{"id":3257,"date":"2022-06-05T12:22:04","date_gmt":"2022-06-05T04:22:04","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=3257"},"modified":"2022-06-05T12:22:04","modified_gmt":"2022-06-05T04:22:04","slug":"paxos%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=3257","title":{"rendered":"paxos\u57fa\u672c\u6982\u5ff5"},"content":{"rendered":"\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/31780743\">Paxos\u7b97\u6cd5\u8be6\u89e3 &#8211; \u77e5\u4e4e (zhihu.com)<\/a><\/p>\n\n\n\n<p>Paxos\u5c06\u7cfb\u7edf\u4e2d\u7684\u89d2\u8272\u5206\u4e3a\u63d0\u8bae\u8005 (Proposer)\uff0c\u51b3\u7b56\u8005 (Acceptor)\uff0c\u548c\u6700\u7ec8\u51b3\u7b56\u5b66\u4e60\u8005 (Learner):<\/p>\n\n\n\n<ul><li><strong>Proposer<\/strong>: \u63d0\u51fa\u63d0\u6848 (Proposal)\u3002Proposal\u4fe1\u606f\u5305\u62ec\u63d0\u6848\u7f16\u53f7 (Proposal ID) \u548c\u63d0\u8bae\u7684\u503c (Value)\u3002<\/li><li><strong>Acceptor<\/strong>\uff1a\u53c2\u4e0e\u51b3\u7b56\uff0c\u56de\u5e94Proposers\u7684\u63d0\u6848\u3002\u6536\u5230Proposal\u540e\u53ef\u4ee5\u63a5\u53d7\u63d0\u6848\uff0c\u82e5Proposal\u83b7\u5f97\u591a\u6570Acceptors\u7684\u63a5\u53d7\uff0c\u5219\u79f0\u8be5Proposal\u88ab\u6279\u51c6\u3002<\/li><li><strong>Learner<\/strong>\uff1a\u4e0d\u53c2\u4e0e\u51b3\u7b56\uff0c\u4eceProposers\/Acceptors\u5b66\u4e60\u6700\u65b0\u8fbe\u6210\u4e00\u81f4\u7684\u63d0\u6848\uff08Value\uff09\u3002<\/li><\/ul>\n\n\n\n<p>\u5728\u591a\u526f\u672c\u72b6\u6001\u673a\u4e2d\uff0c\u6bcf\u4e2a\u526f\u672c\u540c\u65f6\u5177\u6709Proposer\u3001Acceptor\u3001Learner\u4e09\u79cd\u89d2\u8272\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic1.zhimg.com\/80\/v2-2c0d971fcca713a8e045a93d7881aedc_720w.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Paxos\u7b97\u6cd5\u901a\u8fc7\u4e00\u4e2a\u51b3\u8bae\u5206\u4e3a\u4e24\u4e2a\u9636\u6bb5\uff08Learn\u9636\u6bb5\u4e4b\u524d\u51b3\u8bae\u5df2\u7ecf\u5f62\u6210\uff09\uff1a<\/p>\n\n\n\n<ol><li>\u7b2c\u4e00\u9636\u6bb5\uff1aPrepare\u9636\u6bb5\u3002Proposer\u5411Acceptors\u53d1\u51faPrepare\u8bf7\u6c42\uff0cAcceptors\u9488\u5bf9\u6536\u5230\u7684Prepare\u8bf7\u6c42\u8fdb\u884cPromise\u627f\u8bfa\u3002<\/li><li>\u7b2c\u4e8c\u9636\u6bb5\uff1aAccept\u9636\u6bb5\u3002Proposer\u6536\u5230\u591a\u6570Acceptors\u627f\u8bfa\u7684Promise\u540e\uff0c\u5411Acceptors\u53d1\u51faPropose\u8bf7\u6c42\uff0cAcceptors\u9488\u5bf9\u6536\u5230\u7684Propose\u8bf7\u6c42\u8fdb\u884cAccept\u5904\u7406\u3002<\/li><li>\u7b2c\u4e09\u9636\u6bb5\uff1aLearn\u9636\u6bb5\u3002Proposer\u5728\u6536\u5230