{"id":6724,"date":"2018-09-21T08:58:24","date_gmt":"2018-09-21T00:58:24","guid":{"rendered":"https:\/\/kyle.ai\/blog\/?p=6724"},"modified":"2019-06-12T10:33:36","modified_gmt":"2019-06-12T02:33:36","slug":"redis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/kyle.ai\/blog\/6724.html","title":{"rendered":"Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u539f\u7406"},"content":{"rendered":"<p>\u5728\u516c\u53f8\u5185\u505a\u7684\u6280\u672f\u6c99\u9f99\uff0c\u5199\u7684PPT\u3002<\/p>\n<p><a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72471.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6725\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72471.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72472.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6726\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72472.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72473.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6727\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72473.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72474.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6728\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72474.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72475.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6729\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72475.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72476.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6730\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72476.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72477.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6731\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72477.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72478.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6732\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72478.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72479.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6733\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u72479.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u724710.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6734\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u724710.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u724711.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6735\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u724711.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a> <a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u724712.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6736\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/\u5e7b\u706f\u724712.png\" alt=\"\" width=\"1280\" height=\"720\" \/><\/a><\/p>\n<h3><a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501-kyle.pptx\">Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501 &#8211; kyle<\/a><\/h3>\n<h3>\u53c2\u8003\u94fe\u63a5\uff1a<\/h3>\n<ul>\n<li><a href=\"https:\/\/redis.io\/commands\/setnx\">Redis SETNX<\/a><\/li>\n<li><a href=\"https:\/\/redis.io\/topics\/distlock\">Distributed locks with Redis<\/a><\/li>\n<li><a href=\"https:\/\/martin.kleppmann.com\/2016\/02\/08\/how-to-do-distributed-locking.html\">How to do distributed locking<\/a><\/li>\n<li><a href=\"http:\/\/antirez.com\/news\/101\">Is Redlock safe?<\/a><\/li>\n<li><a href=\"http:\/\/zhangtielei.com\/posts\/blog-redlock-reasoning.html\">\u57fa\u4e8eRedis\u7684\u5206\u5e03\u5f0f\u9501\u5230\u5e95\u5b89\u5168\u5417<\/a><\/li>\n<\/ul>\n<h3>\u4ee5\u4e0b\u5185\u5bb9\u8f6c\u8f7d\u81ea\uff1ahttp:\/\/zhangtielei.com\/posts\/blog-redlock-reasoning.html<\/h3>\n<hr \/>\n<p>\u7f51\u4e0a\u6709\u5173Redis\u5206\u5e03\u5f0f\u9501\u7684\u6587\u7ae0\u53ef\u8c13\u591a\u5982\u725b\u6bdb\u4e86\uff0c\u4e0d\u4fe1\u7684\u8bdd\u4f60\u53ef\u4ee5\u62ff\u5173\u952e\u8bcd\u201cRedis \u5206\u5e03\u5f0f\u9501\u201d\u968f\u4fbf\u5230\u54ea\u4e2a\u641c\u7d22\u5f15\u64ce\u4e0a\u53bb\u641c\u7d22\u4e00\u4e0b\u5c31\u77e5\u9053\u4e86\u3002\u8fd9\u4e9b\u6587\u7ae0\u7684\u601d\u8def\u5927\u4f53\u76f8\u8fd1\uff0c\u7ed9\u51fa\u7684\u5b9e\u73b0\u7b97\u6cd5\u4e5f\u770b\u4f3c\u5408\u4e4e\u903b\u8f91\uff0c\u4f46\u5f53\u6211\u4eec\u7740\u624b\u53bb\u5b9e\u73b0\u5b83\u4eec\u7684\u65f6\u5019\uff0c\u5374\u53d1\u73b0\u5982\u679c\u4f60\u8d8a\u662f\u4ed4\u7ec6\u63a8\u6572\uff0c\u7591\u8651\u4e5f\u5c31\u8d8a\u6765\u8d8a\u591a\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u5927\u6982\u5728\u4e00\u5e74\u4ee5\u524d\uff0c\u5173\u4e8eRedis\u5206\u5e03\u5f0f\u9501\u7684\u5b89\u5168\u6027\u95ee\u9898\uff0c\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e13\u5bb6Martin Kleppmann\u548cRedis\u7684\u4f5c\u8005antirez\u4e4b\u95f4\u5c31\u53d1\u751f\u8fc7\u4e00\u573a\u4e89\u8bba\u3002\u7531\u4e8e\u5bf9\u8fd9\u4e2a\u95ee\u9898\u4e00\u76f4\u4ee5\u6765\u6bd4\u8f83\u5173\u6ce8\uff0c\u6240\u4ee5\u6211\u524d\u4e9b\u65e5\u5b50\u4ed4\u7ec6\u9605\u8bfb\u4e86\u4e0e\u8fd9\u573a\u4e89\u8bba\u76f8\u5173\u7684\u8d44\u6599\u3002\u8fd9\u573a\u4e89\u8bba\u7684\u5927\u6982\u8fc7\u7a0b\u662f\u8fd9\u6837\u7684\uff1a\u4e3a\u4e86\u89c4\u8303\u5404\u5bb6\u5bf9\u57fa\u4e8eRedis\u7684\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\uff0cRedis\u7684\u4f5c\u8005\u63d0\u51fa\u4e86\u4e00\u4e2a\u66f4\u5b89\u5168\u7684\u5b9e\u73b0\uff0c\u53eb\u505aRedlock\u3002\u6709\u4e00\u5929\uff0cMartin Kleppmann\u5199\u4e86\u4e00\u7bc7blog\uff0c\u5206\u6790\u4e86Redlock\u5728\u5b89\u5168\u6027\u4e0a\u5b58\u5728\u7684\u4e00\u4e9b\u95ee\u9898\u3002\u7136\u540eRedis\u7684\u4f5c\u8005\u7acb\u5373\u5199\u4e86\u4e00\u7bc7blog\u6765\u53cd\u9a73Martin\u7684\u5206\u6790\u3002\u4f46Martin\u8868\u793a\u4ecd\u7136\u575a\u6301\u539f\u6765\u7684\u89c2\u70b9\u3002\u968f\u540e\uff0c\u8fd9\u4e2a\u95ee\u9898\u5728Twitter\u548cHacker News\u4e0a\u5f15\u53d1\u4e86\u6fc0\u70c8\u7684\u8ba8\u8bba\uff0c\u5f88\u591a\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u4e13\u5bb6\u90fd\u53c2\u4e0e\u5176\u4e2d\u3002<\/p>\n<p>\u5bf9\u4e8e\u90a3\u4e9b\u5bf9\u5206\u5e03\u5f0f\u7cfb\u7edf\u611f\u5174\u8da3\u7684\u4eba\u6765\u8bf4\uff0c\u8fd9\u4e2a\u4e8b\u4ef6\u975e\u5e38\u503c\u5f97\u5173\u6ce8\u3002\u4e0d\u7ba1\u4f60\u662f\u521a\u63a5\u89e6\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u65b0\u624b\uff0c\u8fd8\u662f\u6709\u7740\u591a\u5e74\u5206\u5e03\u5f0f\u5f00\u53d1\u7ecf\u9a8c\u7684\u8001\u624b\uff0c\u8bfb\u5b8c\u8fd9\u4e9b\u5206\u6790\u548c\u8bc4\u8bba\u4e4b\u540e\uff0c\u5927\u6982\u90fd\u4f1a\u6709\u6240\u6536\u83b7\u3002\u8981\u77e5\u9053\uff0c\u4eb2\u624b\u5b9e\u73b0\u8fc7Redis