{"id":1391,"date":"2018-07-28T22:56:45","date_gmt":"2018-07-28T14:56:45","guid":{"rendered":"https:\/\/www.xiaobo.li\/?p=1391"},"modified":"2018-07-28T22:56:45","modified_gmt":"2018-07-28T14:56:45","slug":"paxos","status":"publish","type":"post","link":"https:\/\/www.xiaobo.li\/notes\/archives\/1391","title":{"rendered":"Paxos"},"content":{"rendered":"<p>Paxos\u7b97\u6cd5\u5728\u5206\u5e03\u5f0f\u9886\u57df\u5177\u6709\u975e\u5e38\u91cd\u8981\u7684\u5730\u4f4d\u3002\u4f46\u662fPaxos\u7b97\u6cd5\u6709\u4e24\u4e2a\u6bd4\u8f83\u660e\u663e\u7684\u7f3a\u70b9\uff1a1.\u96be\u4ee5\u7406\u89e3 2.\u5de5\u7a0b\u5b9e\u73b0\u66f4\u96be\u3002<\/p>\n<p>\u7f51\u4e0a\u6709\u5f88\u591a\u8bb2\u89e3Paxos\u7b97\u6cd5\u7684\u6587\u7ae0\uff0c\u4f46\u662f\u8d28\u91cf\u53c2\u5dee\u4e0d\u9f50\u3002\u770b\u4e86\u5f88\u591a\u5173\u4e8ePaxos\u7684\u8d44\u6599\u540e\u53d1\u73b0\uff0c\u5b66\u4e60Paxos\u6700\u597d\u7684\u8d44\u6599\u662f\u8bba\u6587\u300aPaxos Made Simple\u300b\uff0c\u5176\u6b21\u662f\u4e2d\u3001\u82f1\u6587\u7248\u7ef4\u57fa\u767e\u79d1\u5bf9Paxos\u7684\u4ecb\u7ecd\u3002\u672c\u6587\u8bd5\u56fe\u5e26\u5927\u5bb6\u4e00\u6b65\u6b65\u63ed\u5f00Paxos\u795e\u79d8\u7684\u9762\u7eb1\u3002<\/p>\n<h2 id=\"paxos\u662f\u4ec0\u4e48\">Paxos\u662f\u4ec0\u4e48<\/h2>\n<blockquote><p>Paxos\u7b97\u6cd5\u662f\u57fa\u4e8e<strong>\u6d88\u606f\u4f20\u9012<\/strong>\u4e14\u5177\u6709<strong>\u9ad8\u5ea6\u5bb9\u9519\u7279\u6027<\/strong>\u7684<strong>\u4e00\u81f4\u6027\u7b97\u6cd5<\/strong>\uff0c\u662f\u76ee\u524d\u516c\u8ba4\u7684\u89e3\u51b3<strong>\u5206\u5e03\u5f0f\u4e00\u81f4\u6027<\/strong>\u95ee\u9898<strong>\u6700\u6709\u6548<\/strong>\u7684\u7b97\u6cd5\u4e4b\u4e00\u3002<\/p><\/blockquote>\n<p>Google Chubby\u7684\u4f5c\u8005Mike Burrows\u8bf4\u8fc7\u8fd9\u4e2a\u4e16\u754c\u4e0a<strong>\u53ea\u6709\u4e00\u79cd<\/strong>\u4e00\u81f4\u6027\u7b97\u6cd5\uff0c\u90a3\u5c31\u662fPaxos\uff0c\u5176\u5b83\u7684\u7b97\u6cd5\u90fd\u662f<strong>\u6b8b\u6b21\u54c1<\/strong>\u3002<\/p>\n<p>\u867d\u7136Mike Burrows\u8bf4\u5f97\u6709\u70b9\u5938\u5f20\uff0c\u4f46\u662f\u81f3\u5c11\u8bf4\u660e\u4e86Paxos\u7b97\u6cd5\u7684\u5730\u4f4d\u3002\u7136\u800c\uff0cPaxos\u7b97\u6cd5\u4e5f\u56e0\u4e3a\u6666\u6da9\u96be\u61c2\u800c\u81ed\u540d\u662d\u8457\u3002\u672c\u6587\u7684\u76ee\u7684\u5c31\u662f\u5e26\u9886\u5927\u5bb6\u6df1\u5165\u6d45\u51fa\u7406\u89e3Paxos\u7b97\u6cd5\uff0c\u4e0d\u4ec5\u7406\u89e3\u5b83\u7684\u6267\u884c\u6d41\u7a0b\uff0c\u8fd8\u8981\u7406\u89e3\u7b97\u6cd5\u7684\u63a8\u5bfc\u8fc7\u7a0b\uff0c\u4f5c\u8005\u662f\u600e\u4e48\u4e00\u6b65\u6b65\u60f3\u5230\u6700\u7ec8\u7684\u65b9\u6848\u7684\u3002\u53ea\u6709\u7406\u89e3\u4e86\u63a8\u5bfc\u8fc7\u7a0b\uff0c\u624d\u80fd\u6df1\u523b\u638c\u63e1\u8be5\u7b97\u6cd5\u7684\u7cbe\u9ad3\u3002\u800c\u4e14\u7406\u89e3\u63a8\u5bfc\u8fc7\u7a0b\u5bf9\u4e8e\u6211\u4eec\u7684\u601d\u7ef4\u4e5f\u662f\u975e\u5e38\u6709\u5e2e\u52a9\u7684\uff0c\u53ef\u80fd\u4f1a\u7ed9\u6211\u4eec\u5e26\u6765\u4e00\u4e9b\u89e3\u51b3\u95ee\u9898\u7684\u601d\u8def\uff0c\u5bf9\u6211\u4eec\u6709\u6240\u542f\u53d1\u3002<\/p>\n<h2 id=\"\u95ee\u9898\u4ea7\u751f\u7684\u80cc\u666f\">\u95ee\u9898\u4ea7\u751f\u7684\u80cc\u666f<\/h2>\n<p>\u5728\u5e38\u89c1\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u603b\u4f1a\u53d1\u751f\u8bf8\u5982<strong>\u673a\u5668\u5b95\u673a<\/strong>\u6216<strong>\u7f51\u7edc\u5f02\u5e38<\/strong>\uff08\u5305\u62ec\u6d88\u606f\u7684\u5ef6\u8fdf\u3001\u4e22\u5931\u3001\u91cd\u590d\u3001\u4e71\u5e8f\uff0c\u8fd8\u6709\u7f51\u7edc\u5206\u533a\uff09\u7b49\u60c5\u51b5\u3002Paxos\u7b97\u6cd5\u9700\u8981\u89e3\u51b3\u7684\u95ee\u9898\u5c31\u662f\u5982\u4f55\u5728\u4e00\u4e2a\u53ef\u80fd\u53d1\u751f\u4e0a\u8ff0\u5f02\u5e38\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u5feb\u901f\u4e14\u6b63\u786e\u5730\u5728\u96c6\u7fa4\u5185\u90e8\u5bf9<strong>\u67d0\u4e2a\u6570\u636e\u7684\u503c<\/strong>\u8fbe\u6210<strong>\u4e00\u81f4<\/strong>\uff0c\u5e76\u4e14\u4fdd\u8bc1\u4e0d\u8bba\u53d1\u751f\u4ee5\u4e0a\u4efb\u4f55\u5f02\u5e38\uff0c\u90fd\u4e0d\u4f1a\u7834\u574f\u6574\u4e2a\u7cfb\u7edf\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u6ce8\uff1a\u8fd9\u91cc<strong>\u67d0\u4e2a\u6570\u636e\u7684\u503c<\/strong>\u5e76\u4e0d\u53ea\u662f\u72ed\u4e49\u4e0a\u7684\u67d0\u4e2a\u6570\uff0c\u5b83\u53ef\u4ee5\u662f\u4e00\u6761\u65e5\u5fd7\uff0c\u4e5f\u53ef\u4ee5\u662f\u4e00\u6761\u547d\u4ee4\uff08command\uff09\u3002\u3002\u3002\u6839\u636e\u5e94\u7528\u573a\u666f\u4e0d\u540c\uff0c<strong>\u67d0\u4e2a\u6570\u636e\u7684\u503c<\/strong>\u6709\u4e0d\u540c\u7684\u542b\u4e49\u3002<\/p>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/01-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1392 