220\u9664\uff0c\u5e76\u5c06\u5f85\u56de\u590d\u7684\u5185\u5bb9\u901a\u8fc7<code>writeToClient(c,0)<\/code>\u56de\u590d\u51fa\u53bb<\/p>\n<pre><code>int writeToClient(client *c, int handler_installed) {     ...     nwritten = connWrite(c-&gt;conn,c-&gt;buf+c-&gt;sentlen,c-&gt;bufpos-c-&gt;sentlen);     ...  static inline int connWrite(connection *conn, const void *data, size_t data_len) {     return conn-&gt;type-&gt;write(conn, data, data_len); }  static int connSocketWrite(connection *conn, const void *data, size_t data_len) {     int ret = write(conn-&gt;fd, data, data_len);     ... } <\/code><\/pre>\n<h1>Threaded I\/O \u6a21\u578b<\/h1>\n<p> <\/p>\n<h2>I\/O \u95ee\u9898\u4e0e Threaded I\/O \u7684\u5f15\u5165<\/h2>\n<p>\u5982\u679c\u8981\u8bf4 Redis \u4f1a\u6709\u4ec0\u4e48\u6027\u80fd\u95ee\u9898\uff0c\u90a3\u4e48\u4ece I\/O \u89d2\u5ea6\uff0c\u7531\u4e8e\u5b83\u6ca1\u6709\u50cf\u5176\u4ed6 Database \u4e00\u6837\u4f7f\u7528\u78c1\u76d8\uff0c\u6240\u4ee5\u4e0d\u5b58\u5728\u78c1\u76d8 I\/O \u7684\u95ee\u9898\u3002\u5728\u6570\u636e\u8fdb\u5165\u7f13\u51b2\u533a\u524d\u53ca\u4ece\u7f13\u51b2\u533a\u5199\u81f3 Socket \u65f6\uff0c\u5b58\u5728\u4e00\u5b9a\u7684\u7f51\u7edc I\/O\uff0c\u7279\u522b\u662f\u5199 I\/O \u5bf9\u6027\u80fd\u5f71\u54cd\u6bd4\u8f83\u5927\u3002\u4ee5\u5f80\u6211\u4eec\u4f1a\u8003\u8651\u505a\u7ba1\u9053\u5316\u6765\u51cf\u5c0f\u7f51\u7edc I\/O \u7684\u5f00\u9500\uff0c\u6216\u8005\u5c06 Redis \u90e8\u7f72\u6210 Redis \u96c6\u7fa4\u6765\u63d0\u5347\u6027\u80fd\u3002<\/p>\n<p>\u5728 Redis 6.0 \u4e4b\u540e\uff0c\u7531\u4e8e Threaded I\/O \u7684\u5f15\u5165\uff0cRedis \u5f00\u59cb\u652f\u6301\u5bf9\u7f51\u7edc\u8bfb\u5199\u7684\u7ebf\u7a0b\u5316\uff0c\u8ba9\u66f4\u591a\u7684\u7ebf\u7a0b\u53c2\u4e0e\u8fdb\u8fd9\u90e8\u5206\u52a8\u4f5c\u4e2d\uff0c\u540c\u65f6\u4fdd\u6301\u547d\u4ee4\u7684\u5355\u7ebf\u7a0b\u6267\u884c\u3002\u8fd9\u6837\u7684\u6539\u52a8\u4ece\u67d0\u79cd\u7a0b\u5ea6\u4e0a\u8bf4\u53ef\u4ee5\u65e2\u63d0\u5347\u6027\u80fd\uff0c\u4f46\u53c8\u907f\u514d\u5c06\u547d\u4ee4\u6267\u884c\u7ebf\u7a0b\u5316\u800c\u9700\u8981\u5f15\u5165\u9501\u6216\u8005\u5176\u4ed6\u65b9\u5f0f\u89e3\u51b3\u5e76\u884c\u6267\u884c\u7684\u7ade\u6001\u95ee\u9898\u3002<\/p>\n<h2>Threaded I\/O \u5728\u505a\u4ec0\u4e48<\/h2>\n<p>\u5728\u8001\u7248\u672c\u7684\u5b9e\u73b0\u4e2d\uff0cRedis \u5c06\u4e0d\u540c client \u7684\u547d\u4ee4\u6267\u884c\u7ed3\u679c\u4fdd\u5b58\u5728\u5404\u81ea\u7684<code>client.buf<\/code>\u4e2d\uff0c\u7136\u540e\u628a\u5f85\u56de\u590d\u7684<code>client<\/code>\u5b58\u653e\u5728\u4e00\u4e2a\u5217\u8868\u91cc\uff0c\u6700\u540e\u5728\u4e8b\u4ef6\u5faa\u73af\u4e2d\u9010\u4e2a\u5c06<code>buf<\/code>\u7684\u5185\u5bb9\u5199\u81f3\u5bf9\u5e94 Socket \u3002\u5bf9\u5e94\u5728\u65b0\u7248\u672c\u4e2d\uff0cRedis \u4f7f\u7528\u591a\u4e2a\u7ebf\u7a0b\u5b8c\u6210\u8fd9\u90e8\u5206\u64cd\u4f5c\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/c73e52d41409493e90bea747a59ebdb4tplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/><\/p>\n<p>\u5bf9\u8bfb\u64cd\u4f5c\uff0cRedis \u540c\u6837\u5730\u4e3a<code>server<\/code>\u5bf9\u8c61\u65b0\u589e\u4e86\u4e00\u4e2a<code>clients_pending_read<\/code>\u5c5e\u6027\uff0c\u5f53\u8bfb\u4e8b\u4ef6\u6765\u4e34\u65f6\uff0c\u5224\u65ad\u662f\u5426\u6ee1\u8db3\u7ebf\u7a0b\u5316\u8bfb\u7684\u6761\u4ef6\uff0c\u5982\u679c\u6ee1\u8db3\uff0c\u90a3\u4e48\u6267\u884c\u5ef6\u8fdf\u8bfb\u64cd\u4f5c\uff0c\u5c06\u8fd9\u4e2a<code>client<\/code>\u5bf9\u8c61\u6dfb\u52a0\u5230<code>server.clients_pending_read<\/code>\u5217\u8868\u4e2d\u3002\u548c\u5199\u64cd\u4f5c\u4e00\u6837\uff0c\u7559\u5230\u4e0b\u4e00\u6b21\u4e8b\u4ef6\u5faa\u73af\u65f6\u4f7f\u7528\u591a\u4e2a\u7ebf\u7a0b\u5b8c\u6210\u8bfb\u64cd\u4f5c\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/3836cd380dad4bf18a6dfad38b8adfcetplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/><\/p>\n<h1>Threaded I\/O \u7684\u5b9e\u73b0\u4e0e\u9650\u5236<\/h1>\n<p> <\/p>\n<h2>Init \u9636\u6bb5<\/h2>\n<p>\u5728 Redis \u542f\u52a8\u65f6\uff0c\u5982\u679c\u6ee1\u8db3\u5bf9\u5e94\u53c2\u6570\u914d\u7f6e\uff0c\u4f1a\u8fdb\u884c I\/O \u7ebf\u7a0b\u521d\u59cb\u5316\u7684\u64cd\u4f5c\u3002<\/p>\n<pre><code>void initThreadedIO(void) {     server.io_threads_active = 0;     if (server.io_threads_num == 1) return;      if (server.io_threads_num &gt; IO_THREADS_MAX_NUM) {         serverLog(LL_WARNING,\"Fatal: too many I\/O threads configured. \"                              \"The maximum number is %d.