Cluster\u8fd9\u6837\u4e00\u4e2a\u590d\u6742\u7cfb\u7edf\u7684antirez\uff0c\u8db3\u4ee5\u7b97\u5f97\u4e0a\u5206\u5e03\u5f0f\u9886\u57df\u7684\u4e00\u540d\u4e13\u5bb6\u4e86\u3002\u4f46\u5bf9\u4e8e\u7531\u5206\u5e03\u5f0f\u9501\u5f15\u53d1\u7684\u4e00\u7cfb\u5217\u95ee\u9898\u7684\u5206\u6790\u4e2d\uff0c\u4e0d\u540c\u7684\u4e13\u5bb6\u5374\u80fd\u5f97\u51fa\u8fe5\u5f02\u7684\u7ed3\u8bba\uff0c\u4ece\u4e2d\u6211\u4eec\u53ef\u4ee5\u7aa5\u89c1\u5206\u5e03\u5f0f\u7cfb\u7edf\u76f8\u5173\u7684\u95ee\u9898\u5177\u6709\u4f55\u7b49\u7684\u590d\u6742\u6027\u3002\u5b9e\u9645\u4e0a\uff0c\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u8bbe\u8ba1\u4e2d\u7ecf\u5e38\u53d1\u751f\u7684\u4e8b\u60c5\u662f\uff1a\u8bb8\u591a\u60f3\u6cd5\u521d\u770b\u8d77\u6765\u6beb\u65e0\u7834\u7efd\uff0c\u800c\u4e00\u65e6\u8be6\u52a0\u8003\u91cf\uff0c\u5374\u53d1\u73b0\u4e0d\u662f\u90a3\u4e48\u5929\u8863\u65e0\u7f1d\u3002<\/p>\n<p>\u4e0b\u9762\uff0c\u6211\u4eec\u5c31\u4ece\u5934\u81f3\u5c3e\u628a\u8fd9\u573a\u4e89\u8bba\u8fc7\u7a0b\u4e2d\u5404\u65b9\u7684\u89c2\u70b9\u8fdb\u884c\u4e00\u4e0b\u56de\u987e\u548c\u5206\u6790\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u628a\u5f71\u54cd\u5206\u5e03\u5f0f\u9501\u7684\u5b89\u5168\u6027\u7684\u90a3\u4e9b\u6280\u672f\u7ec6\u8282\u5c55\u5f00\u8fdb\u884c\u8ba8\u8bba\uff0c\u8fd9\u5c06\u662f\u4e00\u4ef6\u5f88\u6709\u610f\u601d\u7684\u4e8b\u60c5\u3002\u8fd9\u4e5f\u662f\u4e00\u4e2a\u6bd4\u8f83\u957f\u7684\u6545\u4e8b\u3002\u5f53\u7136\uff0c\u5176\u4e2d\u4e5f\u514d\u4e0d\u4e86\u5305\u542b\u4e00\u4e9b\u5c0f\u201c\u516b\u5366\u201d\u3002<\/p>\n<h1>Redlock\u7b97\u6cd5<\/h1>\n<p>\u5c31\u50cf\u672c\u6587\u5f00\u5934\u6240\u8bb2\u7684\uff0c\u501f\u52a9Redis\u6765\u5b9e\u73b0\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501(Distributed Lock)\u7684\u505a\u6cd5\uff0c\u5df2\u7ecf\u6709\u5f88\u591a\u4eba\u5c1d\u8bd5\u8fc7\u3002\u4eba\u4eec\u6784\u5efa\u8fd9\u6837\u7684\u5206\u5e03\u5f0f\u9501\u7684\u76ee\u7684\uff0c\u662f\u4e3a\u4e86\u5bf9\u4e00\u4e9b\u5171\u4eab\u8d44\u6e90\u8fdb\u884c\u4e92\u65a5\u8bbf\u95ee\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u8fd9\u4e9b\u5b9e\u73b0\u867d\u7136\u601d\u8def\u5927\u4f53\u76f8\u8fd1\uff0c\u4f46\u5b9e\u73b0\u7ec6\u8282\u4e0a\u5404\u4e0d\u76f8\u540c\uff0c\u5b83\u4eec\u80fd\u63d0\u4f9b\u7684\u5b89\u5168\u6027\u548c\u53ef\u7528\u6027\u4e5f\u4e0d\u5c3d\u76f8\u540c\u3002\u6240\u4ee5\uff0cRedis\u7684\u4f5c\u8005antirez\u7ed9\u51fa\u4e86\u4e00\u4e2a\u66f4\u597d\u7684\u5b9e\u73b0\uff0c\u79f0\u4e3aRedlock\uff0c\u7b97\u662fRedis\u5b98\u65b9\u5bf9\u4e8e\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u6307\u5bfc\u89c4\u8303\u3002Redlock\u7684\u7b97\u6cd5\u63cf\u8ff0\u5c31\u653e\u5728Redis\u7684\u5b98\u7f51\u4e0a\uff1a<\/p>\n<ul>\n<li><a href=\"https:\/\/redis.io\/topics\/distlock\">https:\/\/redis.io\/topics\/distlock<\/a><\/li>\n<\/ul>\n<p>\u5728Redlock\u4e4b\u524d\uff0c\u5f88\u591a\u4eba\u5bf9\u4e8e\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\u90fd\u662f\u57fa\u4e8e\u5355\u4e2aRedis\u8282\u70b9\u7684\u3002\u800cRedlock\u662f\u57fa\u4e8e\u591a\u4e2aRedis\u8282\u70b9\uff08\u90fd\u662fMaster\uff09\u7684\u4e00\u79cd\u5b9e\u73b0\u3002\u4e3a\u4e86\u80fd\u7406\u89e3Redlock\uff0c\u6211\u4eec\u9996\u5148\u9700\u8981\u628a\u7b80\u5355\u7684\u57fa\u4e8e\u5355Redis\u8282\u70b9\u7684\u7b97\u6cd5\u63cf\u8ff0\u6e05\u695a\uff0c\u56e0\u4e3a\u5b83\u662fRedlock\u7684\u57fa\u7840\u3002<\/p>\n<h2>\u57fa\u4e8e\u5355Redis\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u9501<\/h2>\n<p>\u9996\u5148\uff0cRedis\u5ba2\u6237\u7aef\u4e3a\u4e86\u83b7\u53d6\u9501\uff0c\u5411Redis\u8282\u70b9\u53d1\u9001\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre class=\"brush: bash; title: ; notranslate\" title=\"\">\r\nSET resource_name my_random_value NX PX 30000\r\n<\/pre>\n<p>\u4e0a\u9762\u7684\u547d\u4ee4\u5982\u679c\u6267\u884c\u6210\u529f\uff0c\u5219\u5ba2\u6237\u7aef\u6210\u529f\u83b7\u53d6\u5230\u4e86\u9501\uff0c\u63a5\u4e0b\u6765\u5c31\u53ef\u4ee5\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u4e86\uff1b\u800c\u5982\u679c\u4e0a\u9762\u7684\u547d\u4ee4\u6267\u884c\u5931\u8d25\uff0c\u5219\u8bf4\u660e\u83b7\u53d6\u9501\u5931\u8d25\u3002<\/p>\n<p>\u6ce8\u610f\uff0c\u5728\u4e0a\u9762\u7684SET\u547d\u4ee4\u4e2d\uff1a<\/p>\n<p>my_random_value\u662f\u7531\u5ba2\u6237\u7aef\u751f\u6210\u7684\u4e00\u4e2a\u968f\u673a\u5b57\u7b26\u4e32\uff0c\u5b83\u8981\u4fdd\u8bc1\u5728\u8db3\u591f\u957f\u7684\u4e00\u6bb5\u65f6\u95f4\u5185\u5728\u6240\u6709\u5ba2\u6237\u7aef\u7684\u6240\u6709\u83b7\u53d6\u9501\u7684\u8bf7\u6c42\u4e2d\u90fd\u662f\u552f\u4e00\u7684\u3002<br \/>\nNX\u8868\u793a\u53ea\u6709\u5f53resource_name\u5bf9\u5e94\u7684key\u503c\u4e0d\u5b58\u5728\u7684\u65f6\u5019\u624d\u80fdSET\u6210\u529f\u3002\u8fd9\u4fdd\u8bc1\u4e86\u53ea\u6709\u7b2c\u4e00\u4e2a\u8bf7\u6c42\u7684\u5ba2\u6237\u7aef\u624d\u80fd\u83b7\u5f97\u9501\uff0c\u800c\u5176\u5b83\u5ba2\u6237\u7aef\u5728\u9501\u88ab\u91ca\u653e\u4e4b\u524d\u90fd\u65e0\u6cd5\u83b7\u5f97\u9501\u3002<br \/>\nPX 30000\u8868\u793a\u8fd9\u4e2a\u9501\u6709\u4e00\u4e2a30\u79d2\u7684\u81ea\u52a8\u8fc7\u671f\u65f6\u95f4\u3002\u5f53\u7136\uff0c\u8fd9\u91cc30\u79d2\u53ea\u662f\u4e00\u4e2a\u4f8b\u5b50\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u9009\u62e9\u5408\u9002\u7684\u8fc7\u671f\u65f6\u95f4\u3002<\/p>\n<p>\u6700\u540e\uff0c\u5f53\u5ba2\u6237\u7aef\u5b8c\u6210\u4e86\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u64cd\u4f5c\u4e4b\u540e\uff0c\u6267\u884c\u4e0b\u9762\u7684Redis Lua\u811a\u672c\u6765\u91ca\u653e\u9501\uff1a<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\nif redis.call(&quot;get&quot;,KEYS&#x5B;1]) == ARGV&#x5B;1] then\r\n    return redis.call(&quot;del&quot;,KEYS&#x5B;1])\r\nelse\r\n    return 0\r\nend\r\n<\/pre>\n<p>\u8fd9\u6bb5Lua\u811a\u672c\u5728\u6267\u884c\u7684\u65f6\u5019\u8981\u628a\u524d\u9762\u7684my_random_value\u4f5c\u4e3aARGV[1]\u7684\u503c\u4f20\u8fdb\u53bb\uff0c\u628aresource_name\u4f5c\u4e3aKEYS[1]\u7684\u503c\u4f20\u8fdb\u53bb\u3002<\/p>\n<p>\u81f3\u6b64\uff0c\u57fa\u4e8e\u5355Redis\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u9501\u7684\u7b97\u6cd5\u5c31\u63cf\u8ff0\u5b8c\u4e86\u3002\u8fd9\u91cc\u9762\u6709\u597d\u51e0\u4e2a\u95ee\u9898\u9700\u8981\u91cd\u70b9\u5206\u6790\u4e00\u4e0b\u3002<\/p>\n<p>\u9996\u5148\u7b2c\u4e00\u4e2a\u95ee\u9898\uff0c\u8fd9\u4e2a\u9501\u5fc5\u987b\u8981\u8bbe\u7f6e\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4\u3002\u5426\u5219\u7684\u8bdd\uff0c\u5f53\u4e00\u4e2a\u5ba2\u6237\u7aef\u83b7\u53d6\u9501\u6210\u529f\u4e4b\u540e\uff0c\u5047\u5982\u5b83\u5d29\u6e83\u4e86\uff0c\u6216\u8005\u7531\u4e8e\u53d1\u751f\u4e86\u7f51\u7edc\u5206\u5272\uff08network partition\uff09\u5bfc\u81f4\u5b83\u518d\u4e5f\u65e0\u6cd5\u548cRedis\u8282\u70b9\u901a\u4fe1\u4e86\uff0c\u90a3\u4e48\u5b83\u5c31\u4f1a\u4e00\u76f4\u6301\u6709\u8fd9\u4e2a\u9501\uff0c\u800c\u5176\u5b83\u5ba2\u6237\u7aef\u6c38\u8fdc\u65e0\u6cd5\u83b7\u5f97\u9501\u4e86\u3002antirez\u5728\u540e\u9762\u7684\u5206\u6790\u4e2d\u4e5f\u7279\u522b\u5f3a\u8c03\u4e86\u8fd9\u4e00\u70b9\uff0c\u800c\u4e14\u628a\u8fd9\u4e2a\u8fc7\u671f\u65f6\u95f4\u79f0\u4e3a\u9501\u7684\u6709\u6548\u65f6\u95f4(lock