{"id":69002,"date":"2026-01-31T00:24:47","date_gmt":"2026-01-30T16:24:47","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/69002.html"},"modified":"2026-01-31T00:24:47","modified_gmt":"2026-01-30T16:24:47","slug":"%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%ef%bc%9aredis-redlock%e3%80%81zookeeper%e4%b8%b4%e6%97%b6%e8%8a%82%e7%82%b9%e3%80%81%e6%95%b0%e6%8d%ae%e5%ba%93%e6%82%b2%e8%a7%82%e9%94%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/69002.html","title":{"rendered":"\u5206\u5e03\u5f0f\u9501\uff1aRedis RedLock\u3001Zookeeper\u4e34\u65f6\u8282\u70b9\u3001\u6570\u636e\u5e93\u60b2\u89c2\u9501"},"content":{"rendered":"<p>\u57fa\u4e8e 2025 \u5e74\u5206\u5e03\u5f0f\u7cfb\u7edf\u6700\u4f73\u5b9e\u8df5&#xff0c;\u4ee5\u4e0b\u4ece\u539f\u7406\u3001\u5b9e\u73b0\u5230\u751f\u4ea7\u9009\u578b&#xff0c;\u6df1\u5ea6\u89e3\u6790\u4e09\u79cd\u4e3b\u6d41\u5206\u5e03\u5f0f\u9501\u65b9\u6848&#xff1a;<\/p>\n<hr \/>\n<h3>\u4e00\u3001Redis RedLock&#xff1a;\u591a\u4e3b\u8282\u70b9\u7684\u5b89\u5168\u6027\u535a\u5f08<\/h3>\n<p>RedLock \u662f Redis \u4f5c\u8005 antirez \u63d0\u51fa\u7684\u591a\u8282\u70b9\u5206\u5e03\u5f0f\u9501\u7b97\u6cd5&#xff0c;\u65e8\u5728\u89e3\u51b3\u5355\u70b9 Redis \u7684\u6545\u969c\u5b89\u5168\u95ee\u9898&#xff0c;\u4f46\u5176\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u793e\u533a\u5b58\u5728\u8f83\u5927\u4e89\u8bae\u3002<\/p>\n<h4>1. \u6838\u5fc3\u7b97\u6cd5\u539f\u7406<\/h4>\n<p>RedLock \u8981\u6c42\u5728\u591a\u4e2a\u72ec\u7acb Redis \u4e3b\u8282\u70b9&#xff08;\u901a\u5e38 5 \u4e2a&#xff09;\u4e0a\u540c\u65f6\u83b7\u53d6\u9501&#xff0c;\u901a\u8fc7\u591a\u6570\u6d3e\u673a\u5236\u4fdd\u8bc1\u5b89\u5168\u6027&#xff1a;<\/p>\n<p>\u83b7\u53d6\u9501\u6d41\u7a0b&#xff1a;<\/p>\n<li>\u8bb0\u5f55\u5f00\u59cb\u65f6\u95f4&#xff1a;\u83b7\u53d6\u5f53\u524d\u6beb\u79d2\u7ea7\u65f6\u95f4\u6233 T1<\/li>\n<li>\u4f9d\u6b21\u52a0\u9501&#xff1a;\u5411 N \u4e2a Redis \u8282\u70b9\u53d1\u9001 SET key value NX PX 30000&#xff08;\u539f\u5b50\u6027\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4&#xff09;<\/li>\n<li>\u8ba1\u7b97\u8017\u65f6&#xff1a;\u83b7\u53d6\u5f53\u524d\u65f6\u95f4 T2&#xff0c;\u603b\u8017\u65f6 T2 &#8211; T1<\/li>\n<li>\u6210\u529f\u5224\u5b9a&#xff1a;\u82e5\u5927\u591a\u6570\u8282\u70b9&#xff08;N\/2&#043;1&#xff09;\u52a0\u9501\u6210\u529f&#xff0c;\u4e14\u603b\u8017\u65f6 &lt; \u9501\u8fc7\u671f\u65f6\u95f4&#xff0c;\u5219\u83b7\u53d6\u6210\u529f<\/li>\n<li>\u9501\u8fc7\u671f\u65f6\u95f4&#xff1a;\u5b9e\u9645\u6709\u6548\u65f6\u95f4 &#061; \u521d\u59cb\u8fc7\u671f\u65f6\u95f4 &#8211; \u83b7\u53d6\u8017\u65f6<\/li>\n<p>\u91ca\u653e\u9501\u6d41\u7a0b&#xff1a;<\/p>\n<ul>\n<li>\u5411\u6240\u6709\u8282\u70b9\u53d1\u9001 Lua \u811a\u672c\u5220\u9664\u9501&#xff08;\u6821\u9a8c value \u9632\u6b62\u8bef\u5220&#xff09;<\/li>\n<\/ul>\n<p><span class=\"token comment\">\/\/ RedLock \u4f2a\u4ee3\u7801\u5b9e\u73b0<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">tryLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> resource<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> value<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> expireTime<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> quorum <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">N<\/span> <span class=\"token operator\">\/<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u591a\u6570\u6d3e\u9608\u503c<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> successCount <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">long<\/span> startTime <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">currentTimeMillis<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">RedisNode<\/span> node <span class=\"token operator\">:<\/span> redisNodes<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>node<span class=\"token punctuation\">.<\/span><span class=\"token function\">set<\/span><span class=\"token punctuation\">(<\/span>resource<span class=\"token punctuation\">,<\/span> value<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;NX&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;PX&#034;<\/span><span class=\"token punctuation\">,<\/span> expireTime<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            successCount<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">long<\/span> elapsed <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">currentTimeMillis<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> startTime<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u5927\u591a\u6570\u6210\u529f\u4e14\u672a\u8d85\u65f6<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> successCount <span class=\"token operator\">&gt;&#061;<\/span> quorum <span class=\"token operator\">&amp;&amp;<\/span> elapsed <span class=\"token operator\">&lt;<\/span> expireTime<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2. \u4e89\u8bae\u4e0e\u7f3a\u9677<\/h4>\n<p>Martin Kleppmann \u7684\u8d28\u7591&#xff08;\u300aHow to do distributed locking\u300b&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\u65f6\u949f\u6f02\u79fb&#xff1a;\u82e5 Redis \u8282\u70b9\u65f6\u949f\u4e0d\u540c\u6b65&#xff0c;\u53ef\u80fd\u5bfc\u81f4\u9501\u63d0\u524d\u8fc7\u671f&#xff0c;\u51fa\u73b0\u53cc\u4e3b\u95ee\u9898<\/li>\n<li>GC \u505c\u987f&#xff1a;\u5ba2\u6237\u7aef\u83b7\u53d6\u9501\u540e\u82e5\u53d1\u751f GC \u505c\u987f&#xff0c;\u9501\u5df2\u8fc7\u671f\u4f46\u5ba2\u6237\u7aef\u4e0d\u77e5\u60c5&#xff0c;\u7ee7\u7eed\u64cd\u4f5c\u5bfc\u81f4\u5e76\u53d1\u95ee\u9898<\/li>\n<li>\u7f51\u7edc\u5ef6\u8fdf&#xff1a;\u83b7\u53d6\u9501\u8fc7\u7a0b\u4e2d\u82e5\u7f51\u7edc\u6296\u52a8&#xff0c;\u53ef\u80fd\u5bfc\u81f4\u65f6\u95f4\u8ba1\u7b97\u4e0d\u51c6\u786e<\/li>\n<\/ul>\n<p>Redis \u4f5c\u8005\u7684\u8fa9\u62a4&#xff1a;<\/p>\n<ul>\n<li>\u901a\u8fc7\u5ef6\u8fdf\u542f\u52a8&#xff08;delay start&#xff09;\u907f\u514d\u65f6\u949f\u6f02\u79fb<\/li>\n<li>\u627f\u8ba4 RedLock \u975e\u7edd\u5bf9\u5b89\u5168&#xff0c;\u4f46\u5728\u5927\u591a\u6570\u573a\u666f\u4e0b\u8db3\u591f\u5b89\u5168<\/li>\n<\/ul>\n<h4>3. \u751f\u4ea7\u5efa\u8bae<\/h4>\n<table>\n<tr>\u7ef4\u5ea6\u8bc4\u4ef7<\/tr>\n<tbody>\n<tr>\n<td>\u9002\u7528\u573a\u666f<\/td>\n<td>\u5bf9\u6027\u80fd\u8981\u6c42\u6781\u9ad8\u3001\u53ef\u63a5\u53d7\u6781\u4f4e\u6982\u7387\u5e76\u53d1\u95ee\u9898\u7684\u573a\u666f&#xff08;\u5982\u7f13\u5b58\u91cd\u5efa&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u4e0d\u63a8\u8350\u573a\u666f<\/td>\n<td>\u91d1\u878d\u4ea4\u6613\u3001\u5e93\u5b58\u6263\u51cf\u7b49\u5f3a\u4e00\u81f4\u6027\u8981\u6c42\u573a\u666f<\/td>\n<\/tr>\n<tr>\n<td>\u66ff\u4ee3\u65b9\u6848<\/td>\n<td>\u4f7f\u7528 Redis \u5355\u8282\u70b9 &#043; Lua \u811a\u672c&#xff08;Redisson&#xff09;&#xff0c;\u6216 Zookeeper<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u4e8c\u3001Zookeeper \u4e34\u65f6\u8282\u70b9&#xff1a;CP \u7cfb\u7edf\u7684\u5f3a\u4e00\u81f4\u6027\u9501<\/h3>\n<p>Zookeeper \u901a\u8fc7\u4e34\u65f6\u987a\u5e8f\u8282\u70b9&#xff08;EPHEMERAL_SEQUENTIAL&#xff09; &#043; Watcher \u673a\u5236\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501&#xff0c;\u662f\u5f3a\u4e00\u81f4\u6027\u573a\u666f\u7684\u9996\u9009\u3002<\/p>\n<h4>1. \u6838\u5fc3\u5b9e\u73b0\u673a\u5236<\/h4>\n<p>\u9501\u7ed3\u6784\u8bbe\u8ba1&#xff1a;<\/p>\n<ul>\n<li>\u4e3a\u6bcf\u4e2a\u9501\u521b\u5efa\u6301\u4e45\u8282\u70b9&#xff08;\u5982 \/locks\/order_lock&#xff09;<\/li>\n<li>\u5ba2\u6237\u7aef\u5728\u9501\u8282\u70b9\u4e0b\u521b\u5efa\u4e34\u65f6\u987a\u5e8f\u5b50\u8282\u70b9&#xff08;\u5982 \/locks\/order_lock\/lock-00000001&#xff09;<\/li>\n<\/ul>\n<p>\u83b7\u53d6\u9501\u6d41\u7a0b&#xff1a;<\/p>\n<li>\u521b\u5efa\u8282\u70b9&#xff1a;\u5ba2\u6237\u7aef\u521b\u5efa\u4e34\u65f6\u987a\u5e8f\u8282\u70b9&#xff0c;\u83b7\u53d6\u5e8f\u53f7<\/li>\n<li>\u68c0\u67e5\u5e8f\u53f7&#xff1a;\u82e5\u5f53\u524d\u8282\u70b9\u662f\u6700\u5c0f\u5e8f\u53f7&#xff0c;\u5219\u83b7\u53d6\u9501\u6210\u529f<\/li>\n<li>\u76d1\u542c\u7b49\u5f85&#xff1a;\u82e5\u975e\u6700\u5c0f\u5e8f\u53f7&#xff0c;\u5219\u5bf9\u524d\u4e00\u4e2a\u8282\u70b9\u6ce8\u518c Watcher \u76d1\u542c<\/li>\n<li>\u963b\u585e\u5524\u9192&#xff1a;\u524d\u4e00\u4e2a\u8282\u70b9\u5220\u9664\u65f6&#xff0c;Watcher \u89e6\u53d1&#xff0c;\u5ba2\u6237\u7aef\u91cd\u65b0\u68c0\u67e5\u5e8f\u53f7<\/li>\n<p>\u91ca\u653e\u9501\u6d41\u7a0b&#xff1a;<\/p>\n<ul>\n<li>\u6b63\u5e38\u91ca\u653e&#xff1a;\u5ba2\u6237\u7aef\u4e3b\u52a8\u5220\u9664\u8282\u70b9<\/li>\n<li>\u5f02\u5e38\u91ca\u653e&#xff1a;\u5ba2\u6237\u7aef\u4f1a\u8bdd\u65ad\u5f00&#xff08;Session Timeout&#xff09;&#xff0c;Zookeeper \u81ea\u52a8\u5220\u9664\u4e34\u65f6\u8282\u70b9<\/li>\n<\/ul>\n<p><span class=\"token comment\">\/\/ Curator \u6846\u67b6\u5b9e\u73b0&#xff08;\u751f\u4ea7\u63a8\u8350&#xff09;<\/span><br \/>\n<span class=\"token class-name\">InterProcessMutex<\/span> lock <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">InterProcessMutex<\/span><span class=\"token punctuation\">(<\/span>client<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\/locks\/order_lock&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">acquire<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">TimeUnit<\/span><span class=\"token punctuation\">.