{"id":852,"date":"2018-07-20T08:48:41","date_gmt":"2018-07-20T00:48:41","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=852"},"modified":"2018-07-20T08:48:41","modified_gmt":"2018-07-20T00:48:41","slug":"%e3%80%90%e5%88%86%e5%b8%83%e5%bc%8f%e3%80%91zookeeper%e4%b8%8epaxos","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=852","title":{"rendered":"\u3010\u5206\u5e03\u5f0f\u3011Zookeeper\u4e0ePaxos"},"content":{"rendered":"

\u4e00\u3001\u524d\u8a00<\/strong><\/p>\n

\u5728\u5b66\u4e60\u4e86Paxos\u5728Chubby\u4e2d\u7684\u5e94\u7528\u540e\uff0c\u63a5\u4e0b\u6765\u5b66\u4e60Paxos\u5728\u5f00\u6e90\u8f6f\u4ef6Zookeeper\u4e2d\u7684\u5e94\u7528\u3002<\/p>\n

\u4e8c\u3001Zookeeper<\/strong><\/p>\n

Zookeeper\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1\uff0c\u5176\u8bbe\u8ba1\u76ee\u6807\u662f\u5c06\u90a3\u4e9b\u590d\u6742\u7684\u4e14\u5bb9\u6613\u51fa\u9519\u7684\u5206\u5e03\u5f0f\u4e00\u81f4\u6027\u670d\u52a1\u5c01\u88c5\u8d77\u6765\uff0c\u6784\u6210\u4e00\u4e2a\u9ad8\u6548\u53ef\u9760\u7684\u539f\u8bed\u96c6\uff0c\u5e76\u4ee5\u4e00\u4e9b\u5217\u7b80\u5355\u7684\u63a5\u53e3\u63d0\u4f9b\u7ed9\u7528\u6237\u4f7f\u7528\u3002\u5176\u662f\u4e00\u4e2a\u5178\u578b\u7684\u5206\u5e03\u5f0f\u6570\u636e\u4e00\u81f4\u6027\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5206\u5e03\u5f0f\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u57fa\u4e8e\u5b83\u5b9e\u73b0\u8bf8\u5982\u6570\u636e\u53d1\u5e03\/\u53d1\u5e03\u3001\u8d1f\u8f7d\u5747\u8861\u3001\u547d\u540d\u670d\u52a1\u3001\u5206\u5e03\u5f0f\u534f\u8c03\/\u901a\u77e5\u3001\u96c6\u7fa4\u7ba1\u7406\u3001Master\u9009\u4e3e\u3001\u5206\u5e03\u5f0f\u9501\u548c\u5206\u5e03\u5f0f\u961f\u5217\u7b49\u529f\u80fd\u3002\u5176\u53ef\u4ee5\u4fdd\u8bc1\u5982\u4e0b\u5206\u5e03\u5f0f\u4e00\u81f4\u6027\u7279\u6027\u3002<\/p>\n

\u2460\u00a0\u987a\u5e8f\u4e00\u81f4\u6027<\/strong>\uff0c\u4ece\u540c\u4e00\u4e2a\u5ba2\u6237\u7aef\u53d1\u8d77\u7684\u4e8b\u52a1\u8bf7\u6c42\uff0c\u6700\u7ec8\u5c06\u4f1a\u4e25\u683c\u5730\u6309\u7167\u5176\u53d1\u8d77\u987a\u5e8f\u88ab\u5e94\u7528\u5230Zookeeper\u4e2d\u53bb\u3002<\/p>\n

\u2461\u00a0\u539f\u5b50\u6027<\/strong>\uff0c\u6240\u6709\u4e8b\u52a1\u8bf7\u6c42\u7684\u5904\u7406\u7ed3\u679c\u5728\u6574\u4e2a\u96c6\u7fa4\u4e2d\u6240\u6709\u673a\u5668\u4e0a\u7684\u5e94\u7528\u60c5\u51b5\u662f\u4e00\u81f4\u7684\uff0c\u5373\u6574\u4e2a\u96c6\u7fa4\u8981\u4e48\u90fd\u6210\u529f\u5e94\u7528\u4e86\u67d0\u4e2a\u4e8b\u52a1\uff0c\u8981\u4e48\u90fd\u6ca1\u6709\u5e94\u7528\u3002<\/p>\n

