{"id":1322,"date":"2018-07-18T10:07:43","date_gmt":"2018-07-18T02:07:43","guid":{"rendered":"https:\/\/www.xiaobo.li\/?p=1322"},"modified":"2018-07-28T22:57:14","modified_gmt":"2018-07-28T14:57:14","slug":"%e5%88%86%e5%b8%83%e5%bc%8f%e4%ba%8b%e5%8a%a1%e4%b8%8e%e4%b8%80%e8%87%b4%e6%80%a7%e7%ae%97%e6%b3%95-paxos-raft-zab","status":"publish","type":"post","link":"https:\/\/www.xiaobo.li\/notes\/archives\/1322","title":{"rendered":"\u5206\u5e03\u5f0f\u4e8b\u52a1\u4e0e\u4e00\u81f4\u6027\u7b97\u6cd5 paxos &#038; raft &#038; zab"},"content":{"rendered":"<article>\n<div>..<\/div>\n<div id=\"article_content\" class=\"article_content clearfix csdn-tracking-statistics\" data-pid=\"blog\" data-mod=\"popu_307\" data-dsm=\"post\">\n<div class=\"htmledit_views\">\n<h3 class=\" md-focus\"><span class=\"md-expand\">1.CAP\u539f\u7406<\/span><\/h3>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u8981\u60f3\u6570\u636e\u9ad8\u53ef\u7528\uff0c\u5c31\u5f97\u5199\u591a\u4efd\u6570\u636e<\/span><\/li>\n<li><span class=\"\">\u5199\u591a\u5206\u6570\u636e\u5c31\u4f1a\u5bfc\u81f4\u6570\u636e\u4e00\u81f4\u6027\u95ee\u9898<\/span><\/li>\n<li><span class=\"\">\u6570\u636e\u4e00\u81f4\u6027\u95ee\u9898\u4f1a\u5f15\u8d77\u6027\u80fd\u95ee\u9898<\/span><\/li>\n<\/ul>\n<h3 class=\"\">2.\u4e00\u81f4\u6027\u6a21\u578b<\/h3>\n<ol class=\"ol-list\">\n<li><span class=\"\">\u5f31\u4e00\u81f4\u6027<\/span><\/li>\n<li><span class=\"\">\u6700\u7ec8\u4e00\u81f4\u6027\uff08\u4e00\u6bb5\u65f6\u95f4\u8fbe\u5230\u4e00\u81f4\u6027\uff09<\/span><\/li>\n<li><span class=\"\">\u5f3a\u4e00\u81f4<\/span><\/li>\n<\/ol>\n<ul class=\"ul-list\">\n<li><span class=\"\">1\u30012 \u5f02\u6b65\u5197\u4f59\uff1b3\u662f\u540c\u6b65\u5197\u4f59<\/span><\/li>\n<\/ul>\n<h3 class=\"\">3. \u6269\u5c55\u670d\u52a1\u7684\u65b9\u6848<\/h3>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u6570\u636e\u5206\u533a\uff1a uid % 16<\/span><\/li>\n<li><span class=\"\">\u6570\u636e\u955c\u50cf\uff1a\u8ba9\u591a\u6709\u7684\u670d\u52a1\u5668\u90fd\u6709\u76f8\u540c\u7684\u6570\u636e\uff0c\u63d0\u4f9b\u76f8\u5f53\u7684\u670d\u52a1\uff08\u5197\u4f59\u5b58\u50a8\uff0c\u4e00\u822c3\u4efd\u4e3a\u597d\uff09<\/span><\/li>\n<\/ul>\n<h3 class=\"\">4.\u4e24\u79cd\u65b9\u6848\u7684\u4e8b\u52a1\u95ee\u9898<\/h3>\n<ol class=\"ol-list\">\n<li><span class=\"\">A\u5411B\u6c47\u94b1\uff0c\u4e24\u4e2a\u7528\u6237\u4e0d\u5728\u4e00\u4e2a\u670d\u52a1\u5668\u4e0a<\/span><\/li>\n<li><span class=\"\">\u955c\u50cf\uff1a\u5728\u4e0d\u540c\u7684\u670d\u52a1\u5668\u4e0a\u5bf9\u540c\u4e00\u6570\u636e\u7684\u5199\u64cd\u4f5c\u5982\u4f55\u4fdd\u8bc1\u4e00\u81f4\u6027\u3002<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1323 size-full\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/11-3.png\" alt=\"\" width=\"450\" height=\"214\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/11-3.png 450w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/11-3-300x143.png 300w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/span><\/li>\n<\/ol>\n<h2 class=\"\">5. \u89e3\u51b3\u4e00\u81f4\u6027\u4e8b\u52a1\u95ee\u9898\u7684\u6280\u672f<\/h2>\n<h3 class=\"\">1. Master -Slave<\/h3>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u8bfb\u5199\u8bf7\u6c42\u7531Master\u8d1f\u8d23<\/span><\/li>\n<li><span class=\"\">\u5199\u8bf7\u6c42\u5199\u5230Master\u540e\uff0c\u7531Master\u540c\u6b65\u5230Slave\u4e0a<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u7531Master push or Slave pull<\/span><\/li>\n<li><span class=\"\">\u901a\u5e38\u662f\u7531Slave \u5468\u671f\u6027\u6765pull\uff0c\u6240\u4ee5\u662f\u6700\u7ec8\u4e00\u81f4\u6027<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span class=\"\">\u95ee\u9898\uff1a \u82e5\u5728 pull \u5468\u671f\u5185\uff08\u4e0d\u662f\u671f\u95f4\uff1f\uff09\uff0cmaster\u6302\u6389\uff0c\u90a3\u4e48\u4f1a\u5bfc\u81f4\u8fd9\u4e2a\u65f6\u95f4\u7247\u5185\u7684\u6570\u636e\u4e22\u5931<\/span><\/p>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u82e5\u4e0d\u60f3\u8ba9\u6570\u636e\u4e22\u6389\uff0cSlave \u53ea\u80fd\u6210\u4e3a ReadOnly\u65b9\u5f0f\u7b49Master\u6062\u590d<\/span><\/li>\n<li><span class=\"\">\u82e5\u5bb9\u5fcd\u6570\u636e\u4e22\u5931\uff0c\u53ef\u4ee5\u8ba9 Slave\u4ee3\u66ffMaster\u5de5\u4f5c<\/span><\/li>\n<\/ul>\n<p><span class=\"\">\u5982\u4f55\u4fdd\u8bc1\u5f3a\u4e00\u81f4\u6027\uff1f<\/span><\/p>\n<ul class=\"ul-list\">\n<li><span class=\"\">Master \u5199\u64cd\u4f5c\uff0c\u5199\u5b8c\u6210\u529f\u540e\uff0c\u518d\u5199 Slave\uff0c\u4e24\u8005\u6210\u529f\u540e\u8fd4\u56de\u6210\u529f\u3002\u82e5 Slave\u5931\u8d25\uff0c\u4e24\u79cd\u65b9\u6cd5<\/span>\n<ol class=\"ol-list\">\n<li><span