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/01-1-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/01-1-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/01-1-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/01-1-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/01-1.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<h2 id=\"\u76f8\u5173\u6982\u5ff5\">\u76f8\u5173\u6982\u5ff5<\/h2>\n<p>\u5728Paxos\u7b97\u6cd5\u4e2d\uff0c\u6709\u4e09\u79cd\u89d2\u8272\uff1a<\/p>\n<ul>\n<li><strong>Proposer<\/strong><\/li>\n<li><strong>Acceptor<\/strong><\/li>\n<li><strong>Learners<\/strong><\/li>\n<\/ul>\n<p>\u5728\u5177\u4f53\u7684\u5b9e\u73b0\u4e2d\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u80fd<strong>\u540c\u65f6\u5145\u5f53\u591a\u79cd\u89d2\u8272<\/strong>\u3002\u6bd4\u5982\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u80fd<strong>\u65e2\u662fProposer\u53c8\u662fAcceptor\u53c8\u662fLearner<\/strong>\u3002<\/p>\n<p>\u8fd8\u6709\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u6982\u5ff5\u53eb<strong>\u63d0\u6848\uff08Proposal\uff09<\/strong>\u3002\u6700\u7ec8\u8981\u8fbe\u6210\u4e00\u81f4\u7684value\u5c31\u5728\u63d0\u6848\u91cc\u3002<\/p>\n<p><strong>\u6ce8\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u6682\u4e14<\/strong>\u8ba4\u4e3a\u300e<strong>\u63d0\u6848=value<\/strong>\u300f\uff0c\u5373\u63d0\u6848\u53ea\u5305\u542bvalue\u3002\u5728\u6211\u4eec\u63a5\u4e0b\u6765\u7684\u63a8\u5bfc\u8fc7\u7a0b\u4e2d\u4f1a\u53d1\u73b0\u5982\u679c\u63d0\u6848\u53ea\u5305\u542bvalue\uff0c\u4f1a\u6709\u95ee\u9898\uff0c\u4e8e\u662f\u6211\u4eec\u518d\u5bf9\u63d0\u6848<strong>\u91cd\u65b0\u8bbe\u8ba1<\/strong>\u3002<\/li>\n<li><strong>\u6682\u4e14<\/strong>\u8ba4\u4e3a\u300e<strong>Proposer\u53ef\u4ee5\u76f4\u63a5\u63d0\u51fa\u63d0\u6848<\/strong>\u300f\u3002\u5728\u6211\u4eec\u63a5\u4e0b\u6765\u7684\u63a8\u5bfc\u8fc7\u7a0b\u4e2d\u4f1a\u53d1\u73b0\u5982\u679cProposer\u76f4\u63a5\u63d0\u51fa\u63d0\u6848\u4f1a\u6709\u95ee\u9898\uff0c\u9700\u8981\u589e\u52a0\u4e00\u4e2a\u5b66\u4e60\u63d0\u6848\u7684\u8fc7\u7a0b\u3002<\/li>\n<\/ul>\n<p>Proposer\u53ef\u4ee5\u63d0\u51fa\uff08propose\uff09\u63d0\u6848\uff1bAcceptor\u53ef\u4ee5\u63a5\u53d7\uff08accept\uff09\u63d0\u6848\uff1b\u5982\u679c\u67d0\u4e2a\u63d0\u6848\u88ab\u9009\u5b9a\uff08chosen\uff09\uff0c\u90a3\u4e48\u8be5\u63d0\u6848\u91cc\u7684value\u5c31\u88ab\u9009\u5b9a\u4e86\u3002<\/p>\n<p>\u56de\u5230\u521a\u521a\u8bf4\u7684\u300e\u5bf9\u67d0\u4e2a\u6570\u636e\u7684\u503c\u8fbe\u6210\u4e00\u81f4\u300f\uff0c\u6307\u7684\u662fProposer\u3001Acceptor\u3001Learner\u90fd\u8ba4\u4e3a\u540c\u4e00\u4e2avalue\u88ab\u9009\u5b9a\uff08chosen\uff09\u3002\u90a3\u4e48\uff0cProposer\u3001Acceptor\u3001Learner\u5206\u522b\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u624d\u80fd\u8ba4\u4e3a\u67d0\u4e2avalue\u88ab\u9009\u5b9a\u5462\uff1f<\/p>\n<ul>\n<li>Proposer\uff1a\u53ea\u8981Proposer\u53d1\u7684\u63d0\u6848\u88abAcceptor\u63a5\u53d7\uff08\u521a\u5f00\u59cb\u5148\u8ba4\u4e3a\u53ea\u9700\u8981\u4e00\u4e2aAcceptor\u63a5\u53d7\u5373\u53ef\uff0c\u5728\u63a8\u5bfc\u8fc7\u7a0b\u4e2d\u4f1a\u53d1\u73b0\u9700\u8981\u534a\u6570\u4ee5\u4e0a\u7684Acceptor\u540c\u610f\u624d\u884c\uff09\uff0cProposer\u5c31\u8ba4\u4e3a\u8be5\u63d0\u6848\u91cc\u7684value\u88ab\u9009\u5b9a\u4e86\u3002<\/li>\n<li>Acceptor\uff1a\u53ea\u8981Acceptor\u63a5\u53d7\u4e86\u67d0\u4e2a\u63d0\u6848\uff0cAcceptor\u5c31\u4efb\u52a1\u8be5\u63d0\u6848\u91cc\u7684value\u88ab\u9009\u5b9a\u4e86\u3002<\/li>\n<li>Learner\uff1aAcceptor\u544a\u8bc9Learner\u54ea\u4e2avalue\u88ab\u9009\u5b9a\uff0cLearner\u5c31\u8ba4\u4e3a\u90a3\u4e2avalue\u88ab\u9009\u5b9a\u3002<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/02-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1393 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/02-1-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/02-1-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/02-1-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/02-1-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/02-1.