validity time)\u3002\u83b7\u5f97\u9501\u7684\u5ba2\u6237\u7aef\u5fc5\u987b\u5728\u8fd9\u4e2a\u65f6\u95f4\u4e4b\u5185\u5b8c\u6210\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u3002<\/p>\n<p>\u7b2c\u4e8c\u4e2a\u95ee\u9898\uff0c\u7b2c\u4e00\u6b65\u83b7\u53d6\u9501\u7684\u64cd\u4f5c\uff0c\u7f51\u4e0a\u4e0d\u5c11\u6587\u7ae0\u628a\u5b83\u5b9e\u73b0\u6210\u4e86\u4e24\u4e2aRedis\u547d\u4ee4\uff1a<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\nSETNX resource_name my_random_value\r\nEXPIRE resource_name 30\r\n<\/pre>\n<p>\u867d\u7136\u8fd9\u4e24\u4e2a\u547d\u4ee4\u548c\u524d\u9762\u7b97\u6cd5\u63cf\u8ff0\u4e2d\u7684\u4e00\u4e2aSET\u547d\u4ee4\u6267\u884c\u6548\u679c\u76f8\u540c\uff0c\u4f46\u5374\u4e0d\u662f\u539f\u5b50\u7684\u3002\u5982\u679c\u5ba2\u6237\u7aef\u5728\u6267\u884c\u5b8cSETNX\u540e\u5d29\u6e83\u4e86\uff0c\u90a3\u4e48\u5c31\u6ca1\u6709\u673a\u4f1a\u6267\u884cEXPIRE\u4e86\uff0c\u5bfc\u81f4\u5b83\u4e00\u76f4\u6301\u6709\u8fd9\u4e2a\u9501\u3002<\/p>\n<p>\u7b2c\u4e09\u4e2a\u95ee\u9898\uff0c\u4e5f\u662fantirez\u6307\u51fa\u7684\uff0c\u8bbe\u7f6e\u4e00\u4e2a\u968f\u673a\u5b57\u7b26\u4e32my_random_value\u662f\u5f88\u6709\u5fc5\u8981\u7684\uff0c\u5b83\u4fdd\u8bc1\u4e86\u4e00\u4e2a\u5ba2\u6237\u7aef\u91ca\u653e\u7684\u9501\u5fc5\u987b\u662f\u81ea\u5df1\u6301\u6709\u7684\u90a3\u4e2a\u9501\u3002\u5047\u5982\u83b7\u53d6\u9501\u65f6SET\u7684\u4e0d\u662f\u4e00\u4e2a\u968f\u673a\u5b57\u7b26\u4e32\uff0c\u800c\u662f\u4e00\u4e2a\u56fa\u5b9a\u503c\uff0c\u90a3\u4e48\u53ef\u80fd\u4f1a\u53d1\u751f\u4e0b\u9762\u7684\u6267\u884c\u5e8f\u5217\uff1a<\/p>\n<ol>\n<li>\u5ba2\u6237\u7aef1\u83b7\u53d6\u9501\u6210\u529f\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u5728\u67d0\u4e2a\u64cd\u4f5c\u4e0a\u963b\u585e\u4e86\u5f88\u957f\u65f6\u95f4\u3002<\/li>\n<li>\u8fc7\u671f\u65f6\u95f4\u5230\u4e86\uff0c\u9501\u81ea\u52a8\u91ca\u653e\u4e86\u3002<\/li>\n<li>\u5ba2\u6237\u7aef2\u83b7\u53d6\u5230\u4e86\u5bf9\u5e94\u540c\u4e00\u4e2a\u8d44\u6e90\u7684\u9501\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u4ece\u963b\u585e\u4e2d\u6062\u590d\u8fc7\u6765\uff0c\u91ca\u653e\u6389\u4e86\u5ba2\u6237\u7aef2\u6301\u6709\u7684\u9501\u3002<\/li>\n<\/ol>\n<p>\u4e4b\u540e\uff0c\u5ba2\u6237\u7aef2\u5728\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u7684\u65f6\u5019\uff0c\u5c31\u6ca1\u6709\u9501\u4e3a\u5b83\u63d0\u4f9b\u4fdd\u62a4\u4e86\u3002<\/p>\n<p>\u7b2c\u56db\u4e2a\u95ee\u9898\uff0c\u91ca\u653e\u9501\u7684\u64cd\u4f5c\u5fc5\u987b\u4f7f\u7528Lua\u811a\u672c\u6765\u5b9e\u73b0\u3002\u91ca\u653e\u9501\u5176\u5b9e\u5305\u542b\u4e09\u6b65\u64cd\u4f5c\uff1a\u2019GET\u2019\u3001\u5224\u65ad\u548c\u2019DEL\u2019\uff0c\u7528Lua\u811a\u672c\u6765\u5b9e\u73b0\u80fd\u4fdd\u8bc1\u8fd9\u4e09\u6b65\u7684\u539f\u5b50\u6027\u3002\u5426\u5219\uff0c\u5982\u679c\u628a\u8fd9\u4e09\u6b65\u64cd\u4f5c\u653e\u5230\u5ba2\u6237\u7aef\u903b\u8f91\u4e2d\u53bb\u6267\u884c\u7684\u8bdd\uff0c\u5c31\u6709\u53ef\u80fd\u53d1\u751f\u4e0e\u524d\u9762\u7b2c\u4e09\u4e2a\u95ee\u9898\u7c7b\u4f3c\u7684\u6267\u884c\u5e8f\u5217\uff1a<\/p>\n<ol>\n<li>\u5ba2\u6237\u7aef1\u83b7\u53d6\u9501\u6210\u529f\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u4e3a\u4e86\u91ca\u653e\u9501\uff0c\u5148\u6267\u884c\u2019GET\u2019\u64cd\u4f5c\u83b7\u53d6\u968f\u673a\u5b57\u7b26\u4e32\u7684\u503c\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u5224\u65ad\u968f\u673a\u5b57\u7b26\u4e32\u7684\u503c\uff0c\u4e0e\u9884\u671f\u7684\u503c\u76f8\u7b49\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u7531\u4e8e\u67d0\u4e2a\u539f\u56e0\u963b\u585e\u4f4f\u4e86\u5f88\u957f\u65f6\u95f4\u3002<\/li>\n<li>\u8fc7\u671f\u65f6\u95f4\u5230\u4e86\uff0c\u9501\u81ea\u52a8\u91ca\u653e\u4e86\u3002<\/li>\n<li>\u5ba2\u6237\u7aef2\u83b7\u53d6\u5230\u4e86\u5bf9\u5e94\u540c\u4e00\u4e2a\u8d44\u6e90\u7684\u9501\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u4ece\u963b\u585e\u4e2d\u6062\u590d\u8fc7\u6765\uff0c\u6267\u884cDEL\u64cd\u7eb5\uff0c\u91ca\u653e\u6389\u4e86\u5ba2\u6237\u7aef2\u6301\u6709\u7684\u9501\u3002<\/li>\n<\/ol>\n<p>\u5b9e\u9645\u4e0a\uff0c\u5728\u4e0a\u8ff0\u7b2c\u4e09\u4e2a\u95ee\u9898\u548c\u7b2c\u56db\u4e2a\u95ee\u9898\u7684\u5206\u6790\u4e2d\uff0c\u5982\u679c\u4e0d\u662f\u5ba2\u6237\u7aef\u963b\u585e\u4f4f\u4e86\uff0c\u800c\u662f\u51fa\u73b0\u4e86\u5927\u7684\u7f51\u7edc\u5ef6\u8fdf\uff0c\u4e5f\u6709\u53ef\u80fd\u5bfc\u81f4\u7c7b\u4f3c\u7684\u6267\u884c\u5e8f\u5217\u53d1\u751f\u3002<\/p>\n<p>\u524d\u9762\u7684\u56db\u4e2a\u95ee\u9898\uff0c\u53ea\u8981\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u65f6\u5019\u52a0\u4ee5\u6ce8\u610f\uff0c\u5c31\u90fd\u80fd\u591f\u88ab\u6b63\u786e\u5904\u7406\u3002\u4f46\u9664\u6b64\u4e4b\u5916\uff0cantirez\u8fd8\u6307\u51fa\u4e86\u4e00\u4e2a\u95ee\u9898\uff0c\u662f\u7531failover\u5f15\u8d77\u7684\uff0c\u5374\u662f\u57fa\u4e8e\u5355Redis\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u9501\u65e0\u6cd5\u89e3\u51b3\u7684\u3002\u6b63\u662f\u8fd9\u4e2a\u95ee\u9898\u50ac\u751f\u4e86Redlock\u7684\u51fa\u73b0\u3002<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u662f\u8fd9\u6837\u7684\u3002\u5047\u5982Redis\u8282\u70b9\u5b95\u673a\u4e86\uff0c\u90a3\u4e48\u6240\u6709\u5ba2\u6237\u7aef\u5c31\u90fd\u65e0\u6cd5\u83b7\u5f97\u9501\u4e86\uff0c\u670d\u52a1\u53d8\u5f97\u4e0d\u53ef\u7528\u3002\u4e3a\u4e86\u63d0\u9ad8\u53ef\u7528\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u7ed9\u8fd9\u4e2aRedis\u8282\u70b9\u6302\u4e00\u4e2aSlave\uff0c\u5f53Master\u8282\u70b9\u4e0d\u53ef\u7528\u7684\u65f6\u5019\uff0c\u7cfb\u7edf\u81ea\u52a8\u5207\u5230Slave\u4e0a\uff08failover\uff09\u3002\u4f46\u7531\u4e8eRedis\u7684\u4e3b\u4ece\u590d\u5236\uff08replication\uff09\u662f\u5f02\u6b65\u7684\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u5728failover\u8fc7\u7a0b\u4e2d\u4e27\u5931\u9501\u7684\u5b89\u5168\u6027\u3002\u8003\u8651\u4e0b\u9762\u7684\u6267\u884c\u5e8f\u5217\uff1a<\/p>\n<ol>\n<li>\u5ba2\u6237\u7aef1\u4eceMaster\u83b7\u53d6\u4e86\u9501\u3002<\/li>\n<li>Master\u5b95\u673a\u4e86\uff0c\u5b58\u50a8\u9501\u7684key\u8fd8\u6ca1\u6709\u6765\u5f97\u53ca\u540c\u6b65\u5230Slave\u4e0a\u3002<\/li>\n<li>Slave\u5347\u7ea7\u4e3aMaster\u3002<\/li>\n<li>\u5ba2\u6237\u7aef2\u4ece\u65b0\u7684Master\u83b7\u53d6\u5230\u4e86\u5bf9\u5e94\u540c\u4e00\u4e2a\u8d44\u6e90\u7684\u9501\u3002<\/li>\n<\/ol>\n<p>\u4e8e\u662f\uff0c\u5ba2\u6237\u7aef1\u548c\u5ba2\u6237\u7aef2\u540c\u65f6\u6301\u6709\u4e86\u540c\u4e00\u4e2a\u8d44\u6e90\u7684\u9501\u3002\u9501\u7684\u5b89\u5168\u6027\u88ab\u6253\u7834\u3002\u9488\u5bf9\u8fd9\u4e2a\u95ee\u9898\uff0cantirez\u8bbe\u8ba1\u4e86Redlock\u7b97\u6cd5\uff0c\u6211\u4eec\u63a5\u4e0b\u6765\u4f1a\u8ba8\u8bba\u3002<\/p>\n<h3>\u3010\u5176\u5b83\u7591\u95ee\u3011<\/h3>\n<p>\u524d\u9762\u8fd9\u4e2a\u7b97\u6cd5\u4e2d\u51fa\u73b0\u7684\u9501\u7684\u6709\u6548\u65f6\u95f4(lock