class=\"\">\u6807\u8bb0 Slave \u4e0d\u53ef\u7528\u62a5\u9519\uff0c\u5e76\u7ee7\u7eed\u670d\u52a1\uff08\u7b49\u6062\u590d\u540e\uff0c\u518d\u540c\u6b65Master\u7684\u6570\u636e\uff0c\u591a\u4e2aSlave\u5c11\u4e86\u4e00\u4e2a\u800c\u5df2\uff09<\/span><\/li>\n<li><span class=\"\">\u56de\u6eda\u81ea\u5df1\u5e76\u8fd4\u56de\u5931\u8d25<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<h3 class=\"\">2. Master-Master<\/h3>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u6570\u636e\u540c\u6b65\u4e00\u822c\u662f\u901a\u8fc7 Master \u95f4\u7684\u5f02\u6b65\u5b8c\u6210\uff0c\u6240\u4ee5\u662f\u6700\u7ec8\u4e00\u81f4<\/span><\/li>\n<li><span class=\"\">\u597d\u5904\uff1a \u4e00\u53f0Master\u6302\u6389\uff0c\u53e6\u5916\u4e00\u53f0\u7167\u6837\u53ef\u4ee5\u63d0\u4f9b\u8bfb\u5199\u670d\u52a1\u3002\u5f53\u6570\u636e\u6ca1\u6709\u88ab\u8d4b\u503c\u5230\u522b\u7684Master\u4e0a\u65f6\uff0c\u6570\u636e\u4f1a\u4e22\u5931\u3002<\/span><\/li>\n<li><span class=\"\">\u5bf9\u540c\u4e00\u6570\u636e\u7684\u5904\u7406\u95ee\u9898\uff1aDynamo\u7684Vector Clock\u7684\u8bbe\u8ba1\uff08\u8bb0\u5f55\u6570\u636e\u7684\u7248\u672c\u53f7\u548c\u4fee\u6539\u8005\uff09\uff0c\u5f53\u6570\u636e\u53d1\u751f\u51b2\u7a81\u65f6\uff0c\u8981\u5f00\u53d1\u8005\u81ea\u5df1\u6765\u5904\u7406<\/span><span class=\"\">\u200b<\/span><\/li>\n<\/ul>\n<h3 class=\"\">3.\u4e24\u9636\u6bb5\u63d0\u4ea4 Two Phase Commit _ 2PC<\/h3>\n<ol class=\"ol-list\">\n<li><span class=\"\">\u7b2c\u4e00\u9636\u6bb5\uff1a\u9488\u5bf9\u51c6\u5907\u5de5\u4f5c<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u534f\u8c03\u8005\u95ee\u6240\u6709\u8282\u70b9\u662f\u5426\u53ef\u4ee5\u6267\u884c\u63d0\u4ea4<\/span><\/li>\n<li><span class=\"\">\u53c2\u4e0e\u8005\u5f00\u59cb\u4e8b\u52a1\uff0c\u6267\u884c\u51c6\u5907\u5de5\u4f5c\uff1a\u9501\u5b9a\u8d44\u6e90\uff08\u83b7\u53d6\u9501\u64cd\u4f5c\uff09<\/span><\/li>\n<li><span class=\"\">\u53c2\u4e0e\u8005\u54cd\u5e94\u534f\u8c03\u8005\uff0c\u5982\u679c\u4e8b\u52a1\u7684\u51c6\u5907\u5de5\u4f5c\u6210\u529f\uff0c\u5219\u56de\u5e94\"\u53ef\u4ee5\u63d0\u4ea4\"\uff0c\u5426\u5219\uff0c\u62d2\u7edd\u63d0\u4ea4<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span class=\"\">\u7b2c\u4e8c\u9636\u6bb5\uff1a<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u82e5\u90fd\u54cd\u5e94\u53ef\u4ee5\u63d0\u4ea4\uff0c\u5219\u534f\u8c03\u8005\u9879\u591a\u6709\u53c2\u4e0e\u8005\u53d1\u9001\u6b63\u5f0f\u63d0\u4ea4\u7684\u547d\u4ee4\uff08\u66f4\u65b0\u503c\uff09\uff0c\u53c2\u4e0e\u8005\u5b8c\u6210\u6b63\u5f0f\u63d0\u4ea4\uff0c\u91ca\u653e\u8d44\u6e90\uff0c\u56de\u5e94\u5b8c\u6210\u3002\u534f\u8c03\u8005\u6536\u5230\u6240\u6709\u8282\u70b9\u7684\u5b8c\u6210\u54cd\u5e94\u540e\u7ed3\u675f\u8fd9\u4e2a\u5168\u5c40\u4e8b\u52a1.\u3002\u82e5\u53c2\u4e0e\u8005\u56de\u5e94\u62d2\u7edd\u63d0\u4ea4\uff0c\u5219\u534f\u8c03\u8005\u5411\u6240\u6709\u7684\u53c2\u4e0e\u8005\u53d1\u9001\u56de\u6eda\u64cd\u4f5c\uff0c\u5e76\u91ca\u653e\u8d44\u6e90\uff0c\u5f53\u6536\u5230\u5168\u90e8\u8282\u70b9\u7684\u56de\u6eda\u56de\u5e94\u540e\uff0c\u53d6\u6d88\u5168\u5c40\u4e8b\u52a1<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span class=\"\">\u5b58\u5728\u7684\u95ee\u9898\uff1a\u82e5\u4e00\u4e2a\u6ca1\u63d0\u4ea4\uff0c\u5c31\u4f1a\u8fdb\u884c\u56de\u6eda<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u7b2c\u4e00\u9636\u6bb5\uff1a\u82e5\u6d88\u606f\u7684\u4f20\u9012\u672a\u63a5\u6536\u5230\uff0c\u5219\u9700\u8981\u534f\u8c03\u8005\u4f5c\u8d85\u65f6\u5904\u7406\uff0c\u8981\u4e48\u5f53\u505a\u5931\u8d25\uff0c\u8981\u4e48\u91cd\u8f7d<\/span><\/li>\n<li><span class=\"\">\u7b2c\u4e8c\u9636\u6bb5\uff1a\u82e5\u53c2\u4e0e\u8005\u7684\u56de\u5e94\u8d85\u65f6\uff0c\u8981\u4e48\u91cd\u8bd5\uff0c\u8981\u4e48\u628a\u90a3\u4e2a\u53c2\u4e0e\u8005\u5373\u4e3a\u95ee\u9898\u8282\u70b9\uff0c\u63d0\u51fa\u6574\u4e2a\u96c6\u7fa4<\/span><\/li>\n<li><span class=\"\">\u5728\u7b2c\u4e8c\u9636\u6bb5\u4e2d\uff0c\u53c2\u4e0e\u8005\u672a\u6536\u5230\u534f\u8c03\u8005\u7684\u6307\u793a\uff08\u4e5f\u8bb8\u534f\u8c03\u8005\u6302\u6389\uff09\uff0c\u5219\u6240\u6709\u53c2\u4e0e\u8005\u4f1a\u8fdb\u5165\u201c\u4e0d\u77e5\u6240\u63aa\u201d \u7684\u72b6\u6001\uff08\u4f46\u662f\u5df2\u7ecf\u9501\u5b9a\u4e86\u8d44\u6e90\uff09\uff0c\u6240\u4ee5\u5f15\u5165\u4e86\u4e09\u6bb5\u63d0\u4ea4<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3 class=\"\">4. \u4e09\u6bb5\u63d0\u4ea4\uff1a\u628a\u4e8c\u6bb5\u63d0\u4ea4\u7684\u7b2c\u4e00\u9636\u6bb5 break \u6210\u4e86\u4e24\u6bb5<\/h3>\n<ol class=\"ol-list\">\n<li><span class=\"\">\u8be2\u95ee<\/span><\/li>\n<li><span class=\"\">\u9501\u5b9a\u8d44\u6e90\uff08\u83b7\u53d6\u9501\uff09<\/span><\/li>\n<li><span