<\/span>SECONDS<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6267\u884c\u4e1a\u52a1\u903b\u8f91<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">finally<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    lock<span class=\"token punctuation\">.<\/span><span class=\"token function\">release<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u786e\u4fdd\u91ca\u653e<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>Zookeeper \u539f\u751f\u5b9e\u73b0&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ZkDistributedLock<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> lockPath<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">String<\/span> currentNode<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ 1. \u521b\u5efa\u4e34\u65f6\u987a\u5e8f\u8282\u70b9<\/span><br \/>\n        currentNode <span class=\"token operator\">&#061;<\/span> zk<span class=\"token punctuation\">.<\/span><span class=\"token function\">create<\/span><span class=\"token punctuation\">(<\/span>lockPath <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\/lock-&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            data<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">ZooDefs<span class=\"token punctuation\">.<\/span>Ids<\/span><span class=\"token punctuation\">.<\/span>OPEN_ACL_UNSAFE<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token class-name\">CreateMode<\/span><span class=\"token punctuation\">.<\/span>EPHEMERAL_SEQUENTIAL<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 2. \u83b7\u53d6\u6240\u6709\u5b50\u8282\u70b9\u5e76\u6392\u5e8f<\/span><br \/>\n        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> children <span class=\"token operator\">&#061;<\/span> zk<span class=\"token punctuation\">.<\/span><span class=\"token function\">getChildren<\/span><span class=\"token punctuation\">(<\/span>lockPath<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Collections<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>children<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 3. \u5224\u65ad\u662f\u5426\u6700\u5c0f\u8282\u70b9<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>currentNode<span class=\"token punctuation\">.<\/span><span class=\"token function\">endsWith<\/span><span class=\"token punctuation\">(<\/span>children<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u83b7\u53d6\u9501\u6210\u529f<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 4. \u76d1\u542c\u524d\u4e00\u4e2a\u8282\u70b9<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> prevNode <span class=\"token operator\">&#061;<\/span> children<span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>children<span class=\"token punctuation\">.<\/span><span class=\"token function\">indexOf<\/span><span class=\"token punctuation\">(<\/span>currentNode<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">CountDownLatch<\/span> latch <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">CountDownLatch<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        zk<span class=\"token punctuation\">.