{"id":847,"date":"2018-07-20T08:46:50","date_gmt":"2018-07-20T00:46:50","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=847"},"modified":"2018-07-20T08:46:50","modified_gmt":"2018-07-20T00:46:50","slug":"%e3%80%90%e5%88%86%e5%b8%83%e5%bc%8f%e3%80%91%e4%b8%80%e8%87%b4%e6%80%a7%e5%8d%8f%e8%ae%ae","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=847","title":{"rendered":"\u3010\u5206\u5e03\u5f0f\u3011\u4e00\u81f4\u6027\u534f\u8bae"},"content":{"rendered":"<p><strong>\u4e00\u3001\u524d\u8a00<\/strong><\/p>\n<p>\u7ee7\u7eed\u524d\u9762\u7684\u5b66\u4e60\uff0c\u8fd9\u7bc7\u6211\u4eec\u6765\u5b66\u4e60\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u6700\u91cd\u8981\u7684\u4e00\u5757\uff0c\u4e00\u81f4\u6027\u534f\u8bae\uff0c\u5176\u4e2d\u5c31\u5305\u62ec\u4e86\u5927\u540d\u9f0e\u9f0e\u7684Paxos\u7b97\u6cd5\u3002<\/p>\n<p><strong>\u4e8c\u30012PC\u4e0e3PC<\/strong><\/p>\n<p>\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e00\u4e2a\u673a\u5668\u8282\u70b9\u867d\u7136\u80fd\u591f\u660e\u786e\u77e5\u9053\u81ea\u5df1\u5728\u8fdb\u884c\u4e8b\u52a1\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\u7684\u7ed3\u679c\u662f\u6210\u529f\u6216\u662f\u5931\u8d25\uff0c\u4f46\u662f\u5374\u65e0\u6cd5\u76f4\u63a5\u83b7\u53d6\u5230\u5176\u4ed6\u5206\u5e03\u5f0f\u8282\u70b9\u7684\u64cd\u4f5c\u7ed3\u679c\uff0c\u56e0\u6b64\uff0c\u5f53\u4e00\u4e2a\u4e8b\u52a1\u64cd\u4f5c\u9700\u8981\u8de8\u8d8a\u591a\u4e2a\u5206\u5e03\u5f0f\u8282\u70b9\u7684\u65f6\u5019\uff0c\u4e3a\u4e86\u4fdd\u6301\u4e8b\u52a1\u5904\u7406\u7684ACID\u7684\u7279\u6027\uff0c\u9700\u8981\u5f15\u5165\u534f\u8c03\u8005\u7684\u7ec4\u4ef6\u6765\u7edf\u4e00\u8c03\u5ea6\u6240\u6709\u5206\u5e03\u5f0f\u8282\u70b9\u7684\u6267\u884c\u903b\u8f91\uff0c\u800c\u88ab\u8c03\u5ea6\u7684\u8282\u70b9\u5219\u88ab\u79f0\u4e3a\u53c2\u4e0e\u8005\uff0c\u534f\u8c03\u8005\u8d1f\u8d23\u8c03\u5ea6\u53c2\u4e0e\u8005\u7684\u884c\u4e3a\u5e76\u6700\u7ec8\u51b3\u5b9a\u8fd9\u4e9b\u53c2\u4e0e\u8005\u662f\u5426\u8981\u628a\u4e8b\u52a1\u771f\u6b63\u8fdb\u884c\u63d0\u4ea4\uff0c\u57fa\u4e8e\u8fd9\u4e2a\u601d\u60f3\uff0c\u884d\u751f\u51fa\u4e86\u4e8c\u9636\u6bb5\u63d0\u4ea4\u548c\u4e09\u9636\u6bb5\u63d0\u4ea4\u4e24\u79cd\u534f\u8bae\u3002<\/p>\n<p>2.1 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\u5404\u53c2\u4e0e\u8005\u5411\u534f\u8c03\u8005\u53cd\u9988\u4e8b\u52a1\u8be2\u95ee\u7684\u54cd\u5e94\uff0c\u5982\u679c\u53c2\u4e0e\u8005\u6210\u529f\u6267\u884c\u4e86\u4e8b\u52a1\u64cd\u4f5c\uff0c\u90a3\u4e48\u5c31\u53cd\u9988\u7ed9\u534f\u8c03\u8005Yes\u54cd\u5e94\uff0c\u8868\u793a\u4e8b\u52a1\u53ef\u4ee5\u6267\u884c\uff1b\u5982\u679c\u53c2\u4e0e\u8005\u6ca1\u6709\u6210\u529f\u6267\u884c\u4e8b\u52a1\uff0c\u90a3\u4e48\u5c31\u53cd\u9988\u7ed9\u534f\u8c03\u8005No\u54cd\u5e94\uff0c\u8868\u793a\u4e8b\u52a1\u4e0d\u53ef\u4ee5\u6267\u884c\u3002<\/p>\n<p>\u7b2c\u4e00\u9636\u6bb5\u8fd1\u4f3c\u4e8e\u662f\u534f\u8c03\u8005\u7ec4\u7ec7\u5404\u53c2\u4e0e\u8005\u5bf9\u4e00\u6b21\u4e8b\u52a1\u64cd\u4f5c\u7684\u6295\u7968\u8868\u6001\u7684\u8fc7\u7a0b\uff0c\u56e0\u6b64\u4e8c\u9636\u6bb5\u63d0\u4ea4\u534f\u8bae\u7684\u9636\u6bb5\u4e00\u4e5f\u88ab\u79f0\u4e3a\u6295\u7968\u9636\u6bb5\u3002<\/p>\n<p><strong>\u9636\u6bb5\u4e8c\uff1a\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4<\/strong><\/p>\n<p>\u534f\u8c03\u8005\u4f1a\u6839\u636e\u5404\u53c2\u4e0e\u8005\u7684\u53cd\u9988\u60c5\u51b5\u6765\u51b3\u5b9a\u6700\u7ec8\u662f\u5426\u53ef\u4ee5\u8fdb\u884c\u4e8b\u52a1\u63d0\u4ea4\u64cd\u4f5c\uff0c\u6b63\u5e38\u60c5\u51b5\u5305\u542b\u5982\u4e0b\u4e24\u79cd\u53ef\u80fd\uff1a<\/p>\n<p>1.