validity time)\uff0c\u8bbe\u7f6e\u6210\u591a\u5c11\u5408\u9002\u5462\uff1f\u5982\u679c\u8bbe\u7f6e\u592a\u77ed\u7684\u8bdd\uff0c\u9501\u5c31\u6709\u53ef\u80fd\u5728\u5ba2\u6237\u7aef\u5b8c\u6210\u5bf9\u4e8e\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u4e4b\u524d\u8fc7\u671f\uff0c\u4ece\u800c\u5931\u53bb\u4fdd\u62a4\uff1b\u5982\u679c\u8bbe\u7f6e\u592a\u957f\u7684\u8bdd\uff0c\u4e00\u65e6\u67d0\u4e2a\u6301\u6709\u9501\u7684\u5ba2\u6237\u7aef\u91ca\u653e\u9501\u5931\u8d25\uff0c\u90a3\u4e48\u5c31\u4f1a\u5bfc\u81f4\u6240\u6709\u5176\u5b83\u5ba2\u6237\u7aef\u90fd\u65e0\u6cd5\u83b7\u53d6\u9501\uff0c\u4ece\u800c\u957f\u65f6\u95f4\u5185\u65e0\u6cd5\u6b63\u5e38\u5de5\u4f5c\u3002\u770b\u6765\u771f\u662f\u4e2a\u4e24\u96be\u7684\u95ee\u9898\u3002<\/p>\n<p>\u800c\u4e14\uff0c\u5728\u524d\u9762\u5bf9\u4e8e\u968f\u673a\u5b57\u7b26\u4e32my_random_value\u7684\u5206\u6790\u4e2d\uff0cantirez\u4e5f\u5728\u6587\u7ae0\u4e2d\u627f\u8ba4\u7684\u786e\u5e94\u8be5\u8003\u8651\u5ba2\u6237\u7aef\u957f\u671f\u963b\u585e\u5bfc\u81f4\u9501\u8fc7\u671f\u7684\u60c5\u51b5\u3002\u5982\u679c\u771f\u7684\u53d1\u751f\u4e86\u8fd9\u79cd\u60c5\u51b5\uff0c\u90a3\u4e48\u5171\u4eab\u8d44\u6e90\u662f\u4e0d\u662f\u5df2\u7ecf\u5931\u53bb\u4e86\u4fdd\u62a4\u5462\uff1fantirez\u91cd\u65b0\u8bbe\u8ba1\u7684Redlock\u662f\u5426\u80fd\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u5462\uff1f<\/p>\n<h2>\u5206\u5e03\u5f0f\u9501Redlock<\/h2>\n<p>\u7531\u4e8e\u524d\u9762\u4ecb\u7ecd\u7684\u57fa\u4e8e\u5355Redis\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u9501\u5728failover\u7684\u65f6\u5019\u4f1a\u4ea7\u751f\u89e3\u51b3\u4e0d\u4e86\u7684\u5b89\u5168\u6027\u95ee\u9898\uff0c\u56e0\u6b64antirez\u63d0\u51fa\u4e86\u65b0\u7684\u5206\u5e03\u5f0f\u9501\u7684\u7b97\u6cd5Redlock\uff0c\u5b83\u57fa\u4e8eN\u4e2a\u5b8c\u5168\u72ec\u7acb\u7684Redis\u8282\u70b9\uff08\u901a\u5e38\u60c5\u51b5\u4e0bN\u53ef\u4ee5\u8bbe\u7f6e\u62105\uff09\u3002<\/p>\n<p>\u8fd0\u884cRedlock\u7b97\u6cd5\u7684\u5ba2\u6237\u7aef\u4f9d\u6b21\u6267\u884c\u4e0b\u9762\u5404\u4e2a\u6b65\u9aa4\uff0c\u6765\u5b8c\u6210\u83b7\u53d6\u9501\u7684\u64cd\u4f5c\uff1a<\/p>\n<ol>\n<li>\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\uff08\u6beb\u79d2\u6570\uff09\u3002<\/li>\n<li>\u6309\u987a\u5e8f\u4f9d\u6b21\u5411N\u4e2aRedis\u8282\u70b9\u6267\u884c\u83b7\u53d6\u9501\u7684\u64cd\u4f5c\u3002\u8fd9\u4e2a\u83b7\u53d6\u64cd\u4f5c\u8ddf\u524d\u9762\u57fa\u4e8e\u5355Redis\u8282\u70b9\u7684\u83b7\u53d6\u9501\u7684\u8fc7\u7a0b\u76f8\u540c\uff0c\u5305\u542b\u968f\u673a\u5b57\u7b26\u4e32my_random_value\uff0c\u4e5f\u5305\u542b\u8fc7\u671f\u65f6\u95f4(\u6bd4\u5982PX 30000\uff0c\u5373\u9501\u7684\u6709\u6548\u65f6\u95f4)\u3002\u4e3a\u4e86\u4fdd\u8bc1\u5728\u67d0\u4e2aRedis\u8282\u70b9\u4e0d\u53ef\u7528\u7684\u65f6\u5019\u7b97\u6cd5\u80fd\u591f\u7ee7\u7eed\u8fd0\u884c\uff0c\u8fd9\u4e2a\u83b7\u53d6\u9501\u7684\u64cd\u4f5c\u8fd8\u6709\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4(time out)\uff0c\u5b83\u8981\u8fdc\u5c0f\u4e8e\u9501\u7684\u6709\u6548\u65f6\u95f4\uff08\u51e0\u5341\u6beb\u79d2\u91cf\u7ea7\uff09\u3002\u5ba2\u6237\u7aef\u5728\u5411\u67d0\u4e2aRedis\u8282\u70b9\u83b7\u53d6\u9501\u5931\u8d25\u4ee5\u540e\uff0c\u5e94\u8be5\u7acb\u5373\u5c1d\u8bd5\u4e0b\u4e00\u4e2aRedis\u8282\u70b9\u3002\u8fd9\u91cc\u7684\u5931\u8d25\uff0c\u5e94\u8be5\u5305\u542b\u4efb\u4f55\u7c7b\u578b\u7684\u5931\u8d25\uff0c\u6bd4\u5982\u8be5Redis\u8282\u70b9\u4e0d\u53ef\u7528\uff0c\u6216\u8005\u8be5Redis\u8282\u70b9\u4e0a\u7684\u9501\u5df2\u7ecf\u88ab\u5176\u5b83\u5ba2\u6237\u7aef\u6301\u6709\uff08\u6ce8\uff1aRedlock\u539f\u6587\u4e2d\u8fd9\u91cc\u53ea\u63d0\u5230\u4e86Redis\u8282\u70b9\u4e0d\u53ef\u7528\u7684\u60c5\u51b5\uff0c\u4f46\u4e5f\u5e94\u8be5\u5305\u542b\u5176\u5b83\u7684\u5931\u8d25\u60c5\u51b5\uff09\u3002<\/li>\n<li>\u8ba1\u7b97\u6574\u4e2a\u83b7\u53d6\u9501\u7684\u8fc7\u7a0b\u603b\u5171\u6d88\u8017\u4e86\u591a\u957f\u65f6\u95f4\uff0c\u8ba1\u7b97\u65b9\u6cd5\u662f\u7528\u5f53\u524d\u65f6\u95f4\u51cf\u53bb\u7b2c1\u6b65\u8bb0\u5f55\u7684\u65f6\u95f4\u3002\u5982\u679c\u5ba2\u6237\u7aef\u4ece\u5927\u591a\u6570Redis\u8282\u70b9\uff08&gt;= N\/2+1\uff09\u6210\u529f\u83b7\u53d6\u5230\u4e86\u9501\uff0c\u5e76\u4e14\u83b7\u53d6\u9501\u603b\u5171\u6d88\u8017\u7684\u65f6\u95f4\u6ca1\u6709\u8d85\u8fc7\u9501\u7684\u6709\u6548\u65f6\u95f4(lock validity time)\uff0c\u90a3\u4e48\u8fd9\u65f6\u5ba2\u6237\u7aef\u624d\u8ba4\u4e3a\u6700\u7ec8\u83b7\u53d6\u9501\u6210\u529f\uff1b\u5426\u5219\uff0c\u8ba4\u4e3a\u6700\u7ec8\u83b7\u53d6\u9501\u5931\u8d25\u3002<\/li>\n<li>\u5982\u679c\u6700\u7ec8\u83b7\u53d6\u9501\u6210\u529f\u4e86\uff0c\u90a3\u4e48\u8fd9\u4e2a\u9501\u7684\u6709\u6548\u65f6\u95f4\u5e94\u8be5\u91cd\u65b0\u8ba1\u7b97\uff0c\u5b83\u7b49\u4e8e\u6700\u521d\u7684\u9501\u7684\u6709\u6548\u65f6\u95f4\u51cf\u53bb\u7b2c3\u6b65\u8ba1\u7b97\u51fa\u6765\u7684\u83b7\u53d6\u9501\u6d88\u8017\u7684\u65f6\u95f4\u3002<\/li>\n<li>\u5982\u679c\u6700\u7ec8\u83b7\u53d6\u9501\u5931\u8d25\u4e86\uff08\u53ef\u80fd\u7531\u4e8e\u83b7\u53d6\u5230\u9501\u7684Redis\u8282\u70b9\u4e2a\u6570\u5c11\u4e8eN\/2+1\uff0c\u6216\u8005\u6574\u4e2a\u83b7\u53d6\u9501\u7684\u8fc7\u7a0b\u6d88\u8017\u7684\u65f6\u95f4\u8d85\u8fc7\u4e86\u9501\u7684\u6700\u521d\u6709\u6548\u65f6\u95f4\uff09\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u5e94\u8be5\u7acb\u5373\u5411\u6240\u6709Redis\u8282\u70b9\u53d1\u8d77\u91ca\u653e\u9501\u7684\u64cd\u4f5c\uff08\u5373\u524d\u9762\u4ecb\u7ecd\u7684Redis Lua\u811a\u672c\uff09\u3002<\/li>\n<\/ol>\n<p>\u5f53\u7136\uff0c\u4e0a\u9762\u63cf\u8ff0\u7684\u53ea\u662f\u83b7\u53d6\u9501\u7684\u8fc7\u7a0b\uff0c\u800c\u91ca\u653e\u9501\u7684\u8fc7\u7a0b\u6bd4\u8f83\u7b80\u5355\uff1a\u5ba2\u6237\u7aef\u5411\u6240\u6709Redis\u8282\u70b9\u53d1\u8d77\u91ca\u653e\u9501\u7684\u64cd\u4f5c\uff0c\u4e0d\u7ba1\u8fd9\u4e9b\u8282\u70b9\u5f53\u65f6\u5728\u83b7\u53d6\u9501\u7684\u65f6\u5019\u6210\u529f\u4e0e\u5426\u3002<\/p>\n<p>\u7531\u4e8eN\u4e2aRedis\u8282\u70b9\u4e2d\u7684\u5927\u591a\u6570\u80fd\u6b63\u5e38\u5de5\u4f5c\u5c31\u80fd\u4fdd\u8bc1Redlock\u6b63\u5e38\u5de5\u4f5c\uff0c\u56e0\u6b64\u7406\u8bba\u4e0a\u5b83\u7684\u53ef\u7528\u6027\u66f4\u9ad8\u3002\u6211\u4eec\u524d\u9762\u8ba8\u8bba\u7684\u5355Redis\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u9501\u5728failover\u7684\u65f6\u5019\u9501\u5931\u6548\u7684\u95ee\u9898\uff0c\u5728Redlock\u4e2d\u4e0d\u5b58\u5728\u4e86\uff0c\u4f46\u5982\u679c\u6709\u8282\u70b9\u53d1\u751f\u5d29\u6e83\u91cd\u542f\uff0c\u8fd8\u662f\u4f1a\u5bf9\u9501\u7684\u5b89\u5168\u6027\u6709\u5f71