\", IO_THREADS_MAX_NUM);         exit(1);     } ... <\/code><\/pre>\n<p>Redis \u4f1a\u8fdb\u884c\u4e00\u4e9b\u5e38\u89c4\u68c0\u67e5\uff0c\u914d\u7f6e\u6570\u662f\u5426\u7b26\u5408\u5f00\u542f\u591a\u7ebf\u7a0b I\/O \u7684\u8981\u6c42\u3002<\/p>\n<pre><code>...     for (int i = 0; i &lt; server.io_threads_num; i++) {         io_threads_list[i] = listCreate(); ... <\/code><\/pre>\n<p>\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a\u7ebf\u7a0b\u6570\u7684<code>io_threads_list<\/code>\u5217\u8868\uff0c\u5217\u8868\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u53e6\u4e00\u4e2a\u5217\u8868 L\uff0cL \u5c06\u4f1a\u7528\u6765\u5b58\u653e\u5bf9\u5e94\u7ebf\u7a0b\u5f85\u5904\u7406\u7684\u591a\u4e2a<code>client<\/code>\u5bf9\u8c61\u3002<\/p>\n<pre><code>...         if (i == 0) continue; ... <\/code><\/pre>\n<p>\u5bf9\u4e8e\u4e3b\u7ebf\u7a0b\uff0c\u521d\u59cb\u5316\u64cd\u4f5c\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86\u3002<\/p>\n<pre><code>...         pthread_t tid;         pthread_mutex_init(&amp;io_threads_mutex[i],NULL);         io_threads_pending[i] = 0;         pthread_mutex_lock(&amp;io_threads_mutex[i]); \/* Thread will be stopped. *\/         if (pthread_create(&amp;tid,NULL,IOThreadMain,(void*)(long)i) != 0) {             serverLog(LL_WARNING,\"Fatal: Can't initialize IO thread.\");             exit(1);         }         io_threads[i] = tid;     } } ... <\/code><\/pre>\n<p><code>io_threads_mutex<\/code>\u662f\u4e00\u4e2a\u4e92\u65a5\u9501\u5217\u8868\uff0c<code>io_threads_mutex[i]<\/code>\u5373\u7b2c<code>i<\/code>\u4e2a\u7ebf\u7a0b\u7684\u9501\uff0c\u7528\u4e8e\u540e\u7eed\u963b\u585e I\/O \u7ebf\u7a0b\u64cd\u4f5c\uff0c\u521d\u59cb\u5316\u4e4b\u540e\u5c06\u5176\u6682\u65f6\u9501\u5b9a\u3002\u7136\u540e\u518d\u5bf9\u6bcf\u4e2a\u7ebf\u7a0b\u6267\u884c\u521b\u5efa\u64cd\u4f5c\uff0c<code>tid<\/code>\u5373\u5176\u6307\u9488\uff0c\u4fdd\u5b58\u81f3<code>io_threads<\/code>\u5217\u8868\u4e2d\u3002\u65b0\u7684\u7ebf\u7a0b\u4f1a\u4e00\u76f4\u6267\u884c<code>IOThreadMain<\/code>\u65b9\u6cd5\uff0c\u6211\u4eec\u5c06\u5b83\u653e\u5230\u6700\u540e\u8bb2\u89e3\u3002<\/p>\n<h2>Reads\/Writes<\/h2>\n<p>\u591a\u7ebf\u7a0b\u7684\u8bfb\u5199\u4e3b\u8981\u5728<code>handleClientsWithPendingReadsUsingThreads()<\/code>\u548c<code>handleClientsWithPendingWritesUsingThreads()<\/code>\u4e2d\u5b8c\u6210\uff0c\u56e0\u4e3a\u4e24\u8005\u51e0\u4e4e\u662f\u5bf9\u79f0\u7684\uff0c\u6240\u4ee5\u8fd9\u91cc\u53ea\u5bf9\u8bfb\u64cd\u4f5c\u8fdb\u884c\u8bb2\u89e3\uff0c\u6709\u5174\u8da3\u7684\u540c\u5b66\u53ef\u4ee5\u68c0\u67e5\u4e00\u4e0b\u5199\u64cd\u4f5c\u6709\u4ec0\u4e48\u4e0d\u540c\u7684\u5730\u65b9\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u3002<\/p>\n<pre><code>int handleClientsWithPendingReadsUsingThreads(void) {     if (!server.io_threads_active || !server.io_threads_do_reads) return 0;     int processed = listLength(server.clients_pending_read);     if (processed == 0) return 0;      if (tio_debug) printf(\"%d TOTAL READ pending clientsn\", processed); ... <\/code><\/pre>\n<p>\u540c\u6837\uff0cRedis \u4f1a\u8fdb\u884c\u5e38\u89c4\u68c0\u67e5\uff0c\u662f\u5426\u542f\u7528\u7ebf\u7a0b\u5316\u8bfb\u5199\u5e76\u4e14\u542f\u7528\u7ebf\u7a0b\u5316\u8bfb\uff08\u53ea\u5f00\u542f\u524d\u8005\u5219\u53ea\u6709\u5199\u64cd\u4f5c\u662f\u7ebf\u7a0b\u5316\uff09\uff0c\u4ee5\u53ca\u662f\u5426\u6709\u7b49\u5f85\u8bfb\u53d6\u7684\u5ba2\u6237\u7aef\u3002<\/p>\n<pre><code>...     listIter li;     listNode *ln;     listRewind(server.clients_pending_read,&amp;li);     int item_id = 0;     while((ln = listNext(&amp;li))) {         client *c = listNodeValue(ln);         int target_id = item_id % server.io_threads_num;         listAddNodeTail(io_threads_list[target_id],c);         item_id++;     } ... <\/code><\/pre>\n<p>\u8fd9\u91cc\u5c06<code>server.clients_pending_read<\/code>\u7684\u5217\u8868\u8f6c\u5316\u4e3a\u65b9\u4fbf\u904d\u5386\u7684\u94fe\u8868\uff0c\u7136\u540e\u5c06\u5217\u8868\u7684\u6bcf\u4e2a\u8282\u70b9\uff08<code>*client<\/code>\u5bf9\u8c61\uff09\u4ee5\u7c7b\u4f3c Round-Robin \u7684\u65b9\u5f0f\u5206\u914d\u4e2a\u5404\u4e2a\u7ebf\u7a0b\uff0c\u7ebf\u7a0b\u6267\u884c\u5404\u4e2a client \u7684\u8bfb\u5199\u987a\u5e8f\u5e76\u4e0d\u9700\u8981\u4fdd\u8bc1\uff0c\u547d\u4ee4\u62b5\u8fbe\u7684\u5148\u540e\u987a\u5e8f\u5df2\u7ecf\u7531<code>server.clients_pending_read\/write<\/code>\u5217\u8868\u8bb0\u5f55\uff0c\u540e\u7eed\u4e5f\u4f1a\u6309\u8fd9\u4e2a\u987a\u5e8f\u6267\u884c\u3002<\/p>\n<pre><code>...     