<\/span><span class=\"token function\">exists<\/span><span class=\"token punctuation\">(<\/span>lockPath <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;\/&#034;<\/span> <span class=\"token operator\">&#043;<\/span> prevNode<span class=\"token punctuation\">,<\/span> event <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>event<span class=\"token punctuation\">.<\/span><span class=\"token function\">getType<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token class-name\">Event<span class=\"token punctuation\">.<\/span>EventType<span class=\"token punctuation\">.<\/span>NodeDeleted<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                latch<span class=\"token punctuation\">.<\/span><span class=\"token function\">countDown<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        latch<span class=\"token punctuation\">.<\/span><span class=\"token function\">await<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u963b\u585e\u7b49\u5f85<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2. \u6838\u5fc3\u4f18\u52bf<\/h4>\n<table>\n<tr>\u4f18\u52bf\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>\u81ea\u52a8\u91ca\u653e<\/td>\n<td>\u5ba2\u6237\u7aef\u5d29\u6e83\u6216\u7f51\u7edc\u65ad\u5f00&#xff0c;Session \u8d85\u65f6\u540e\u81ea\u52a8\u5220\u9664\u8282\u70b9&#xff0c;\u65e0\u6b7b\u9501<\/td>\n<\/tr>\n<tr>\n<td>\u5f3a\u4e00\u81f4\u6027<\/td>\n<td>Zookeeper \u4fdd\u8bc1\u987a\u5e8f\u4e00\u81f4\u6027&#xff0c;\u9501\u83b7\u53d6\u987a\u5e8f\u4e25\u683c\u6709\u5e8f<\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u91cd\u5165<\/td>\n<td>\u540c\u4e00\u7ebf\u7a0b\u53ef\u591a\u6b21\u83b7\u53d6\u9501&#xff08;\u9700\u8bb0\u5f55\u7ebf\u7a0b\u6807\u8bc6&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u76d1\u542c\u673a\u5236<\/td>\n<td>\u975e\u8f6e\u8be2\u7b49\u5f85&#xff0c;\u4e8b\u4ef6\u9a71\u52a8\u5524\u9192&#xff0c;\u6027\u80fd\u4f18\u4e8e Redis \u7684\u5fd9\u7b49<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>3. \u5c40\u9650\u6027\u4e0e\u4f18\u5316<\/h4>\n<p>\u6027\u80fd\u74f6\u9888&#xff1a;<\/p>\n<ul>\n<li>\u5199\u64cd\u4f5c\u9650\u5236&#xff1a;Zookeeper \u5355\u8282\u70b9\u5199\u6027\u80fd\u7ea6 10K TPS&#xff0c;\u4f4e\u4e8e Redis \u7684 100K&#043;<\/li>\n<li>\u7f8a\u7fa4\u6548\u5e94&#xff1a;\u9501\u91ca\u653e\u65f6&#xff0c;\u6240\u6709\u7b49\u5f85\u5ba2\u6237\u7aef\u540c\u65f6\u88ab\u5524\u9192&#xff0c;\u77ac\u95f4\u6d41\u91cf\u51b2\u51fb<\/li>\n<\/ul>\n<p>\u4f18\u5316\u65b9\u6848&#xff1a;<\/p>\n<ul>\n<li>\u987a\u5e8f\u76d1\u542c&#xff1a;\u4ec5\u76d1\u542c\u524d\u4e00\u4e2a\u8282\u70b9&#xff0c;\u800c\u975e\u6240\u6709\u8282\u70b9&#xff08;\u5df2\u5728\u4e0a\u6587\u5b9e\u73b0&#xff09;<\/li>\n<li>\u672c\u5730\u7f13\u5b58&#xff1a;Curator \u6846\u67b6\u7f13\u5b58\u8282\u70b9\u5217\u8868&#xff0c;\u51cf\u5c11 Zookeeper \u8bfb\u538b\u529b<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e09\u3001\u6570\u636e\u5e93\u60b2\u89c2\u9501&#xff1a;\u7b80\u5355\u53ef\u9760\u7684\u515c\u5e95\u65b9\u6848<\/h3>\n<p>\u5229\u7528\u6570\u636e\u5e93\u7684\u884c\u7ea7\u6392\u4ed6\u9501&#xff08;\u5982 MySQL SELECT &#8230; FOR UPDATE&#xff09;\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501&#xff0c;\u9002\u5408\u4f4e\u5e76\u53d1\u6216\u5df2\u6709\u6570\u636e\u5e93\u7684\u573a\u666f\u3002<\/p>\n<h4>1. \u5b9e\u73b0\u65b9\u5f0f<\/h4>\n<p>\u65b9\u5f0f\u4e00&#xff1a;\u552f\u4e00\u7ea6\u675f&#xff08;Insert \u9501&#xff09;&#xff1a;<\/p>\n<p><span class=\"token comment\">&#8212; \u9501\u8868\u7ed3\u6784<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> distributed_lock <span class=\"token punctuation\">(<\/span><br \/>\n    lock_name <span class=\"token keyword\">VARCHAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">64<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">PRIMARY<\/span> <span class=\"token keyword\">KEY<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    lock_value <span class=\"token keyword\">VARCHAR<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">255<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    expire_time <span class=\"token keyword\">TIMESTAMP<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token keyword\">UNIQUE<\/span> <span class=\"token keyword\">KEY<\/span> uk_lock_name <span class=\"token punctuation\">(<\/span>lock_name<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">&#8212; \u83b7\u53d6\u9501&#xff08;\u63d2\u5165\u6210\u529f\u5373\u83b7\u5f97&#xff09;<\/span><br \/>\n<span class=\"token keyword\">INSERT<\/span> <span class=\"token keyword\">INTO<\/span> distributed_lock <span class=\"token punctuation\">(<\/span>lock_name<span class=\"token punctuation\">,<\/span> lock_value<span class=\"token punctuation\">,<\/span> expire_time<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">VALUES<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;order_lock&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;uuid&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">NOW<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token keyword\">INTERVAL<\/span> <span class=\"token number\">30<\/span> <span class=\"token keyword\">SECOND<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">&#8212; \u91ca\u653e\u9501<\/span><br \/>\n<span class=\"token keyword\">DELETE<\/span> <span class=\"token keyword\">FROM<\/span> distributed_lock <span class=\"token keyword\">WHERE<\/span> lock_name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;order_lock&#039;<\/span> <span class=\"token operator\">AND<\/span> lock_value <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;uuid&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u65b9\u5f0f\u4e8c&#xff1a;\u884c\u7ea7\u9501&#xff08;For Update&#xff09;&#xff1a;<\/p>\n<p><span class=\"token comment\">&#8212; \u9884\u5148\u63d2\u5165\u9501\u8bb0\u5f55<\/span><br \/>\n<span class=\"token keyword\">INSERT<\/span> <span class=\"token keyword\">INTO<\/span> distributed_lock <span