\u54cd\u7684\u3002\u5177\u4f53\u7684\u5f71\u54cd\u7a0b\u5ea6\u8ddfRedis\u5bf9\u6570\u636e\u7684\u6301\u4e45\u5316\u7a0b\u5ea6\u6709\u5173\u3002<\/p>\n<p>\u5047\u8bbe\u4e00\u5171\u67095\u4e2aRedis\u8282\u70b9\uff1aA, B, C, D, E\u3002\u8bbe\u60f3\u53d1\u751f\u4e86\u5982\u4e0b\u7684\u4e8b\u4ef6\u5e8f\u5217\uff1a<\/p>\n<ol>\n<li>\u5ba2\u6237\u7aef1\u6210\u529f\u9501\u4f4f\u4e86A, B, C\uff0c\u83b7\u53d6\u9501\u6210\u529f\uff08\u4f46D\u548cE\u6ca1\u6709\u9501\u4f4f\uff09\u3002<\/li>\n<li>\u8282\u70b9C\u5d29\u6e83\u91cd\u542f\u4e86\uff0c\u4f46\u5ba2\u6237\u7aef1\u5728C\u4e0a\u52a0\u7684\u9501\u6ca1\u6709\u6301\u4e45\u5316\u4e0b\u6765\uff0c\u4e22\u5931\u4e86\u3002<\/li>\n<li>\u8282\u70b9C\u91cd\u542f\u540e\uff0c\u5ba2\u6237\u7aef2\u9501\u4f4f\u4e86C, D, E\uff0c\u83b7\u53d6\u9501\u6210\u529f\u3002<\/li>\n<\/ol>\n<p>\u8fd9\u6837\uff0c\u5ba2\u6237\u7aef1\u548c\u5ba2\u6237\u7aef2\u540c\u65f6\u83b7\u5f97\u4e86\u9501\uff08\u9488\u5bf9\u540c\u4e00\u8d44\u6e90\uff09\u3002<\/p>\n<p>\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cRedis\u7684AOF\u6301\u4e45\u5316\u65b9\u5f0f\u662f\u6bcf\u79d2\u5199\u4e00\u6b21\u78c1\u76d8\uff08\u5373\u6267\u884cfsync\uff09\uff0c\u56e0\u6b64\u6700\u574f\u60c5\u51b5\u4e0b\u53ef\u80fd\u4e22\u59311\u79d2\u7684\u6570\u636e\u3002\u4e3a\u4e86\u5c3d\u53ef\u80fd\u4e0d\u4e22\u6570\u636e\uff0cRedis\u5141\u8bb8\u8bbe\u7f6e\u6210\u6bcf\u6b21\u4fee\u6539\u6570\u636e\u90fd\u8fdb\u884cfsync\uff0c\u4f46\u8fd9\u4f1a\u964d\u4f4e\u6027\u80fd\u3002\u5f53\u7136\uff0c\u5373\u4f7f\u6267\u884c\u4e86fsync\u4e5f\u4ecd\u7136\u6709\u53ef\u80fd\u4e22\u5931\u6570\u636e\uff08\u8fd9\u53d6\u51b3\u4e8e\u7cfb\u7edf\u800c\u4e0d\u662fRedis\u7684\u5b9e\u73b0\uff09\u3002\u6240\u4ee5\uff0c\u4e0a\u9762\u5206\u6790\u7684\u7531\u4e8e\u8282\u70b9\u91cd\u542f\u5f15\u53d1\u7684\u9501\u5931\u6548\u95ee\u9898\uff0c\u603b\u662f\u6709\u53ef\u80fd\u51fa\u73b0\u7684\u3002\u4e3a\u4e86\u5e94\u5bf9\u8fd9\u4e00\u95ee\u9898\uff0cantirez\u53c8\u63d0\u51fa\u4e86\u5ef6\u8fdf\u91cd\u542f(delayed restarts)\u7684\u6982\u5ff5\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e00\u4e2a\u8282\u70b9\u5d29\u6e83\u540e\uff0c\u5148\u4e0d\u7acb\u5373\u91cd\u542f\u5b83\uff0c\u800c\u662f\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u518d\u91cd\u542f\uff0c\u8fd9\u6bb5\u65f6\u95f4\u5e94\u8be5\u5927\u4e8e\u9501\u7684\u6709\u6548\u65f6\u95f4(lock validity time)\u3002\u8fd9\u6837\u7684\u8bdd\uff0c\u8fd9\u4e2a\u8282\u70b9\u5728\u91cd\u542f\u524d\u6240\u53c2\u4e0e\u7684\u9501\u90fd\u4f1a\u8fc7\u671f\uff0c\u5b83\u5728\u91cd\u542f\u540e\u5c31\u4e0d\u4f1a\u5bf9\u73b0\u6709\u7684\u9501\u9020\u6210\u5f71\u54cd\u3002<\/p>\n<p>\u5173\u4e8eRedlock\u8fd8\u6709\u4e00\u70b9\u7ec6\u8282\u503c\u5f97\u62ff\u51fa\u6765\u5206\u6790\u4e00\u4e0b\uff1a\u5728\u6700\u540e\u91ca\u653e\u9501\u7684\u65f6\u5019\uff0cantirez\u5728\u7b97\u6cd5\u63cf\u8ff0\u4e2d\u7279\u522b\u5f3a\u8c03\uff0c\u5ba2\u6237\u7aef\u5e94\u8be5\u5411\u6240\u6709Redis\u8282\u70b9\u53d1\u8d77\u91ca\u653e\u9501\u7684\u64cd\u4f5c\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5373\u4f7f\u5f53\u65f6\u5411\u67d0\u4e2a\u8282\u70b9\u83b7\u53d6\u9501\u6ca1\u6709\u6210\u529f\uff0c\u5728\u91ca\u653e\u9501\u7684\u65f6\u5019\u4e5f\u4e0d\u5e94\u8be5\u6f0f\u6389\u8fd9\u4e2a\u8282\u70b9\u3002\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f\u8bbe\u60f3\u8fd9\u6837\u4e00\u79cd\u60c5\u51b5\uff0c\u5ba2\u6237\u7aef\u53d1\u7ed9\u67d0\u4e2aRedis\u8282\u70b9\u7684\u83b7\u53d6\u9501\u7684\u8bf7\u6c42\u6210\u529f\u5230\u8fbe\u4e86\u8be5Redis\u8282\u70b9\uff0c\u8fd9\u4e2a\u8282\u70b9\u4e5f\u6210\u529f\u6267\u884c\u4e86SET\u64cd\u4f5c\uff0c\u4f46\u662f\u5b83\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u7684\u54cd\u5e94\u5305\u5374\u4e22\u5931\u4e86\u3002\u8fd9\u5728\u5ba2\u6237\u7aef\u770b\u6765\uff0c\u83b7\u53d6\u9501\u7684\u8bf7\u6c42\u7531\u4e8e\u8d85\u65f6\u800c\u5931\u8d25\u4e86\uff0c\u4f46\u5728Redis\u8fd9\u8fb9\u770b\u6765\uff0c\u52a0\u9501\u5df2\u7ecf\u6210\u529f\u4e86\u3002\u56e0\u6b64\uff0c\u91ca\u653e\u9501\u7684\u65f6\u5019\uff0c\u5ba2\u6237\u7aef\u4e5f\u5e94\u8be5\u5bf9\u5f53\u65f6\u83b7\u53d6\u9501\u5931\u8d25\u7684\u90a3\u4e9bRedis\u8282\u70b9\u540c\u6837\u53d1\u8d77\u8bf7\u6c42\u3002\u5b9e\u9645\u4e0a\uff0c\u8fd9\u79cd\u60c5\u51b5\u5728\u5f02\u6b65\u901a\u4fe1\u6a21\u578b\u4e2d\u662f\u6709\u53ef\u80fd\u53d1\u751f\u7684\uff1a\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u901a\u4fe1\u662f\u6b63\u5e38\u7684\uff0c\u4f46\u53cd\u65b9\u5411\u5374\u662f\u6709\u95ee\u9898\u7684\u3002<\/p>\n<h3>\u3010\u5176\u5b83\u7591\u95ee\u3011<\/h3>\n<p>\u524d\u9762\u5728\u8ba8\u8bba\u5355Redis\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u9501\u7684\u65f6\u5019\uff0c\u6700\u540e\u6211\u4eec\u63d0\u51fa\u4e86\u4e00\u4e2a\u7591\u95ee\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u957f\u671f\u963b\u585e\u5bfc\u81f4\u9501\u8fc7\u671f\uff0c\u90a3\u4e48\u5b83\u63a5\u4e0b\u6765\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u5c31\u4e0d\u5b89\u5168\u4e86\uff08\u6ca1\u6709\u4e86\u9501\u7684\u4fdd\u62a4\uff09\u3002\u8fd9\u4e2a\u95ee\u9898\u5728Redlock\u4e2d\u662f\u5426\u6709\u6240\u6539\u5584\u5462\uff1f\u663e\u7136\uff0c\u8fd9\u6837\u7684\u95ee\u9898\u5728Redlock\u4e2d\u662f\u4f9d\u7136\u5b58\u5728\u7684\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u5728\u7b97\u6cd5\u7b2c4\u6b65\u6210\u529f\u83b7\u53d6\u4e86\u9501\u4e4b\u540e\uff0c\u5982\u679c\u7531\u4e8e\u83b7\u53d6\u9501\u7684\u8fc7\u7a0b\u6d88\u8017\u4e86\u8f83\u957f\u65f6\u95f4\uff0c\u91cd\u65b0\u8ba1\u7b97\u51fa\u6765\u7684\u5269\u4f59\u7684\u9501\u6709\u6548\u65f6\u95f4\u5f88\u77ed\u4e86\uff0c\u90a3\u4e48\u6211\u4eec\u8fd8\u6765\u5f97\u53ca\u53bb\u5b8c\u6210\u5171\u4eab\u8d44\u6e90\u8bbf\u95ee\u5417\uff1f\u5982\u679c\u6211\u4eec\u8ba4\u4e3a\u592a\u77ed\uff0c\u662f\u4e0d\u662f\u5e94\u8be5\u7acb\u5373\u8fdb\u884c\u9501\u7684\u91ca\u653e\u64cd\u4f5c\uff1f\u90a3\u5230\u5e95\u591a\u77ed\u624d\u7b97\u5462\uff1f\u53c8\u662f\u4e00\u4e2a\u9009\u62e9\u96be\u9898\u3002<\/p>\n<h1>Martin\u7684\u5206\u6790<\/h1>\n<p>Martin Kleppmann\u57282016-02-08\u8fd9\u4e00\u5929\u53d1\u8868\u4e86\u4e00\u7bc7blog\uff0c\u540d\u5b57\u53eb\u201dHow to do distributed locking \u201c\uff0c\u5730\u5740\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li><a