io_threads_op = IO_THREADS_OP_READ; ... <\/code><\/pre>\n<p>\u8bbe\u7f6e\u72b6\u6001\u6807\u8bb0\uff0c\u6807\u8bc6\u5f53\u524d\u5904\u4e8e\u591a\u7ebf\u7a0b\u8bfb\u7684\u72b6\u6001\u3002\u7531\u4e8e\u6807\u8bb0\u7684\u5b58\u5728\uff0cRedis \u7684 Threaded I\/O \u77ac\u65f6\u53ea\u80fd\u5904\u4e8e\u8bfb\u6216\u5199\u7684\u72b6\u6001\uff0c\u4e0d\u80fd\u90e8\u5206\u7ebf\u7a0b\u8bfb\uff0c\u90e8\u5206\u5199\u3002<\/p>\n<pre><code>...     for (int j = 1; j &lt; server.io_threads_num; j++) {         int count = listLength(io_threads_list[j]);         io_threads_pending[j] = count;     } ... <\/code><\/pre>\n<p>\u4e3a\u6bcf\u4e2a\u7ebf\u7a0b\u8bb0\u5f55\u4e0b\u5404\u81ea\u9700\u8981\u5904\u7406\u7684\u5ba2\u6237\u7aef\u6570\u91cf\u3002\u5f53\u4e0d\u540c\u7ebf\u7a0b\u8bfb\u53d6\u5230\u81ea\u5df1\u7684 pending \u957f\u5ea6\u4e0d\u4e3a 0 \u65f6\uff0c\u5c31\u4f1a\u5f00\u59cb\u8fdb\u884c\u5904\u7406\u3002\u6ce8\u610f<code>j<\/code>\u4ece 1 \u5f00\u59cb\uff0c\u610f\u5473\u7740<code>0<\/code>\u7684\u4e3b\u7ebf\u7a0b\u7684 pending \u957f\u5ea6\u4e00\u76f4\u4e3a 0\uff0c\u56e0\u4e3a\u4e3b\u7ebf\u7a0b\u9a6c\u4e0a\u8981\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u540c\u6b65\u5b8c\u6210\u81ea\u5df1\u7684\u4efb\u52a1\uff0c\u4e0d\u9700\u8981\u77e5\u9053\u7b49\u5f85\u7684\u4efb\u52a1\u6570\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/4a4378489af044bfae6107393c337d8dtplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/><\/p>\n<pre><code>...     listRewind(io_threads_list[0],&amp;li);     while((ln = listNext(&amp;li))) {         client *c = listNodeValue(ln);         readQueryFromClient(c-&gt;conn);     }     listEmpty(io_threads_list[0]); ... <\/code><\/pre>\n<p>\u4e3b\u7ebf\u7a0b\u6b64\u65f6\u5c06\u81ea\u5df1\u8981\u5904\u7406\u7684 client \u5904\u7406\u5b8c\u3002<\/p>\n<pre><code>...     while(1) {         unsigned long pending = 0;         for (int j = 1; j &lt; server.io_threads_num; j++)             pending += io_threads_pending[j];         if (pending == 0) break;     }     if (tio_debug) printf(\"I\/O READ All threads finshedn\"); ... <\/code><\/pre>\n<p>\u9677\u5165\u5faa\u73af\u7b49\u5f85\uff0c<code>pending<\/code>\u7b49\u4e8e\u5404\u4e2a\u7ebf\u7a0b\u5269\u4f59\u4efb\u52a1\u6570\u4e4b\u548c\uff0c\u5f53\u6240\u6709\u7ebf\u7a0b\u90fd\u6ca1\u6709\u4efb\u52a1\u7684\u65f6\u5019\uff0c\u672c\u8f6e I\/O \u5904\u7406\u7ed3\u675f\u3002<\/p>\n<pre><code>...     while(listLength(server.clients_pending_read)) {         ln = listFirst(server.clients_pending_read);         client *c = listNodeValue(ln);         c-&gt;flags &amp;= ~CLIENT_PENDING_READ;         listDelNode(server.clients_pending_read,ln);          if (c-&gt;flags &amp; CLIENT_PENDING_COMMAND) {             c-&gt;flags &amp;= ~CLIENT_PENDING_COMMAND;             if (processCommandAndResetClient(c) == C_ERR) {                 continue;             }         }         processInputBuffer(c);     } ... <\/code><\/pre>\n<p>\u6211\u4eec\u5df2\u7ecf\u5728\u5404\u81ea\u7ebf\u7a0b\u4e2d\u5c06<code>conn<\/code>\u4e2d\u7684\u5185\u5bb9\u8bfb\u53d6\u81f3\u5bf9\u5e94 client \u7684<code>client.querybuf<\/code>\u8f93\u5165\u7f13\u51b2\u533a\u4e2d\uff0c\u6240\u4ee5\u53ef\u4ee5\u904d\u5386<code>server.clients_pending_read<\/code>\u5217\u8868\uff0c\u4e32\u884c\u5730\u8fdb\u884c\u547d\u4ee4\u6267\u884c\u64cd\u4f5c\uff0c\u540c\u65f6\u5c06<code>client<\/code>\u4ece\u5217\u8868\u4e2d\u79fb\u9664\u3002<\/p>\n<pre><code>...     server.stat_io_reads_processed += processed;      return processed; } <\/code><\/pre>\n<p>\u5904\u7406\u5b8c\u6210\uff0c\u5c06\u5904\u7406\u7684\u6570\u91cf\u52a0\u5230\u7edf\u8ba1\u5c5e\u6027\u4e0a\uff0c\u7136\u540e\u8fd4\u56de\u3002<\/p>\n<h2>IOThreadMain<\/h2>\n<p>\u524d\u9762\u8fd8\u6709\u6bcf\u4e2a\u7ebf\u7a0b\u5177\u4f53\u7684\u5de5\u4f5c\u5185\u5bb9\u6ca1\u6709\u89e3\u91ca\uff0c\u5b83\u4eec\u4f1a\u4e00\u76f4\u9677\u5728<code>IOThreadMain<\/code>\u7684\u5faa\u73af\u4e2d\uff0c\u7b49\u5f85\u6267\u884c\u8bfb\u5199\u7684\u65f6\u673a\u3002<\/p>\n<pre><code>void *IOThreadMain(void *myid) {     long id = (unsigned long)myid;     char thdname[16];      snprintf(thdname, sizeof(thdname), \"io_thd_%ld\", id);     redis_set_thread_title(thdname);     redisSetCpuAffinity(server.server_cpulist); ... <\/code><\/pre>\n<p>\u7167\u5e38\u6267\u884c\u4e00\u4e9b\u521d\u59cb\u5316\u5185\u5bb9\u3002<\/p>\n<pre><code>...     