{"id":320,"date":"2022-03-20T14:41:28","date_gmt":"2022-03-20T14:41:28","guid":{"rendered":"https:\/\/blog.liguanxin.cn\/?p=320"},"modified":"2022-03-20T16:36:36","modified_gmt":"2022-03-20T16:36:36","slug":"%e5%88%86%e5%b8%83%e5%bc%8f%e7%b3%bb%e7%bb%9fraft%e7%ae%97%e6%b3%95%e7%ae%80%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/blog.liguanxin.cn\/index.php\/2022\/03\/20\/%e5%88%86%e5%b8%83%e5%bc%8f%e7%b3%bb%e7%bb%9fraft%e7%ae%97%e6%b3%95%e7%ae%80%e4%bb%8b\/","title":{"rendered":"\u5206\u5e03\u5f0f\u7cfb\u7edfRaft\u7b97\u6cd5\u7b80\u4ecb"},"content":{"rendered":"<h1>Raft\u7b97\u6cd5\u7b80\u4ecb<\/h1>\n<hr \/>\n<p>Raft(Reliable, Replicated, Redundant, And Fault-Tolerant)\uff08\u53ef\u9760\u3001\u53ef\u590d\u5236\u3001\u53ef\u5197\u4f59\u3001\u53ef\u5bb9\u9519\uff09<br \/>\nRaft\u662f\u4e00\u79cd\u4e00\u81f4\u6027\u7b97\u6cd5\uff0c\u5373\u4fdd\u8bc1\u4e00\u4e2a\u96c6\u7fa4\u7684\u591a\u53f0\u673a\u5668\u534f\u540c\u5de5\u4f5c\uff0c\u5728\u9047\u5230\u8bf7\u6c42\u65f6\uff0c\u6570\u636e\u80fd\u591f\u4fdd\u6301\u4e00\u81f4\u3002\u5373\u4f7f\u9047\u5230\u673a\u5668\u5b95\u673a\uff0c\u6574\u4e2a\u7cfb\u7edf\u4ecd\u7136\u80fd\u591f\u5bf9\u5916\u4fdd\u6301\u670d\u52a1\u7684\u53ef\u7528\u6027\u3002<\/p>\n<p><a href=\"http:\/\/thesecretlivesofdata.com\/raft\/\">\u6f02\u4eae\u7684\u52a8\u753b\u6f14\u793a<\/a><\/p>\n<p><a href=\"https:\/\/www.jianshu.com\/p\/6d9017289cd5\">\u7b80\u4e66\u7248\u7b97\u6cd5\u4ecb\u7ecd\uff08\u8be6\u7ec6\u7248\uff09<\/a><\/p>\n<p>\u4ee5\u4e0b\u5185\u5bb9\u6284\u81ea\u7ef4\u57fa\u767e\u79d1<\/p>\n<h2>Raft\u89d2\u8272<\/h2>\n<ul>\n<li>\n<p>Leader\uff08\u9886\u5bfc\u8005\uff09 \uff1a\u8d1f\u8d23\u65e5\u5fd7\u7684\u540c\u6b65\u7ba1\u7406\uff0c\u5904\u7406\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff0c\u4e0eFollower\u4fdd\u6301heartBeat\u7684\u8054\u7cfb\uff1b<\/p>\n<\/li>\n<li>\n<p>Follower\uff08\u8ffd\u968f\u8005\uff09 \uff1a\u54cd\u5e94 Leader \u7684\u65e5\u5fd7\u540c\u6b65\u8bf7\u6c42\uff0c\u54cd\u5e94Candidate\u7684\u9080\u7968\u8bf7\u6c42\uff0c\u4ee5\u53ca\u628a\u5ba2\u6237\u7aef\u8bf7\u6c42\u5230Follower\u7684\u4e8b\u52a1\u8f6c\u53d1\uff08\u91cd\u5b9a\u5411\uff09\u7ed9Leader\uff1b<\/p>\n<\/li>\n<li>\n<p>Candidate\uff08\u5019\u9009\u8005\uff09 \uff1a\u8d1f\u8d23\u9009\u4e3e\u6295\u7968\uff0c\u96c6\u7fa4\u521a\u542f\u52a8\u6216\u8005Leader\u5b95\u673a\u65f6\uff0c\u72b6\u6001\u4e3aFollower\u7684\u8282\u70b9\u5c06\u8f6c\u4e3aCandidate\u5e76\u53d1\u8d77\u9009\u4e3e\uff0c\u9009\u4e3e\u80dc\u51fa\uff08\u83b7\u5f97\u8d85\u8fc7\u534a\u6570\u8282\u70b9\u7684\u6295\u7968\uff09\u540e\uff0c\u4eceCandidate\u8f6c\u4e3aLeader\u72b6\u6001\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u9886\u8896\u9009\u4e3e<\/h2>\n<p>\u5728\u8d77\u59cb\u7b97\u6cd5\u6216\u9886\u8896\u6b7b\u673a\u3001\u65ad\u7ebf\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u9009\u4e3e\u51fa\u65b0\u7684\u9886\u8896\u3002<\/p>\n<p>\u6b64\u65f6\u96c6\u7fa4\u8fdb\u5165\u65b0\u7684\u4efb\u671f\uff08\u82f1\u8bed\uff1aterm\uff09\u5e76\u5f00\u59cb\u9009\u4e3e\uff0c\u5982\u679c\u9009\u4e3e\u6210\u529f\u5219\u65b0\u7684\u9886\u8896\u5f00\u59cb\u6267\u884c\u5de5\u4f5c\uff0c\u53cd\u4e4b\u5219\u89c6\u6b64\u4efb\u671f\u7ec8\u6b62\uff0c\u5f00\u59cb\u65b0\u7684\u4efb\u671f\u5e76\u5f00\u59cb\u4e0b\u4e00\u573a\u9009\u4e3e\u3002<\/p>\n<p>\u9009\u4e3e\u662f\u7531\u5019\u9009\u4eba\u53d1\u52a8\u7684\u3002\u5f53\u9886\u8896\u7684\u5fc3\u8df3\u8d85\u65f6\u7684\u65f6\u5019\uff0c\u8ffd\u968f\u8005\u5c31\u4f1a\u628a\u81ea\u5df1\u7684\u4efb\u671f\u7f16\u53f7\uff08\u82f1\u8bed\uff1aterm counter\uff09\u52a0\u4e00\u3001\u5ba3\u544a\u7ade\u9009\u3001\u6295\u81ea\u5df1\u4e00\u7968\u3001\u5e76\u5411\u5176\u4ed6\u670d\u52a1\u5668\u62c9\u7968\u3002\u6bcf\u4e2a\u670d\u52a1\u5668\u5728\u6bcf\u4e2a\u4efb\u671f\u53ea\u4f1a\u6295\u4e00\u7968\uff0c\u56fa\u5b9a\u6295\u7ed9\u6700\u65e9\u62c9\u7968\u7684\u670d\u52a1\u5668\u3002<\/p>\n<p>\u5982\u679c\u5019\u9009\u4eba\u6536\u5230\u5176\u4ed6\u5019\u9009\u4eba\u7684\u62c9\u7968\u3001\u800c\u4e14\u62c9\u7968\u7684\u4efb\u671f\u7f16\u53f7\u4e0d\u5c0f\u4e8e\u81ea\u5df1\u7684\u4efb\u671f\u7f16\u53f7\uff0c\u5c31\u4f1a\u81ea\u8ba4\u843d\u9009\uff0c\u6210\u4e3a\u8ffd\u968f\u8005\uff0c\u5e76\u8ba4\u5b9a\u6765\u62c9\u7968\u7684\u5019\u9009\u4eba\u4e3a\u9886\u8896\u3002\u5982\u679c\u6709\u5019\u9009\u4eba\u6536\u5230\u8fc7\u534a\u7684\u9009\u7968\u5c31\u5f53\u9009\u4e3a\u65b0\u7684\u9886\u8896\u3002\u5982\u679c\u8d85\u65f6\u4ecd\u6ca1\u6709\u9009\u51fa\u65b0\u9886\u8896\uff0c\u6b64\u4efb\u671f\u81ea\u52a8\u7ec8\u6b62\uff0c\u5f00\u59cb\u65b0\u7684\u4efb\u671f\u5e76\u5f00\u59cb\u4e0b\u4e00\u573a\u9009\u4e3e\u3002<\/p>\n<p>Raft\u6bcf\u4e2a\u670d\u52a1\u5668\u7684\u8d85\u65f6\u671f\u9650\u662f\u968f\u673a\u