href=\"https:\/\/martin.kleppmann.com\/2016\/02\/08\/how-to-do-distributed-locking.html\">https:\/\/martin.kleppmann.com\/2016\/02\/08\/how-to-do-distributed-locking.html<\/a><\/li>\n<\/ul>\n<p>Martin\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u8c08\u53ca\u4e86\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5f88\u591a\u57fa\u7840\u6027\u7684\u95ee\u9898\uff08\u7279\u522b\u662f\u5206\u5e03\u5f0f\u8ba1\u7b97\u7684\u5f02\u6b65\u6a21\u578b\uff09\uff0c\u5bf9\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u4ece\u4e1a\u8005\u6765\u8bf4\u975e\u5e38\u503c\u5f97\u4e00\u8bfb\u3002\u8fd9\u7bc7\u6587\u7ae0\u5927\u4f53\u53ef\u4ee5\u5206\u4e3a\u4e24\u5927\u90e8\u5206\uff1a<\/p>\n<p>\u524d\u534a\u90e8\u5206\uff0c\u4e0eRedlock\u65e0\u5173\u3002Martin\u6307\u51fa\uff0c\u5373\u4f7f\u6211\u4eec\u62e5\u6709\u4e00\u4e2a\u5b8c\u7f8e\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\uff08\u5e26\u81ea\u52a8\u8fc7\u671f\u529f\u80fd\uff09\uff0c\u5728\u6ca1\u6709\u5171\u4eab\u8d44\u6e90\u53c2\u4e0e\u8fdb\u6765\u63d0\u4f9b\u67d0\u79cdfencing\u673a\u5236\u7684\u524d\u63d0\u4e0b\uff0c\u6211\u4eec\u4ecd\u7136\u4e0d\u53ef\u80fd\u83b7\u5f97\u8db3\u591f\u7684\u5b89\u5168\u6027\u3002<br \/>\n\u540e\u534a\u90e8\u5206\uff0c\u662f\u5bf9Redlock\u672c\u8eab\u7684\u6279\u8bc4\u3002Martin\u6307\u51fa\uff0c\u7531\u4e8eRedlock\u672c\u8d28\u4e0a\u662f\u5efa\u7acb\u5728\u4e00\u4e2a\u540c\u6b65\u6a21\u578b\u4e4b\u4e0a\uff0c\u5bf9\u7cfb\u7edf\u7684\u8bb0\u65f6\u5047\u8bbe(timing assumption)\u6709\u5f88\u5f3a\u7684\u8981\u6c42\uff0c\u56e0\u6b64\u672c\u8eab\u7684\u5b89\u5168\u6027\u662f\u4e0d\u591f\u7684\u3002<\/p>\n<p>\u9996\u5148\u6211\u4eec\u8ba8\u8bba\u4e00\u4e0b\u524d\u534a\u90e8\u5206\u7684\u5173\u952e\u70b9\u3002Martin\u7ed9\u51fa\u4e86\u4e0b\u9762\u8fd9\u6837\u4e00\u4efd\u65f6\u5e8f\u56fe\uff1a<\/p>\n<p><a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/unsafe-lock.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6737\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/unsafe-lock.png\" alt=\"\" width=\"1100\" height=\"400\" \/><\/a><\/p>\n<p>\u5728\u4e0a\u9762\u7684\u65f6\u5e8f\u56fe\u4e2d\uff0c\u5047\u8bbe\u9501\u670d\u52a1\u672c\u8eab\u662f\u6ca1\u6709\u95ee\u9898\u7684\uff0c\u5b83\u603b\u662f\u80fd\u4fdd\u8bc1\u4efb\u4e00\u65f6\u523b\u6700\u591a\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u83b7\u5f97\u9501\u3002\u4e0a\u56fe\u4e2d\u51fa\u73b0\u7684lease\u8fd9\u4e2a\u8bcd\u53ef\u4ee5\u6682\u4e14\u8ba4\u4e3a\u5c31\u7b49\u540c\u4e8e\u4e00\u4e2a\u5e26\u6709\u81ea\u52a8\u8fc7\u671f\u529f\u80fd\u7684\u9501\u3002\u5ba2\u6237\u7aef1\u5728\u83b7\u5f97\u9501\u4e4b\u540e\u53d1\u751f\u4e86\u5f88\u957f\u65f6\u95f4\u7684GC pause\uff0c\u5728\u6b64\u671f\u95f4\uff0c\u5b83\u83b7\u5f97\u7684\u9501\u8fc7\u671f\u4e86\uff0c\u800c\u5ba2\u6237\u7aef2\u83b7\u5f97\u4e86\u9501\u3002\u5f53\u5ba2\u6237\u7aef1\u4eceGC pause\u4e2d\u6062\u590d\u8fc7\u6765\u7684\u65f6\u5019\uff0c\u5b83\u4e0d\u77e5\u9053\u81ea\u5df1\u6301\u6709\u7684\u9501\u5df2\u7ecf\u8fc7\u671f\u4e86\uff0c\u5b83\u4f9d\u7136\u5411\u5171\u4eab\u8d44\u6e90\uff08\u4e0a\u56fe\u4e2d\u662f\u4e00\u4e2a\u5b58\u50a8\u670d\u52a1\uff09\u53d1\u8d77\u4e86\u5199\u6570\u636e\u8bf7\u6c42\uff0c\u800c\u8fd9\u65f6\u9501\u5b9e\u9645\u4e0a\u88ab\u5ba2\u6237\u7aef2\u6301\u6709\uff0c\u56e0\u6b64\u4e24\u4e2a\u5ba2\u6237\u7aef\u7684\u5199\u8bf7\u6c42\u5c31\u6709\u53ef\u80fd\u51b2\u7a81\uff08\u9501\u7684\u4e92\u65a5\u4f5c\u7528\u5931\u6548\u4e86\uff09\u3002<\/p>\n<p>\u521d\u770b\u4e0a\u53bb\uff0c\u6709\u4eba\u53ef\u80fd\u4f1a\u8bf4\uff0c\u65e2\u7136\u5ba2\u6237\u7aef1\u4eceGC pause\u4e2d\u6062\u590d\u8fc7\u6765\u4ee5\u540e\u4e0d\u77e5\u9053\u81ea\u5df1\u6301\u6709\u7684\u9501\u5df2\u7ecf\u8fc7\u671f\u4e86\uff0c\u90a3\u4e48\u5b83\u53ef\u4ee5\u5728\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u4e4b\u524d\u5148\u5224\u65ad\u4e00\u4e0b\u9501\u662f\u5426\u8fc7\u671f\u3002\u4f46\u4ed4\u7ec6\u60f3\u60f3\uff0c\u8fd9\u4e1d\u6beb\u4e5f\u6ca1\u6709\u5e2e\u52a9\u3002\u56e0\u4e3aGC pause\u53ef\u80fd\u53d1\u751f\u5728\u4efb\u610f\u65f6\u523b\uff0c\u4e5f\u8bb8\u6070\u597d\u5728\u5224\u65ad\u5b8c\u4e4b\u540e\u3002<\/p>\n<p>\u4e5f\u6709\u4eba\u4f1a\u8bf4\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u4f7f\u7528\u6ca1\u6709GC\u7684\u8bed\u8a00\u6765\u5b9e\u73b0\uff0c\u662f\u4e0d\u662f\u5c31\u6ca1\u6709\u8fd9\u4e2a\u95ee\u9898\u5462\uff1fMartin\u6307\u51fa\uff0c\u7cfb\u7edf\u73af\u5883\u592a\u590d\u6742\uff0c\u4ecd\u7136\u6709\u5f88\u591a\u539f\u56e0\u5bfc\u81f4\u8fdb\u7a0b\u7684pause\uff0c\u6bd4\u5982\u865a\u5b58\u9020\u6210\u7684\u7f3a\u9875\u6545\u969c(page fault)\uff0c\u518d\u6bd4\u5982CPU\u8d44\u6e90\u7684\u7ade\u4e89\u3002\u5373\u4f7f\u4e0d\u8003\u8651\u8fdb\u7a0bpause\u7684\u60c5\u51b5\uff0c\u7f51\u7edc\u5ef6\u8fdf\u4e5f\u4ecd\u7136\u4f1a\u9020\u6210\u7c7b\u4f3c\u7684\u7ed3\u679c\u3002<\/p>\n<p>\u603b\u7ed3\u8d77\u6765\u5c31\u662f\u8bf4\uff0c\u5373\u4f7f\u9501\u670d\u52a1\u672c\u8eab\u662f\u6ca1\u6709\u95ee\u9898\u7684\uff0c\u800c\u4ec5\u4ec5\u662f\u5ba2\u6237\u7aef\u6709\u957f\u65f6\u95f4\u7684pause\u6216\u7f51\u7edc\u5ef6\u8fdf\uff0c\u4ecd\u7136\u4f1a\u9020\u6210\u4e24\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u7684\u51b2\u7a81\u60c5\u51b5\u53d1\u751f\u3002\u800c\u8fd9\u79cd\u60c5\u51b5\u5176\u5b9e\u5c31\u662f\u6211\u4eec\u5728\u524d\u9762\u5df2\u7ecf\u63d0\u51fa\u6765\u7684\u201c\u5ba2\u6237\u7aef\u957f\u671f\u963b\u585e\u5bfc\u81f4\u9501\u8fc7\u671f\u201d\u7684\u90a3\u4e2a\u7591\u95ee\u3002<\/p>\n<p>\u90a3\u600e\u4e48\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1fMartin\u7ed9\u51fa\u4e86\u4e00\u79cd\u65b9\u6cd5\uff0c\u79f0\u4e3afencing token\u3002fencing token\u662f\u4e00\u4e2a\u5355\u8c03\u9012\u589e\u7684\u6570\u5b57\uff0c\u5f53\u5ba2\u6237\u7aef\u6210\u529f\u83b7\u53d6\u9501\u7684\u65f6\u5019\u5b83\u968f\u540c\u9501\u4e00\u8d77\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002\u800c\u5ba2\u6237\u7aef\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u7684\u65f6\u5019\u5e26\u7740\u8fd9\u4e2afencing token\uff0c\u8fd9\u6837\u63d0\u4f9b\u5171\u4eab\u8d44\u6e90\u7684\u670d\u52a1\u5c31\u80fd\u6839\u636e\u5b83\u8fdb\u884c\u68c0\u67e5\uff0c\u62d2\u7edd\u6389\u5ef6\u8fdf\u5230\u6765\u7684\u8bbf\u95ee\u8bf7\u6c42\uff08\u907f\u514d\u4e86\u51b2\u7a81\uff09\u3002\u5982\u4e0b\u56fe\uff1a<\/p>\n<p><a href=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/fencing-tokens.