{"id":1480,"date":"2017-02-26T19:21:58","date_gmt":"2017-02-26T11:21:58","guid":{"rendered":"http:\/\/coderbee.net\/?p=1480"},"modified":"2017-02-26T19:21:58","modified_gmt":"2017-02-26T11:21:58","slug":"%e5%9f%ba%e4%ba%8eredis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/concurrent\/20170226\/1480","title":{"rendered":"\u57fa\u4e8eRedis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501"},"content":{"rendered":"<h2>\u7528\u5355\u5b9e\u4f8b\u7684\u6b63\u786e\u5b9e\u73b0<\/h2>\n<p>\u547d\u4ee4\uff1a<code>set resource_name my_random_value NX PX timeout_millis<\/code>\uff0c\u5728 key <code>resource_name<\/code> \u4e0d\u5b58\u5728\u65f6\uff08<code>NX<\/code>\u9009\u9879\u7684\u4f5c\u7528\uff09\u8bbe\u7f6e\u8fd9\u4e2akey \u7684\u503c\u4e3a <code>my_random_value<\/code>\u3001\u8d85\u65f6\u65f6\u95f4\u8bbe\u4e3a <code>timeout_millis<\/code>\uff08<code>PX<\/code>\u9009\u9879\u7684\u4f5c\u7528\uff09\u3002<\/p>\n<p>\u5220\u9664key\u7684\u65f6\u5019\u7528 Lua \u811a\u672c\u6765\u68c0\u6d4bkey\u7684\u503c\u662f\u5426\u4e3a <code>my_random_value<\/code>\uff0c\u662f\u624d\u5141\u8bb8\u5220\u9664\uff1b\u9700\u8981\u4fdd\u8bc1\u8fd9\u4e2a\u503c\u5728\u6240\u6709\u5ba2\u6237\u7aef\u91cc\u552f\u4e00\uff1b\uff08\u501f\u52a9 Lua \u5b9e\u73b0\u4e00\u4e2a CAS \u64cd\u4f5c\uff09<\/p>\n<h3>\u4e00\u4e9b\u6ce8\u610f\u70b9\u4e0e\u95ee\u9898<\/h3>\n<ul>\n<li>\n<p>\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501\u5fc5\u987b\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\uff0c\u5426\u5219\u4e00\u65e6\u67d0\u4e2a\u5ba2\u6237\u7aef\u83b7\u53d6\u9501\u6210\u529f\u540e\u4e0e Redis \u65e0\u6cd5\u901a\u4fe1\uff0c\u90a3\u4e48\u5b83\u4f1a\u4e00\u76f4\u6301\u6709\u8fd9\u4e2a\u9501\uff0c\u5176\u4ed6\u5ba2\u6237\u7aef\u65e0\u6cd5\u83b7\u5f97\u9501\u3002<br \/>\n\u8fd9\u4e2a\u8fc7\u671f\u65f6\u95f4\u53eb\u505a\u9501\u7684\u6709\u6548\u65f6\u95f4\uff08lock validity time\uff09\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u5728\u8fd9\u4e2a\u65f6\u95f4\u5185\u5b8c\u6210\u5bf9\u8d44\u6e90\u7684\u8bbf\u95ee\u64cd\u4f5c\u3002<\/p>\n<\/li>\n<li>\n<p>\u8bbe\u7f6ekey\u4e0e\u8d85\u65f6\u65f6\u95f4\u5fc5\u987b\u5728\u4e00\u4e2a\u547d\u4ee4\u91cc\u5b8c\u6210\u3002\u5982\u679c\u5ba2\u6237\u7aef\u5728\u8bbe\u7f6e\u4e86key\u540e\u3001\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u524d\u5d29\u6e83\uff0c\u90a3\u4e48\u5b83\u4f1a\u4e00\u76f4\u6301\u6709\u8fd9\u4e2a\u9501\u3002<\/p>\n<\/li>\n<li>\n<p>\u91ca\u653e\u9501\u65f6\u5fc5\u987b\u68c0\u67e5key\u5bf9\u5e94\u7684\u503c\u662f\u5426\u4e0e\u81ea\u5df1\u6301\u6709\u7684\u4e00\u81f4\uff08\u901a\u8fc7 