while(1) {         for (int j = 0; j &lt; 1000000; j++) {             if (io_threads_pending[id] != 0) break;         }          if (io_threads_pending[id] == 0) {             pthread_mutex_lock(&amp;io_threads_mutex[id]);             pthread_mutex_unlock(&amp;io_threads_mutex[id]);             continue;         }           serverAssert(io_threads_pending[id] != 0);          if (tio_debug) printf(\"[%ld] %d to handlen\", id, (int)listLength(io_threads_list[id])); ... <\/code><\/pre>\n<p>\u7ebf\u7a0b\u4f1a\u68c0\u6d4b\u81ea\u5df1\u7684\u5f85\u5904\u7406\u7684 client \u5217\u8868\u957f\u5ea6\uff0c\u5f53\u7b49\u5f85\u961f\u5217\u957f\u5ea6\u5927\u4e8e 0 \u65f6\u5f80\u4e0b\u6267\u884c\uff0c\u5426\u5219\u4f1a\u5230\u6b7b\u5faa\u73af\u8d77\u70b9\u3002<\/p>\n<p>\u8fd9\u91cc\u5229\u7528\u4e92\u65a5\u9501\uff0c\u8ba9\u4e3b\u7ebf\u7a0b\u6709\u673a\u4f1a\u52a0\u9501\uff0c\u4f7f\u5f97 I\/O \u7ebf\u7a0b\u5361\u5728\u6267\u884c<code>pthread_mutex_lock()<\/code>\uff0c\u8fbe\u5230\u8ba9 I\/O \u7ebf\u7a0b\u505c\u6b62\u5de5\u4f5c\u7684\u6548\u679c\u3002<\/p>\n<pre><code>...         listIter li;         listNode *ln;         listRewind(io_threads_list[id],&amp;li);         while((ln = listNext(&amp;li))) {             client *c = listNodeValue(ln);             if (io_threads_op == IO_THREADS_OP_WRITE) {                 writeToClient(c,0);             } else if (io_threads_op == IO_THREADS_OP_READ) {                 readQueryFromClient(c-&gt;conn);             } else {                 serverPanic(\"io_threads_op value is unknown\");             }         } ... <\/code><\/pre>\n<p>\u5c06<code>io_threads_list[i]<\/code>\u7684\u5ba2\u6237\u7aef\u5217\u8868\u8f6c\u5316\u4e3a\u65b9\u4fbf\u904d\u5386\u7684\u94fe\u8868\uff0c\u9010\u4e2a\u904d\u5386\uff0c\u501f\u52a9<code>io_threads_op<\/code>\u6807\u5fd7\u5224\u65ad\u5f53\u524d\u662f\u8981\u6267\u884c\u591a\u7ebf\u7a0b\u8bfb\u8fd8\u662f\u591a\u7ebf\u7a0b\u5199\uff0c\u5b8c\u6210\u5bf9\u81ea\u5df1\u8981\u5904\u7406\u7684\u5ba2\u6237\u7aef\u7684\u64cd\u4f5c\u3002<\/p>\n<pre><code>...         listEmpty(io_threads_list[id]);         io_threads_pending[id] = 0;          if (tio_debug) printf(\"[%ld] Donen\", id);     } } <\/code><\/pre>\n<p>\u6e05\u7a7a\u81ea\u5df1\u8981\u5904\u7406\u7684\u5ba2\u6237\u7aef\u5217\u8868\uff0c\u5e76\u4e14\u5c06\u81ea\u5df1\u7684\u5f85\u5904\u7406\u6570\u91cf\u4fee\u6539\u4e3a 0\uff0c\u7ed3\u675f\u672c\u8f6e\u64cd\u4f5c\u3002<\/p>\n<h2>Limitation<\/h2>\n<p>\u901a\u8fc7\u67e5\u770b\u4ee3\u7801\uff0c\u4f7f\u7528\u4e0a Threaded I\/O \u7684\u542f\u7528\u53d7\u4ee5\u4e0b\u6761\u4ef6\u5f71\u54cd\uff1a<\/p>\n<ul>\n<li>\u914d\u7f6e\u9879<code>io-threads<\/code>\u9700\u8981\u5927\u4e8e 1\uff0c\u5426\u5219\u4f1a\u7ee7\u7eed\u4f7f\u7528\u5355\u7ebf\u7a0b\u64cd\u4f5c\u8bfb\u5199 I\/O<\/li>\n<li>\u914d\u7f6e\u9879<code>io-threads-do-reads<\/code>\u63a7\u5236\u8bfb I\/O \u662f\u5426\u4f7f\u7528\u7ebf\u7a0b\u5316<\/li>\n<li>\u5bf9\u4e8e\u5ef6\u8fdf\u8bfb\u53d6\uff0c\u7531<code>postponeClientRead()<\/code>\u65b9\u6cd5\u63a7\u5236\u3002\u65b9\u6cd5\u4e2d\u9664\u4e86\u914d\u7f6e\u8981\u6c42\u5916\uff0c\u8fd8\u9700\u8981\u5f53\u524d client \u4e0d\u80fd\u662f\u4e3b\u4ece\u6a21\u578b\u7684\u89d2\u8272\uff0c\u4e5f\u4e0d\u80fd\u5904\u4e8e\u5df2\u7ecf\u7b49\u5f85\u4e0b\u6b21\u4e8b\u4ef6\u5faa\u73af\u7ebf\u7a0b\u5316\u8bfb\u53d6\uff08<code>CLIENT_PENDING_READ<\/code>\uff09\u7684\u72b6\u6001\u3002\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d<code>client<\/code>\u5bf9\u8c61\u4f1a\u88ab\u6dfb\u52a0\u5230\u7b49\u5f85\u961f\u5217\u4e2d\uff0c\u5e76\u4e14\u5c06 client \u7684\u72b6\u6001\u6539\u4e3a<code>CLIENT_PENDING_READ<\/code>\u3002<\/li>\n<li>\u5bf9\u4e8e\u591a\u7ebf\u7a0b\u5199 I\/O\uff0c\u7531<code>handleClientsWithPendingWritesUsingThreads()<\/code>\u4e2d\u7684<code>stopThreadedIOIfNeeded()<\/code>\u65b9\u6cd5\u52a0\u4ee5\u9650\u5236\u3002\u9664\u4e86\u5bf9\u5e94\u914d\u7f6e\u9879\u8981\u6ee1\u8db3\u8981\u6c42\u5916\uff0c<code>server.clients_pending_write<\/code>\u7684\u957f\u5ea6\u9700\u8981\u5927\u4e8e\u7b49\u4e8e\u914d\u7f6e\u7ebf\u7a0b\u6570\u7684\u4e24\u500d\uff0c\u4f8b\u5982\u914d\u7f6e\u4f7f\u7528 6 \u7ebf\u7a0b\uff0c\u5f53\u5199\u961f\u5217\u957f\u5ea6\u5c0f\u4e8e 12 \u65f6\u4f1a\u7ee7\u7eed\u4f7f\u7528\u5355\u7ebf\u7a0b I\/O \u3002<\/li>\n<li>I\/O \u7ebf\u7a0b\u5728<code>initThreadedIO()<\/code>\u88ab\u521b\u5efa\u524d\uff0c\u4e92\u65a5\u9501\u5904\u4e8e\u52a0\u9501\u72b6\u6001\uff0c\u56e0\u6b64\u7ebf\u7a0b\u4e0d\u80fd\u8fdb\u884c\u5b9e\u9645\u7684\u4efb\u52a1\u5904\u7406\u3002<code>server<\/code>\u5bf9\u8c61\u7684<code>io_threads_active<\/code>\u5c5e\u6027\u9ed8\u8ba4\u4f1a\u5904\u4e8e\u5173\u95ed\u72b6\u6001\uff0c\u5728\u8fdb\u884c\u9996\u6b21\u591a\u7ebf\u7a0b\u5199\u4e4b\u524d\u624d\u4f1a\u88ab\u5f00\u542f\u3002\u8fd9\u610f\u5473\u7740\u670d\u52a1\u542f\u52a8\u540e\u7684\u8bfb\u64cd\u4f5c\u4ecd\u7136\u4f1a\u4f7f\u7528\u5355\u7ebf\u7a0b\u8bfb\uff0c\u4ea7\u751f\u6267\u884c\u7ed3\u679c\u5230\u5199\u7684 pending list \u4e2d\uff0c\u5728\u7b2c\u4e8c\u6b21\u5faa\u73af\u4e2d\uff0c\u670d\u52a1\u5224\u65ad\u662f\u5426\u6709\u914d\u7f6e\u542f\u7528 TIO\uff0c\u5c06<code>server.io_threads_active<\/code>\u5c5e\u6027\u6253\u5f00\uff0c\u7136\u540e\u8fdb\u884c\u591a\u7ebf\u7a0b\u5199\u64cd\u4f5c\uff0c\u4ece\u4e0b\u4e00\u6b21\u5faa\u73af\u5f00\u59cb TIO \u624d\u80fd\u88ab\u4f5c\u7528\u4e8e\u8bfb\u64cd\u4f5c\u4e0a\u3002\u4e0a\u4e00\u70b9\u8bf4\u8fc7\u5199 I\/O \u4f1a\u6709\u914d\u7f6e\u548c\u961f\u5217\u957f\u5ea6\u5224\u5b9a\uff0c\u5728\u5224\u5b9a\u4e0d\u9700\u8981 TIO \u5199\u65f6\uff0c\u4f1a\u91cd\u65b0\u628a<code>server.io_threads_active<\/code>\u5173\u95ed\uff0c\u610f\u5473\u7740\u5c3d\u7ba1\u4f60\u5df2\u7ecf\u5728\u914d\u7f6e\u6587\u4ef6\u91cc\u9762\u6253\u5f00 TIO \u8bfb\uff0c\u4f46\u662f Redis \u4ecd\u7136\u4f1a\u6839\u636e\u8d1f\u8f7d\u65f6\u4e0d\u65f6\u8df3\u8fc7\u4f7f\u7528\u5b83\u3002<\/li>\n<\/ul>\n<h1>\u6027\u80fd\u6d4b\u8bd5<\/h1>\n<p> <\/p>\n<p>\u6211\u4eec\u7f16\u8bd1\u4e86 unstable \u7248\u672c\u7684 Redis \u8fdb\u884c\u6027\u80fd\u6d4b\u8bd5\uff0c\u6d4b\u8bd5\u5de5\u5177\u4e3a Redis \u81ea\u5e26\u7684 redis-benchmark\uff0c\u7edf\u8ba1\u8f93\u51fa\u7684 RPS \u503c\u4f5c\u4e3a\u53c2\u8003\u3002<\/p>\n<pre><code>Server \u5b9e\u4f8b: AWS \/ m5.2xlarge \/ 8 vCPU \/ 32 GB Benchmark Client \u5b9e\u4f8b: AWS \/ m5.2xlarge \/ 8 vCPU \/ 32 GB Command: redis-benchmark -h 172.xx.xx.62 -p 6379 -c 100 -d 256 -t get,set -n 10000000 --threads 8 <\/code><\/pre>\n<h2>Threaded I\/O off vs. Threaded I\/O on<\/h2>\n<p>\u6211\u4eec\u5bf9\u6bd4\u4e86\u539f\u6709\u7684\u5355\u7ebf\u7a0b I\/O \u4ee5\u53ca\u5f00\u542f 2 \u7ebf\u7a0b \/4 \u7ebf\u7a0b\u7684 Threaded I\/O \u65f6\u7684\u8868\u73b0\uff0c\u7ed3\u679c\u5982\u56fe\u6240\u793a\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/e51bc0400aae4d55b12e2fcd19e4b694tplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/> \u5728\u5f00\u542f<code>io-threads-do-reads<\/code>\u9009\u9879\u7684\u60c5\u51b5\u4e0b\uff0cThreaded I\/O \u4f5c\u7528\u4e8e\u8bfb\u64cd\u4f5c\uff0c\u4e5f\u80fd\u8ba9\u6027\u80fd\u6709\u8fdb\u4e00\u6b65\u63d0\u5347\uff0c\u4f46\u662f\u6ca1\u6709\u5c06\u5199 I\/O \u7ebf\u7a0b\u5316\u63d0\u5347\u660e\u663e\u3002\u53e6\u5916\u6211\u4eec\u8fd8\u5c1d\u8bd5\u4f7f\u7528\u4e86\u5927\u4f53\u79ef Payload \uff08<code>-d 8192<\/code>\uff09\u8fdb\u884c\u6d4b\u8bd5\uff0c\u5f97\u51fa\u7ed3\u679c\u7684\u63d0\u5347\u767e\u5206\u6bd4\u5e76\u6ca1\u6709\u592a\u5927\u5dee\u5f02\u3002<\/p>\n<h2>Threaded I\/O vs. Redis Cluster<\/h2>\n<p>\u4ee5\u5f80\u5f00\u53d1\u8005\u4f1a\u901a\u8fc7\u5728\u5355\u53f0\u5b9e\u4f8b\u4e0a\u90e8\u7f72 Redis Cluster \u6765\u5c1d\u8bd5\u8ba9 Redis \u4f7f\u7528\u4e0a\u66f4\u591a\u7684 CPU \u8d44\u6e90\uff0c\u6211\u4eec\u4e5f\u5c1d\u8bd5\u5bf9\u6bd4\u4e86\u4e00\u4e0b\u8fd9\u79cd\u60c5\u666f\u4e0b\u7684\u8868\u73b0\u3002 <img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/fb568f67076c40218ecfd7f3c7db1b44tplv-k3u1fbpfcp-zoom-1.image_.png\" alt=\"Redis 6 \u65b0 Feature \u5b9e\u73b0\u539f\u7406\uff1a\u591a\u7ebf\u7a0b IO\" \/> \u5728\u65b0\u7248\u672c\u4e2d\uff0credis-benchmark \u4e5f\u5f97\u5230\u4e86\u66f4\u65b0\uff0c\u5f00\u59cb\u652f\u6301\u5bf9 Redis Cluster \u7684\u6d4b\u8bd5\uff0c\u901a\u8fc7\u5f00\u542f<code>--cluster<\/code>\u53c2\u6570\u5373\u53ef\u68c0\u6d4b\u96c6\u7fa4\u6a21\u5f0f\u548c\u914d\u7f6e\u3002\u6211\u4eec\u5728\u8fd9\u4e00\u7ec4\u5bf9\u6bd4\u6d4b\u8bd5\u4e2d\u770b\u5230\u5355\u5b9e\u4f8b\u6784\u5efa\u96c6\u7fa4\u7684\u5f3a\u5927\u6027\u80fd\uff0c\u5728\u5b9e\u9645\u6d4b\u8bd5\u4e2d\uff0c3 \u4e2a\u8fdb\u7a0b\u7684 CPU \u4f7f\u7528\u7387\u5747\u5728 80%-90%\uff0c\u8bf4\u660e\u4ecd\u6709\u63d0\u5347\u7684\u7a7a\u95f4\u3002\u5f53\u6539\u7528\u6d4b\u8bd5\u53c2\u6570<code>-c 512<\/code>\u65f6\uff0c\u96c6\u7fa4\u80fd\u591f\u8dd1\u51fa\u8d85\u8fc7 