class=\"\">\u63d0\u4ea4<\/span><\/li>\n<\/ol>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u6838\u5fc3\u7406\u5ff5\uff1a\u5728\u8be2\u95ee\u7684\u65f6\u5019\u5e76\u4e0d\u9501\u5b9a\u8d44\u6e90\uff0c\u9664\u975e\u6240\u6709\u4eba\u90fd\u540c\u610f\u4e86\uff0c\u624d\u5f00\u59cb\u9501\u5b9a<\/span><\/li>\n<li><span class=\"\">\u597d\u5904\uff1a\u5f53\u53d1\u751f\u4e86\u5931\u8d25\u6216\u8d85\u65f6\u65f6\uff0c\u4e09\u6bb5\u63d0\u4ea4\u53ef\u4ee5\u7ee7\u7eed\u628a\u72b6\u6001\u53d8\u4e3aCommit \u72b6\u6001\uff0c\u800c\u4e8c\u6bb5\u63d0\u4ea4\u5219\u4e0d\u77e5\u6240\u63aa\uff1f<\/span><\/li>\n<\/ul>\n<h3 class=\"\">5. Raxos \u7b97\u6cd5\uff08\u5c11\u6570\u670d\u4ece\u591a\u6570\uff09<\/h3>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u89e3\u51b3\u7684\u95ee\u9898\uff1a\u5728\u4e00\u4e2a\u53ef\u80fd\u53d1\u751f\u5f02\u5e38\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u5982\u4f55\u5c31\u67d0\u4e2a\u503c\u8fbe\u6210\u4e00\u81f4\uff0c\u8ba9\u6574\u4e2a\u96c6\u7fa4\u7684\u8282\u70b9\u5bf9\u67d0\u4e2a\u503c\u7684\u53d8\u66f4\u8fbe\u6210\u4e00\u81f4<\/span><\/li>\n<li><span class=\"\">\u4efb\u4f55\u4e00\u4e2a\u8282\u70b9\u90fd\u53ef\u4ee5\u63d0\u51fa\u8981\u4fee\u6539<strong>\u67d0\u4e2a<\/strong>\u6570\u636e\u7684\u63d0\u6848,\u662f\u5426\u901a\u8fc7\u8fd9\u4e2a\u63d0\u6848\u53d6\u51b3\u4e8e\u8fd9\u4e2a\u96c6\u7fa4\u4e2d\u662f\u5426\u6709\u8d85\u8fc7\u534a\u6570\u7684\u8282\u70b9\u540c\u610f\uff08\u6240\u4ee5\u8282\u70b9\u6570\u603b\u662f\u5355\u6570\uff09\u2014\u2014 \u7248\u672c\u6807\u8bb0\u3002\u867d\u7136\u4e00\u81f4\u6027\uff0c\u4f46\u662f\u53ea\u80fd\u5bf9\u4e00\u4e2a\u64cd\u4f5c\u8fdb\u884c\u64cd\u4f5c\u554a\uff1f\uff1f<\/span><\/li>\n<li><span class=\"\">\u5f53\u4e00\u4e2aServer\u63a5\u6536\u5230\u6bd4\u5f53\u524d\u7248\u672c\u53f7\u5c0f\u7684\u63d0\u6848\u65f6\uff0c\u5219\u62d2\u7edd\u3002\u5f53\u6536\u5230\u6bd4\u5f53\u524d\u5927\u7684\u7248\u672c\u53f7\u7684\u63d0\u6848\u65f6\uff0c\u5219\u9501\u5b9a\u8d44\u6e90\uff0c\u8fdb\u884c\u4fee\u6539\uff0c\u8fd4\u56deOK. \u4e5f\u5c31\u662f\u8bf4\u6536\u5230\u8d85\u8fc7\u4e00\u534a\u7684\u6700\u5927\u7248\u672c\u7684\u63d0\u6848\u624d\u7b97\u6210\u529f\u3002<\/span><\/li>\n<\/ul>\n<p><span class=\"\"><strong>\u6838\u5fc3\u601d\u60f3<\/strong>\uff1a<\/span><\/p>\n<ol class=\"ol-list\">\n<li><span class=\"\">\u5728\u62a2\u5360\u5f0f\u8bbf\u95ee\u6743\u7684\u57fa\u7840\u4e0a\u5f15\u5165\u591a\u4e2aacceptor\uff0c\u4e5f\u5c31\u662f\u8bf4\u5f53\u4e00\u4e2a\u7248\u672c\u53f7\u66f4\u5927\u7684\u63d0\u6848\u53ef\u4ee5\u5265\u593a\u7248\u672c\u53f7\u5df2\u7ecf\u83b7\u53d6\u7684\u9501\u3002<\/span><\/li>\n<li><span class=\"\">\u540e\u8005\u8ba4\u540c\u524d\u8005\u7684\u539f\u5219\uff1a<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u5728\u80af\u5b9a\u65e7epoch \u65e0\u6cd5\u751f\u6210\u786e\u5b9a\u6027\u53d6\u503c\u65f6\uff0c\u65b0\u7684 epoch \u4f1a\u63d0\u4ea4\u81ea\u5df1\u7684valu<\/span><\/li>\n<li><span class=\"\">\u4e00\u65e6 \u65e7epoch\u5f62\u6210\u786e\u5b9a\u6027\u53d6\u503c\uff0c\u65b0\u7684 epoch\u80af\u5b9a\u53ef\u4ee5\u83b7\u53d6\u5230\u6b64\u53d6\u503c\uff0c\u5e76\u4e14\u4f1a\u8ba4\u540c\u6b64\u53d6\u503c\uff0c\u4e0d\u4f1a\u88ab\u7834\u574f\u3002<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><span class=\"\"><strong>\u6b65\u9aa4<\/strong><\/span><\/p>\n<ol class=\"ol-list\">\n<li><span class=\"\">P1 \u8bf7\u6c42Acceptor\u7684 #1,Acceptor \u8fd9\u65f6\u5e76\u6ca1\u6709\u5176\u4ed6\u7ebf\u7a0b\u83b7\u53d6\u5230\u9501\uff0c\u6240\u4ee5\u628a\u9501\u4ea4\u7ed9 P1\uff0c\u5e76\u8fd4\u56de\u8fd9\u65f6 #1 \u7684\u503c\u4e3anull<br \/>\n<a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/22-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1324 \" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/22-1-1024x565.png\" alt=\"\" width=\"604\" height=\"333\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/22-1-1024x565.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/22-1-300x166.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/22-1-768x424.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/22-1.png 1344w\" sizes=\"auto, (max-width: 604px) 100vw, 604px\" \/><\/a><\/span><\/li>\n<li><span class=\"\">\u7136\u540e P1 \u5411 \u7b2c\u4e00\u4e2a Acceptor \u63d0\u4ea4 #1 \u7684\u503c\uff0cAcceptor \u63a5\u53d7\u5e76\u8fd4\u56de OK<\/span><br \/>\n<a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/33.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1325 \" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/33-1024x552.png\" alt=\"\" width=\"601\" height=\"324\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/33-1024x552.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/33-300x162.