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<h2 id=\"\u95ee\u9898\u63cf\u8ff0\">\u95ee\u9898\u63cf\u8ff0<\/h2>\n<p>\u5047\u8bbe\u6709\u4e00\u7ec4\u53ef\u4ee5<strong>\u63d0\u51fa\uff08propose\uff09value<\/strong>\uff08value\u5728\u63d0\u6848Proposal\u91cc\uff09\u7684<strong>\u8fdb\u7a0b\u96c6\u5408<\/strong>\u3002\u4e00\u4e2a\u4e00\u81f4\u6027\u7b97\u6cd5\u9700\u8981\u4fdd\u8bc1\u63d0\u51fa\u7684\u8fd9\u4e48\u591avalue\u4e2d\uff0c<strong>\u53ea\u6709\u4e00\u4e2a<\/strong>value\u88ab\u9009\u5b9a\uff08chosen\uff09\u3002\u5982\u679c\u6ca1\u6709value\u88ab\u63d0\u51fa\uff0c\u5c31\u4e0d\u5e94\u8be5\u6709value\u88ab\u9009\u5b9a\u3002\u5982\u679c\u4e00\u4e2avalue\u88ab\u9009\u5b9a\uff0c\u90a3\u4e48\u6240\u6709\u8fdb\u7a0b\u90fd\u5e94\u8be5\u80fd<strong>\u5b66\u4e60\uff08learn\uff09<\/strong>\u5230\u8fd9\u4e2a\u88ab\u9009\u5b9a\u7684value\u3002\u5bf9\u4e8e\u4e00\u81f4\u6027\u7b97\u6cd5\uff0c<strong>\u5b89\u5168\u6027\uff08safaty\uff09<\/strong>\u8981\u6c42\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u53ea\u6709\u88ab\u63d0\u51fa\u7684value\u624d\u80fd\u88ab\u9009\u5b9a\u3002<\/li>\n<li>\u53ea\u6709\u4e00\u4e2avalue\u88ab\u9009\u5b9a\uff0c\u5e76\u4e14<\/li>\n<li>\u5982\u679c\u67d0\u4e2a\u8fdb\u7a0b\u8ba4\u4e3a\u67d0\u4e2avalue\u88ab\u9009\u5b9a\u4e86\uff0c\u90a3\u4e48\u8fd9\u4e2avalue\u5fc5\u987b\u662f\u771f\u7684\u88ab\u9009\u5b9a\u7684\u90a3\u4e2a\u3002<\/li>\n<\/ul>\n<p>\u6211\u4eec\u4e0d\u53bb\u7cbe\u786e\u5730\u5b9a\u4e49\u5176<strong>\u6d3b\u6027\uff08liveness\uff09<\/strong>\u8981\u6c42\u3002\u6211\u4eec\u7684\u76ee\u6807\u662f\u4fdd\u8bc1<strong>\u6700\u7ec8\u6709\u4e00\u4e2a\u63d0\u51fa\u7684value\u88ab\u9009\u5b9a<\/strong>\u3002\u5f53\u4e00\u4e2avalue\u88ab\u9009\u5b9a\u540e\uff0c\u8fdb\u7a0b\u6700\u7ec8\u4e5f\u80fd\u5b66\u4e60\u5230\u8fd9\u4e2avalue\u3002<\/p>\n<blockquote><p>Paxos\u7684\u76ee\u6807\uff1a\u4fdd\u8bc1\u6700\u7ec8\u6709\u4e00\u4e2avalue\u4f1a\u88ab\u9009\u5b9a\uff0c\u5f53value\u88ab\u9009\u5b9a\u540e\uff0c\u8fdb\u7a0b\u6700\u7ec8\u4e5f\u80fd\u83b7\u53d6\u5230\u88ab\u9009\u5b9a\u7684value\u3002<\/p><\/blockquote>\n<p>\u5047\u8bbe\u4e0d\u540c\u89d2\u8272\u4e4b\u95f4\u53ef\u4ee5\u901a\u8fc7\u53d1\u9001\u6d88\u606f\u6765\u8fdb\u884c\u901a\u4fe1\uff0c\u90a3\u4e48\uff1a<\/p>\n<ul>\n<li>\u6bcf\u4e2a\u89d2\u8272\u4ee5\u4efb\u610f\u7684\u901f\u5ea6\u6267\u884c\uff0c\u53ef\u80fd\u56e0\u51fa\u9519\u800c\u505c\u6b62\uff0c\u4e5f\u53ef\u80fd\u4f1a\u91cd\u542f\u3002\u4e00\u4e2avalue\u88ab\u9009\u5b9a\u540e\uff0c\u6240\u6709\u7684\u89d2\u8272\u53ef\u80fd\u5931\u8d25\u7136\u540e\u91cd\u542f\uff0c\u9664\u975e\u90a3\u4e9b\u5931\u8d25\u540e\u91cd\u542f\u7684\u89d2\u8272\u80fd\u8bb0\u5f55\u67d0\u4e9b\u4fe1\u606f\uff0c\u5426\u5219\u7b49\u4ed6\u4eec\u91cd\u542f\u540e\u65e0\u6cd5\u786e\u5b9a\u88ab\u9009\u5b9a\u7684\u503c\u3002<\/li>\n<li>\u6d88\u606f\u5728\u4f20\u9012\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u51fa\u73b0\u4efb\u610f\u65f6\u957f\u7684\u5ef6\u8fdf\uff0c\u53ef\u80fd\u4f1a\u91cd\u590d\uff0c\u4e5f\u53ef\u80fd\u4e22\u5931\u3002\u4f46\u662f\u6d88\u606f\u4e0d\u4f1a\u88ab\u635f\u574f\uff0c\u5373\u6d88\u606f\u5185\u5bb9\u4e0d\u4f1a\u88ab\u7be1\u6539\uff08\u62dc\u5360\u5ead\u5c06\u519b\u95ee\u9898\uff09\u3002<\/li>\n<\/ul>\n<h2 id=\"\u63a8\u5bfc\u8fc7\u7a0b\">\u63a8\u5bfc\u8fc7\u7a0b<\/h2>\n<h3 id=\"\u6700\u7b80\u5355\u7684\u65b9\u6848\u53ea\u6709\u4e00\u4e2aacceptor\">\u6700\u7b80\u5355\u7684\u65b9\u6848\u2014\u2014\u53ea\u6709\u4e00\u4e2aAcceptor<\/h3>\n<p>\u5047\u8bbe\u53ea\u6709\u4e00\u4e2aAcceptor\uff08\u53ef\u4ee5\u6709\u591a\u4e2aProposer\uff09\uff0c\u53ea\u8981Acceptor\u63a5\u53d7\u5b83\u6536\u5230\u7684\u7b2c\u4e00\u4e2a\u63d0\u6848\uff0c\u5219\u8be5\u63d0\u6848\u88ab\u9009\u5b9a\uff0c\u8be5\u63d0\u6848\u91cc\u7684value\u5c31\u662f\u88ab\u9009\u5b9a\u7684value\u3002\u8fd9\u6837\u5c31\u4fdd\u8bc1\u53ea\u6709\u4e00\u4e2avalue\u4f1a\u88ab\u9009\u5b9a\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u5982\u679c\u8fd9\u4e2a\u552f\u4e00\u7684Acceptor\u5b95\u673a\u4e86\uff0c\u90a3\u4e48\u6574\u4e2a\u7cfb\u7edf\u5c31<strong>\u65e0\u6cd5\u5de5\u4f5c<\/strong>\u4e86\uff01<\/p>\n<p>\u56e0\u6b64\uff0c\u5fc5\u987b\u8981\u6709<strong>\u591a\u4e2aAcceptor<\/strong>\uff01<\/p>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/03-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1394 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/03-1-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/03-1-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/03-1-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/03-1-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/03-1.