class=\"token punctuation\">(<\/span>lock_name<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">VALUES<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;order_lock&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">&#8212; \u83b7\u53d6\u9501&#xff08;\u5f00\u542f\u4e8b\u52a1&#xff09;<\/span><br \/>\n<span class=\"token keyword\">BEGIN<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">SELECT<\/span> <span class=\"token operator\">*<\/span> <span class=\"token keyword\">FROM<\/span> distributed_lock<br \/>\n<span class=\"token keyword\">WHERE<\/span> lock_name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;order_lock&#039;<\/span><br \/>\n<span class=\"token keyword\">FOR<\/span> <span class=\"token keyword\">UPDATE<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">&#8212; \u6392\u4ed6\u9501<\/span><\/p>\n<p><span class=\"token comment\">&#8212; \u6267\u884c\u4e1a\u52a1\u903b\u8f91&#8230;<\/span><\/p>\n<p><span class=\"token keyword\">COMMIT<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">&#8212; \u63d0\u4ea4\u540e\u81ea\u52a8\u91ca\u653e\u9501<\/span><\/p>\n<p>Java \u5b9e\u73b0&#xff1a;<\/p>\n<p><span class=\"token annotation punctuation\">&#064;Transactional<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">tryLock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> lockName<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> value<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5c1d\u8bd5\u83b7\u53d6\u9501&#xff0c;\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> jdbcTemplate<span class=\"token punctuation\">.<\/span><span class=\"token function\">update<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token string\">&#034;UPDATE distributed_lock SET lock_value &#061; ?, expire_time &#061; DATE_ADD(NOW(), INTERVAL 30 SECOND) &#034;<\/span> <span class=\"token operator\">&#043;<\/span><br \/>\n            <span class=\"token string\">&#034;WHERE lock_name &#061; ? AND (expire_time &lt; NOW() OR lock_value IS NULL)&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            value<span class=\"token punctuation\">,<\/span> lockName<br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> count <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2. \u4f18\u7f3a\u70b9\u5206\u6790<\/h4>\n<table>\n<tr>\u7ef4\u5ea6\u8bc4\u4ef7<\/tr>\n<tbody>\n<tr>\n<td>\u4f18\u70b9<\/td>\n<td>\u5b9e\u73b0\u7b80\u5355\u3001\u65e0\u9700\u5f15\u5165\u65b0\u7ec4\u4ef6\u3001\u6613\u4e8e\u7406\u89e3<\/td>\n<\/tr>\n<tr>\n<td>\u7f3a\u70b9<\/td>\n<td>\u6027\u80fd\u5dee&#xff08;\u6570\u636e\u5e93\u8fde\u63a5\u6210\u672c\u9ad8&#xff09;\u3001\u5355\u70b9\u6545\u969c&#xff08;\u6570\u636e\u5e93\u6302\u5219\u9501\u5931\u6548&#xff09;\u3001\u6b7b\u9501\u98ce\u9669&#xff08;\u4e8b\u52a1\u672a\u63d0\u4ea4\u5219\u9501\u4e0d\u91ca\u653e&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u9002\u7528\u573a\u666f<\/td>\n<td>\u5e76\u53d1\u91cf &lt; 100 