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/33-768x414.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/33.png 1379w\" sizes=\"auto, (max-width: 601px) 100vw, 601px\" \/><\/a><\/li>\n<li><span class=\"\">\u8fd9\u4e2a\u65f6\u5019\uff0cP2\u5411Acceptor\u8bf7\u6c42#1\u4e0a\u7684\u9501\uff0c\u56e0\u4e3a\u7248\u672c\u53f7\u66f4\u5927\uff0c\u6240\u4ee5\u76f4\u63a5\u62a2\u5360\u4e86 P1 \u7684\u9501\u3002\u8fd9\u65f6 Acceptor \u8fd4\u56de\u4e86 OK\u5e76\u4e14\u8fd4\u56de\u4e86 #1 \u7684\u503c<\/span><br \/>\n<a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/44.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1326 \" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/44-1024x536.png\" alt=\"\" width=\"599\" height=\"313\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/44-1024x536.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/44-300x157.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/44-768x402.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/44.png 1365w\" sizes=\"auto, (max-width: 599px) 100vw, 599px\" \/><\/a><\/li>\n<li><span class=\"\">\u8fd9\u65f6 P1 P\u5411 \u540e\u9762\u4e24\u4e2a Acceptor \u63d0\u4ea4 #1 \u7684\u503c\uff0c\u4f46\u662f\u7531\u4e8e\u4e2d\u95f4\u7684\u90a3\u4e2aAcceptor \u7248\u672c\u53f7\u5df2\u7ecf\u66f4\u6539\u4e3a 2 \u4e86\uff0c\u6240\u4ee5\u62d2\u7eddP1\u3002\u7b2c\u4e09\u4e2a Acceptor \u63a5\u53d7\u4e86\uff0c\u5e76\u4e14\u8fd4\u56de\u4e86 OK<\/span><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/55.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1327 \" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/55-1024x563.png\" alt=\"\" width=\"607\" height=\"334\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/55-1024x563.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/55-300x165.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/55-768x422.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/55.png 1336w\" sizes=\"auto, (max-width: 607px) 100vw, 607px\" \/><\/a><\/li>\n<li><span class=\"\">\u7531\u4e8e\u540e\u8005\u8ba4\u540c\u524d\u8005\u7684\u539f\u5219\uff0c\u8fd9\u65f6 P1 \u5df2\u7ecf\u5f62\u6210\u786e\u5b9a\u6027\u53d6\u503c\u4e86 V1 \u4e86\uff0c\u8fd9\u65f6\u65b0\u7684 P2 \u4f1a\u8ba4\u540c\u6b64\u53d6\u503c\uff0c\u800c\u4e0d\u662f\u63d0\u4ea4\u81ea\u5df1\u7684\u53d6\u503c\u3002\u6240\u4ee5\uff0cP2\u4f1a\u9009\u62e9\u6700\u65b0\u7684\u90a3\u4e2a\u53d6\u503c \u4e5f\u5c31\u662fV1 \u8fdb\u884c\u63d0\u4ea4\u3002\u8fd9\u65f6Acceptor \u8fd4\u56de OK<\/span><br \/>\n<a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/66.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1328 \" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/66-1024x538.png\" alt=\"\" width=\"610\" height=\"321\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/66-1024x538.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/66-300x158.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/66-768x403.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/66.png 1396w\" sizes=\"auto, (max-width: 610px) 100vw, 610px\" \/><\/a><\/li>\n<\/ol>\n<h3 class=\"\">6.ZAB \u534f\u8bae ( Zookeeper Atomic Broadcast) \u539f\u5b50\u5e7f\u64ad\u534f\u8bae\uff1a\u4fdd\u8bc1\u4e86\u53d1\u7ed9\u5404\u526f\u672c\u7684\u6d88\u606f\u987a\u5e8f\u76f8\u540c<\/h3>\n<p><span class=\"\"><strong>\u5b9a\u4e49<\/strong>\uff1a\u539f\u5b50\u5e7f\u64ad\u534f\u8bae ZAB \u662f\u4e00\u81f4\u6027\u534f\u8bae\uff0cZookeeper \u628a\u5176\u4f5c\u4e3a\u6570\u636e\u4e00\u81f4\u6027\u7684\u7b97\u6cd5\u3002ZAB \u662f\u5728 Paxos \u7b97\u6cd5\u57fa\u7840\u4e0a\u8fdb\u884c\u6269\u5c55\u800c\u6765\u7684\u3002Zookeeper \u4f7f\u7528\u5355\u4e00\u4e3b\u8fdb\u7a0b Leader\u7528\u4e8e\u5904\u7406\u5ba2\u6237\u7aef\u6240\u6709\u4e8b\u52a1\u8bf7\u6c42\uff0c\u91c7\u7528 ZAB \u534f\u8bae\u5c06\u670d\u52a1\u5668\u72b6\u6001\u4ee5\u4e8b\u52a1\u5f62\u5f0f\u5e7f\u64ad\u5230\u6240\u6709 Follower \u4e0a\uff0c\u7531\u4e8e\u4e8b\u52a1\u95f4\u53ef\u80fd\u5b58\u5728\u7740\u4f9d\u8d56\u5173\u7cfb\uff0cZAB\u534f\u8bae\u4fdd\u8bc1 Leader \u5e7f\u64ad\u7684\u53d8\u66f4\u5e8f\u5217\u88ab\u987a\u5e8f\u7684\u5904\u7406\uff0c\u4e00\u4e2a\u72b6\u6001\u88ab\u5904\u7406\u90a3\u4e48\u5b83\u6240\u4f9d\u8d56\u7684\u72b6\u6001\u4e5f\u5df2\u7ecf\u63d0\u524d\u88ab\u5904\u7406<\/span><\/p>\n<p><span class=\"\"><strong>\u6838\u5fc3\u601d\u60f3\uff1a<\/strong>\u4fdd\u8bc1\u4efb\u610f\u65f6\u523b\u53ea\u6709\u4e00\u4e2a\u8282\u70b9\u662fLeader\uff0c\u6240\u6709\u66f4\u65b0\u4e8b\u52a1\u7531Leader\u53d1\u8d77\u53bb\u66f4\u65b0\u6240\u6709\u526f\u672c Follower\uff0c\u66f4\u65b0\u65f6\u7528\u7684\u662f \u4e24\u6bb5\u63d0\u4ea4\u534f\u8bae\uff0c\u53ea\u8981\u591a\u6570\u8282\u70b9 