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<h3 id=\"\u591a\u4e2aacceptor\">\u591a\u4e2aAcceptor<\/h3>\n<p>\u591a\u4e2aAcceptor\u7684\u60c5\u51b5\u5982\u4e0b\u56fe\u3002\u90a3\u4e48\uff0c\u5982\u4f55\u4fdd\u8bc1\u5728\u591a\u4e2aProposer\u548c\u591a\u4e2aAcceptor\u7684\u60c5\u51b5\u4e0b\u9009\u5b9a\u4e00\u4e2avalue\u5462\uff1f<\/p>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/04-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1395 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/04-1-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/04-1-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/04-1-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/04-1-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/04-1.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>\u4e0b\u9762\u5f00\u59cb\u5bfb\u627e\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<p>\u5982\u679c\u6211\u4eec\u5e0c\u671b\u5373\u4f7f\u53ea\u6709\u4e00\u4e2aProposer\u63d0\u51fa\u4e86\u4e00\u4e2avalue\uff0c\u8be5value\u4e5f\u6700\u7ec8\u88ab\u9009\u5b9a\u3002<\/p>\n<p>\u90a3\u4e48\uff0c\u5c31\u5f97\u5230\u4e0b\u9762\u7684\u7ea6\u675f\uff1a<\/p>\n<blockquote><p>P1\uff1a\u4e00\u4e2aAcceptor\u5fc5\u987b\u63a5\u53d7\u5b83\u6536\u5230\u7684\u7b2c\u4e00\u4e2a\u63d0\u6848\u3002<\/p><\/blockquote>\n<p>\u4f46\u662f\uff0c\u8fd9\u53c8\u4f1a\u5f15\u51fa\u53e6\u4e00\u4e2a\u95ee\u9898\uff1a\u5982\u679c\u6bcf\u4e2aProposer\u5206\u522b\u63d0\u51fa\u4e0d\u540c\u7684value\uff0c\u53d1\u7ed9\u4e0d\u540c\u7684Acceptor\u3002\u6839\u636eP1\uff0cAcceptor\u5206\u522b\u63a5\u53d7\u81ea\u5df1\u6536\u5230\u7684value\uff0c\u5c31\u5bfc\u81f4\u4e0d\u540c\u7684value\u88ab\u9009\u5b9a\u3002\u51fa\u73b0\u4e86\u4e0d\u4e00\u81f4\u3002\u5982\u4e0b\u56fe\uff1a<\/p>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/05-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1396 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/05-1-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/05-1-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/05-1-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/05-1-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/05-1.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>\u521a\u521a\u662f\u56e0\u4e3a\u300e\u4e00\u4e2a\u63d0\u6848\u53ea\u8981\u88ab\u4e00\u4e2aAcceptor\u63a5\u53d7\uff0c\u5219\u8be5\u63d0\u6848\u7684value\u5c31\u88ab\u9009\u5b9a\u4e86\u300f\u624d\u5bfc\u81f4\u4e86\u51fa\u73b0\u4e0a\u9762\u4e0d\u4e00\u81f4\u7684\u95ee\u9898\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u52a0\u4e00\u4e2a\u89c4\u5b9a\uff1a<\/p>\n<blockquote><p>\u89c4\u5b9a\uff1a\u4e00\u4e2a\u63d0\u6848\u88ab\u9009\u5b9a\u9700\u8981\u88ab<strong>\u534a\u6570\u4ee5\u4e0a<\/strong>\u7684Acceptor\u63a5\u53d7<\/p><\/blockquote>\n<p>\u8fd9\u4e2a\u89c4\u5b9a\u53c8\u6697\u793a\u4e86\uff1a\u300e\u4e00\u4e2aAcceptor\u5fc5\u987b\u80fd\u591f\u63a5\u53d7\u4e0d\u6b62\u4e00\u4e2a\u63d0\u6848\uff01\u300f\u4e0d\u7136\u53ef\u80fd\u5bfc\u81f4\u6700\u7ec8\u6ca1\u6709value\u88ab\u9009\u5b9a\u3002\u6bd4\u5982\u4e0a\u56fe\u7684\u60c5\u51b5\u3002v1\u3001v2\u3001v3\u90fd\u6ca1\u6709\u88ab\u9009\u5b9a\uff0c\u56e0\u4e3a\u5b83\u4eec\u90fd\u53ea\u88ab\u4e00\u4e2aAcceptor\u7684\u63a5\u53d7\u3002<\/p>\n<p>\u6700\u5f00\u59cb\u8bb2\u7684\u300e<strong>\u63d0\u6848=value<\/strong>\u300f\u5df2\u7ecf\u4e0d\u80fd\u6ee1\u8db3\u9700\u6c42\u4e86\uff0c\u4e8e\u662f\u91cd\u65b0\u8bbe\u8ba1\u63d0\u6848\uff0c\u7ed9\u6bcf\u4e2a\u63d0\u6848\u52a0\u4e0a\u4e00\u4e2a\u63d0\u6848\u7f16\u53f7\uff0c\u8868\u793a\u63d0\u6848\u88ab\u63d0\u51fa\u7684\u987a\u5e8f\u3002\u4ee4\u300e<strong>\u63d0\u6848=\u63d0\u6848\u7f16\u53f7+value<\/strong>\u300f\u3002<\/p>\n<p>\u867