40 \u4e07 RPS \u7684\u6210\u7ee9\u3002\u5c3d\u7ba1\u6d4b\u8bd5\u4e0e\u5b9e\u9645\u4f7f\u7528\u4f1a\u6709\u6240\u533a\u522b\uff0c\u5e76\u4e14\u6211\u4eec\u5728\u6784\u5efa\u96c6\u7fa4\u7684\u65f6\u5019\u9009\u62e9\u4e86\u4e0d\u9644\u5e26 Slave\uff0c\u4f46\u662f\u4ecd\u7136\u80fd\u770b\u51fa\u6765\u5728\u51e0\u79cd\u6a21\u578b\u4e2d\uff0c\u6784\u5efa Cluster \u80fd\u771f\u6b63\u4f7f\u7528\u4e0a\u591a\u7ebf\u7a0b\u8fdb\u884c\u7f51\u7edc I\/O \u3001\u547d\u4ee4\u6267\u884c\uff0c\u5bf9\u6027\u80fd\u7684\u63d0\u5347\u4e5f\u662f\u6700\u5927\u7684\u3002<\/p>\n<h1>\u603b\u7ed3\u4e0e\u601d\u8003<\/h1>\n<p> <\/p>\n<p>Redis 6.0 \u5f15\u5165\u7684 Threaded I\/O\uff0c\u5c06 Socket \u8bfb\u5199\u5ef6\u8fdf\u548c\u7ebf\u7a0b\u5316\uff0c\u5728\u7f51\u7edc I\/O \u7684\u65b9\u5411\u4e0a\u7ed9 Redis \u5e26\u6765\u4e86\u4e00\u5b9a\u7684\u6027\u80fd\u63d0\u5347\uff0c\u5e76\u4e14\u4f7f\u7528\u95e8\u69db\u6bd4\u8f83\u4f4e\uff0c\u7528\u6237\u65e0\u9700\u505a\u592a\u591a\u7684\u53d8\u66f4\uff0c\u5373\u53ef\u5728\u4e0d\u5f71\u54cd\u4e1a\u52a1\u7684\u60c5\u51b5\u4e0b\u767d\u5ad6\u7a7a\u95f2\u7684\u7ebf\u7a0b\u8d44\u6e90\u3002<\/p>\n<p>\u53e6\u4e00\u65b9\u9762\uff0c\u4ece\u6d4b\u8bd5\u7ed3\u679c\u4e0a\u770b\uff0c\u8fd9\u90e8\u5206\u7684\u63d0\u5347\u53ef\u80fd\u8fd8\u96be\u4ee5\u8ba9\u5904\u4e8e Redis 5 \u751a\u81f3 Redis 3 \u7248\u672c\u7684\u7528\u6237\u6709\u8db3\u591f\u7684\u52a8\u529b\u8fdb\u884c\u5347\u7ea7\uff0c\u7279\u522b\u662f\u8003\u8651\u5230\u5f88\u591a\u4e1a\u52a1\u573a\u666f\u4e2d Redis \u7684\u6027\u80fd\u5e76\u6ca1\u6709\u5dee\u5230\u6210\u4e3a\u74f6\u9888\uff0c\u800c\u4e14\u65b0\u7248\u672c\u7684\u798f\u5229\u4e5f\u672a\u7ecf\u8fc7\u5927\u89c4\u6a21\u9a8c\u8bc1\uff0c\u52bf\u5fc5\u4f1a\u5f71\u54cd\u5230\u4f01\u4e1a\u7ea7\u5e94\u7528\u4e2d\u66f4\u591a\u7528\u6237\u5173\u6ce8\u7684\u670d\u52a1\u7a33\u5b9a\u6027\u3002\u540c\u65f6\uff0cTIO \u7684\u63d0\u5347\u5bf9\u6bd4\u96c6\u7fa4\u6027\u80fd\u4f3c\u4e4e\u8fd8\u6709\u4e00\u5b9a\u7684\u5dee\u8ddd\uff0c\u8fd9\u53ef\u80fd\u66f4\u52a0\u4f1a\u8ba9\u539f\u672c\u5c31\u5904\u4e8e\u96c6\u7fa4\u67b6\u6784\u7684\u4f01\u4e1a\u7528\u6237\u5ffd\u7565\u8fd9\u4e2a\u529f\u80fd\u3002<\/p>\n<p>\u4f46\u65e0\u8bba\u5982\u4f55\uff0c\u7528\u6237\u80af\u5b9a\u4e50\u4e8e\u89c1\u5230\u66f4\u591a\u7684\u65b0\u529f\u80fd\u3001\u66f4\u591a\u4f18\u5316\u63d0\u5347\u51fa\u73b0\u5728 Redis \u4e0a\u3002\u5728\u4fdd\u6301\u4e00\u8d2f\u7a33\u5b9a\u6027\u7684\u524d\u63d0\u4e0b\uff0c\u672c\u6b21\u7684\u7248\u672c\u53ef\u4ee5\u8bf4\u662f Redis \u4ece\u8bde\u751f\u81f3\u4eca\u6700\u5927\u7684\u66f4\u65b0\uff0c\u4e0d\u53ea\u6709 Threaded I\/O\uff0c\u5305\u62ec RESP3 \u3001ACLs \u548c SSL\uff0c\u6211\u4eec\u671f\u5f85\u8fd9\u4e9b\u65b0 Feature \u80fd\u591f\u5728\u66f4\u591a\u7684\u5e94\u7528\u573a\u666f\u4e0b\u5f97\u5230\u63a8\u5e7f\u3001\u9a8c\u8bc1\u548c\u4f7f\u7528\uff0c\u4e5f\u5e0c\u671b\u672a\u6765\u7684\u7248\u672c\u80fd\u591f\u7ed9\u7528\u6237\u5e26\u6765\u66f4\u591a\u7684\u60ca\u559c\u548c\u66f4\u597d\u7684\u4f53\u9a8c\u3002<\/p>\n<h1>Further Reading: Understanding Redis<\/h1>\n<p> <\/p>\n<p>\u4f5c\u4e3a\u4e00\u4f4d\u4ece\u6765\u6ca1\u6709\u4f7f\u7528\u8fc7 C\/\u7c7b C \u8bed\u8a00\u7684\u5f00\u53d1\u8005\uff0cRedis \u7b80\u6d01\u7684\u4ee3\u7801\u548c\u8be6\u5c3d\u7684\u6ce8\u91ca\u4e3a\u6211\u9605\u8bfb\u548c\u7406\u89e3\u5176\u5b9e\u73b0\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u5e2e\u52a9\u3002\u5728\u6587\u672b\u6211\u60f3\u8981\u5206\u4eab\u4e00\u4e0b\u81ea\u5df1\u5b66\u4e60 Reids \u7684\u4e00\u4e9b\u9014\u5f84\u3001\u5de5\u5177\u548c\u65b9\u6cd5\u3002<\/p>\n<p><code>README.md<\/code>\u5e94\u8be5\u662f\u6211\u4eec\u4e86\u89e3 Redis \u7684\u5165\u53e3\uff0c\u800c\u4e0d\u662f\u5168\u5c40\u641c\u7d22<code>main()<\/code>\u65b9\u6cd5\u3002\u8bf7\u5173\u6ce8<code>Redis internals<\/code>\u5c0f\u8282\u4e0b\u7684\u5185\u5bb9\uff0c\u8fd9\u91cc\u4ecb\u7ecd\u4e86 Redis \u7684\u4ee3\u7801\u7ed3\u6784\uff0cRedis \u6bcf\u4e2a\u6587\u4ef6\u90fd\u662f\u4e00\u4e2a\u201cgeneral idea\u201d\uff0c\u5176\u4e2d<code>server.c<\/code>\u548c<code>network.c<\/code>\u7684\u90e8\u5206\u903b\u8f91\u548c\u4ee3\u7801\u5728\u672c\u6587\u5df2\u7ecf\u4ecb\u7ecd\u8fc7\u4e86\uff0c\u6301\u4e45\u5316\u76f8\u5173\u7684<code>aof.c<\/code>\u548c<code>rdb.c<\/code>\u3001\u6570\u636e\u5e93\u76f8\u5173\u7684<code>db.c<\/code>\u3001Redis \u5bf9\u8c61\u76f8\u5173\u7684<code>object.c<\/code>\u3001\u590d\u5236\u76f8\u5173\u7684<code>replication.c<\/code>\u7b49\u90fd\u503c\u5f97\u7559\u610f\u3002\u5176\u4ed6\u5305\u62ec Redis \u7684\u547d\u4ee4\u662f\u4ee5\u4ec0\u4e48\u6837\u7684\u5f62\u5f0f\u7f16\u7801\u7684\uff0c\u4e5f\u80fd\u5728<code>README.md<\/code>\u4e2d\u627e\u5230\u7b54\u6848\uff0c\u8fd9\u6837\u53ef\u4ee5\u65b9\u4fbf\u6211\u4eec\u8fdb\u4e00\u6b65\u9605\u8bfb\u4ee3\u7801\u65f6\u5feb\u901f\u5b9a\u4f4d\u3002<\/p>\n<p>Documentation \u4e3b\u9875\u548credis-doc repo\u662f Redis \u6587\u6863\u7684\u96c6\u5408\u5904\uff0c\u8bf7\u6ce8\u610f\u540e\u8005\u7684<code>topics<\/code>\u76ee\u5f55\u4e0b\u6709\u975e\u5e38\u591a\u6709\u8da3\u7684\u4e3b\u9898\uff0c\u6211\u5bf9\u201c\u6709\u8da3\u201d\u7684\u5b9a\u4e49\u662f\u50cf\u8fd9\u6837\u7684\u6587\u7ae0\uff1a<\/p>\n<ul>\n<li>Redis Cluster Specification<\/li>\n<li>Redis server-assisted client side caching<\/li>\n<\/ul>\n<p>\u4f5c\u4e3a\u5f00\u53d1\u8005\uff0c\u5728\u6df1\u5165\u5b66\u4e60\u7684\u9636\u6bb5\uff0c\u8fd9\u4e9b\u5185\u5bb9\u80fd\u8ba9\u5927\u5bb6\u4ece\u201c\u4f7f\u7528\u201d\u53d8\u4e3a\u201c\u4e86\u89e3\u201d\uff0c\u7136\u540e\u53d1\u73b0 Redis \u539f\u6765\u80fd\u505a\u66f4\u591a\u7684\u4e8b\u60c5\u3002\u6240\u4ee5\u5982\u679c\u7f3a\u4e4f\u65f6\u95f4\u9605\u8bfb\u548c\u8c03\u8bd5\u6e90\u7801\uff0c\u5c06<code>topics<\/code>\u4e0b\u7684 60 \u591a\u7bc7\u6587\u6863\u770b\u4e00\u904d\uff0c\u5927\u6982\u662f\u4e86\u89e3 Redis \u6700\u5feb\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u6700\u540e\uff0c\u5982\u679c\u4f60\u80fd\u770b\u5230\u8fd9\u91cc\uff0c\u5927\u6982\u4e5f\u4f1a\u5bf9 Redis \u7684\u6e90\u7801\u6709\u90a3\u4e48\u4e00\u70b9\u5174\u8da3\u3002\u56e0\u4e3a\u672c\u8eab\u5e76\u4e0d\u4e86\u89e3 C \u8bed\u8a00\uff0c\u6240\u4ee5\u6211\u5927\u6982\u7387\u4f1a\u9009\u62e9\u501f\u52a9\u4e00\u4e2a IDE\uff0c\u5728<code>main()<\/code>\u6253\u4e0a\u65ad\u70b9\uff0c\u7136\u540e\u6d41\u7a0b\u7684\u8d77\u70b9\u5f00\u59cb\u770b\uff0c\u5b9e\u9645\u4e0a\u6211\u4e5f\u786e\u5b9e\u662f\u8fd9\u4e48\u505a\u7684\u3002\u53e6\u5916\u51e0\u4e2a\u4ee3\u7801\u7684\u5173\u952e\u70b9\uff0c\u5176\u5b9e\u4e5f\u5728\u672c\u6587\u4e2d\u51fa\u73b0\u8fc7\uff1a<\/p>\n<ul>\n<li><code>main()<\/code>\uff0c\u8d77\u70b9<\/li>\n<li><code>initServer()<\/code>\uff0c\u521d\u59cb\u5316<\/li>\n<li><code>aeMain()<\/code>\uff0c\u4e8b\u4ef6\u5faa\u73af<\/li>\n<li><code>readQueryFromClient()<\/code>\uff0c\u8bfb\u4e8b\u4ef6\u7684 Handler<\/li>\n<li><code>processInputBuffer()<\/code>\uff0c\u547d\u4ee4\u5904\u7406\u7684\u5165\u53e3<\/li>\n<\/ul>\n<p>\u5982\u679c\u50cf\u672c\u6587\u4e00\u6837\u60f3\u4e86\u89e3 Network \u7684\u5185\u5bb9\uff0c\u53ef\u4ee5\u5728<code>aeMain()<\/code>\u5904\u6253\u65ad\u70b9\uff0c\u7136\u540e\u5173\u6ce8\u4e2d<code>network.c<\/code>\u4e2d\u7684\u65b9\u6cd5\uff1b\u5982\u679c\u60f3\u5173\u6ce8\u5177\u4f53\u547d\u4ee4\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u53ef\u4ee5\u5728<code>processInputBuffer()<\/code>\u5904\u6253\u65ad\u70b9\uff0c\u7136\u540e\u5173\u6ce8<code>$command.c<\/code>\u6216\u8005\u7c7b\u4f3c\u6587\u4ef6\u4e2d\u7684\u65b9\u6cd5\uff0c<code>README.md<\/code>\u6587\u4ef6\u91cc\u4e5f\u5df2\u7ecf\u4ecb\u7ecd\u8fc7\u547d\u4ee4\u65b9\u6cd5\u7684\u547d\u540d\u683c\u5f0f\uff0c\u5b9a\u4f4d\u975e\u5e38\u5bb9\u6613\u3002\u5176\u4f59\u7ecf\u5e38\u51fa\u73b0\u7684\u5176\u4ed6\u52a8\u4f5c\uff0c\u4f8b\u5982\u6301\u4e45\u5316\u3001\u590d\u5236\u7b49\uff0c\u5927\u6982\u4f1a\u51fa\u73b0\u5728\u547d\u4ee4\u6267\u884c\u7684\u524d\u540e\uff0c\u6216\u8005\u65f6\u95f4\u4e8b\u4ef6\u5185\uff0c\u4e5f\u53ef\u80fd\u5728<code>beforeSleep()<\/code>\u4e2d\u3002<code>server.h<\/code>\u4e2d\u5b9a\u4e49\u7684<code>redisServer<\/code>\u548c<code>client<\/code>\u662f Redis \u4e2d\u4e24\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u7ed3\u6784\uff0c\u5728\u4e1a\u52a1\u4e0a\u5f88\u591a\u5185\u5bb9\u90fd\u662f\u8f6c\u5316\u4e3a\u5bf9\u5b83\u4eec\u7684\u5c5e\u6027\u7684\u76f8\u5173\u64cd\u4f5c\uff0c\u8981\u7279\u522b\u7559\u610f\u3002<\/p>\n<p>\u9664\u6b64\u4ee5\u5916\uff0cAntirez \u66fe\u7ecf\u5728Youtube\u4e0a\u53d1\u5e03\u8fc7\u4e00\u4e9b\u5f00\u53d1\u7684\u5f55\u64ad\u89c6\u9891\uff0cRedisLab\u5219\u6709\u4e00\u4e9b\u76f8\u5bf9\u51b7\u95e8\u4f7f\u7528\u573a\u666f\u7684\u5b9e\u8df5\u4ecb\u7ecd\uff0c\u8fd9\u4e9b\u4f1a\u6bd4\u4e0a\u9762\u7684\u5176\u4ed6\u5b66\u4e60\u6765\u5f97\u66f4\u8f7b\u677e\u4e9b\uff0c\u6700\u5927\u7684\u96be\u5904\u53ef\u80fd\u5c31\u662f\u542c\u61c2\u6f14\u8bb2\u8005\u4eec\u7684\u53e3\u97f3\uff0c\u7279\u522b\u662f