prepare \u6210\u529f\uff0c\u5c31\u901a\u77e5\u4ed6\u4eeccommit\u3002\u5404\u4e2afollower \u8981\u6309\u5f53\u521d leader \u8ba9\u4ed6\u4eec prepare \u7684\u987a\u5e8f\u6765 apply \u4e8b\u52a1<\/span><\/p>\n<p><span class=\"\"><strong>\u534f\u8bae\u72b6\u6001<\/strong><\/span><\/p>\n<ol class=\"ol-list\">\n<li><span class=\"\">Looking:\u7cfb\u7edf\u521a\u542f\u52a8\u65f6 \u6216\u8005 Leader \u5d29\u6e83\u540e\u6b63\u5904\u4e8e\u9009\u4e3e\u72b6\u6001<\/span><\/li>\n<li><span class=\"\">Following\uff1aFollower \u8282\u70b9\u6240\u5904\u7684\u72b6\u6001\uff0cFollower\u4e0e Leader\u5904\u4e8e\u6570\u636e\u540c\u6b65\u72b6\u6001<\/span><\/li>\n<li><span class=\"\">Leading\uff1aLeader \u6240\u5904\u72b6\u6001\uff0c\u5f53\u524d\u96c6\u7fa4\u4e2d\u6709\u4e00\u4e2a Leader \u4e3a\u4e3b\u8fdb\u7a0b<\/span><\/li>\n<\/ol>\n<ul class=\"ul-list\">\n<li><span class=\"\">ZooKeeper\u542f\u52a8\u65f6\u6240\u6709\u8282\u70b9\u521d\u59cb\u72b6\u6001\u4e3aLooking\uff0c\u8fd9\u65f6\u96c6\u7fa4\u4f1a\u5c1d\u8bd5\u9009\u4e3e\u51fa\u4e00\u4e2aLeader\u8282\u70b9\uff0c\u9009\u4e3e\u51fa\u7684Leader\u8282\u70b9\u5207\u6362\u4e3aLeading\u72b6\u6001\uff1b\u5f53\u8282\u70b9\u53d1\u73b0\u96c6\u7fa4\u4e2d\u5df2\u7ecf\u9009\u4e3e\u51faLeader\u5219\u8be5\u8282\u70b9\u4f1a\u5207\u6362\u5230Following\u72b6\u6001\uff0c\u7136\u540e\u548cLeader\u8282\u70b9\u4fdd\u6301\u540c\u6b65\uff1b\u5f53Follower\u8282\u70b9\u4e0eLeader\u5931\u53bb\u8054\u7cfb\u65f6Follower\u8282\u70b9\u5219\u4f1a\u5207\u6362\u5230Looking\u72b6\u6001\uff0c\u5f00\u59cb\u65b0\u4e00\u8f6e\u9009\u4e3e\uff1b\u5728ZooKeeper\u7684\u6574\u4e2a\u751f\u547d\u5468\u671f\u4e2d\u6bcf\u4e2a\u8282\u70b9\u90fd\u4f1a\u5728Looking\u3001Following\u3001Leading\u72b6\u6001\u95f4\u4e0d\u65ad\u8f6c\u6362\u3002<\/span><\/li>\n<li><span class=\"\"><span class=\"md-image md-img-loaded\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1329 size-full\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/77.png\" alt=\"\" width=\"485\" height=\"308\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/77.png 485w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/77-300x191.png 300w\" sizes=\"auto, (max-width: 485px) 100vw, 485px\" \/><\/span><\/span><\/li>\n<li><span class=\"\">\u9009\u4e3e\u51faLeader\u8282\u70b9\u540e ZAB \u8fdb\u5165\u539f\u5b50\u5e7f\u64ad\u9636\u6bb5\uff0c\u8fd9\u65f6Leader\u4e3a\u548c\u81ea\u5df1\u540c\u6b65\u6bcf\u4e2a\u8282\u70b9 Follower \u521b\u5efa\u4e00\u4e2a\u64cd\u4f5c\u5e8f\u5217\uff0c\u4e00\u4e2a\u65f6\u671f\u4e00\u4e2a Follower \u53ea\u80fd\u548c\u4e00\u4e2aLeader\u4fdd\u6301\u540c\u6b65<\/span><\/li>\n<\/ul>\n<p><span class=\"\"><strong>\u9636\u6bb5<\/strong><\/span><\/p>\n<ol class=\"ol-list\">\n<li><span class=\"\">Election\uff1a \u5728 Looking\u72b6\u6001\u4e2d\u9009\u4e3e\u51fa Leader\u8282\u70b9\uff0cLeader\u7684LastZXID\u603b\u662f\u6700\u65b0\u7684\uff08\u53ea\u6709lastZXID\u7684\u8282\u70b9\u624d\u6709\u8d44\u683c\u6210\u4e3aLeade,\u8fd9\u79cd\u60c5\u51b5\u4e0b\u9009\u4e3e\u51fa\u6765\u7684Leader\u603b\u6709\u6700\u65b0\u7684\u4e8b\u52a1\u65e5\u5fd7\uff09\u3002\u5728\u9009\u4e3e\u7684\u8fc7\u7a0b\u4e2d\u4f1a\u5bf9\u6bcf\u4e2aFollower\u8282\u70b9\u7684ZXID\u8fdb\u884c\u5bf9\u6bd4\u53ea\u6709highestZXID\u7684Follower\u624d\u53ef\u80fd\u5f53\u9009Leader<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u6bcf\u4e2aFollower\u90fd\u5411\u5176\u4ed6\u8282\u70b9\u53d1\u9001\u9009\u81ea\u8eab\u4e3aLeader\u7684Vote\u6295\u7968\u8bf7\u6c42\uff0c\u7b49\u5f85\u56de\u590d\uff1b<\/span><\/li>\n<li><span class=\"\">Follower\u63a5\u53d7\u5230\u7684Vote\u5982\u679c\u6bd4\u81ea\u8eab\u7684\u5927\uff08ZXID\u66f4\u65b0\uff09\u65f6\u5219\u6295\u7968\uff0c\u5e76\u66f4\u65b0\u81ea\u8eab\u7684Vote\uff0c\u5426\u5219\u62d2\u7edd\u6295\u7968\uff1b<\/span><\/li>\n<li><span class=\"\">\u6bcf\u4e2aFollower\u4e2d\u7ef4\u62a4\u7740\u4e00\u4e2a\u6295\u7968\u8bb0\u5f55\u8868\uff0c\u5f53\u67d0\u4e2a\u8282\u70b9\u6536\u5230\u8fc7\u534a\u7684\u6295\u7968\u65f6\uff0c\u7ed3\u675f\u6295\u7968\u5e76\u628a\u8be5Follower\u9009\u4e3aLeader\uff0c\u6295\u7968\u7ed3\u675f\uff1b<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span class=\"\">Discovery:Follower \u8282\u70b9\u5411\u51c6 Leader\u63a8\u9001 FollwerInfo,\u8be5\u4fe1\u606f\u5305\u542b\u4e86\u4e0a\u4e00\u5468\u671f\u7684epoch\uff0c\u63a5\u53d7\u51c6 Leader \u7684 NEWLEADER \u6307\u4ee4<\/span><\/li>\n<li><span class=\"\">Sync\uff1a\u5c06 Follower \u4e0e Leader\u7684\u6570\u636e\u8fdb\u884c\u540c\u6b65\uff0c\u7531Leader\u53d1\u8d77\u540c\u6b65\u6307\u4ee4\uff0c\u6700\u7ec8\u4fdd\u6301\u6570\u636e\u7684\u4e00\u81f4\u6027<\/span><\/li>\n<li><span