d\u7136\u5141\u8bb8\u591a\u4e2a\u63d0\u6848\u88ab\u9009\u5b9a\uff0c\u4f46\u5fc5\u987b\u4fdd\u8bc1\u6240\u6709\u88ab\u9009\u5b9a\u7684\u63d0\u6848\u90fd\u5177\u6709\u76f8\u540c\u7684value\u503c\u3002\u5426\u5219\u53c8\u4f1a\u51fa\u73b0\u4e0d\u4e00\u81f4\u3002<\/p>\n<p>\u4e8e\u662f\u6709\u4e86\u4e0b\u9762\u7684\u7ea6\u675f\uff1a<\/p>\n<blockquote><p>P2\uff1a\u5982\u679c\u67d0\u4e2avalue\u4e3av\u7684\u63d0\u6848\u88ab\u9009\u5b9a\u4e86\uff0c\u90a3\u4e48\u6bcf\u4e2a\u7f16\u53f7\u66f4\u9ad8\u7684\u88ab\u9009\u5b9a\u63d0\u6848\u7684value\u5fc5\u987b\u4e5f\u662fv\u3002<\/p><\/blockquote>\n<p>\u4e00\u4e2a\u63d0\u6848\u53ea\u6709\u88abAcceptor\u63a5\u53d7\u624d\u53ef\u80fd\u88ab\u9009\u5b9a\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u628aP2\u7ea6\u675f\u6539\u5199\u6210\u5bf9Acceptor\u63a5\u53d7\u7684\u63d0\u6848\u7684\u7ea6\u675fP2a\u3002<\/p>\n<blockquote><p>P2a\uff1a\u5982\u679c\u67d0\u4e2avalue\u4e3av\u7684\u63d0\u6848\u88ab\u9009\u5b9a\u4e86\uff0c\u90a3\u4e48\u6bcf\u4e2a\u7f16\u53f7\u66f4\u9ad8\u7684\u88abAcceptor\u63a5\u53d7\u7684\u63d0\u6848\u7684value\u5fc5\u987b\u4e5f\u662fv\u3002<\/p><\/blockquote>\n<p>\u53ea\u8981\u6ee1\u8db3\u4e86P2a\uff0c\u5c31\u80fd\u6ee1\u8db3P2\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u8003\u8651\u5982\u4e0b\u7684\u60c5\u51b5\uff1a\u5047\u8bbe\u603b\u7684\u67095\u4e2aAcceptor\u3002Proposer2\u63d0\u51fa[M1,V1]\u7684\u63d0\u6848\uff0cAcceptor2~5\uff08\u534a\u6570\u4ee5\u4e0a\uff09\u5747\u63a5\u53d7\u4e86\u8be5\u63d0\u6848\uff0c\u4e8e\u662f\u5bf9\u4e8eAcceptor2~5\u548cProposer2\u6765\u8bb2\uff0c\u5b83\u4eec\u90fd\u8ba4\u4e3aV1\u88ab\u9009\u5b9a\u3002Acceptor1\u521a\u521a\u4ece\u5b95\u673a\u72b6\u6001\u6062\u590d\u8fc7\u6765\uff08\u4e4b\u524dAcceptor1\u6ca1\u6709\u6536\u5230\u8fc7\u4efb\u4f55\u63d0\u6848\uff09\uff0c\u6b64\u65f6Proposer1\u5411Acceptor1\u53d1\u9001\u4e86[M2,V2]\u7684\u63d0\u6848\uff08V2\u2260V1\u4e14M2&gt;M1\uff09\uff0c\u5bf9\u4e8eAcceptor1\u6765\u8bb2\uff0c\u8fd9\u662f\u5b83\u6536\u5230\u7684\u7b2c\u4e00\u4e2a\u63d0\u6848\u3002\u6839\u636eP1\uff08\u4e00\u4e2aAcceptor\u5fc5\u987b\u63a5\u53d7\u5b83\u6536\u5230\u7684\u7b2c\u4e00\u4e2a\u63d0\u6848\u3002\uff09,Acceptor1\u5fc5\u987b\u63a5\u53d7\u8be5\u63d0\u6848\uff01\u540c\u65f6Acceptor1\u8ba4\u4e3aV2\u88ab\u9009\u5b9a\u3002\u8fd9\u5c31\u51fa\u73b0\u4e86\u4e24\u4e2a\u95ee\u9898\uff1a<\/p>\n<ol>\n<li>Acceptor1\u8ba4\u4e3aV2\u88ab\u9009\u5b9a\uff0cAcceptor2~5\u548cProposer2\u8ba4\u4e3aV1\u88ab\u9009\u5b9a\u3002\u51fa\u73b0\u4e86\u4e0d\u4e00\u81f4\u3002<\/li>\n<li>V1\u88ab\u9009\u5b9a\u4e86\uff0c\u4f46\u662f\u7f16\u53f7\u66f4\u9ad8\u7684\u88abAcceptor1\u63a5\u53d7\u7684\u63d0\u6848[M2,V2]\u7684value\u4e3aV2\uff0c\u4e14V2\u2260V1\u3002\u8fd9\u5c31\u8ddfP2a\uff08\u5982\u679c\u67d0\u4e2avalue\u4e3av\u7684\u63d0\u6848\u88ab\u9009\u5b9a\u4e86\uff0c\u90a3\u4e48\u6bcf\u4e2a\u7f16\u53f7\u66f4\u9ad8\u7684\u88abAcceptor\u63a5\u53d7\u7684\u63d0\u6848\u7684value\u5fc5\u987b\u4e5f\u662fv\uff09\u77db\u76fe\u4e86\u3002<\/li>\n<\/ol>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/06-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1397 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/06-1-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/06-1-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/06-1-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/06-1-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/06-1.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>\u6240\u4ee5\u6211\u4eec\u8981\u5bf9P2a\u7ea6\u675f\u8fdb\u884c\u5f3a\u5316\uff01<\/p>\n<p>P2a\u662f\u5bf9Acceptor\u63a5\u53d7\u7684\u63d0\u6848\u7ea6\u675f\uff0c\u4f46\u5176\u5b9e\u63d0\u6848\u662fProposer\u63d0\u51fa\u6765\u7684\uff0c\u6240\u6709\u6211\u4eec\u53ef\u4ee5\u5bf9Proposer\u63d0\u51fa\u7684\u63d0\u6848\u8fdb\u884c\u7ea6\u675f\u3002\u5f97\u5230P2b\uff1a<\/p>\n<blockquote><p>P2b\uff1a\u5982\u679c\u67d0\u4e2avalue\u4e3av\u7684\u63d0\u6848\u88ab\u9009\u5b9a\u4e86\uff0c\u90a3\u4e48\u4e4b\u540e\u4efb\u4f55Proposer\u63d0\u51fa\u7684\u7f16\u53f7\u66f4\u9ad8\u7684\u63d0\u6848\u7684value\u5fc5\u987b\u4e5f\u662fv\u3002<\/p><\/blockquote>\n<p>\u7531P2b\u53ef\u4ee5\u63a8\u51faP2a\u8fdb\u800c\u63a8\u51faP2\u3002<\/p>\n<p>\u90a3\u4e48\uff0c\u5982\u4f55\u786e\u4fdd\u5728\u67d0\u4e2avalue\u4e3av\u7684