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6738\" src=\"https:\/\/kyle.ai\/blog\/wp-content\/uploads\/2018\/09\/fencing-tokens.png\" alt=\"\" width=\"1100\" height=\"400\" \/><\/a><\/p>\n<p>\u5728\u4e0a\u56fe\u4e2d\uff0c\u5ba2\u6237\u7aef1\u5148\u83b7\u53d6\u5230\u7684\u9501\uff0c\u56e0\u6b64\u6709\u4e00\u4e2a\u8f83\u5c0f\u7684fencing token\uff0c\u7b49\u4e8e33\uff0c\u800c\u5ba2\u6237\u7aef2\u540e\u83b7\u53d6\u5230\u7684\u9501\uff0c\u6709\u4e00\u4e2a\u8f83\u5927\u7684fencing token\uff0c\u7b49\u4e8e34\u3002\u5ba2\u6237\u7aef1\u4eceGC pause\u4e2d\u6062\u590d\u8fc7\u6765\u4e4b\u540e\uff0c\u4f9d\u7136\u662f\u5411\u5b58\u50a8\u670d\u52a1\u53d1\u9001\u8bbf\u95ee\u8bf7\u6c42\uff0c\u4f46\u662f\u5e26\u4e86fencing token = 33\u3002\u5b58\u50a8\u670d\u52a1\u53d1\u73b0\u5b83\u4e4b\u524d\u5df2\u7ecf\u5904\u7406\u8fc734\u7684\u8bf7\u6c42\uff0c\u6240\u4ee5\u4f1a\u62d2\u7edd\u6389\u8fd9\u6b2133\u7684\u8bf7\u6c42\u3002\u8fd9\u6837\u5c31\u907f\u514d\u4e86\u51b2\u7a81\u3002<\/p>\n<p>\u73b0\u5728\u6211\u4eec\u518d\u8ba8\u8bba\u4e00\u4e0bMartin\u7684\u6587\u7ae0\u7684\u540e\u534a\u90e8\u5206\u3002<\/p>\n<p>Martin\u5728\u6587\u4e2d\u6784\u9020\u4e86\u4e00\u4e9b\u4e8b\u4ef6\u5e8f\u5217\uff0c\u80fd\u591f\u8ba9Redlock\u5931\u6548\uff08\u4e24\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u6301\u6709\u9501\uff09\u3002\u4e3a\u4e86\u8bf4\u660eRedlock\u5bf9\u7cfb\u7edf\u8bb0\u65f6(timing)\u7684\u8fc7\u5206\u4f9d\u8d56\uff0c\u4ed6\u9996\u5148\u7ed9\u51fa\u4e86\u4e0b\u9762\u7684\u4e00\u4e2a\u4f8b\u5b50\uff08\u8fd8\u662f\u5047\u8bbe\u67095\u4e2aRedis\u8282\u70b9A, B, C, D, E\uff09\uff1a<\/p>\n<ol>\n<li>\u5ba2\u6237\u7aef1\u4eceRedis\u8282\u70b9A, B, C\u6210\u529f\u83b7\u53d6\u4e86\u9501\uff08\u591a\u6570\u8282\u70b9\uff09\u3002\u7531\u4e8e\u7f51\u7edc\u95ee\u9898\uff0c\u4e0eD\u548cE\u901a\u4fe1\u5931\u8d25\u3002<\/li>\n<li>\u8282\u70b9C\u4e0a\u7684\u65f6\u949f\u53d1\u751f\u4e86\u5411\u524d\u8df3\u8dc3\uff0c\u5bfc\u81f4\u5b83\u4e0a\u9762\u7ef4\u62a4\u7684\u9501\u5feb\u901f\u8fc7\u671f\u3002<\/li>\n<li>\u5ba2\u6237\u7aef2\u4eceRedis\u8282\u70b9C, D, E\u6210\u529f\u83b7\u53d6\u4e86\u540c\u4e00\u4e2a\u8d44\u6e90\u7684\u9501\uff08\u591a\u6570\u8282\u70b9\uff09\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u548c\u5ba2\u6237\u7aef2\u73b0\u5728\u90fd\u8ba4\u4e3a\u81ea\u5df1\u6301\u6709\u4e86\u9501\u3002<\/li>\n<\/ol>\n<p>\u4e0a\u9762\u8fd9\u79cd\u60c5\u51b5\u4e4b\u6240\u4ee5\u6709\u53ef\u80fd\u53d1\u751f\uff0c\u672c\u8d28\u4e0a\u662f\u56e0\u4e3aRedlock\u7684\u5b89\u5168\u6027(safety property)\u5bf9\u7cfb\u7edf\u7684\u65f6\u949f\u6709\u6bd4\u8f83\u5f3a\u7684\u4f9d\u8d56\uff0c\u4e00\u65e6\u7cfb\u7edf\u7684\u65f6\u949f\u53d8\u5f97\u4e0d\u51c6\u786e\uff0c\u7b97\u6cd5\u7684\u5b89\u5168\u6027\u4e5f\u5c31\u4fdd\u8bc1\u4e0d\u4e86\u4e86\u3002Martin\u5728\u8fd9\u91cc\u5176\u5b9e\u662f\u8981\u6307\u51fa\u5206\u5e03\u5f0f\u7b97\u6cd5\u7814\u7a76\u4e2d\u7684\u4e00\u4e9b\u57fa\u7840\u6027\u95ee\u9898\uff0c\u6216\u8005\u8bf4\u4e00\u4e9b\u5e38\u8bc6\u95ee\u9898\uff0c\u5373\u597d\u7684\u5206\u5e03\u5f0f\u7b97\u6cd5\u5e94\u8be5\u57fa\u4e8e\u5f02\u6b65\u6a21\u578b(asynchronous model)\uff0c\u7b97\u6cd5\u7684\u5b89\u5168\u6027\u4e0d\u5e94\u8be5\u4f9d\u8d56\u4e8e\u4efb\u4f55\u8bb0\u65f6\u5047\u8bbe(timing assumption)\u3002\u5728\u5f02\u6b65\u6a21\u578b\u4e2d\uff1a\u8fdb\u7a0b\u53ef\u80fdpause\u4efb\u610f\u957f\u7684\u65f6\u95f4\uff0c\u6d88\u606f\u53ef\u80fd\u5728\u7f51\u7edc\u4e2d\u5ef6\u8fdf\u4efb\u610f\u957f\u7684\u65f6\u95f4\uff0c\u751a\u81f3\u4e22\u5931\uff0c\u7cfb\u7edf\u65f6\u949f\u4e5f\u53ef\u80fd\u4ee5\u4efb\u610f\u65b9\u5f0f\u51fa\u9519\u3002\u4e00\u4e2a\u597d\u7684\u5206\u5e03\u5f0f\u7b97\u6cd5\uff0c\u8fd9\u4e9b\u56e0\u7d20\u4e0d\u5e94\u8be5\u5f71\u54cd\u5b83\u7684\u5b89\u5168\u6027(safety property)\uff0c\u53ea\u53ef\u80fd\u5f71\u54cd\u5230\u5b83\u7684\u6d3b\u6027(liveness property)\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5373\u4f7f\u5728\u975e\u5e38\u6781\u7aef\u7684\u60c5\u51b5\u4e0b\uff08\u6bd4\u5982\u7cfb\u7edf\u65f6\u949f\u4e25\u91cd\u9519\u8bef\uff09\uff0c\u7b97\u6cd5\u9876\u591a\u662f\u4e0d\u80fd\u5728\u6709\u9650\u7684\u65f6\u95f4\u5185\u7ed9\u51fa\u7ed3\u679c\u800c\u5df2\uff0c\u800c\u4e0d\u5e94\u8be5\u7ed9\u51fa\u9519\u8bef\u7684\u7ed3\u679c\u3002\u8fd9\u6837\u7684\u7b97\u6cd5\u5728\u73b0\u5b9e\u4e2d\u662f\u5b58\u5728\u7684\uff0c\u50cf\u6bd4\u8f83\u8457\u540d\u7684Paxos\uff0c\u6216Raft\u3002\u4f46\u663e\u7136\u6309\u8fd9\u4e2a\u6807\u51c6\u7684\u8bdd\uff0cRedlock\u7684\u5b89\u5168\u6027\u7ea7\u522b\u662f\u8fbe\u4e0d\u5230\u7684\u3002<\/p>\n<p>\u968f\u540e\uff0cMartin\u89c9\u5f97\u524d\u9762\u8fd9\u4e2a\u65f6\u949f\u8df3\u8dc3\u7684\u4f8b\u5b50\u8fd8\u4e0d\u591f\uff0c\u53c8\u7ed9\u51fa\u4e86\u4e00\u4e2a\u7531\u5ba2\u6237\u7aefGC pause\u5f15\u53d1Redlock\u5931\u6548\u7684\u4f8b\u5b50\u3002\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u5ba2\u6237\u7aef1\u5411Redis\u8282\u70b9A, B, C, D, E\u53d1\u8d77\u9501\u8bf7\u6c42\u3002<\/li>\n<li>\u5404\u4e2aRedis\u8282\u70b9\u5df2\u7ecf\u628a\u8bf7\u6c42\u7ed3\u679c\u8fd4\u56de\u7ed9\u4e86\u5ba2\u6237\u7aef1\uff0c\u4f46\u5ba2\u6237\u7aef1\u5728\u6536\u5230\u8bf7\u6c42\u7ed3\u679c\u4e4b\u524d\u8fdb\u5165\u4e86\u957f\u65f6\u95f4\u7684GC pause\u3002<\/li>\n<li>\u5728\u6240\u6709\u7684Redis\u8282\u70b9\u4e0a\uff0c\u9501\u8fc7\u671f\u4e86\u3002<\/li>\n<li>\u5ba2\u6237\u7aef2\u5728A, B, C, D, E\u4e0a\u83b7\u53d6\u5230\u4e86\u9501\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u4eceGC pause\u4ece\u6062\u590d\uff0c\u6536\u5230\u4e86\u524d\u9762\u7b2c2\u6b65\u6765\u81ea\u5404\u4e2aRedis\u8282\u70b9\u7684\u8bf7\u6c42\u7ed3\u679c\u3002\u5ba2\u6237\u7aef1\u8ba4\u4e3a\u81ea\u5df1\u6210\u529f\u83b7\u53d6\u5230\u4e86\u9501\u3002<\/li>\n<li>\u5ba2\u6237\u7aef1\u548c\u5ba2\u6237\u7aef2\u73b0\u5728\u90fd\u8ba4\u4e3a\u81ea\u5df1\u6301\u6709\u4e86\u9501\u3002<\/li>\n<\/ol>\n<p>Martin\u7ed9\u51fa\u7684\u8fd9\u4e2a\u4f8b\u5b50\u5176\u5b9e\u6709\u70b9\u5c0f\u95ee\u9898\u3002\u5728Redlock\u7b97\u6cd5\u4e2d\uff0c\u5ba2\u6237\u7aef\u5728\u5b8c\u6210\u5411\u5404\u4e2aRedis\u8282\u70b9\u7684\u83b7\u53d6\u9501\u7684\u8bf7\u6c42\u4e4b\u540e\uff0c\u4f1a\u8ba1\u7b97\u8fd9\u4e2a\u8fc7\u7a0b\u6d88\u8017\u7684\u65f6\u95f4\uff0c\u7136\u540e\u68c0\u67e5\u662f\u4e0d\u662f\u8d85\u8fc7\u4e86\u9501\u7684\u6709\u6548\u65f6\u95f4(lock validity time)\u3002\u4e5f\u5c31\u662f\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\u7b2c5\u6b65\uff0c\u5ba2\u6237\u7aef1\u4eceGC pause\u4e2d\u6062\u590d\u8fc7\u6765\u4ee5\u540e\uff0c\u5b83\u4f1a\u901a\u8fc7\u8fd9\u4e2a\u68c0\u67e5\u53d1\u73b0\u9501\u5df2\u7ecf\u8fc7\u671f\u4e86\uff0c\u4e0d\u4f1a\u518d\u8ba4\u4e3a\u81ea\u5df1\u6210\u529f\u83b7\u53d6\u5230\u9501\u4e86\u3002\u968f\u540eantirez\u5728\u4ed6\u7684\u53cd\u9a73\u6587\u7ae0\u4e2d\u5c31\u6307\u51fa\u6765\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46Martin\u8ba4\u4e3a\u8fd9\u4e2a\u7ec6\u8282\u5bf9Redlock\u6574\u4f53\u7684\u5b89\u5168\u6027\u6ca1\u6709\u672c\u8d28\u7684\u5f71\u54cd\u3002<\/p>\n<p>\u629b\u5f00\u8fd9\u4e2a\u7ec6\u8282\uff0c\u6211\u4eec\u53ef\u4ee5\u5206\u6790\u4e00\u4e0bMartin\u4e3e\u8fd9\u4e2a\u4f8b\u5b50\u7684\u610f\u56fe\u5728\u54ea\u3002\u521d\u770b\u8d77\u6765\uff0c\u8fd9\u4e2a\u4f8b\u5b50\u8ddf\u6587\u7ae0\u524d\u534a\u90e8\u5206\u5206\u6790\u901a\u7528\u7684\u5206\u5e03\u5f0f\u9501\u65f6\u7ed9\u51fa\u7684GC pause\u7684\u65f6\u5e8f\u56fe\u662f\u57fa\u672c\u4e00\u6837\u7684\uff0c\u53ea\u4e0d\u8fc7\u90a3\u91cc\u7684GC pause\u53d1\u751f\u5728\u5ba2\u6237\u7aef1\u83b7\u5f97\u4e86\u9501\u4e4b\u540e\uff0c\u800c\u8fd9\u91cc\u7684GC