class=\"\">Broadcast\uff1aLeader\u5e7f\u64ad Proposal \u4e0e Commit\uff0cFollower \u63a5\u53d7 Proposal \u4e0e commit\u3002\u56e0\u4e3a\u4e00\u4e2a\u65f6\u523b\u53ea\u6709\u4e00\u4e2aLeader\u8282\u70b9\uff0c\u82e5\u662f\u66f4\u65b0\u8bf7\u6c42\uff0c\u53ea\u80fd\u7531Leader\u8282\u70b9\u6267\u884c\uff08\u82e5\u8fde\u5230\u7684\u662f Follower \u8282\u70b9\uff0c\u5219\u9700\u8f6c\u53d1\u5230Leader\u8282\u70b9\u6267\u884c\uff1b\u8bfb\u8bf7\u6c42\u53ef\u4ee5\u4eceFollower \u4e0a\u8bfb\u53d6\uff0c\u82e5\u662f\u8981\u6700\u65b0\u7684\u6570\u636e\uff0c\u5219\u8fd8\u662f\u9700\u8981\u5728 Leader\u4e0a\u8bfb\u53d6\uff09<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u6d88\u606f\u5e7f\u64ad\u4f7f\u7528\u4e86TCP\u534f\u8bae\u8fdb\u884c\u901a\u8baf\u6240\u6709\u4fdd\u8bc1\u4e86\u63a5\u53d7\u548c\u53d1\u9001\u4e8b\u52a1\u7684\u987a\u5e8f\u6027\u3002\u5e7f\u64ad\u6d88\u606f\u65f6Leader\u8282\u70b9\u4e3a\u6bcf\u4e2a\u4e8b\u52a1Proposal\u5206\u914d\u4e00\u4e2a\u5168\u5c40\u9012\u589e\u7684ZXID\uff08\u4e8b\u52a1ID\uff09\uff0c\u6bcf\u4e2a\u4e8b\u52a1Proposal\u90fd\u6309\u7167ZXID\u987a\u5e8f\u6765\u5904\u7406\uff08Paxos \u4fdd\u8bc1\u4e0d\u4e86\uff09<\/span><\/li>\n<li><span class=\"\">Leader\u8282\u70b9\u4e3a\u6bcf\u4e00\u4e2aFollower\u8282\u70b9\u5206\u914d\u4e00\u4e2a\u961f\u5217\u6309\u4e8b\u52a1ZXID\u987a\u5e8f\u653e\u5165\u5230\u961f\u5217\u4e2d\uff0c\u4e14\u6839\u636e\u961f\u5217\u7684\u89c4\u5219FIFO\u6765\u8fdb\u884c\u4e8b\u52a1\u7684\u53d1\u9001\u3002<\/span><span class=\"\">\u200b<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span class=\"\">Recovery \uff1a\u6839\u636eLeader\u7684\u4e8b\u52a1\u65e5\u5fd7\u5bf9Follower \u8282\u70b9\u6570\u636e\u8fdb\u884c\u540c\u6b65\u66f4\u65b0<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u540c\u6b65\u7b56\u7565\uff1a<\/span>\n<ol class=\"ol-list\">\n<li><span class=\"\"><strong>SNAP<\/strong> \uff1a\u5982\u679cFollower\u6570\u636e\u592a\u8001\uff0cLeader\u5c06\u53d1\u9001\u5feb\u7167SNAP\u6307\u4ee4\u7ed9Follower\u540c\u6b65\u6570\u636e\uff1b<\/span><\/li>\n<li><span class=\"\"><strong>DIFF<\/strong> \uff1aLeader\u53d1\u9001\u4eceFollolwer.lastZXID\u5230Leader.lastZXID\u8bae\u6848\u7684DIFF\u6307\u4ee4\u7ed9Follower\u540c\u6b65\u6570\u636e\uff1b<\/span><\/li>\n<li><span class=\"\"><strong>TRUNC<\/strong> \uff1a\u5f53Follower.lastZXID\u6bd4Leader.lastZXID\u5927\u65f6\uff0cLeader\u53d1\u9001\u4eceLeader.lastZXID\u5230Follower.lastZXID\u7684TRUNC\u6307\u4ee4\u8ba9Follower\u4e22\u5f03\u8be5\u6bb5\u6570\u636e\uff1b\uff08\u5f53\u8001Leader\u5728Commit\u524d\u6302\u6389\uff0c\u4f46\u662f\u5df2\u63d0\u4ea4\u5230\u672c\u5730\uff09<\/span><\/li>\n<\/ol>\n<\/li>\n<li><span class=\"\">Follower\u5c06\u6240\u6709\u4e8b\u52a1\u90fd\u540c\u6b65\u5b8c\u6210\u540eLeader\u4f1a\u628a\u8be5\u8282\u70b9\u6dfb\u52a0\u5230\u53ef\u7528Follower\u5217\u8868\u4e2d\uff1b<\/span><\/li>\n<li><span class=\"\">Follower\u63a5\u6536Leader\u7684NEWLEADER\u6307\u4ee4\uff0c\u5982\u679c\u8be5\u6307\u4ee4\u4e2depoch\u6bd4\u5f53\u524dFollower\u7684epoch\u5c0f\u90a3\u4e48Follower\u8f6c\u5230Election\u9636\u6bb5<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3 class=\"\">7. Raft \u7b97\u6cd5<\/h3>\n<ul class=\"ul-list\">\n<li><span class=\"\">Raft \u7b97\u6cd5\u4e5f\u662f\u4e00\u79cd\u5c11\u6570\u670d\u4ece\u591a\u6570\u7684\u7b97\u6cd5\uff0c\u5728\u4efb\u4f55\u65f6\u5019\u4e00\u4e2a\u670d\u52a1\u5668\u53ef\u4ee5\u626e\u6f14\u4ee5\u4e0b\u89d2\u8272\u4e4b\u4e00\uff1a<\/span>\n<ol class=\"ol-list\">\n<li><span class=\"\">Leader\uff1a\u8d1f\u8d23 Client \u4ea4\u4e92 \u548c log \u590d\u5236\uff0c\u540c\u4e00\u65f6\u523b\u7cfb\u7edf\u4e2d\u6700\u591a\u5b58\u5728\u4e00\u4e2a<\/span><\/li>\n<li><span class=\"\">Follower\uff1a\u88ab\u52a8\u54cd\u5e94\u8bf7\u6c42 RPC\uff0c\u4ece\u4e0d\u4e3b\u52a8\u53d1\u8d77\u8bf7\u6c42 RPC<\/span><\/li>\n<li><span class=\"\">Candidate : \u7531Follower \u5411Leader\u8f6c\u6362\u7684\u4e2d\u95f4\u72b6\u6001<\/span><\/li>\n<\/ol>\n<\/li>\n<li><span class=\"\">\u5728\u9009\u4e3eLeader\u7684\u8fc7\u7a0b\u4e2d\uff0c\u662f\u6709\u65f6\u95f4\u9650\u5236\u7684\uff0craft \u5c06\u65f6\u95f4\u5206\u4e3a\u4e00\u4e2a\u4e2a Term\uff0c\u53ef\u4ee5\u8ba4\u4e3a\u662f\u201c\u903b\u8f91\u65f6\u95f4\u201d\uff1a<\/span>\n<ol class=\"ol-list\">\n<li><span class=\"\">\u6bcf\u4e2a Term\u4e2d\u81f3\u591a\u5b58\u57281\u4e2a Leader<\/span><\/li>\n<li><span class=\"\">\u67d0\u4e9b Term\u7531\u4e8e\u4e0d\u6b62\u4e00\u4e2a\u5f97\u5230\u7684\u7968\u6570\u4e00\u6837\uff0c\u5c31\u4f1a\u9009\u4e3e\u5931\u8d25\uff0c\u4e0d\u5b58\u5728Leader\u3002\u5219\u4f1a\u51fa\u73b0 Split Vote \uff0c\u518d\u7531\u5019\u9009\u8005\u53d1\u51fa\u9080\u7968<\/span><\/li>\n<li><span