\u63d0\u6848\u88ab\u9009\u5b9a\u540e\uff0cProposer\u63d0\u51fa\u7684\u7f16\u53f7\u66f4\u9ad8\u7684\u63d0\u6848\u7684value\u90fd\u662fv\u5462\uff1f<\/p>\n<p>\u53ea\u8981\u6ee1\u8db3P2c\u5373\u53ef\uff1a<\/p>\n<blockquote><p>P2c\uff1a\u5bf9\u4e8e\u4efb\u610f\u7684N\u548cV\uff0c\u5982\u679c\u63d0\u6848[N, V]\u88ab\u63d0\u51fa\uff0c\u90a3\u4e48\u5b58\u5728\u4e00\u4e2a\u534a\u6570\u4ee5\u4e0a\u7684Acceptor\u7ec4\u6210\u7684\u96c6\u5408S\uff0c\u6ee1\u8db3\u4ee5\u4e0b\u4e24\u4e2a\u6761\u4ef6\u4e2d\u7684\u4efb\u610f\u4e00\u4e2a\uff1a<\/p><\/blockquote>\n<ul>\n<li>S\u4e2d\u6bcf\u4e2aAcceptor\u90fd\u6ca1\u6709\u63a5\u53d7\u8fc7\u7f16\u53f7\u5c0f\u4e8eN\u7684\u63d0\u6848\u3002<\/li>\n<li>S\u4e2dAcceptor\u63a5\u53d7\u8fc7\u7684\u6700\u5927\u7f16\u53f7\u7684\u63d0\u6848\u7684value\u4e3aV\u3002<\/li>\n<\/ul>\n<h3 id=\"proposer\u751f\u6210\u63d0\u6848\">Proposer\u751f\u6210\u63d0\u6848<\/h3>\n<p>\u4e3a\u4e86\u6ee1\u8db3P2b\uff0c\u8fd9\u91cc\u6709\u4e2a\u6bd4\u8f83\u91cd\u8981\u7684\u601d\u60f3\uff1aProposer\u751f\u6210\u63d0\u6848\u4e4b\u524d\uff0c\u5e94\u8be5\u5148\u53bb<strong>\u300e\u5b66\u4e60\u300f<\/strong>\u5df2\u7ecf\u88ab\u9009\u5b9a\u6216\u8005\u53ef\u80fd\u88ab\u9009\u5b9a\u7684value\uff0c\u7136\u540e\u4ee5\u8be5value\u4f5c\u4e3a\u81ea\u5df1\u63d0\u51fa\u7684\u63d0\u6848\u7684value\u3002\u5982\u679c\u6ca1\u6709value\u88ab\u9009\u5b9a\uff0cProposer\u624d\u53ef\u4ee5\u81ea\u5df1\u51b3\u5b9avalue\u7684\u503c\u3002\u8fd9\u6837\u624d\u80fd\u8fbe\u6210\u4e00\u81f4\u3002\u8fd9\u4e2a\u5b66\u4e60\u7684\u9636\u6bb5\u662f\u901a\u8fc7\u4e00\u4e2a<strong>\u300ePrepare\u8bf7\u6c42\u300f<\/strong>\u5b9e\u73b0\u7684\u3002<\/p>\n<p>\u4e8e\u662f\u6211\u4eec\u5f97\u5230\u4e86\u5982\u4e0b\u7684<strong>\u63d0\u6848\u751f\u6210\u7b97\u6cd5<\/strong>\uff1a<\/p>\n<ol>\n<li>Proposer\u9009\u62e9\u4e00\u4e2a<strong>\u65b0\u7684\u63d0\u6848\u7f16\u53f7N<\/strong>\uff0c\u7136\u540e\u5411<strong>\u67d0\u4e2aAcceptor\u96c6\u5408<\/strong>\uff08\u534a\u6570\u4ee5\u4e0a\uff09\u53d1\u9001\u8bf7\u6c42\uff0c\u8981\u6c42\u8be5\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2aAcceptor\u505a\u51fa\u5982\u4e0b\u54cd\u5e94\uff08response\uff09\u3002<\/li>\n<\/ol>\n<p>(a) \u5411Proposer\u627f\u8bfa\u4fdd\u8bc1<strong>\u4e0d\u518d\u63a5\u53d7<\/strong>\u4efb\u4f55\u7f16\u53f7<strong>\u5c0f\u4e8eN\u7684\u63d0\u6848<\/strong>\u3002<\/p>\n<p>(b) \u5982\u679cAcceptor\u5df2\u7ecf\u63a5\u53d7\u8fc7\u63d0\u6848\uff0c\u90a3\u4e48\u5c31\u5411Proposer\u54cd\u5e94<strong>\u5df2\u7ecf\u63a5\u53d7\u8fc7<\/strong>\u7684\u7f16\u53f7\u5c0f\u4e8eN\u7684<strong>\u6700\u5927\u7f16\u53f7\u7684\u63d0\u6848<\/strong>\u3002<\/p>\n<p>\u6211\u4eec\u5c06\u8be5\u8bf7\u6c42\u79f0\u4e3a<strong>\u7f16\u53f7\u4e3aN<\/strong>\u7684<strong>Prepare\u8bf7\u6c42<\/strong>\u3002<\/p>\n<ol>\n<li>\u5982\u679cProposer\u6536\u5230\u4e86<strong>\u534a\u6570\u4ee5\u4e0a<\/strong>\u7684Acceptor\u7684<strong>\u54cd\u5e94<\/strong>\uff0c\u90a3\u4e48\u5b83\u5c31\u53ef\u4ee5\u751f\u6210\u7f16\u53f7\u4e3aN\uff0cValue\u4e3aV\u7684<strong>\u63d0\u6848[N,V]<\/strong>\u3002\u8fd9\u91cc\u7684V\u662f\u6240\u6709\u7684\u54cd\u5e94\u4e2d<strong>\u7f16\u53f7\u6700\u5927\u7684\u63d0\u6848\u7684Value<\/strong>\u3002\u5982\u679c\u6240\u6709\u7684\u54cd\u5e94\u4e2d<strong>\u90fd\u6ca1\u6709\u63d0\u6848<\/strong>\uff0c\u90a3 \u4e48\u6b64\u65f6V\u5c31\u53ef\u4ee5\u7531Proposer<strong>\u81ea\u5df1\u9009\u62e9<\/strong>\u3002<br \/>\n\u751f\u6210\u63d0\u6848\u540e\uff0cProposer\u5c06\u8be5<strong>\u63d0\u6848<\/strong>\u53d1\u9001\u7ed9<strong>\u534a\u6570\u4ee5\u4e0a<\/strong>\u7684Acceptor\u96c6\u5408\uff0c\u5e76\u671f\u671b\u8fd9\u4e9bAcceptor\u80fd\u63a5\u53d7\u8be5\u63d0\u6848\u3002\u6211\u4eec\u79f0\u8be5\u8bf7\u6c42\u4e3a<strong>Accept\u8bf7\u6c42<\/strong>\u3002\uff08\u6ce8\u610f\uff1a\u6b64\u65f6\u63a5\u53d7Accept\u8bf7\u6c42\u7684Acceptor\u96c6\u5408<strong>\u4e0d\u4e00\u5b9a<\/strong>\u662f\u4e4b\u524d\u54cd\u5e94Prepare\u8bf7\u6c42\u7684Acceptor\u96c6\u5408\uff09<\/li>\n<\/ol>\n<h3 