\u00a0\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4\uff0c\u5047\u5982\u534f\u8c03\u8005\u4ece\u6240\u6709\u7684\u53c2\u4e0e\u8005\u83b7\u5f97\u7684\u53cd\u9988\u90fd\u662fYes\u54cd\u5e94\uff0c\u90a3\u4e48\u5c31\u4f1a\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4\u3002<\/p>\n<p>\u2460 \u53d1\u9001\u63d0\u4ea4\u8bf7\u6c42\uff0c\u534f\u8c03\u8005\u5411\u6240\u6709\u53c2\u4e0e\u8005\u8282\u70b9\u53d1\u51faCommit\u8bf7\u6c42\u3002<\/p>\n<p>\u2461 \u4e8b\u52a1\u63d0\u4ea4\uff0c\u53c2\u4e0e\u8005\u63a5\u6536\u5230Commit\u8bf7\u6c42\u540e\uff0c\u4f1a\u6b63\u5f0f\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4\u64cd\u4f5c\uff0c\u5e76\u5728\u5b8c\u6210\u63d0\u4ea4\u4e4b\u540e\u91ca\u653e\u5728\u6574\u4e2a\u4e8b\u52a1\u6267\u884c\u671f\u95f4\u5360\u7528\u7684\u4e8b\u52a1\u8d44\u6e90\u3002<\/p>\n<p>\u2462 \u53cd\u9988\u4e8b\u52a1\u63d0\u4ea4\u7ed3\u679c\uff0c\u53c2\u4e0e\u8005\u5728\u5b8c\u6210\u4e8b\u52a1\u63d0\u4ea4\u4e4b\u540e\uff0c\u5411\u534f\u8c03\u8005\u53d1\u9001Ack\u6d88\u606f\u3002<\/p>\n<p>\u2463 \u5b8c\u6210\u4e8b\u52a1\uff0c\u534f\u8c03\u8005\u63a5\u6536\u5230\u6240\u6709\u53c2\u4e0e\u8005\u53cd\u9988\u7684Ack\u6d88\u606f\u540e\uff0c\u5b8c\u6210\u4e8b\u52a1\u3002<\/p>\n<p>2.\u00a0\u4e2d\u65ad\u4e8b\u52a1\uff0c\u5047\u5982\u4efb\u610f\u4e00\u4e2a\u53c2\u4e0e\u8005\u5411\u534f\u8c03\u8005\u53cd\u9988\u4e86No\u54cd\u5e94\uff0c\u6216\u8005\u5728\u7b49\u5f85\u8d85\u65f6\u4e4b\u540e\uff0c\u534f\u8c03\u8005\u5c1a\u65e0\u6cd5\u63a5\u6536\u5230\u53c2\u4e0e\u8005\u7684\u53cd\u9988\u54cd\u5e94\uff0c\u5c31\u4f1a\u4e2d\u65ad\u4e8b\u52a1\u3002<\/p>\n<p>\u2460 \u53d1\u9001\u56de\u6eda\u8bf7\u6c42\uff0c\u534f\u8c03\u8005\u5411\u6240\u6709\u53c2\u4e0e\u8005\u8282\u70b9\u53d1\u51faRollback\u8bf7\u6c42\u3002<\/p>\n<p>\u2461 \u4e8b\u52a1\u56de\u6eda\uff0c\u53c2\u4e0e\u8005\u63a5\u6536\u5230Rollback\u8bf7\u6c42\u540e\uff0c\u4f1a\u5229\u7528\u5176\u5728\u9636\u6bb5\u4e00\u4e2d\u8bb0\u5f55\u7684Undo\u4fe1\u606f\u6765\u6267\u884c\u4e8b\u52a1\u56de\u6eda\uff0c\u5e76\u5728\u5b8c\u6210\u56de\u6eda\u4e4b\u540e\u91ca\u653e\u5728\u6574\u4e2a\u4e8b\u52a1\u6267\u884c\u671f\u95f4\u5360\u7528\u7684\u8d44\u6e90\u3002<\/p>\n<p>\u2462 \u53cd\u9988\u4e8b\u52a1\u56de\u6eda\u7ed3\u679c\uff0c\u53c2\u4e0e\u8005\u5728\u5b8c\u6210\u4e8b\u52a1\u56de\u6eda\u540e\uff0c\u5411\u534f\u8c03\u8005\u53d1\u9001Ack\u6d88\u606f\u3002<\/p>\n<p>\u2463 \u4e2d\u65ad\u4e8b\u52a1\uff0c\u534f\u8c03\u8005\u63a5\u6536\u6240\u6709\u53c2\u4e0e\u8005\u53cd\u9988\u7684Ack\u6d88\u606f\u540e\uff0c\u5b8c\u6210\u4e8b\u52a1\u4e2d\u65ad\u3002<\/p>\n<p>\u4e8c\u9636\u6bb5\u63d0\u4ea4\u534f\u8bae\u7684\u4f18\u70b9\uff1a\u539f\u7406\u7b80\u5355\uff0c\u5b9e\u73b0\u65b9\u4fbf\u3002\u7f3a\u70b9\uff1a\u540c\u6b65\u963b\u585e\uff0c\u5355\u70b9\u95ee\u9898\uff0c\u6570\u636e\u4e0d\u4e00\u81f4\uff0c\u592a\u8fc7\u4fdd\u5b88\u3002<\/p>\n<p><strong>\u540c\u6b65\u963b\u585e<\/strong>\uff1a\u5728\u4e8c\u9636\u6bb5\u63d0\u4ea4\u7684\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u6240\u6709\u53c2\u4e0e\u8be5\u4e8b\u52a1\u64cd\u4f5c\u7684\u903b\u8f91\u90fd\u5904\u4e8e\u963b\u585e\u72b6\u6001\uff0c\u5373\u5f53\u53c2\u4e0e\u8005\u5360\u6709\u516c\u5171\u8d44\u6e90\u65f6\uff0c\u5176\u4ed6\u8282\u70b9\u8bbf\u95ee\u516c\u5171\u8d44\u6e90\u4e0d\u5f97\u4e0d\u5904\u4e8e\u