class=\"\">\u6bcf\u4e2a Server \u672c\u5730\u7ef4\u62a4 currentTerm<\/span><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1330 size-full\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/88.png\" alt=\"\" width=\"518\" height=\"151\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/88.png 518w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/88-300x87.png 300w\" sizes=\"auto, (max-width: 518px) 100vw, 518px\" \/><\/li>\n<\/ol>\n<\/li>\n<li><span class=\"\">\u9009\u4e3e\u8fc7\u7a0b\uff1a<\/span>\n<ol class=\"ol-list\">\n<li><span class=\"\">\u81ea\u589e CurrentTerm\uff0c\u7531Follower \u8f6c\u6362\u4e3a Candidate\uff0c\u8bbe\u7f6e votedFor \u4e3a\u81ea\u8eab\uff0c\u5e76\u884c\u53d1\u8d77 RequestVote RPC,\u4e0d\u65ad\u91cd\u8bd5\uff0c\u76f4\u81f3\u6ee1\u8db3\u4e0b\u5217\u6761\u4ef6\u4e4b\u4e00\u4e3a\u6b62\uff1a<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u83b7\u5f97\u8d85\u8fc7\u534a\u6570\u7684Server\u7684\u6295\u7968\uff0c\u8f6c\u6362\u4e3a Leader\uff0c\u5e7f\u64ad HeatBeat<\/span><\/li>\n<li><span class=\"\">\u63a5\u6536\u5230 \u5408\u6cd5 Leader \u7684 AppendEnties RPC\uff0c\u8f6c\u6362\u4e3aFollower<\/span><\/li>\n<li><span class=\"\">\u9009\u4e3e\u8d85\u65f6\uff0c\u6ca1\u6709 Server\u9009\u4e3e\u6210\u529f\uff0c\u81ea\u589e currentTerm ,\u91cd\u65b0\u9009\u4e3e<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span class=\"\">\u5f53Candidate \u5728\u7b49\u5f85\u6295\u7968\u7ed3\u679c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u80fd\u4f1a\u63a5\u6536\u5230\u6765\u81ea\u5176\u4ed6Leader\u7684 AppendEntries RPC ,\u5982\u679c\u8be5 Leader \u7684 Term \u4e0d\u5c0f\u4e8e\u672c\u5730\u7684 Current Term\uff0c\u5219\u8ba4\u53ef\u8be5Leader\u8eab\u4efd\u7684\u5408\u6cd5\u6027\uff0c\u4e3b\u52a8\u964d\u7ea7\u4e3aFollower\uff0c\u53cd\u4e4b\uff0c\u5219\u7ef4\u6301 candida \u8eab\u4efd\u7ee7\u7eed\u7b49\u5f85\u6295\u7968\u7ed3\u679c<\/span><\/li>\n<li><span class=\"\">Candidate \u65e2\u6ca1\u6709\u9009\u4e3e\u6210\u529f\uff0c\u4e5f\u6ca1\u6709\u6536\u5230\u5176\u4ed6 Leader \u7684 RPC (\u591a\u4e2a\u8282\u70b9\u540c\u65f6\u53d1\u8d77\u9009\u4e3e\uff0c\u6700\u7ec8\u6bcf\u4e2a Candidate\u90fd\u5c06\u8d85\u65f6)\uff0c\u4e3a\u4e86\u51cf\u5c11\u51b2\u7a81\uff0c\u91c7\u53d6\u968f\u673a\u9000\u8ba9\u7b56\u7565\uff0c\u6bcf\u4e2a Candidate \u91cd\u542f\u9009\u4e3e\u5b9a\u65f6\u5668<\/span><\/li>\n<\/ol>\n<\/li>\n<li><span class=\"\">\u65e5\u5fd7\u66f4\u65b0\u95ee\u9898\uff1a<\/span><span class=\"\">\u5982\u679c\u5728\u65e5\u5fd7\u590d\u5236\u8fc7\u7a0b\u4e2d\uff0c\u53d1\u751f\u4e86\u7f51\u7edc\u5206\u533a\u6216\u8005\u7f51\u7edc\u901a\u4fe1\u6545\u969c\uff0c\u4f7f\u5f97Leader\u4e0d\u80fd\u8bbf\u95ee\u5927\u591a\u6570Follwers\u4e86\uff0c\u90a3\u4e48Leader\u53ea\u80fd\u6b63\u5e38\u66f4\u65b0\u5b83\u80fd\u8bbf\u95ee\u7684\u90a3\u4e9bFollower\u670d\u52a1\u5668\uff0c\u800c\u5927\u591a\u6570\u7684\u670d\u52a1\u5668Follower\u56e0\u4e3a\u6ca1\u6709\u4e86Leader\uff0c\u4ed6\u4eec\u91cd\u65b0\u9009\u4e3e\u4e00\u4e2a\u5019\u9009\u8005\u4f5c\u4e3aLeader\uff0c\u7136\u540e\u8fd9\u4e2aLeader\u4f5c\u4e3a\u4ee3\u8868\u4e8e\u5916\u754c\u6253\u4ea4\u9053\uff0c\u5982\u679c\u5916\u754c\u8981\u6c42\u5176\u6dfb\u52a0\u65b0\u7684\u65e5\u5fd7\uff0c\u8fd9\u4e2a\u65b0\u7684Leader\u5c31\u6309\u4e0a\u8ff0\u6b65\u9aa4\u901a\u77e5\u5927\u591a\u6570Followers\uff0c\u5982\u679c\u8fd9\u65f6\u7f51\u7edc\u6545\u969c\u4fee\u590d\u4e86\uff0c\u90a3\u4e48\u539f\u5148\u7684Leader\u5c31\u53d8\u6210Follower\uff0c\u5728\u5931\u8054\u9636\u6bb5\u8fd9\u4e2a\u8001Leader\u7684\u4efb\u4f55\u66f4\u65b0\u90fd\u4e0d\u80fd\u7b97commit\uff0c\u90fd\u56de\u6eda\uff0c\u63a5\u53d7\u65b0\u7684Leader\u7684\u65b0\u7684\u66f4\u65b0\u3002<\/span><\/li>\n<li><span class=\"\">\u6d41\u7a0b\uff1a<\/span>\n<ol class=\"ol-list\">\n<li><span class=\"\">Client \u53d1\u9001command \u547d\u4ee4\u7ed9 Leader <\/span><\/li>\n<li><span class=\"\">Leader\u8ffd\u52a0\u65e5\u5fd7\u9879\uff0c\u7b49\u5f85 commit \u66f4\u65b0\u672c\u5730\u72b6\u6001\u673a\uff0c\u6700\u7ec8\u54cd\u5e94 Client<\/span><\/li>\n<li><span class=\"\">\u82e5 Client\u8d85\u65f6\uff0c\u5219\u4e0d\u65ad\u91cd\u8bd5\uff0c\u76f4\u5230\u6536\u5230\u54cd\u5e94\u4e3a\u6b62\uff08\u91cd\u53d1 command\uff0c\u53ef\u80fd\u88ab\u6267\u884c\u591a\u6b21\uff0c\u5728\u88ab\u6267\u884c\u4f46\u662f\u7531\u4e8e\u7f51\u7edc\u901a\u4fe1\u95ee\u9898\u672a\u6536\u5230\u54cd\u5e94\uff09<\/span>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u89e3\u51b3\u529e\u6cd5\uff1aClient \u8d4b\u4e88\u6bcf\u4e2a Command\u552f\u4e00\u6807\u8bc6\uff0cLeader\u5728\u63a5\u6536 command \u4e4b\u524d\u9996\u5148\u68c0\u67e5\u672c\u5730log<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<h3 