QPS\u3001\u5df2\u6709\u6570\u636e\u5e93\u57fa\u7840\u8bbe\u65bd\u3001\u975e\u6838\u5fc3\u94fe\u8def<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>3. \u751f\u4ea7\u4f18\u5316<\/h4>\n<p>\u907f\u514d\u5355\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528\u4e3b\u4ece\u67b6\u6784&#xff0c;\u4f46\u9700\u6ce8\u610f\u4e3b\u4ece\u5ef6\u8fdf\u5bfc\u81f4\u9501\u5931\u6548<\/li>\n<li>\u6216\u91c7\u7528\u591a\u6570\u636e\u5e93\u5206\u7247&#xff08;\u5982\u6309 lock_name hash \u5230\u4e0d\u540c\u5e93&#xff09;<\/li>\n<\/ul>\n<p>\u6b7b\u9501\u9884\u9632&#xff1a;<\/p>\n<ul>\n<li>\u8bbe\u7f6e\u9501\u8d85\u65f6\u65f6\u95f4&#xff08;\u5982 30 \u79d2&#xff09;&#xff0c;\u901a\u8fc7\u5b9a\u65f6\u4efb\u52a1\u6e05\u7406\u8fc7\u671f\u9501<\/li>\n<li>\u4e1a\u52a1\u903b\u8f91\u5fc5\u987b\u5305\u88f9\u5728\u4e8b\u52a1\u4e2d&#xff0c;\u786e\u4fdd\u9501\u53ca\u65f6\u91ca\u653e<\/li>\n<\/ul>\n<hr \/>\n<h3>\u56db\u3001\u4e09\u79cd\u65b9\u6848\u5bf9\u6bd4\u4e0e\u9009\u578b<\/h3>\n<table>\n<tr>\u7ef4\u5ea6Redis RedLockZookeeper \u4e34\u65f6\u8282\u70b9\u6570\u636e\u5e93\u60b2\u89c2\u9501<\/tr>\n<tbody>\n<tr>\n<td>\u4e00\u81f4\u6027<\/td>\n<td>\u6700\u7ec8\u4e00\u81f4&#xff08;\u5b58\u5728\u4e89\u8bae&#xff09;<\/td>\n<td>\u5f3a\u4e00\u81f4&#xff08;CP&#xff09;<\/td>\n<td>\u5f3a\u4e00\u81f4&#xff08;\u4f46\u4f9d\u8d56 DB \u53ef\u7528\u6027&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u6027\u80fd<\/td>\n<td>\u6781\u9ad8&#xff08;10\u4e07&#043; QPS&#xff09;<\/td>\n<td>\u4e2d\u7b49&#xff08;1\u4e07 QPS&#xff09;<\/td>\n<td>\u4f4e&#xff08;&lt;1000 QPS&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u9760\u6027<\/td>\n<td>\u4e2d&#xff08;\u65f6\u949f\u6f02\u79fb\u3001GC \u98ce\u9669&#xff09;<\/td>\n<td>\u9ad8&#xff08;\u81ea\u52a8\u91ca\u653e\u3001\u65e0\u6b7b\u9501&#xff09;<\/td>\n<td>\u4e2d&#xff08;DB \u5355\u70b9\u3001\u8fde\u63a5\u6c60\u8017\u5c3d&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u5b9e\u73b0\u590d\u6742\u5ea6<\/td>\n<td>\u9ad8&#xff08;\u591a\u8282\u70b9\u8fd0\u7ef4&#xff09;<\/td>\n<td>\u4e2d&#xff08;Curator \u5c01\u88c5\u540e\u7b80\u5355&#xff09;<\/td>\n<td>\u4f4e&#xff08;SQL \u5373\u53ef&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u81ea\u52a8\u91ca\u653e<\/td>\n<td>\u4f9d\u8d56\u8fc7\u671f\u65f6\u95f4&#xff08;\u53ef\u80fd\u4e0d\u51c6&#xff09;<\/td>\n<td>\u4f1a\u8bdd\u65ad\u5f00\u81ea\u52a8\u91ca\u653e<\/td>\n<td>\u4f9d\u8d56\u4e8b\u52a1\u63d0\u4ea4<\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u91cd\u5165<\/td>\n<td>\u9700\u81ea\u884c\u5b9e\u73b0<\/td>\n<td>Curator \u652f\u6301<\/td>\n<td>\u9700\u81ea\u884c\u5b9e\u73b0<\/td>\n<\/tr>\n<tr>\n<td>\u9002\u7528\u573a\u666f<\/td>\n<td>\u9ad8\u5e76\u53d1\u7f13\u5b58\u3001\u9650\u6d41<\/td>\n<td>\u5206\u5e03\u5f0f\u534f\u8c03\u3001Leader \u9009\u4e3e<\/td>\n<td>\u4f4e\u9891\u4efb\u52a1\u3001\u5df2\u6709 DB \u573a\u666f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>\u9009\u578b\u51b3\u7b56\u6811<\/h4>\n<p>\u662f\u5426\u9700\u8981\u5f3a\u4e00\u81f4\u6027&#xff1f;<br \/>\n\u251c\u2500\u2500 \u662f \u2192 \u5e76\u53d1\u91cf\u662f\u5426\u9ad8&#xff1f;<br \/>\n\u2502   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