963b\u585e\u72b6\u6001\u3002<\/p>\n<p><strong>\u5355\u70b9\u95ee\u9898<\/strong>\uff1a\u82e5\u534f\u8c03\u5668\u51fa\u73b0\u95ee\u9898\uff0c\u90a3\u4e48\u6574\u4e2a\u4e8c\u9636\u6bb5\u63d0\u4ea4\u6d41\u7a0b\u5c06\u65e0\u6cd5\u8fd0\u8f6c\uff0c\u82e5\u534f\u8c03\u8005\u662f\u5728\u9636\u6bb5\u4e8c\u4e2d\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u90a3\u4e48\u5176\u4ed6\u53c2\u4e0e\u8005\u5c06\u4f1a\u4e00\u76f4\u5904\u4e8e\u9501\u5b9a\u4e8b\u52a1\u8d44\u6e90\u7684\u72b6\u6001\u4e2d\uff0c\u800c\u65e0\u6cd5\u7ee7\u7eed\u5b8c\u6210\u4e8b\u52a1\u64cd\u4f5c\u3002<\/p>\n<p><strong>\u6570\u636e\u4e0d\u4e00\u81f4<\/strong>\uff1a\u5728\u4e8c\u9636\u6bb5\u7684\u9636\u6bb5\u4e8c\uff0c\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4\u7684\u65f6\u5019\uff0c\u5f53\u534f\u8c03\u8005\u5411\u6240\u6709\u7684\u53c2\u4e0e\u8005\u53d1\u9001Commit\u8bf7\u6c42\u4e4b\u540e\uff0c\u53d1\u751f\u4e86\u5c40\u90e8\u7f51\u7edc\u5f02\u5e38\u6216\u8005\u662f\u534f\u8c03\u8005\u5728\u5c1a\u672a\u53d1\u9001\u5b8cCommit\u8bf7\u6c42\u4e4b\u524d\u81ea\u8eab\u53d1\u751f\u4e86\u5d29\u6e83\uff0c\u5bfc\u81f4\u6700\u7ec8\u53ea\u6709\u90e8\u5206\u53c2\u4e0e\u8005\u6536\u5230\u4e86Commit\u8bf7\u6c42\uff0c\u4e8e\u662f\u4f1a\u51fa\u73b0\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u73b0\u8c61\u3002<\/p>\n<p><strong>\u592a\u8fc7\u4fdd\u5b88<\/strong>\uff1a\u5728\u8fdb\u884c\u4e8b\u52a1\u63d0\u4ea4\u8be2\u95ee\u7684\u8fc7\u7a0b\u4e2d\uff0c\u53c2\u4e0e\u8005\u51fa\u73b0\u6545\u969c\u800c\u5bfc\u81f4\u534f\u8c03\u8005\u59cb\u7ec8\u65e0\u6cd5\u83b7\u53d6\u5230\u6240\u6709\u53c2\u4e0e\u8005\u7684\u54cd\u5e94\u4fe1\u606f\u7684\u8bdd\uff0c\u6b64\u65f6\u534f\u8c03\u8005\u53ea\u80fd\u4f9d\u9760\u81ea\u8eab\u7684\u8d85\u65f6\u673a\u5236\u6765\u5224\u65ad\u662f\u5426\u9700\u8981\u4e2d\u65ad\u4e8b\u52a1\uff0c\u8fd9\u6837\u7684\u7b56\u7565\u8fc7\u4e8e\u4fdd\u5b88\uff0c\u5373\u6ca1\u6709\u5b8c\u5584\u7684\u5bb9\u9519\u673a\u5236\uff0c\u4efb\u610f\u4e00\u4e2a\u7ed3\u70b9\u7684\u5931\u8d25\u90fd\u4f1a\u5bfc\u81f4\u6574\u4e2a\u4e8b\u52a1\u7684\u5931\u8d25\u3002<\/p>\n<p>2.2 3PC<\/p>\n<p>\u4e09\u9636\u6bb5\u63d0\u4ea4\uff0c\u5c06\u4e8c\u9636\u6bb5\u63d0\u4ea4\u534f\u8bae\u7684\u63d0\u4ea4\u4e8b\u52a1\u8bf7\u6c42\u8fc7\u7a0b\u5206\u4e3aCanCommit\u3001PreCommit\u3001doCommit\u4e09\u4e2a\u9636\u6bb5\u7ec4\u6210\u7684\u4e8b\u52a1\u5904\u7406\u534f\u8bae\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/616953\/201610\/616953-20161026193835781-416773789.png\" alt=\"\" \/><\/p>\n<p><strong>\u9636\u6bb5\u4e00\uff1acanCommit<\/strong><\/p>\n<p>\u2460 \u4e8b\u52a1\u8be2\u95ee\uff0c\u534f\u8c03\u8005\u5411\u6240\u6709\u7684\u53c2\u4e0e\u8005\u53d1\u9001\u4e00\u4e2a\u5305\u542b\u4e8b\u52a1\u5185\u5bb9\u7684canCommit\u8bf7\u6c42\uff0c\u8be2\u95ee\u662f\u5426\u53ef\u4ee5\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4\u64cd\u4f5c\uff0c\u5e76\u5f00\u59cb\u7b49\u5f85\u5404\u53c2\u4e0e\u8005\u7684\u54cd\u5e94\u3002<\/p>\n<p>\u2461 \u5404\u53c2\u4e0e\u8005\u5411\u534f\u8c03\u8005\u53cd\u9988\u4e8b\u52a1\u8be2\u95ee\u7684\u54cd\u5e94\uff0c\u53c2\u4e0e\u8005\u5728\u63a5\u6536\u5230\u6765\u81ea\u534f\u8c03\u8005\u7684canCommit\u8bf7\u6c42\u540e\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u81ea\u8eab\u8ba4\u4e3a\u53ef\u4ee5\u987a\u5229\u6267\u884c\u4e8b\u52a1\uff0c\u5219\u53cd\u9988Yes\u54cd\u5e94\uff0c\u5e76\u8fdb\u5165\u9884\u5907\u72b6\u6001\uff0c\u5426\u5219\u53cd\u9988No\u54cd\u5e94\u3002<\/p>\n<p><strong>\u9636\u6bb5\u4e8c\uff1apreCommit<\/strong><\/p>\n<p>\u8be5\u9636\u6bb5\u4f1a\u6839\u636e\u53cd\u9988\u60c5\u51b5\u51b3\u5b9a\u662f\u5426\u53ef\u4ee5\u8fdb\u884c\u4e8b\u52a1preCommit\u64cd\u4f5c\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u5305\u542b\u5982\u4e0b\u4e24\u79cd\u53ef\u80fd\uff1a<\/p>\n<p>\u6267\u884c\u4e8b\u52a1\u9884\u63d0\u4ea4\uff0c\u5047\u5982\u6240\u6709\u53c2\u4e0e\u53cd\u9988\u7684\u90fd\u662fYes\uff0c\u90a3\u4e48\u5c31\u4f1a\u6267\u884c\u4e8b\u52a1\u9884\u63d0\u4ea4\u3002<\/p>\n<p>\u2460 \u53d1\u9001\u9884\u63d0\u4ea4\u8bf7\u6c42\uff0c\u534f\u8c03\u8005\u5411\u6240\u6709\u53c2\u4e0e\u8005\u8282\u70b9\u53d1\u51fapreCommit\u8bf7\u6c42\uff0c\u5e76\u8fdb\u5165prepared\u9636\u6bb5\u3002<\/p>\n<p>\u2461 \u4e8b\u52a1\u9884\u63d0\u4ea4\uff0c\u53c2\u4e0e\u8005\u63a5\u6536\u5230preCommit\u8bf7\u6c42\u540e\uff0c\u4f1a\u6267\u884c\u4e8b\u52a1\u64cd\u4f5c\uff0c\u5e76\u5c06Undo\u548cRedo\u4fe1\u606f\u8bb0\u5f55\u5230\u4e8b\u52a1\u65e5\u5fd7\u4e2d\u3002<\/p>\n<p>\u2462 \u5404\u53c2\u4e0e\u8005\u5411\u534f\u8c03\u8005\u53cd\u9988\u4e8b\u52a1\u6267\u884c\u7684\u54cd\u5e94\uff0c\u82e5\u53c2\u4e0e\u8005\u6210\u529f\u6267\u884c\u4e86\u4e8b\u52a1\u64cd\u4f5c\uff0c\u90a3\u4e48\u53cd\u9988Ack\uff0c\u540c\u65f6\u7b49\u5f85\u6700\u7ec8\u7684\u6307\u4ee4\uff1a\u63d0\u4ea4\uff08commit\uff09\u6216\u7ec8\u6b62\uff08abort\uff09\u3002<\/p>\n<p>\u4e2d\u65ad\u4e8b\u52a1\uff0c\u82e5\u4efb\u4e00\u53c2\u4e0e\u53cd\u9988\u4e86No\u54cd\u5e94\uff0c\u6216\u8005\u5728\u7b49\u5f85\u8d85\u65f6\u540e\uff0c\u534f\u8c03\u8005\u5c1a\u65e0\u6cd5\u63a5\u6536\u5230\u6240\u6709\u53c2\u4e0e\u8005\u53cd\u9988\uff0c\u5219\u4e2d\u65ad\u4e8b\u52a1\u3002<\/p>\n<p>\u2460 \u53d1\u9001\u4e2d\u65ad\u8bf7\u6c42\uff0c\u534f\u8c03\u8005\u5411\u6240\u6709\u53c2\u4e0e\u8005\u53d1\u51faabort\u8bf7\u6c42\u3002<\/p>\n<p>\u2461 \u4e2d\u65ad\u4e8b\u52a1\uff0c\u65e0\u8bba\u662f\u6536\u5230\u6765\u81ea\u534f\u8c03\u8005\u7684abort\u8bf7\u6c42\u6216\u8005\u7b49\u5f85\u534f\u8c03\u8005\u8bf7\u6c42\u8fc7\u7a0b\u4e2d\u8d85\u65f6\uff0c\u53c2\u4e0e\u8005\u90fd\u4f1a\u4e2d\u65ad\u4e8b\u52a1\u3002<\/p>\n<p><strong>\u9636\u6bb5\u4e09\uff1adoCommit<\/strong><\/p>\n<p>\u8be5\u9636\u6bb5\u4f1a\u8fdb\u884c\u771f\u6b63\u7684\u4e8b\u52a1\u63d0\u4ea4\uff0c\u4e5f\u4f1a\u5b58\u5728\u5982\u4e0b\u60c5\u51b5\u3002<\/p>\n<p>1. \u6267\u884c\u63d0\u4ea4<\/p>\n<p>\u2460 \u53d1\u9001\u63d0\u4ea4\u8bf7\u6c42\uff0c\u8fdb\u5165\u8fd9\u4e00\u9636\u6bb5\uff0c\u82e5\u534f\u8c03\u8005\u5904\u4e8e\u6b63\u5e38\u5de5\u4f5c\u72b6\u6001\uff0c\u5e76\u4e14\u4ed6\u63a5\u6536\u5230\u4e86\u6765\u81ea\u6240\u6709\u53c2\u4e0e\u8005\u7684Ack\u54cd\u5e94\uff0c\u90a3\u4e48\u4ed6\u5c06\u4ece\u9884\u63d0\u4ea4\u72b6\u6001\u8f6c\u5316\u4e3a\u63d0\u4ea4\u72b6\u6001\uff0c\u5e76\u5411\u6240\u6709\u7684\u53c2\u4e0e\u8005\u53d1\u9001doCommit\u8bf7\u6c42\u3002<\/p>\n<p>\u2461 \u4e8b\u52a1\u63d0\u4ea4\uff0c\u53c2\u4e0e\u8005\u63a5\u6536\u5230doCommit\u8bf7\u6c42\u540e\uff0c\u4f1a\u6b63\u5f0f\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4\u64cd\u4f5c\uff0c\u5e76\u5728\u5b8c\u6210\u63d0\u4ea4\u4e4b\u540e\u91ca\u653e\u6574\u4e2a\u4e8b\u52a1\u6267\u884c\u8fc7\u7a0b\u4e2d\u5360\u7528\u7684\u4e8b\u52a1\u8d44\u6e90\u3002<\/p>\n<p>\u2462 \u53cd\u9988\u4e8b\u52a1\u63d0\u4ea4\u7ed3\u679c\uff0c\u53c2\u4e0e\u8005\u5728\u5b8c\u6210\u4e8b\u52a1\u63d0\u4ea4\u540e\uff0c\u5411\u534f\u8c03\u8005\u53d1\u9001Ack\u54cd\u5e94\u3002<\/p>\n<p>\u2463 \u5b8c\u6210\u4e8b\u52a1\uff0c\u534f\u8c03\u8005\u63a5\u6536\u5230\u6240\u6709\u53c2\u4e0e\u8005\u53cd\u9988\u7684Ack\u6d88\u606f\u540e\uff0c\u5b8c\u6210\u4e8b\u52a1\u3002<\/p>\n<p>2. \u4e2d\u65ad\u4e8b\u52a1<\/p>\n<p>\u2460 \u53d1\u9001\u4e2d\u65ad\u8bf7\u6c42\uff0c\u534f\u8c03\u8005\u5411\u6240\u6709\u7684\u53c2\u4e0e\u8005\u8282\u70b9\u53d1\u9001abort\u8bf7\u6c42\u3002<\/p>\n<p>\u2461 \u4e8b\u52a1\u56de\u6eda\uff0c\u53c2\u4e0e\u8005\u6536\u5230abort\u8bf7\u6c42\u540e\uff0c\u4f1a\u6839\u636e\u8bb0\u5f55\u7684Undo\u4fe1\u606f\u6765\u6267\u884c\u4e8b\u52a1\u56de\u6eda\uff0c\u5e76\u5728\u5b8c\u6210\u56de\u6eda\u4e4b\u540e\u91ca\u653e\u6574\u4e2a\u4e8b\u52a1\u6267\u884c\u671f\u95f4\u5360\u7528\u7684\u8d44\u6e90\u3002<\/p>\n<p>\u2462 \u53cd\u9988\u4e8b\u52a1\u56de\u6eda\u7ed3\u679c\uff0c\u53c2\u4e0e\u8005\u5728\u5b8c\u6210\u4e8b\u52a1\u56de\u6eda\u540e\uff0c\u5411\u534f\u8c03\u8005\u53d1\u9001Ack\u6d88\u606f\u3002<\/p>\n<p>\u2463 \u4e2d\u65ad\u4e8b\u52a1\uff0c\u534f\u8c03\u8005\u63a5\u6536\u5230\u6240\u6709\u53c2\u4e0e\u8005\u53cd\u9988\u7684Ack\u6d88\u606f\u540e\uff0c\u4e2d\u65ad\u4e8b\u52a1\u3002<\/p>\n<p>\u4e09\u9636\u6bb5\u63d0\u4ea4\u534f\u8bae\u964d\u4f4e\u4e86\u53c2\u4e0e\u8005\u7684\u963b\u585e\u8303\u56f4\uff0c\u80fd\u591f\u5728\u53d1\u751f\u5355\u70b9\u6545\u969c\u540e\u7ee7\u7eed\u8fbe\u6210\u4e00\u81f4\u3002\u4f46\u662f\u5176\u53ef\u80fd\u8fd8\u662f\u4f1a\u53d1\u751f\u6570\u636e\u4e0d\u4e00\u81f4\u95ee\u9898\u3002<\/p>\n<p><strong>\u4e09\u3001Paxos\u7b97\u6cd5<\/strong><\/p>\n<p>Paxos\u7b97\u6cd5\u662f\u4e00\u79cd\u57fa\u4e8e\u6d88\u606f\u4f20\u9012\u4e14\u5177\u6709\u9ad8\u5ea6\u5bb9\u9519\u7279\u6027\u7684\u4e00\u81f4\u6027\u7b97\u6cd5\uff0c\u5176\u9700\u8981\u89e3\u51b3\u7684\u95ee\u9898\u5c31\u662f\u5982\u4f55\u5728\u4e00\u4e2a\u53ef\u80fd\u53d1\u751f\u5f02\u5e38\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u5feb\u901f\u4e14\u6b63\u786e\u5730\u5728\u96c6\u7fa4\u5185\u90e8\u5bf9\u67d0\u4e2a\u6570\u636e\u7684\u503c\u8fbe\u6210\u4e00\u81f4\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>\u548c2PC\u7c7b\u4f3c\uff0cPaxos\u5148\u628a\u8282\u70b9\u5206\u6210\u4e24\u7c7b\uff0c\u53d1\u8d77\u63d0\u8bae(proposal)\u7684\u4e00\u65b9\u4e3aproposer\uff0c\u53c2\u4e0e\u51b3\u8bae\u7684\u4e00\u65b9\u4e3aacceptor\u3002<\/p>\n<p>\u5728\u6ca1\u6709\u5931\u8d25\u548c\u6d88\u606f\u4e22\u5931\u7684\u60c5\u51b5\u4e0b\uff0c\u5047\u5982\u53ea\u6709\u4e00\u4e2a\u63d0\u8bae\u88ab\u63d0\u51fa\u7684\u60c5\u51b5\uff0c\u5982\u4f55\u786e\u5b9a\u4e00\u4e2a\u63d0\u8bae\uff0c\u505a\u5230\u5982\u4e0b\u5c31\u53ef\u4ee5\u4fdd\u8bc1<\/p>\n<p><strong>P1:\u4e00\u4e2aacceptor\u5fc5\u987b\u63a5\u53d7\u5b83\u6536\u5230\u7684\u7b2c\u4e00\u4e2a\u63d0\u8bae\u3002<\/strong><\/p>\n<p>P1\u4f1a\u5f15\u5165\u4e00\u4e2a\u95ee\u9898\uff0c\u82e5\u679c\u591a\u4e2a\u63d0\u8bae\u88ab\u4e0d\u540c\u7684proposer\u540c\u65f6\u63d0\u51fa\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u867d\u7136\u6bcf\u4e2aacceptor\u90fd\u6279\u51c6\u4e86\u5b83\u6536\u5230\u7684\u7b2c\u4e00\u4e2a\u63d0\u8bae\uff0c\u4f46\u662f\u6ca1\u6709\u4e00\u4e2a\u63d0\u8bae\u662f\u7531\u591a\u6570acceptor\u90fd\u63a5\u53d7\u7684\uff0c\u56e0\u6b64\u65e0\u6cd5\u786e\u5b9a\u4e00\u4e2a\u63d0\u8bae\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/616953\/201610\/616953-20161026202212796-47122031.png\" alt=\"\" \/><\/p>\n<p>\u4e0a\u56fe\u65e0\u6cd5\u786e\u5b9a\u4e00\u4e2a\u63d0\u8bae\u3002\u5373\u4f7f\u53