class=\"\">9. paxos \u7b97\u6cd5\u4e0e raft \u7b97\u6cd5\u7684\u5dee\u5f02<\/h3>\n<ol class=\"ol-list\">\n<li><span class=\"\">raft\u5f3a\u8c03\u662f\u552f\u4e00leader\u7684\u534f\u8bae\uff0c\u6b64leader\u81f3\u9ad8\u65e0\u4e0a<\/span><\/li>\n<li><span class=\"\">raft\uff1a\u65b0\u9009\u4e3e\u51fa\u6765\u7684leader\u62e5\u6709\u5168\u90e8\u63d0\u4ea4\u7684\u65e5\u5fd7\uff0c\u800c paxos \u9700\u8981\u989d\u5916\u7684\u6d41\u7a0b\u4ece\u5176\u4ed6\u8282\u70b9\u83b7\u53d6\u5df2\u7ecf\u88ab\u63d0\u4ea4\u7684\u65e5\u5fd7\uff0c\u5b83\u5141\u8bb8\u65e5\u5fd7\u6709\u7a7a\u6d1e<\/span><\/li>\n<\/ol>\n<ul class=\"ul-list\">\n<li><span class=\"\">\u76f8\u540c\u70b9\uff1a\u5f97\u5230\u5927\u591a\u6570\u7684\u8d5e\u6210\uff0c\u8fd9\u4e2a entries \u5c31\u4f1a\u5b9a\u4e0b\u6765\uff0c\u6700\u7ec8\u6240\u6709\u8282\u70b9\u90fd\u4f1a\u8d5e\u6210<\/span><\/li>\n<\/ul>\n<h3 class=\"\">NWR\u6a21\u578b<\/h3>\n<ul class=\"ul-list\">\n<li><span class=\"\">N\uff1a N\u4e2a\u5907\u4efd<\/span><\/li>\n<li><span class=\"\">W\uff1a\u8981\u5199\u5165\u81f3\u5c11 w \u4efd\u624d\u8ba4\u4e3a\u6210\u529f<\/span><\/li>\n<li><span class=\"\">R : \u81f3\u5c11\u8bfb\u53d6 R \u4e2a\u5907\u4efd<\/span><\/li>\n<\/ul>\n<ul class=\"ul-list\">\n<li><span class=\"\">W+ R &gt; N \u2014\u2014&gt; R &gt; N - W(\u672a\u66f4\u65b0\u6210\u529f\u7684) \uff0c\u4ee3\u8868\u6bcf\u6b21\u8bfb\u53d6\uff0c\u90fd\u81f3\u5c11\u8bfb\u53d6\u5230\u4e00\u4e2a\u6700\u65b0\u7684\u7248\u672c\uff08\u66f4\u65b0\u6210\u529f\u7684\uff09\uff0c\u4ece\u800c\u4e0d\u4f1a\u8bfb\u5230\u4e00\u4efd\u65e7\u6570\u636e<\/span><\/li>\n<li><span class=\"\">\u95ee\u9898\uff1a\u5e76\u975e\u5f3a\u4e00\u81f4\u6027\uff0c\u4f1a\u51fa\u73b0\u4e00\u4e9b\u8282\u70b9\u4e0a\u7684\u6570\u636e\u5e76\u4e0d\u662f\u6700\u65b0\u7248\u672c\uff0c\u4f46\u5374\u8fdb\u884c\u4e86\u6700\u65b0\u7684\u64cd\u4f5c<\/span><\/li>\n<li><span class=\"\">\u7248\u672c\u51b2\u7a81\u95ee\u9898\uff1a\u77e2\u91cf\u949f Vector Clock \uff1a \u8c01\u66f4\u65b0\u7684\u6211\uff0c\u6211\u7684\u7248\u672c\u53f7\u662f\u4ec0\u4e48\uff08\u5bf9\u4e8e\u540c\u4e00\u4e2a\u64cd\u4f5c\u8005\u7684\u540c\u4e00\u64cd\u4f5c\uff0c\u7248\u672c\u53f7\u9012\u589e\uff09 <\/span><\/li>\n<\/ul>\n<p><span class=\"\">\u53c2\u8003\u8d44\u6599\uff1a<\/span><\/p>\n<p><span class=\"\"><a href=\"http:\/\/www.tuicool.com\/articles\/IfQR3u3\" target=\"_blank\" rel=\"nofollow noopener\">http:\/\/www.tuicool.com\/articles\/IfQR3u3<\/a><\/span><\/p>\n<p><span class=\"\"><a href=\"http:\/\/blog.csdn.net\/chen77716\/article\/details\/7309915\" target=\"_blank\" rel=\"nofollow noopener\">http:\/\/blog.csdn.net\/chen77716\/article\/details\/7309915<\/a><\/span><\/p>\n<p><span class=\"\"><a href=\"http:\/\/www.infoq.com\/cn\/articles\/distributed-system-transaction-processing\/\" target=\"_blank\" rel=\"nofollow noopener\">http:\/\/www.infoq.com\/cn\/articles\/distributed-system-transaction-processing\/<\/a><\/span><\/p>\n<p><span class=\"\"><a href=\"http:\/\/www.jdon.com\/artichect\/raft.html\" target=\"_blank\" rel=\"nofollow noopener\">http:\/\/www.jdon.com\/artichect\/raft.html<\/a><\/span><\/p>\n<p><span class=\"\"><a href=\"http:\/\/blog.csdn.net\/cszhouwei\/article\/details\/38374603\" target=\"_blank\" rel=\"nofollow noopener\">http:\/\/blog.csdn.net\/cszhouwei\/article\/details\/38374603<\/a><\/span><\/p>\n<\/div>\n<\/div>\n<\/article>\n<div class=\"article-copyright\"><\/div>\n<div>\u6587\u7ae0\u8f6c\u81ea\uff1a<\/div>\n<div>https:\/\/blog.csdn.net\/followmyinclinations\/article\/details\/52870418<\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>.. 1.CAP\u539f\u7406 \u8981\u60f3\u6570\u636e\u9ad8\u53ef\u7528\uff0c\u5c31\u5f97\u5199\u591a\u4efd\u6570\u636e \u5199\u591a\u5206\u6570\u636e\u5c31\u4f1a\u5bfc\u81f4\u6570\u636e\u4e00\u81f4 &hellip; <a href=\"https:\/\/www.xiaobo.li\/notes\/archives\/1322\">\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":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[335],"tags":[332,333,334],"class_list":["post-1322","post","type-post","status-publish","format-standard","hentry","category-consensus","tag-paxos","tag-raft","tag-zab"],"_links":{"self":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/1322","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/comments?post=1322"}],"version-history":[{"count":0,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/1322\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/media?parent=1322"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/categories?post=1322"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/tags?post=1322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}