id=\"acceptor\u63a5\u53d7\u63d0\u6848\">Acceptor\u63a5\u53d7\u63d0\u6848<\/h3>\n<p>Acceptor<strong>\u53ef\u4ee5\u5ffd\u7565\u4efb\u4f55\u8bf7\u6c42<\/strong>\uff08\u5305\u62ecPrepare\u8bf7\u6c42\u548cAccept\u8bf7\u6c42\uff09\u800c\u4e0d\u7528\u62c5\u5fc3\u7834\u574f\u7b97\u6cd5\u7684<strong>\u5b89\u5168\u6027<\/strong>\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8fd9\u91cc\u8981\u8ba8\u8bba\u7684\u662f\u4ec0\u4e48\u65f6\u5019Acceptor\u53ef\u4ee5\u54cd\u5e94\u4e00\u4e2a\u8bf7\u6c42\u3002<\/p>\n<p>\u6211\u4eec\u5bf9Acceptor\u63a5\u53d7\u63d0\u6848\u7ed9\u51fa\u5982\u4e0b\u7ea6\u675f\uff1a<\/p>\n<blockquote><p>P1a\uff1a\u4e00\u4e2aAcceptor\u53ea\u8981\u5c1a<strong>\u672a\u54cd\u5e94\u8fc7<\/strong>\u4efb\u4f55<strong>\u7f16\u53f7\u5927\u4e8eN<\/strong>\u7684<strong>Prepare\u8bf7\u6c42<\/strong>\uff0c\u90a3\u4e48\u4ed6\u5c31\u53ef\u4ee5<strong>\u63a5\u53d7<\/strong>\u8fd9\u4e2a<strong>\u7f16\u53f7\u4e3aN\u7684\u63d0\u6848<\/strong>\u3002<\/p><\/blockquote>\n<p>\u5982\u679cAcceptor\u6536\u5230\u4e00\u4e2a\u7f16\u53f7\u4e3aN\u7684Prepare\u8bf7\u6c42\uff0c\u5728\u6b64\u4e4b\u524d\u5b83\u5df2\u7ecf\u54cd\u5e94\u8fc7\u7f16\u53f7\u5927\u4e8eN\u7684Prepare\u8bf7\u6c42\u3002\u6839\u636eP1a\uff0c\u8be5Acceptor\u4e0d\u53ef\u80fd\u63a5\u53d7\u7f16\u53f7\u4e3aN\u7684\u63d0\u6848\u3002\u56e0\u6b64\uff0c\u8be5Acceptor\u53ef\u4ee5\u5ffd\u7565\u7f16\u53f7\u4e3aN\u7684Prepare\u8bf7\u6c42\u3002\u5f53\u7136\uff0c\u4e5f\u53ef\u4ee5\u56de\u590d\u4e00\u4e2aerror\uff0c\u8ba9Proposer\u5c3d\u65e9\u77e5\u9053\u81ea\u5df1\u7684\u63d0\u6848\u4e0d\u4f1a\u88ab\u63a5\u53d7\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u4e00\u4e2aAcceptor<strong>\u53ea\u9700\u8bb0\u4f4f<\/strong>\uff1a1. \u5df2\u63a5\u53d7\u7684\u7f16\u53f7\u6700\u5927\u7684\u63d0\u6848 2. \u5df2\u54cd\u5e94\u7684\u8bf7\u6c42\u7684\u6700\u5927\u7f16\u53f7\u3002<\/p>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/07-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1398 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/07-1-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/07-1-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/07-1-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/07-1-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/07-1.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<h3 id=\"paxos\u7b97\u6cd5\u63cf\u8ff0\">Paxos\u7b97\u6cd5\u63cf\u8ff0<\/h3>\n<p>\u7ecf\u8fc7\u4e0a\u9762\u7684\u63a8\u5bfc\uff0c\u6211\u4eec\u603b\u7ed3\u4e0bPaxos\u7b97\u6cd5\u7684\u6d41\u7a0b\u3002<\/p>\n<p>Paxos\u7b97\u6cd5\u5206\u4e3a<strong>\u4e24\u4e2a\u9636\u6bb5<\/strong>\u3002\u5177\u4f53\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>\u9636\u6bb5\u4e00\uff1a<\/strong><\/li>\n<\/ul>\n<p>(a) Proposer\u9009\u62e9\u4e00\u4e2a<strong>\u63d0\u6848\u7f16\u53f7N<\/strong>\uff0c\u7136\u540e\u5411<strong>\u534a\u6570\u4ee5\u4e0a<\/strong>\u7684Acceptor\u53d1\u9001\u7f16\u53f7\u4e3aN\u7684<strong>Prepare\u8bf7\u6c42<\/strong>\u3002<\/p>\n<p>(b) \u5982\u679c\u4e00\u4e2aAcceptor\u6536\u5230\u4e00\u4e2a\u7f16\u53f7\u4e3aN\u7684Prepare\u8bf7\u6c42\uff0c\u4e14N<strong>\u5927\u4e8e<\/strong>\u8be5Acceptor\u5df2\u7ecf<strong>\u54cd\u5e94\u8fc7\u7684<\/strong>\u6240\u6709<strong>Prepare\u8bf7\u6c42<\/strong>\u7684\u7f16\u53f7\uff0c\u90a3\u4e48\u5b83\u5c31\u4f1a\u5c06\u5b83\u5df2\u7ecf<strong>\u63a5\u53d7\u8fc7\u7684\u7f16\u53f7\u6700\u5927\u7684\u63d0\u6848\uff08\u5982\u679c\u6709\u7684\u8bdd\uff09<\/strong>\u4f5c\u4e3a\u54cd\u5e94\u53cd\u9988\u7ed9Proposer\uff0c\u540c\u65f6\u8be5Acceptor\u627f\u8bfa<strong>\u4e0d\u518d\u63a5\u53d7<\/strong>\u4efb\u4f55<strong>\u7f16\u53f7\u5c0f\u4e8eN\u7684\u63d0\u6848<\/strong>\u3002<\/p>\n<ul>\n<li><strong>\u9636\u6bb5\u4e8c\uff1a<\/strong><\/li>\n<\/ul>\n<p>(a) \u5982\u679cProposer\u6536\u5230<strong>\u534a\u6570\u4ee5\u4e0a<\/strong>Acceptor\u5bf9\u5176\u53d1\u51fa\u7684\u7f16\u53f7\u4e3aN\u7684Prepare\u8bf7\u6c42\u7684<strong>\u54cd\u5e94<\/strong>\uff0c\u90a3\u4e48\u5b83\u5c31\u4f1a\u53d1\u9001\u4e00\u4e2a\u9488\u5bf9<strong>[N,V]\u63d0\u6848<\/strong>\u7684<strong>Accept\u8bf7\u6c42<\/strong>\u7ed9<strong>\u534a\u6570\u4ee5\u4e0a<\/strong>\u7684Acceptor\u3002\u6ce8\u610f\uff1aV\u5c31\u662f\u6536\u5230\u7684<strong>\u54cd\u5e94<\/strong>\u4e2d<strong>\u7f16\u53f7\u6700\u5927\u7684\u63d0\u6848\u7684value<\/strong>\uff0c\u5982\u679c\u54cd\u5e94\u4e2d<strong>\u4e0d\u5305\u542b\u4efb\u4f55\u63d0\u6848<\/strong>\uff0c\u90a3\u4e48V\u5c31\u7531Proposer<strong>\u81ea\u5df1\u51b3\u5b9a<\/strong>\u3002<\/p>\n<p>(b) \u5982\u679cAcceptor\u6536\u5230\u4e00\u4e2a\u9488\u5bf9\u7f16\u53f7\u4e3aN\u7684\u63d0\u6848\u7684Accept\u8bf7\u6c42\uff0c\u53ea\u8981\u8be5Acceptor<strong>\u6ca1\u6709<\/strong>\u5bf9\u7f16\u53f7<strong>\u5927\u4e8eN<\/strong>\u7684<strong>Prepare\u8bf7\u6c42<\/strong>\u505a\u51fa\u8fc7<strong>\u54cd\u5e94<\/strong>\uff0c\u5b83\u5c31<strong>\u63a5\u53d7\u8be5\u63d0\u6848<\/strong>\u3002<\/p>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/08.