pause\u53d1\u751f\u5728\u5ba2\u6237\u7aef1\u83b7\u5f97\u9501\u4e4b\u524d\u3002\u4f46\u4e24\u4e2a\u4f8b\u5b50\u7684\u4fa7\u91cd\u70b9\u4e0d\u592a\u4e00\u6837\u3002Martin\u6784\u9020\u8fd9\u91cc\u7684\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u662f\u4e3a\u4e86\u5f3a\u8c03\u5728\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684\u5f02\u6b65\u73af\u5883\u4e0b\uff0c\u957f\u65f6\u95f4\u7684GC pause\u6216\u6d88\u606f\u5ef6\u8fdf\uff08\u4e0a\u9762\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u628aGC pause\u6362\u6210Redis\u8282\u70b9\u548c\u5ba2\u6237\u7aef1\u4e4b\u95f4\u7684\u6d88\u606f\u5ef6\u8fdf\uff0c\u903b\u8f91\u4e0d\u53d8\uff09\uff0c\u4f1a\u8ba9\u5ba2\u6237\u7aef\u83b7\u5f97\u4e00\u4e2a\u5df2\u7ecf\u8fc7\u671f\u7684\u9501\u3002\u4ece\u5ba2\u6237\u7aef1\u7684\u89d2\u5ea6\u770b\uff0cRedlock\u7684\u5b89\u5168\u6027\u88ab\u6253\u7834\u4e86\uff0c\u56e0\u4e3a\u5ba2\u6237\u7aef1\u6536\u5230\u9501\u7684\u65f6\u5019\uff0c\u8fd9\u4e2a\u9501\u5df2\u7ecf\u5931\u6548\u4e86\uff0c\u800cRedlock\u540c\u65f6\u8fd8\u628a\u8fd9\u4e2a\u9501\u5206\u914d\u7ed9\u4e86\u5ba2\u6237\u7aef2\u3002\u6362\u53e5\u8bdd\u8bf4\uff0cRedis\u670d\u52a1\u5668\u5728\u628a\u9501\u5206\u53d1\u7ed9\u5ba2\u6237\u7aef\u7684\u9014\u4e2d\uff0c\u9501\u5c31\u8fc7\u671f\u4e86\uff0c\u4f46\u53c8\u6ca1\u6709\u6709\u6548\u7684\u673a\u5236\u8ba9\u5ba2\u6237\u7aef\u660e\u786e\u77e5\u9053\u8fd9\u4e2a\u95ee\u9898\u3002\u800c\u5728\u4e4b\u524d\u7684\u90a3\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5ba2\u6237\u7aef1\u6536\u5230\u9501\u7684\u65f6\u5019\u9501\u8fd8\u662f\u6709\u6548\u7684\uff0c\u9501\u670d\u52a1\u672c\u8eab\u7684\u5b89\u5168\u6027\u53ef\u4ee5\u8ba4\u4e3a\u6ca1\u6709\u88ab\u6253\u7834\uff0c\u540e\u9762\u867d\u7136\u4e5f\u51fa\u4e86\u95ee\u9898\uff0c\u4f46\u95ee\u9898\u662f\u51fa\u5728\u5ba2\u6237\u7aef1\u548c\u5171\u4eab\u8d44\u6e90\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u4ea4\u4e92\u4e0a\u3002<\/p>\n<p>\u5728Martin\u7684\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u8fd8\u6709\u4e00\u4e2a\u5f88\u6709\u89c1\u5730\u7684\u89c2\u70b9\uff0c\u5c31\u662f\u5bf9\u9501\u7684\u7528\u9014\u7684\u533a\u5206\u3002\u4ed6\u628a\u9501\u7684\u7528\u9014\u5206\u4e3a\u4e24\u79cd\uff1a<\/p>\n<ul>\n<li>\u4e3a\u4e86\u6548\u7387(efficiency)\uff0c\u534f\u8c03\u5404\u4e2a\u5ba2\u6237\u7aef\u907f\u514d\u505a\u91cd\u590d\u7684\u5de5\u4f5c\u3002\u5373\u4f7f\u9501\u5076\u5c14\u5931\u6548\u4e86\uff0c\u53ea\u662f\u53ef\u80fd\u628a\u67d0\u4e9b\u64cd\u4f5c\u591a\u505a\u4e00\u904d\u800c\u5df2\uff0c\u4e0d\u4f1a\u4ea7\u751f\u5176\u5b83\u7684\u4e0d\u826f\u540e\u679c\u3002\u6bd4\u5982\u91cd\u590d\u53d1\u9001\u4e86\u4e00\u5c01\u540c\u6837\u7684email\u3002<\/li>\n<li>\u4e3a\u4e86\u6b63\u786e\u6027(correctness)\u3002\u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\u90fd\u4e0d\u5141\u8bb8\u9501\u5931\u6548\u7684\u60c5\u51b5\u53d1\u751f\uff0c\u56e0\u4e3a\u4e00\u65e6\u53d1\u751f\uff0c\u5c31\u53ef\u80fd\u610f\u5473\u7740\u6570\u636e\u4e0d\u4e00\u81f4(inconsistency)\uff0c\u6570\u636e\u4e22\u5931\uff0c\u6587\u4ef6\u635f\u574f\uff0c\u6216\u8005\u5176\u5b83\u4e25\u91cd\u7684\u95ee\u9898\u3002<\/li>\n<\/ul>\n<p>\u6700\u540e\uff0cMartin\u5f97\u51fa\u4e86\u5982\u4e0b\u7684\u7ed3\u8bba\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u662f\u4e3a\u4e86\u6548\u7387(efficiency)\u800c\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\uff0c\u5141\u8bb8\u9501\u7684\u5076\u5c14\u5931\u6548\uff0c\u90a3\u4e48\u4f7f\u7528\u5355Redis\u8282\u70b9\u7684\u9501\u65b9\u6848\u5c31\u8db3\u591f\u4e86\uff0c\u7b80\u5355\u800c\u4e14\u6548\u7387\u9ad8\u3002Redlock\u5219\u662f\u4e2a\u8fc7\u91cd\u7684\u5b9e\u73b0(heavyweight)\u3002<\/li>\n<li>\u5982\u679c\u662f\u4e3a\u4e86\u6b63\u786e\u6027(correctness)\u5728\u5f88\u4e25\u8083\u7684\u573a\u5408\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\uff0c\u90a3\u4e48\u4e0d\u8981\u4f7f\u7528Redlock\u3002\u5b83\u4e0d\u662f\u5efa\u7acb\u5728\u5f02\u6b65\u6a21\u578b\u4e0a\u7684\u4e00\u4e2a\u8db3\u591f\u5f3a\u7684\u7b97\u6cd5\uff0c\u5b83\u5bf9\u4e8e\u7cfb\u7edf\u6a21\u578b\u7684\u5047\u8bbe\u4e2d\u5305\u542b\u5f88\u591a\u5371\u9669\u7684\u6210\u5206(\u5bf9\u4e8etiming)\u3002\u800c\u4e14\uff0c\u5b83\u6ca1\u6709\u4e00\u4e2a\u673a\u5236\u80fd\u591f\u63d0\u4f9bfencing token\u3002\u90a3\u5e94\u8be5\u4f7f\u7528\u4ec0\u4e48\u6280\u672f\u5462\uff1fMartin\u8ba4\u4e3a\uff0c\u5e94\u8be5\u8003\u8651\u7c7b\u4f3cZookeeper\u7684\u65b9\u6848\uff0c\u6216\u8005\u652f\u6301\u4e8b\u52a1\u7684\u6570\u636e\u5e93\u3002<\/li>\n<\/ul>\n<p>Martin\u5bf9Redlock\u7b97\u6cd5\u7684\u5f62\u5bb9\u662f\uff1a<\/p>\n<blockquote><p>neither fish nor fowl \uff08\u975e\u9a74\u975e\u9a6c\uff09<\/p><\/blockquote>\n<h3>\u3010\u5176\u5b83\u7591\u95ee\u3011<\/h3>\n<ul>\n<li>Martin\u63d0\u51fa\u7684fencing token\u7684\u65b9\u6848\uff0c\u9700\u8981\u5bf9\u63d0\u4f9b\u5171\u4eab\u8d44\u6e90\u7684\u670d\u52a1\u8fdb\u884c\u4fee\u6539\uff0c\u8fd9\u5728\u73b0\u5b9e\u4e2d\u53ef\u884c\u5417\uff1f<\/li>\n<li>\u6839\u636eMartin\u7684\u8bf4\u6cd5\uff0c\u770b\u8d77\u6765\uff0c\u5982\u679c\u8d44\u6e90\u670d\u52a1\u5668\u5b9e\u73b0\u4e86fencing token\uff0c\u5b83\u5728\u5206\u5e03\u5f0f\u9501\u5931\u6548\u7684\u60c5\u51b5\u4e0b\u4e5f\u4ecd\u7136\u80fd\u4fdd\u6301\u8d44\u6e90\u7684\u4e92\u65a5\u8bbf\u95ee\u3002\u8fd9\u662f\u4e0d\u662f\u610f\u5473\u7740\u5206\u5e03\u5f0f\u9501\u6839\u672c\u6ca1\u6709\u5b58\u5728\u7684\u610f\u4e49\u4e86\uff1f<\/li>\n<li>\u8d44\u6e90\u670d\u52a1\u5668\u9700\u8981\u68c0\u67e5fencing token\u7684\u5927\u5c0f\uff0c\u5982\u679c\u63d0\u4f9b\u8d44\u6e90\u8bbf\u95ee\u7684\u670d\u52a1\u4e5f\u662f\u5305\u542b\u591a\u4e2a\u8282\u70b9\u7684\uff08\u5206\u5e03\u5f0f\u7684\uff09\uff0c\u90a3\u4e48\u8fd9\u91cc\u600e\u4e48\u68c0\u67e5\u624d\u80fd\u4fdd\u8bc1fencing token\u5728\u591a\u4e2a\u8282\u70b9\u4e0a\u662f\u9012\u589e\u7684\u5462\uff1f<\/li>\n<li>Martin\u5bf9\u4e8efencing token\u7684\u4e3e\u4f8b\u4e2d\uff0c\u4e24\u4e2afencing token\u5230\u8fbe\u8d44\u6e90\u670d\u52a1\u5668\u7684\u987a\u5e8f\u98a0\u5012\u4e86\uff08\u5c0f\u7684fencing 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\u53c2\u8003\u94fe\u63a5\uff1a Redis  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-6724","post","type-post","status-publish","format-standard","hentry","category-diary"],"_links":{"self":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/6724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/comments?post=6724"}],"version-history":[{"count":2,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/6724\/revisions"}],"predecessor-version":[{"id":6741,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/6724\/revisions\/6741"}],"wp:attachment":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/media?parent=6724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/categories?post=6724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/tags?post=6724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}