Antirez \u672c\u4eba\uff0c\u4e07\u5e78 Youtube \u7684\u5b57\u5e55\u529f\u80fd\u975e\u5e38\u5f3a\u5927\uff0c\u80fd\u89e3\u51b3\u4e0d\u5c11\u9ebb\u70e6\u3002<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>11<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"3618777\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : lidlesseye11 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u62d6\u5230\u6700\u540e\u7adf\u7136\u6ca1\u6709\u516c\u4f17\u53f7\u63a8\u5e7f\uff01\u7231\u4e86\u7231\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618778\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : RedisMasterNode <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @lidlesseye11 hhhh \u5f00\u5934\u6709\u90ae\u7bb1\u4e86 \u6b22\u8fce\u4ea4\u6d41\u5b89\u5229                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618779\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : ooToo <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u5728\u8fbe\u5b9e\u652f\u6301\u4e00\u4e2a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618780\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : ppolanwind <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u60f3\u95ee\u4e00\u4e0b\u6f14\u793a\u6587\u7a3f\u662f\u600e\u4e48\u5236\u4f5c\u7684\uff0c\u770b\u8d77\u6765\u5f88\u6e05\u723d\uff0c\u989c\u503c\u5f88\u9ad8                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618781\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : RedisMasterNode <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @ppolanwind \u5982\u679c\u4f60\u8bf4\u7684\u662f\u56fe\u7247\u7684\u8bdd \u7528 sketch \u753b\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618782\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : mightofcode <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u592a\u957f\u4e86 \u6709\u5927\u4f6c\u603b\u7ed3\u4e0b\u4e48                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618783\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : RedisMasterNode <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @mightofcode \u54c8\u54c8\uff0c\u90a3<\/p>\n<p>Redis \u7684 ieda \u662f\u628a\u63a5\u6536\u5230\u7684\u4e8b\u4ef6\u90fd\u5ef6\u8fdf\u8fdb\u884c\u5904\u7406\uff0c\u6bd4\u5982\u79ef\u7d2f\u4e86\u4e00\u5806\u8bfb\u4e8b\u4ef6\uff08\u7528\u6237\u53d1\u547d\u4ee4\u8fc7\u6765\uff09\uff0c\u5ef6\u8fdf\u4e4b\u540e\u7528\u591a\u7ebf\u7a0b\u8bfb\u53d6\uff0c\u7136\u540e\u5355\u7ebf\u7a0b\u987a\u5e8f\u6267\u884c\uff1b\u5199\u4e5f\u662f\u4e00\u6837\uff0c\u628a\u5f88\u591a\u4e2a\u5df2\u7ecf\u51c6\u5907\u597d\u56de\u590d\u5185\u5bb9\u7684\u8fde\u63a5\u7d2f\u79ef\u8d77\u6765\uff0c\u665a\u4e00\u70b9\u518d\u7528\u591a\u7ebf\u7a0b\u5199\u7ed9\u5404\u4e2a client                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618784\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : ppolanwind <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @RedisMasterNode \u611f\u8c22\u5206\u4eab                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618785\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : putaozhenhaochi <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u5927\u4f6c                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618786\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : E1n <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u5389\u5bb3                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"3618787\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : qq960826 <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u5367\u69fd\u5c45\u7136\u8fd8\u80fd\u78b0\u5230\u6211\u4eec\u516c\u53f8\u7684\u5927\u4f6c                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>Redis 6 \u65b0 Feature&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/164875"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=164875"}],"version-history":[{"count":1,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/164875\/revisions"}],"predecessor-version":[{"id":164887,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/164875\/revisions\/164887"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=164875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=164875"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=164875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}