Lua \u5b9e\u73b0CAS\uff09\uff0c\u9632\u6b62\u8bef\u5220\u5176\u4ed6\u5ba2\u6237\u7aef\u6301\u6709\u7684\u9501\u3002\u9632\u6b62\u51fa\u73b0\uff1a\u5ba2\u6237\u7aefA\u51c6\u5907\u91ca\u653e\u6301\u6709\u7684\u9501\u65f6\uff0c\u68c0\u6d4b\u5230\u503c\u4e0e\u81ea\u5df1\u6301\u6709\u7684\u4e00\u81f4\uff0c\u7136\u540e\u7531\u4e8e\u67d0\u79cd\u539f\u56e0\u88ab\u957f\u65f6\u95f4\u963b\u585e\uff0c\u9501\u7684\u8d85\u65f6\u65f6\u95f4\u5230\u8fbe\u540e\u5ba2\u6237\u7aefB\u83b7\u53d6\u4e86\u9501\uff0c\u6b64\u65f6\u5ba2\u6237\u7aefA\u6267\u884c\u4e0d\u68c0\u67e5key\u503c\u7684\u5220\u9664\u64cd\u4f5c\u5c31\u4f1a\u7834\u574f\u4e86\u9501\u3002<\/p>\n<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<ul>\n<li>\n<p>\u5f02\u6b65\u4e3b\u4ece\u590d\u5236\u95ee\u9898\u3002Redis\u7684\u590d\u5236\u662f\u5f02\u6b65\u7684\uff0c\u5728\u4e3b\u4ece\u6a21\u5f0f\u4e0b\uff0c\u5ba2\u6237\u7aefA\u5728 master \u8282\u70b9\u62ff\u5230\u4e86\u9501\uff0cmaster \u8282\u70b9\u5728\u628aA\u521b\u5efa\u7684\u9501\u7684key\u5199\u5165slave\u4e4b\u524d\u5b95\u673a\u4e86\uff0cslave\u53d8\u6210\u4e86master\uff0c\u5ba2\u6237\u7aefB\u4ece\u65b0\u7684master\u62ff\u5230\u4e86\u548cA\u6301\u6709\u7684\u76f8\u540c\u7684\u9501\uff08\u56e0\u4e3a\u539f\u6765\u7684slave\u91cc\u8fd8\u6ca1\u6709A\u6301\u6709\u7684\u9501\u7684\u4fe1\u606f\uff09\uff0c\u8fd9\u79cd\u60c5\u51b5\u662f\u5355\u8282\u70b9\u5b9e\u73b0\u65e0\u6cd5\u89e3\u51b3\u7684\u3002<\/p>\n<\/li>\n<li>\n<p>\u9501\u6709\u6548\u65f6\u95f4\u7684\u8bbe\u7f6e\u591a\u957f\u6bd4\u8f83\u5408\u9002\uff1f\u5982\u679c\u8bbe\u7f6e\u592a\u77ed\uff0c\u9501\u53ef\u80fd\u5728\u5ba2\u6237\u7aef\u5b8c\u6210\u5bf9\u8d44\u6e90\u7684\u8bbf\u95ee\u4e4b\u524d\u5c31\u8fc7\u671f\uff0c\u4ece\u800c\u5931\u53bb\u4fdd\u62a4\uff1b\u5982\u679c\u8bbe\u7f6e\u592a\u957f\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\u4ed6\u5ba2\u6237\u7aef\u90fd\u65e0\u6cd5\u83b7\u53d6\u9501\uff0c\u4ece\u800c\u4f7f\u7cfb\u7edf\u957f\u65f6\u95f4\u65e0\u6cd5\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<\/li>\n<li>\n<p>\u5ba2\u6237\u7aefA\u518d\u83b7\u5f97\u9501\u540