ea\u6709\u4e24\u4e2a\u63d0\u8bae\u88ab\u63d0\u51fa\uff0c\u5982\u679c\u6bcf\u4e2a\u63d0\u8bae\u90fd\u88ab\u5dee\u4e0d\u591a\u4e00\u534a\u7684acceptor\u6279\u51c6\u4e86\uff0c\u6b64\u65f6\u4e5f\u53ef\u80fd\u65e0\u6cd5\u786e\u5b9a\u54ea\u4e2a\u63d0\u8bae\uff0c\u5982\u4e0b\u56fe\u6240\u793a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/616953\/201610\/616953-20161026202831765-739081816.png\" alt=\"\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u82e5acceptor5\u51fa\u73b0\u6545\u969c\uff0c\u5219\u65e0\u6cd5\u786e\u5b9a\u54ea\u4e2a\u63d0\u8bae\u3002<\/p>\n<p>\u5728P1\u7684\u57fa\u7840\u4e0a\uff0c\u589e\u52a0\u5982\u4e0b\u6761\u4ef6\uff1a<\/p>\n<p><strong>\u3000\u3000a. proposer\u53d1\u8d77\u7684\u6bcf\u9879\u63d0\u8bae\u5206\u522b\u7528\u4e00\u4e2aID\u6807\u8bc6\uff0c\u63d0\u8bae\u7684\u7ec4\u6210\u56e0\u6b64\u53d8\u4e3a(ID, value)<\/strong><\/p>\n<p><strong>\u3000\u3000b.\u00a0\u82e5\u786e\u5b9a\u4e00\u4e2a\u63d0\u8bae\uff0c\u9700\u8981\u7531\u534a\u6570\u4ee5\u4e0a\u7684acceptor\u63a5\u53d7\uff0c\u5f53\u67d0\u4e2a\u63d0\u8bae\u88ab\u534a\u6570\u4ee5\u4e0a\u7684acceptor\u63a5\u53d7\u540e\uff0c\u6211\u4eec\u5c31\u8ba4\u4e3a\u8be5\u63d0\u8bae\u5c31\u88ab\u786e\u5b9a\u4e86\u3002<\/strong><\/p>\n<p>\u6211\u4eec\u7ea6\u5b9a\u540e\u9762\u53d1\u8d77\u7684\u63d0\u8bae\u7684ID\u6bd4\u524d\u9762\u63d0\u8bae\u7684ID\u5927\uff0c\u5e76\u5047\u8bbe\u53ef\u4ee5\u6709\u591a\u9879\u63d0\u8bae\u88ab\u786e\u5b9a\uff0c\u4e3a\u505a\u5230\u786e\u5b9a\u5e76\u53ea\u786e\u5b9a\u4e00\u4e2a\u503cacceptor\u8981\u505a\u5230\u4ee5\u4e0b\u8fd9\u70b9\uff1a<\/p>\n<p><strong>P2\uff1a\u5982\u679c\u4e00\u9879\u503c\u4e3av\u7684\u63d0\u8bae\u88ab\u786e\u5b9a\uff0c\u90a3\u4e48\u540e\u7eed\u53ea\u786e\u5b9a\u503c\u4e3av\u7684\u63d0\u8bae\u3002<\/strong><\/p>\n<p>\u7531\u4e8e\u4e00\u9879\u63d0\u8bae\u88ab\u786e\u5b9a(chosen)\u524d\u5fc5\u987b\u5148\u88ab\u591a\u6570\u6d3eacceptor\u63a5\u53d7(accepted)\uff0c\u4e3a\u5b9e\u73b0P2\uff0c\u5b9e\u8d28\u4e0aacceptor\u9700\u8981\u505a\u5230\uff1a<\/p>\n<p><strong>P2a\uff1a\u5982\u679c\u4e00\u9879\u503c\u4e3av\u7684\u63d0\u8bae\u88ab\u786e\u5b9a\uff0c\u90a3\u4e48acceptor\u540e\u7eed\u53ea\u63a5\u53d7\u503c\u4e3av\u7684\u63d0\u8bae\u3002<\/strong><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/616953\/201610\/616953-20161026204547015-1218968410.png\" alt=\"\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u5728acceptor1\u6ca1\u6709\u6536\u5230\u4efb\u4f55\u63d0\u8bae\u7684\u60c5\u51b5\u4e0b\uff0c\u5176\u4ed64\u4e2aacceptor\u5df2\u7ecf\u6279\u51c6\u4e86\u6765\u81eaproposer2\u7684\u63d0\u8bae[M0,V1]\uff0c\u800c\u6b64\u65f6\uff0cproposer1\u4ea7\u751f\u4e86\u4e00\u4e2a\u5177\u6709\u5176\u4ed6value\u503c\u7684\uff0c\u7f16\u53f7\u66f4\u9ad8\u7684\u63d0\u8bae[M1,V2]\uff0c\u5e76\u53d1\u9001\u7ed9\u4e86acceptor1\uff0c\u6839\u636eP1\uff0c\u5c31\u9700\u8981\u63a5\u53d7\u8be5\u63d0\u8bae\uff0c\u4f46\u662f\u8fd9\u4e0eP2a\u77db\u76fe\uff0c\u56e0\u6b64\u5982\u679c\u8981\u540c\u65f6\u6ee1\u8db3P1\u548cP2a\uff0c\u9700\u8981\u8fdb\u5165\u5982\u4e0b\u5f3a\u5316<\/p>\n<p><strong>P2b\uff1a\u5982\u679c\u4e00\u9879\u503c\u4e3av\u7684\u63d0\u8bae\u88ab\u786e\u5b9a\uff0c\u90a3\u4e48proposer\u540e\u7eed\u53ea\u53d1\u8d77\u503c\u4e3av\u7684\u63d0\u8bae\u3002<\/strong><\/p>\n<p>P2b\u7ea6\u675f\u7684\u662f\u63d0\u8bae\u88ab\u786e\u5b9a(chosen)\u540eproposer\u7684\u884c\u4e3a\uff0c\u6211\u4eec\u66f4\u5173\u5fc3\u63d0\u8bae\u88ab\u786e\u5b9a\u524dproposer\u5e94\u8be5\u600e\u4e48\u505a\u3002<\/p>\n<p><strong>\u3000\u3000P2c\uff1a\u5bf9\u4e8e\u63d0\u8bae(n,v)\uff0cacceptor\u7684\u591a\u6570\u6d3eS\u4e2d\uff0c\u5982\u679c\u5b58\u5728acceptor\u6700\u8fd1\u4e00\u6b21(\u5373ID\u503c\u6700\u5927)\u63a5\u53d7\u7684\u63d0\u8bae\u7684\u503c\u4e3av&#8217;\uff0c\u90a3\u4e48\u8981\u6c42v = v&#8217;\uff1b\u5426\u5219v\u53ef\u4e3a\u4efb\u610f\u503c\u3002<\/strong><\/p>\n<p>3.1 proposer\u751f\u6210\u63d0\u8bae<\/p>\n<p>\u5728proposer\u4ea7\u751f\u4e00\u4e2a\u7f16\u53f7\u4e3aMn\u7684\u63d0\u8bae\u65f6\uff0c\u5fc5\u987b\u8981\u77e5\u9053\u5f53\u524d\u67d0\u4e00\u4e2a\u5c06\u8981\u6216\u5df2\u7ecf\u88ab\u534a\u6570\u4ee5\u4e0aacceptor\u63a5\u53d7\u7684\u7f16\u53f7\u5c0f\u4e8eMn\u4f46\u4e3a\u6700\u5927\u7f16\u53f7\u7684\u63d0\u8bae\uff0c\u5e76\u4e14\uff0cproposer\u4f1a\u8981\u6c42\u6240\u6709\u7684acceptor\u90fd\u4e0d\u8981\u518d\u63a5\u53d7\u4efb\u4f55\u7f16\u53f7\u5c0f\u4e8eMn\u7684\u63d0\u8bae\uff0c\u8fd9\u4e5f\u5c31\u662f\u5982\u4e0b\u63d0\u8bae\u751f\u6210\u7b97\u6cd5\u3002<\/p>\n<p>1. proposer\u9009\u62e9\u4e00\u4e2a\u65b0\u7684\u63d0\u8bae\u7f16\u53f7\u4e3aMn\uff0c\u7136\u540e\u5411\u67d0\u4e2aacceptor\u96c6\u5408\u7684\u6210\u5458\u53d1\u9001\u8bf7\u6c42\uff0c\u8981\u6c42\u8be5\u96c6\u5408\u4e2d\u7684acceptor\u505a\u51fa\u5982\u4e0b\u56de\u5e94\u3002<\/p>\n<p>\u2460 \u5411proposer\u627f\u8bfa\uff0c\u4fdd\u8bc1\u4e0d\u518d\u63a5\u53d7\u4efb\u4f55\u7f16\u53f7\u5c0f\u4e8eMn\u7684\u63d0\u8bae\u3002<\/p>\n<p>\u2461 \u5982\u679cacceptor\u5df2\u7ecf\u63a5\u53d7\u8fc7\u4efb\u4f55\u63d0\u8bae\uff0c\u90a3\u4e48\u5176\u5c31\u5411proposer\u53cd\u9988\u5f53\u524d\u8be5acceptor\u5df2\u7ecf\u63a5\u53d7\u7684\u7f16\u53f7\u5c0f\u4e8eMn\u4f46\u4e3a\u6700\u5927\u7f16\u53f7\u7684\u90a3\u4e2a\u63d0\u8bae\u7684\u503c\u3002<\/p>\n<p>\u6211\u4eec\u5c06\u8bf7\u6c42\u79f0\u4e3a\u7f16\u53f7Mn\u7684\u63d0\u8bae\u7684Prepare\u8bf7\u6c42\u3002<\/p>\n<p>2. \u5982\u679cproposer\u6536\u5230\u4e86\u6765\u81ea\u534a\u6570\u4ee5\u4e0a\u7684acceptor\u7684\u54cd\u5e94\u7ed3\u679c\uff0c\u90a3\u4e48\u5b83\u5c31\u53ef\u4ee5\u4ea7\u751f\u7f16\u53f7\u4e3aMn\u3001Value\u503c\u4e3aVn\u7684\u63d0\u8bae\uff0c\u8fd9\u91cc\u7684Vn\u662f\u6240\u6709\u54cd\u5e94\u4e2d\u7f16\u53f7\u6700\u5927\u7684\u63d0\u8baeValue\u7684\u503c\uff0c\u5f53\u7136\uff0c\u5982\u679c\u534a\u6570\u4ee5\u4e0a\u7684acceptor\u90fd\u6ca1\u6709\u63a5\u53d7\u8fc7\u4efb\u4f55\u63d0\u8bae\uff0c\u5373\u54cd\u5e94\u4e2d\u4e0d\u5305\u542b\u4efb\u4f55\u63d0\u8bae\uff0c\u90a3\u4e48\u6b64\u65f6Vn\u503c\u5c31\u53ef\u4ee5\u7531proposer\u4efb\u610f\u9009\u62e9\u3002<\/p>\n<p>\u5728\u786e\u5b9a\u4e86proposer\u7684\u63d0\u8bae\u540e\uff0cproposer\u5c31\u4f1a\u5c06\u8be5\u63d0\u8bae\u518d\u6b21\u53d1\u9001\u7ed9\u67d0\u4e2aacceptor\u96c6\u5408\uff0c\u5e76\u671f\u671b\u83b7\u5f97\u5b83\u4eec\u7684\u63a5\u53d7\uff0c\u6b64\u8bf7\u6c42\u79f0\u4e3aaccept\u8bf7\u6c42\uff0c\u6b64\u65f6\u63a5\u53d7accept\u8bf7\u6c42\u7684acceptor\u96c6\u5408\u4e0d\u4e00\u5b9a\u662f\u4e4b\u524d\u54cd\u5e94prepare\u8bf7\u6c42\u7684acceptor\u96c6\u5408\u3002<\/p>\n<p>3.2 