7684\uff0c\u8fd9\u964d\u4f4e\u4f3a\u670d\u52a1\u540c\u65f6\u7ade\u9009\u7684\u51e0\u7387\uff0c\u4e5f\u964d\u4f4e\u56e0\u4e24\u4e2a\u7ade\u9009\u4eba\u5f97\u7968\u90fd\u4e0d\u8fc7\u534a\u800c\u9009\u4e3e\u5931\u8d25\u7684\u51e0\u7387\u3002<\/p>\n<h2>\u8bb0\u5f55\u590d\u5199<\/h2>\n<p>\u8bb0\u5f55\u590d\u5199\u7684\u8d23\u4efb\u5728\u9886\u8896\u8eab\u4e0a\u3002<\/p>\n<p>\u6574\u4e2a\u96c6\u7fa4\u6709\u4e2a\u590d\u5199\u7684\u72b6\u6001\u673a\uff08\u82f1\u8bed\uff1astate machine\uff09\uff0c\u53ef\u6267\u884c\u5916\u6765\u7684\u6307\u4ee4\u3002\u9886\u8896\u63a5\u6536\u6307\u4ee4\uff0c\u5c06\u4e4b\u5199\u5165\u81ea\u5df1\u8bb0\u5f55\u4e2d\u7684\u65b0\u6307\u4ee4\u90e8\u5206\uff0c\u7136\u540e\u628a\u6307\u4ee4\u8f6c\u53d1\u7ed9\u8ffd\u968f\u8005\u3002\u5982\u679c\u6709\u8ffd\u968f\u8005\u6ca1\u53cd\u5e94\uff0c\u9886\u8896\u4f1a\u4e0d\u65ad\u91cd\u53d1\u6307\u4ee4\u3001\u76f4\u5230\u6bcf\u4e2a\u8ffd\u968f\u8005\u90fd\u6210\u529f\u5c06\u65b0\u6307\u4ee4\u5199\u5165\u8bb0\u5f55\u4e3a\u6b62\u3002<\/p>\n<p>\u5f53\u9886\u8896\u6536\u5230\u8fc7\u534a\u8ffd\u968f\u8005\u786e\u8ba4\u5199\u5165\u7684\u6d88\u606f\uff0c\u5c31\u4f1a\u628a\u6307\u4ee4\u89c6\u4e3a\u5df2\u5b58\u50a8\uff08\u82f1\u8bed\uff1acommitted\uff09\u3002\u5f53\u8ffd\u968f\u8005\u53d1\u73b0\u6307\u4ee4\u72b6\u6001\u53d8\u6210\u5df2\u5b58\u50a8\uff0c\u5c31\u4f1a\u5728\u5176\u72b6\u6001\u673a\u4e0a\u6267\u884c\u8be5\u6307\u4ee4\u3002<\/p>\n<p>\u5f53\u9886\u8896\u6b7b\u673a\u65f6\uff0c\u9886\u8896\u7684\u67d0\u4e9b\u65b0\u6307\u4ee4\u53ef\u80fd\u8fd8\u6ca1\u590d\u5199\u5230\u96c6\u7fa4\u6574\u4f53\uff0c\u9020\u6210\u96c6\u7fa4\u7684\u8bb0\u5f55\u5904\u4e8e\u4e0d\u4e00\u81f4\u7684\u72b6\u6001\u3002\u65b0\u9886\u8896\u4f1a\u62c5\u8d77\u91cd\u8fd4\u4e00\u81f4\u7684\u8d23\u4efb\uff0c\u8ba9\u6bcf\u4e2a\u8ffd\u968f\u8005\u7684\u8bb0\u5f55\u90fd\u548c\u5b83\u7684\u4e00\u81f4\uff0c\u505a\u6cd5\u662f\uff1a\u548c\u6bcf\u4e2a\u8ffd\u968f\u8005\u6bd4\u5bf9\u8bb0\u5f55\uff0c\u627e\u51fa\u4e24\u8005\u4e00\u81f4\u7684\u6700\u540e\u4e00\u7b14\u6307\u4ee4\uff0c\u5220\u9664\u8ffd\u968f\u8005\u4e4b\u540e\u7684\u6307\u4ee4\uff0c\u628a\u81ea\u5df1\u4e4b\u540e\u7684\u6307\u4ee4\u62f7\u8d1d\u7ed9\u8ffd\u968f\u8005\u3002\u8fd9\u4e2a\u673a\u5236\u5b8c\u6210\u65f6\uff0c\u6bcf\u4e2a\u670d\u52a1\u5668\u7684\u8bb0\u5f55\u5c31\u4f1a\u4e00\u81f4\u3002<\/p>\n<h2>\u5b89\u5168\u6027<\/h