e\u53d1\u751f\u4e86\u963b\u585e\uff08\u6bd4\u5982\u56e0\u4e3aGC\u3001CPU\u7ade\u4e89\u3001\u865a\u5b58\u7684\u7f3a\u9875\u6545\u969c\u3001\u7f51\u7edc\u5ef6\u65f6\u7b49\uff09\uff0c\u5b83\u83b7\u5f97\u7684\u9501\u8fc7\u671f\u4e86\uff0c\u5ba2\u6237\u7aefB\u83b7\u5f97\u4e86\u9501\uff1b\u6b64\u65f6A\u4ece\u963b\u585e\u4e2d\u6062\u590d\uff0c\u5b83\u4e0d\u77e5\u9053\u81ea\u5df1\u6301\u6709\u7684\u9501\u5df2\u7ecf\u8fc7\u671f\uff0c\u4f9d\u7136\u5411\u5171\u4eab\u8d44\u6e90\u53d1\u8d77\u5199\u6570\u636e\u8bf7\u6c42\uff0c\u800c\u6b64\u65f6\u9501\u5b9e\u9645\u662f\u88abB\u6301\u6709\uff0cA\u3001B\u7684\u5199\u8bf7\u6c42\u5c31\u6709\u53ef\u80fd\u51b2\u7a81\u3002<a href=\"https:\/\/martin.kleppmann.com\/2016\/02\/08\/how-to-do-distributed-locking.html\">Martin<\/a>\u7ed9\u7684\u65b9\u6cd5\u662f fencing token&#8211;\u4e00\u4e2a\u5355\u8c03\u9012\u589e\u7684\u6570\u5b57\uff0c\u5f53\u5ba2\u6237\u7aef\u83b7\u53d6\u9501\u6210\u529f\u540e\u968f\u540c\u9501\u4e00\u8d77\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002\u5ba2\u6237\u7aef\u5728\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u65f6\u5e26\u7740\u8fd9\u4e2atoken\uff0c\u8fd9\u6837\u5171\u4eab\u8d44\u6e90\u7684\u5b57\u7b26\u5c31\u80fd\u5bf9\u5b83\u8fdb\u884c\u68c0\u67e5\uff0c\u53ef\u4ee5\u62d2\u7edd\u6389\u5ef6\u8fdf\u5230\u6765\u7684\u8bbf\u95ee\u8bf7\u6c42\uff08\u907f\u514d\u51b2\u7a81\uff09\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>RedLock \u7b97\u6cd5<\/h2>\n<p>\u5047\u5b9a\u67095\u4e2a Redis master \u8282\u70b9\uff0cRedLock\u7b97\u6cd5\u6b65\u9aa4\u5982\u4e0b\uff1a<br \/>\n1.  \u83b7\u53d6\u5f53\u524d\u65f6\u95f4\uff08\u5355\u4f4d\u6beb\u79d2\uff09\uff1b<br \/>\n2.  \u8f6e\u6d41\u7528\u76f8\u540c\u7684key\u548c\u968f\u673a\u503c\u5728N\u4e2a\u8282\u70b9\u4e0a\u8bf7\u6c42\u9501\uff0c\u5728\u8fd9\u4e00\u6b65\uff0c\u5ba2\u6237\u7aef\u5728\u6bcf\u4e2amaster\u4e0a\u8bf7\u6c42\u9501\u65f6\uff0c\u4f1a\u6709\u4e00\u4e2a\u6bd4\u603b\u7684\u9501\u91ca\u653e\u65f6\u95f4\u5c0f\u7684\u591a\u7684\u8d85\u65f6\u65f6\u95f4\u3002\u6bd4\u5982\u5982\u679c\u9501\u81ea\u52a8\u91ca\u653e\u65f6\u95f4\u662f10\u79d2\u949f\uff0c\u90a3\u6bcf\u4e2a\u8282\u70b9\u9501\u8bf7\u6c42\u7684\u8d85\u65f6\u65f6\u95f4\u53ef\u80fd\u662f5-50\u6beb\u79d2\u7684\u8303\u56f4\uff0c\u8fd9\u6837\u53ef\u4ee5\u9632\u6b62\u4e00\u4e2a\u5ba2\u6237\u7aef\u5728\u67d0\u4e2a\u5b95\u6389\u7684master\u8282\u70b9\u4e0a\u963b\u585e\u8fc7\u957f\u65f6\u95f4\uff0c<strong>\u5982\u679c\u4e00\u4e2amaster\u8282\u70b9\u4e0d\u53ef\u7528\u4e86\uff0c\u6211\u4eec\u5e94\u8be5\u5c3d\u5feb\u5c1d\u8bd5\u4e0b\u4e00\u4e2amaster\u8282\u70b9<\/strong>\u3002<br \/>\n3.  \u5ba2\u6237\u7aef\u8ba1\u7b97\u7b2c\u4e8c\u6b65\u4e2d\u83b7\u53d6\u9501\u6240\u82b1\u7684\u65f6\u95f4\uff0c\u53ea\u6709\u5f53\u5ba2\u6237\u7aef\u5728\u5927\u591a\u6570master\u8282\u70b9\u4e0a\u6210\u529f\u83b7\u53d6\u4e86\u9501\uff08\u8fd9\u91cc\u662f3\uff09\uff0c\u800c\u4e14\u603b\u5171\u6d88\u8017\u7684\u65f6\u95f4\u4e0d\u8d85\u8fc7\u9501\u91ca\u653e\u65f6\u95f4\uff0c\u8fd9\u4e2a\u9501\u5c31\u8ba4\u4e3a\u662f\u83b7\u53d6\u6210\u529f\u4e86\u3002<br \/>\n4.  \u5982\u679c\u9501\u83b7\u53d6\u6210\u529f\uff0c\u90a3\u73b0\u5728\u9501\u81ea\u52a8\u91ca\u653e\u7684\u65f6\u95f4\u5c31\u662f\u6700\u521d\u7684\u9501\u91ca\u653e\u65f6\u95f4\u51cf\u53bb\u5f53\u524d\u83b7\u53d6\u9501\u6240\u6d88\u8017\u7684\u65f6\u95f4\u3002<br \/>\n5.  \u5982\u679c\u9501\u83b7\u53d6\u5931\u8d25\u4e86\uff0c\u4e0d\u7ba1\u662f\u56e0\u4e3a\u83b7\u53d6\u6210\u529f\u7684\u9501\u4e0d\u8d85\u8fc7\u4e00\u534a\u8fd8\u662f\u56e0\u4e3a\u6d88\u8017\u65f6\u95f4\u8d85\u8fc7\u4e86\u9501\u91ca\u653e\u65f6\u95f4\uff0c\u5ba2\u6237\u7aef\u90fd\u4f1a\u5230\u6bcf\u4e2amaster\u8282\u70b9\u4e0a\u91ca\u653e\u9501\uff0c\u5373\u4fbf\u662f\u90a3\u4e9b\u8ba4\u4e3a\u6ca1\u6709\u83b7\u53d6\u6210\u529f\u7684\u9501\u3002<\/p>\n<h3>\u5931\u8d25\u7684\u91cd\u8bd5<\/h3>\n<p>\u5f53\u4e00\u4e2a\u5ba2\u6237\u7aef\u83b7\u53d6\u9501\u5931\u8d25\u65f6\uff0c\u8fd9\u4e2a\u5ba2\u6237\u7aef\u5e94\u8be5\u5728\u4e00\u4e2a\u968f\u673a\u5ef6\u65f6\u540e\u8fdb\u884c\u91cd\u8bd5\uff0c\u91c7\u7528\u968f\u673a\u5ef6\u65f6\u662f\u4e3a\u4e86\u907f\u514d\u4e0d\u540c\u5ba2\u6237\u7aef\u540c\u65f6\u91cd\u8bd5\u5bfc\u81f4\u8c01\u90fd\u65e0\u6cd5\u62ff\u5230\u9501\u7684\u60c5\u51b5\u51fa\u73b0\u3002<\/p>\n<p>\u5ba2\u6237\u7aef\u5728\u5927\u591a\u6570Redis\u8282\u70b9\u8bf7\u6c42\u9501\u7684\u65f6\u95f4\u8d8a\u77ed\uff0c\u51fa\u73b0\u591a\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u7ade\u4e89\u9501\u548c\u91cd\u8bd5\u7684\u65f6\u95f4\u7a97\u53e3\u5c31\u8d8a\u5c0f\u3001\u53ef\u80fd\u6027\u8d8a\u4f4e\u3002\uff08\u901a\u8fc7\u5e76\u53d1\u8bf7\u6c42\u591a\u4e2a\u8282\u70b9\u7684\u9501\u51cf\u5c0f\u