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1399 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/08-1024x576.jpg\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/08-1024x576.jpg 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/08-300x169.jpg 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/08-768x432.jpg 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/08.jpg 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<h2 id=\"learner\u5b66\u4e60\u88ab\u9009\u5b9a\u7684value\">Learner\u5b66\u4e60\u88ab\u9009\u5b9a\u7684value<\/h2>\n<p>Learner\u5b66\u4e60\uff08\u83b7\u53d6\uff09\u88ab\u9009\u5b9a\u7684value\u6709\u5982\u4e0b\u4e09\u79cd\u65b9\u6848\uff1a<\/p>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/09-1.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1400 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/09-1-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/09-1-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/09-1-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/09-1-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/09-1.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<h2 id=\"\u5982\u4f55\u4fdd\u8bc1paxos\u7b97\u6cd5\u7684\u6d3b\u6027\">\u5982\u4f55\u4fdd\u8bc1Paxos\u7b97\u6cd5\u7684\u6d3b\u6027<\/h2>\n<p><a href=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/10-2.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1401 size-large\" src=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/10-2-1024x576.png\" alt=\"\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/10-2-1024x576.png 1024w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/10-2-300x169.png 300w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/10-2-768x432.png 768w, https:\/\/www.xiaobo.li\/notes\/wp-content\/uploads\/2018\/07\/10-2.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>\u901a\u8fc7\u9009\u53d6<strong>\u4e3bProposer<\/strong>\uff0c\u5c31\u53ef\u4ee5\u4fdd\u8bc1Paxos\u7b97\u6cd5\u7684\u6d3b\u6027\u3002\u81f3\u6b64\uff0c\u6211\u4eec\u5f97\u5230\u4e00\u4e2a<strong>\u65e2\u80fd\u4fdd\u8bc1\u5b89\u5168\u6027\uff0c\u53c8\u80fd\u4fdd\u8bc1\u6d3b\u6027<\/strong>\u7684<strong>\u5206\u5e03\u5f0f\u4e00\u81f4\u6027\u7b97\u6cd5<\/strong>\u2014\u2014<strong>Paxos\u7b97\u6cd5<\/strong>\u3002<\/p>\n<h2 id=\"\u53c2\u8003\u8d44\u6599\">\u53c2\u8003\u8d44\u6599<\/h2>\n<ul>\n<li>\u8bba\u6587\u300aPaxos Made Simple\u300b<\/li>\n<li>\u8bba\u6587\u300aThe Part-Time Parliament\u300b<\/li>\n<li>\u82f1\u6587\u7248\u7ef4\u57fa\u767e\u79d1\u7684Paxos<\/li>\n<li>\u4e2d\u6587\u7248\u7ef4\u57fa\u767e\u79d1\u7684Paxos<\/li>\n<li>\u4e66\u7c4d\u300a\u4ecePaxos\u5230ZooKeeper\u300b<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>\u539f\u6587\uff1a<\/p>\n<p>https:\/\/www.cnblogs.com\/linbingdong\/p\/6253479.html<\/p>\n<p>&nbsp;<\/p>\n<p>... END ...<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Paxos\u7b97\u6cd5\u5728\u5206\u5e03\u5f0f\u9886\u57df\u5177\u6709\u975e\u5e38\u91cd\u8981\u7684\u5730\u4f4d\u3002\u4f46\u662fPaxos\u7b97\u6cd5\u6709\u4e24\u4e2a\u6bd4\u8f83\u660e\u663e\u7684 &hellip; <a href=\"https:\/\/www.xiaobo.li\/notes\/archives\/1391\">\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":[],"class_list":["post-1391","post","type-post","status-publish","format-standard","hentry","category-consensus"],"_links":{"self":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/1391","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=1391"}],"version-history":[{"count":0,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/1391\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/media?parent=1391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/categories?post=1391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/tags?post=1391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}