\u591a\u6570Acceptors\u7684Accept\u4e4b\u540e\uff0c\u6807\u5fd7\u7740\u672c\u6b21Accept\u6210\u529f\uff0c\u51b3\u8bae\u5f62\u6210\uff0c\u5c06\u5f62\u6210\u7684\u51b3\u8bae\u53d1\u9001\u7ed9\u6240\u6709Learners\u3002<\/li><\/ol>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Paxos\u7b97\u6cd5\u6d41\u7a0b\u4e2d\u7684\u6bcf\u6761\u6d88\u606f\u63cf\u8ff0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul><li><strong>Prepare<\/strong>: Proposer\u751f\u6210\u5168\u5c40\u552f\u4e00\u4e14\u9012\u589e\u7684Proposal ID (\u53ef\u4f7f\u7528\u65f6\u95f4\u6233\u52a0Server ID)\uff0c\u5411\u6240\u6709Acceptors\u53d1\u9001Prepare\u8bf7\u6c42\uff0c\u8fd9\u91cc\u65e0\u9700\u643a\u5e26\u63d0\u6848\u5185\u5bb9\uff0c\u53ea\u643a\u5e26Proposal ID\u5373\u53ef\u3002<\/li><li><strong>Promise<\/strong>: Acceptors\u6536\u5230Prepare\u8bf7\u6c42\u540e\uff0c\u505a\u51fa\u201c\u4e24\u4e2a\u627f\u8bfa\uff0c\u4e00\u4e2a\u5e94\u7b54\u201d\u3002<\/li><\/ul>\n\n\n\n<p>\u4e24\u4e2a\u627f\u8bfa\uff1a<\/p>\n\n\n\n<p>1. \u4e0d\u518d\u63a5\u53d7Proposal ID\u5c0f\u4e8e\u7b49\u4e8e\uff08\u6ce8\u610f\uff1a\u8fd9\u91cc\u662f&lt;= \uff09\u5f53\u524d\u8bf7\u6c42\u7684Prepare\u8bf7\u6c42\u3002<\/p>\n\n\n\n<p>2. \u4e0d\u518d\u63a5\u53d7Proposal ID\u5c0f\u4e8e\uff08\u6ce8\u610f\uff1a\u8fd9\u91cc\u662f&lt; \uff09\u5f53\u524d\u8bf7\u6c42\u7684Propose\u8bf7\u6c42\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u5e94\u7b54\uff1a<\/p>\n\n\n\n<p>\u4e0d\u8fdd\u80cc\u4ee5\u524d\u4f5c\u51fa\u7684\u627f\u8bfa\u4e0b\uff0c\u56de\u590d\u5df2\u7ecfAccept\u8fc7\u7684\u63d0\u6848\u4e2dProposal ID\u6700\u5927\u7684\u90a3\u4e2a\u63d0\u6848\u7684Value\u548cProposal ID\uff0c\u6ca1\u6709\u5219\u8fd4\u56de\u7a7a\u503c\u3002<\/p>\n\n\n\n<ul><li><strong>Propose<\/strong>: Proposer \u6536\u5230\u591a\u6570Acceptors\u7684Promise\u5e94\u7b54\u540e\uff0c\u4ece\u5e94\u7b54\u4e2d\u9009\u62e9Proposal ID\u6700\u5927\u7684\u63d0\u6848\u7684Value\uff0c\u4f5c\u4e3a\u672c\u6b21\u8981\u53d1\u8d77\u7684\u63d0\u6848\u3002\u5982\u679c\u6240\u6709\u5e94\u7b54\u7684\u63d0\u6848Value\u5747\u4e3a\u7a7a\u503c\uff0c\u5219\u53ef\u4ee5\u81ea\u5df1\u968f\u610f\u51b3\u5b9a\u63d0\u6848Value\u3002\u7136\u540e\u643a\u5e26\u5f53\u524dProposal ID\uff0c\u5411\u6240\u6709Acceptors\u53d1\u9001Propose\u8bf7\u6c42\u3002<\/li><li><strong>Accept<\/strong>: Acceptor\u6536\u5230Propose\u8bf7\u6c42\u540e\uff0c\u5728\u4e0d\u8fdd\u80cc\u81ea\u5df1\u4e4b\u524d\u4f5c\u51fa\u7684\u627f\u8bfa\u4e0b\uff0c\u63a5\u53d7\u5e76\u6301\u4e45\u5316\u5f53\u524dProposal