2>\n<p>Raft\u4fdd\u8bc1\u4ee5\u4e0b\u7684\u5b89\u5168\u6027\uff1a<\/p>\n<ul>\n<li>\u9009\u4e3e\u5b89\u5168\u6027\uff1a\u6bcf\u4e2a\u4efb\u671f\u6700\u591a\u53ea\u80fd\u9009\u51fa\u4e00\u4e2a\u9886\u8896\u3002<\/li>\n<li>\u9886\u8896\u9644\u52a0\u6027\uff1a\u9886\u8896\u53ea\u4f1a\u628a\u65b0\u6307\u4ee4\u9644\u52a0\uff08\u82f1\u8bed\uff1aappend\uff09\u5728\u8bb0\u5f55\u5c3e\u7aef\uff0c\u4e0d\u4f1a\u6539\u5199\u6216\u5220\u9664\u5df2\u6709\u6307\u4ee4\u3002<\/li>\n<li>\u8bb0\u5f55\u7b26\u5408\u6027\uff1a\u5982\u679c\u67d0\u4e2a\u6307\u4ee4\u5728\u4e24\u4e2a\u8bb0\u5f55\u4e2d\u7684\u4efb\u671f\u548c\u6307\u4ee4\u5e8f\u53f7\u4e00\u6837\uff0c\u5219\u4fdd\u8bc1\u5e8f\u53f7\u8f83\u5c0f\u7684\u6307\u4ee4\u4e5f\u5b8c\u5168\u4e00\u6837\u3002<\/li>\n<li>\u9886\u8896\u5b8c\u6574\u6027\uff1a\u5982\u679c\u67d0\u4e2a\u6307\u4ee4\u5728\u67d0\u4e2a\u4efb\u671f\u4e2d\u5b58\u50a8\u6210\u529f\uff0c\u5219\u4fdd\u8bc1\u5b58\u5728\u4e8e\u9886\u8896\u8be5\u4efb\u671f\u4e4b\u540e\u7684\u8bb0\u5f55\u4e2d\u3002<\/li>\n<li>\u72b6\u6001\u673a\u5b89\u5168\u6027\uff1a\u5982\u679c\u67d0\u670d\u52a1\u5668\u5728\u5176\u72b6\u6001\u673a\u4e0a\u6267\u884c\u4e86\u67d0\u4e2a\u6307\u4ee4\uff0c\u5176\u4ed6\u670d\u52a1\u5668\u4fdd\u8bc1\u4e0d\u4f1a\u5728\u540c\u4e2a\u72b6\u6001\u4e0a\u6267\u884c\u4e0d\u540c\u7684\u6307\u4ee4\u3002<br 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&lt;&lt; \u8d85\u65f6\u671f\u9650 &lt;&lt; \u5e73\u5747\u6545\u969c\u95f4\u9694<\/p>\n<\/blockquote>\n<p>\u5c31\u80fd\u8fbe\u5230\u7a33\u5b9a\u6027\u3002\u8fd9\u4e09\u4e2a\u65f6\u95f4\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u5e7f\u64ad\u65f6\u95f4 \u662f\u5355\u4e00\u670d\u52a1\u5668\u53d1\u9001\u6d88\u606f\u7ed9\u96c6\u7fa4\u4e2d\u6bcf\u53f0\u670d\u52a1\u5668\u5e76\u5f97\u5230\u56de\u5e94\u7684\u5e73\u5747\u65f6\u95f4\uff0c\u9700\u8981\u6d4b\u91cf\u5f97\u5230\u3002<\/li>\n<li>\u8d85\u65f6\u671f\u9650 \u662f\u53d1\u52a8\u9009\u4e3e\u7684\u8d85\u65f6\u671f\u9650\uff0c\u7531\u90e8\u7f72Raft\u96c6\u7fa4\u7684\u4eba\u9009\u5b9a\u3002<\/li>\n<li>\u5e73\u5747\u6545\u969c\u95f4\u9694 \u662f\u670d\u52a1\u5668\u53d1\u751f\u6545\u969c\u4e4b\u95f4\u7684\u5e73\u5747\u65f6\u95f4\uff0c\u53ef\u4ee5\u6d4b\u91cf\u6216\u4f30\u8ba1\u5f97\u5230\u3002<br \/>\n\u5e7f\u64ad\u65f6\u95f4\u5178\u578b\u662f 0.5ms \u5230 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