83b7\u53d6\u9501\u7684\u65f6\u95f4\u7a97\u53e3\uff0c\u8fd9\u6837\u591a\u4e2a\u5ba2\u6237\u7aef\u83b7\u53d6\u9501\u7684\u65f6\u95f4\u7a97\u53e3\u51fa\u73b0\u4ea4\u53c9\u7684\u53ef\u80fd\u6027\u5c31\u5c0f\u4e86\uff09\u3002<\/p>\n<p>\u4e00\u65e6\u6ca1\u6709\u83b7\u53d6\u5230\u591a\u6570\u8282\u70b9\u7684\u9501\uff0c\u4e00\u5b9a\u8981\u5c3d\u5feb\u91ca\u653e\u83b7\u53d6\u6210\u529f\u7684\u9501\u3002<\/p>\n<h2>Martin \u5bf9 Redlock \u7684\u770b\u6cd5<\/h2>\n<p>Redlock \u662f\u5efa\u7acb\u5728\u7f51\u7edc\u5ef6\u8fdf\u6709\u8fb9\u754c\u3001\u64cd\u4f5c\u7684\u6267\u884c\u65f6\u95f4\u6709\u8fb9\u754c\u7684\u540c\u6b65\u7cfb\u7edf\u57fa\u7840\u7684\u5047\u8bbe\u4e0a\u7684\uff1b\u5f53\u8fd9\u4e9b\u6761\u4ef6\u4e0d\u6ee1\u8db3\u7684\u65f6\u5019\u5c31\u4f1a\u8fdd\u80cc\u9501\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h2>\u53c2\u8003\u9605\u8bfb<\/h2>\n<p><a href=\"https:\/\/martin.kleppmann.com\/2016\/02\/08\/how-to-do-distributed-locking.html\">how-to-do-distributed-locking<\/a><br \/>\n<a href=\"http:\/\/antirez.com\/news\/101\">Reids \u4f5c\u8005\u5bf9 Martin \u7684\u56de\u590d<\/a><br \/>\n<a href=\"https:\/\/news.ycombinator.com\/item?id=11059738\">Hacker News \u4e0a\u7684\u8ba8\u8bba<\/a><\/p>\n<hr\/>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: <strong>coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"258\" src=\"https:\/\/coderbee.net\/wp-content\/uploads\/2019\/01\/coderbee-note.jpg\" class=\"alignnone size-full wp-image-1707\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7528\u5355\u5b9e\u4f8b\u7684\u6b63\u786e\u5b9e\u73b0 \u547d\u4ee4\uff1aset resource_name my_random &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/concurrent\/20170226\/1480\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[94,266],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1480"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=1480"}],"version-history":[{"count":4,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1480\/revisions"}],"predecessor-version":[{"id":1484,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1480\/revisions\/1484"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=1480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=1480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=1480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}