acceptor\u63a5\u53d7\u63d0\u8bae<\/p>\n<p>\u4e00\u4e2aacceptor\u53ef\u80fd\u4f1a\u6536\u5230\u6765\u81eaproposer\u7684\u4e24\u79cd\u8bf7\u6c42\uff0c\u5206\u522b\u662fprepare\u8bf7\u6c42\u548caccept\u8bf7\u6c42\uff0c\u5bf9\u8fd9\u4e24\u7c7b\u8bf7\u6c42\u4f5c\u51fa\u54cd\u5e94\u7684\u6761\u4ef6\u5206\u522b\u5982\u4e0b<\/p>\n<p>prepare\u8bf7\u6c42\uff1aacceptor\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u5019\u54cd\u5e94\u4e00\u4e2aprepare\u8bf7\u6c42\u3002<\/p>\n<p>accept\u8bf7\u6c42\uff1a\u5728\u4e0d\u8fdd\u80ccaccept\u73b0\u6709\u627f\u8bfa\u7684\u524d\u63d0\u4e0b\uff0c\u53ef\u4ee5\u4efb\u610f\u54cd\u5e94accept\u8bf7\u6c42\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5bf9acceptor\u903b\u8f91\u5904\u7406\u7684\u7ea6\u675f\u6761\u4ef6\uff0c\u5927\u4f53\u53ef\u4ee5\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n<p>P1a\uff1a\u4e00\u4e2aacceptor\u53ea\u8981\u5c1a\u672a\u54cd\u5e94\u8fc7\u4efb\u4f55\u7f16\u53f7\u5927\u4e8eMn\u7684prepare\u8bf7\u6c42\uff0c\u90a3\u4e48\u5b83\u5c31\u53ef\u4ee5\u63a5\u53d7\u8fd9\u4e2a\u7f16\u53f7\u4e3aMn\u7684\u63d0\u8bae\u3002<\/p>\n<p>3.3 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\u5c06\u4e3blearner\u8303\u56f4\u6269\u5927\u81f3\u4e00\u4e2a\u7279\u5b9a\u7684learner\u96c6\u5408\uff0c\u8be5\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2alearner\u90fd\u53ef\u4ee5\u5728\u4e00\u4e2a\u63d0\u8bae\u88ab\u9009\u5b9a\u540e\u901a\u77e5\u6240\u6709\u5176\u4ed6\u7684learner\uff0c\u96c6\u5408learner\u8d8a\u591a\uff0c\u8d8a\u53ef\u9760\uff0c\u4f46\u662f\u901a\u4fe1\u5f00\u9500\u8d8a\u5927\u3002<\/p>\n<p>3.5 \u9009\u53d6\u4e3bproposer\u4fdd\u8bc1\u7b97\u6cd5\u7684\u6d3b\u6027<\/p>\n<p>\u5047\u8bbe\u5b58\u5728\u5982\u4e0b\u7684\u6781\u7aef\u60c5\u51b5\uff0c\u6709\u4e24\u4e2aproposer\u4f9d\u6b21\u63d0\u51fa\u4e86\u4e00\u7cfb\u5217\u7f16\u53f7\u9012\u589e\u7684\u63d0\u8bae\uff0c\u4f46\u662f\u6700\u7ec8\u90fd\u65e0\u6cd5\u88ab\u786e\u5b9a\uff0c\u5177\u4f53\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<p>proposer1\u63d0\u51fa\u4e86\u7f16\u53f7\u4e3aM1\u7684\u63d0\u8bae\uff0c\u7136\u540e\u5b8c\u6210\u4e86\u4e0a\u8ff0\u7684\u7b2c\u4e00\u9636\u6bb5\uff0c\u4e0e\u6b64\u540c\u65f6\uff0cproposer2\u63d0\u51fa\u4e86\u7f16\u53f7\u4e3aM2\u7684\u63d0\u8bae\uff0c\u540c\u6837\u5b8c\u6210\u4e86\u7b2c\u4e00\u9636\u6bb5\uff0c\u4e8e\u662facceptor\u627f\u8bfa\u4e0d\u518d\u63a5\u53d7\u7f16\u53f7\u5c0f\u4e8eM2\u7684\u63d0\u8bae\uff0c\u56e0\u6b64\uff0c\u5f53proposer1\u8fdb\u5165\u9636\u6bb5\u4e8c\u65f6\uff0c\u5176\u53d1\u51fa\u7684accept\u8bf7\u6c42\u4f1a\u88abacceptor\u5ffd\u7565\uff0c\u4e8e\u662fproposer1\u53c8\u8fdb\u5165\u7b2c\u4e00\u9636\u6bb5\u5e76\u63d0\u51fa\u4e86\u7f16\u53f7\u4e3aM3\u7684\u63d0\u8bae\uff0c\u8fd9\u5bfc\u81f4proposer2\u7684accept\u8bf7\u6c42\u88ab\u5ffd\u7565\uff0c\u4e00\u6b21\u7c7b\u63a8\uff0c\u63d0\u8bae\u7684\u786e\u5b9a\u8fc7\u7a0b\u5c06\u9677\u5165\u6b7b\u5faa\u73af\u3002<\/p>\n<p>\u4e3a\u4e86\u4fdd\u8bc1Paxos\u7b97\u6cd5\u7684\u6d3b\u6027\uff0c\u5c31\u5fc5\u987b\u9009\u62e9\u4e00\u4e2a\u4e3bproposer\uff0c\u5e76\u89c4\u5b9a\u53ea\u6709\u4e3bproposer\u624d\u80fd\u63d0\u51fa\u63d0\u8bae\u3002<\/p>\n<p><strong>\u56db\u3001\u603b\u7ed3<\/strong><\/p>\n<p>\u672c\u7bc7\u5206\u6790\u4e86\u4e00\u81f4\u6027\u534f\u8bae\uff0c\u5e76\u4e14\u4ece\u7406\u8bba\u4e0a\u7740\u91cd\u5206\u6790\u4e86Paxos\u7b97\u6cd5\uff0c\u7406\u89e3\u4e86\u5176\u542b\u4e49\uff0c\u4e5f\u8c22\u8c22\u5404\u4f4d\u56ed\u53cb\u7684\u89c2\u770b~<\/p>\n<p>&nbsp;<\/p>\n<p>\u53c2\u8003\u94fe\u63a5\uff1a<\/p>\n<p>http:\/\/www.cnblogs.com\/bangerlee\/p\/5655754.html<\/p>\n<p>http:\/\/flychao88.iteye.com\/blog\/2262326<\/p>\n<p>http:\/\/www.tudou.com\/programs\/view\/e8zM8dAL6hM\/<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u524d\u8a00 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