ID\u548c\u63d0\u6848Value\u3002<\/li><li><strong>Learn<\/strong>: Proposer\u6536\u5230\u591a\u6570Acceptors\u7684Accept\u540e\uff0c\u51b3\u8bae\u5f62\u6210\uff0c\u5c06\u5f62\u6210\u7684\u51b3\u8bae\u53d1\u9001\u7ed9\u6240\u6709Learners\u3002<\/li><\/ul>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/pic2.zhimg.com\/80\/v2-8d4eaf5fdeb145e8bdf5e3bb1af408c9_720w.jpg\" alt=\"\"\/><figcaption>\u4f2a\u4ee3\u7801\u63cf\u8ff0<\/figcaption><\/figure>\n\n\n\n<ol><li>\u83b7\u53d6\u4e00\u4e2aProposal ID n\uff0c\u4e3a\u4e86\u4fdd\u8bc1Proposal ID\u552f\u4e00\uff0c\u53ef\u91c7\u7528\u65f6\u95f4\u6233+Server ID\u751f\u6210\uff1b<\/li><li>Proposer\u5411\u6240\u6709Acceptors\u5e7f\u64adPrepare(n)\u8bf7\u6c42\uff1b<\/li><li>Acceptor\u6bd4\u8f83n\u548cminProposal\uff0c\u5982\u679cn&gt;minProposal\uff0cminProposal=n\uff0c\u5e76\u4e14\u5c06 acceptedProposal \u548c acceptedValue \u8fd4\u56de\uff1b<\/li><li>Proposer\u63a5\u6536\u5230\u8fc7\u534a\u6570\u56de\u590d\u540e\uff0c\u5982\u679c\u53d1\u73b0\u6709acceptedValue\u8fd4\u56de\uff0c\u5c06\u6240\u6709\u56de\u590d\u4e2dacceptedProposal\u6700\u5927\u7684acceptedValue\u4f5c\u4e3a\u672c\u6b21\u63d0\u6848\u7684value\uff0c\u5426\u5219\u53ef\u4ee5\u4efb\u610f\u51b3\u5b9a\u672c\u6b21\u63d0\u6848\u7684value\uff1b<\/li><li>\u5230\u8fd9\u91cc\u53ef\u4ee5\u8fdb\u5165\u7b2c\u4e8c\u9636\u6bb5\uff0c\u5e7f\u64adAccept (n,value) \u5230\u6240\u6709\u8282\u70b9\uff1b<\/li><li>Acceptor\u6bd4\u8f83n\u548cminProposal\uff0c\u5982\u679cn&gt;=minProposal\uff0c\u5219acceptedProposal=minProposal=n\uff0cacceptedValue=value\uff0c\u672c\u5730\u6301\u4e45\u5316\u540e\uff0c\u8fd4\u56de\uff1b\u5426\u5219\uff0c\u8fd4\u56deminProposal\u3002<\/li><li>\u63d0\u8bae\u8005\u63a5\u6536\u5230\u8fc7\u534a\u6570\u8bf7\u6c42\u540e\uff0c\u5982\u679c\u53d1\u73b0\u6709\u8fd4\u56de\u503cresult &gt;n\uff0c\u8868\u793a\u6709\u66f4\u65b0\u7684\u63d0\u8bae\uff0c\u8df3\u8f6c\u52301\uff1b\u5426\u5219value\u8fbe\u6210\u4e00\u81f4\u3002<\/li><\/ol>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Paxos\u7b97\u6cd5\u8be6\u89e3 &#8211; \u77e5\u4e4e (zhihu.com) Paxos\u5c06\u7cfb\u7edf\u4e2d\u7684\u89d2\u8272\u5206\u4e3a\u63d0\u8bae\u8005 (Pro [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3257"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3257"}],"version-history":[{"count":11,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3257\/revisions"}],"predecessor-version":[{"id":3268,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/3257\/revisions\/3268"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}