\u2462\u00a0\u5355\u4e00\u89c6\u56fe<\/strong>\uff0c\u65e0\u8bba\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u662f\u54ea\u4e2aZookeeper\u670d\u52a1\u5668\uff0c\u5176\u770b\u5230\u7684\u670d\u52a1\u7aef\u6570\u636e\u6a21\u578b\u90fd\u662f\u4e00\u81f4\u7684\u3002<\/p>\n

\u2463\u00a0\u53ef\u9760\u6027<\/strong>\uff0c\u4e00\u65e6\u670d\u52a1\u7aef\u6210\u529f\u5730\u5e94\u7528\u4e86\u4e00\u4e2a\u4e8b\u52a1\uff0c\u5e76\u5b8c\u6210\u5bf9\u5ba2\u6237\u7aef\u7684\u54cd\u5e94\uff0c\u90a3\u4e48\u8be5\u4e8b\u52a1\u6240\u5f15\u8d77\u7684\u670d\u52a1\u7aef\u72b6\u6001\u53d8\u66f4\u5c06\u4f1a\u4e00\u76f4\u88ab\u4fdd\u7559\uff0c\u9664\u975e\u6709\u53e6\u4e00\u4e2a\u4e8b\u52a1\u5bf9\u5176\u8fdb\u884c\u4e86\u53d8\u66f4\u3002<\/p>\n

\u2464\u00a0\u5b9e\u65f6\u6027<\/strong>\uff0cZookeeper\u4fdd\u8bc1\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u6bb5\u5185\uff0c\u5ba2\u6237\u7aef\u6700\u7ec8\u4e00\u5b9a\u80fd\u591f\u4ece\u670d\u52a1\u7aef\u4e0a\u8bfb\u53d6\u5230\u6700\u65b0\u7684\u6570\u636e\u72b6\u6001\u3002<\/p>\n

2.1 \u8bbe\u8ba1\u76ee\u6807<\/strong><\/p>\n

Zookeeper\u81f4\u529b\u4e8e\u63d0\u4f9b\u4e00\u4e2a\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u7528\u3001\u4e14\u5177\u6709\u4e25\u683c\u7684\u987a\u5e8f\u8bbf\u95ee\u63a7\u5236\u80fd\u529b\uff08\u4e3b\u8981\u662f\u5199\u64cd\u4f5c\u7684\u4e25\u683c\u987a\u5e8f\u6027\uff09\u7684\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1\uff0c\u5176\u5177\u6709\u5982\u4e0b\u7684\u8bbe\u8ba1\u76ee\u6807\u3002<\/p>\n

\u2460\u00a0\u7b80\u5355\u7684\u6570\u636e\u6a21\u578b<\/strong>\uff0cZookeeper\u4f7f\u5f97\u5206\u5e03\u5f0f\u7a0b\u5e8f\u80fd\u591f\u901a\u8fc7\u4e00\u4e2a\u5171\u4eab\u7684\u6811\u5f62\u7ed3\u6784\u7684\u540d\u5b57\u7a7a\u95f4\u6765\u8fdb\u884c\u76f8\u4e92\u534f\u8c03\uff0c\u5373Zookeeper\u670d\u52a1\u5668\u5185\u5b58\u4e2d\u7684\u6570\u636e\u6a21\u578b\u7531\u4e00\u7cfb\u5217\u88ab\u79f0\u4e3aZNode\u7684\u6570\u636e\u8282\u70b9\u7ec4\u6210\uff0cZookeeper\u5c06\u5168\u91cf\u7684\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u4ee5\u6b64\u6765\u63d0\u9ad8\u670d\u52a1\u5668\u541e\u5410\u3001\u51cf\u5c11\u5ef6\u8fdf\u7684\u76ee\u7684<\/strong>\u3002<\/p>\n

\u2461\u00a0\u53ef\u6784\u5efa\u96c6\u7fa4<\/strong>\uff0c\u4e00\u4e2aZookeeper\u96c6\u7fa4\u901a\u5e38\u7531\u4e00\u7ec4\u673a\u5668\u6784\u6210\uff0c\u7ec4\u6210Zookeeper\u96c6\u7fa4\u7684\u800c\u6bcf\u53f0\u673a\u5668\u90fd\u4f1a\u5728\u5185\u5b58\u4e2d\u7ef4\u62a4\u5f53\u524d\u670d\u52a1\u5668\u72b6\u6001\uff0c\u5e76\u4e14\u6bcf\u53f0\u673a\u5668\u4e4b\u95f4\u90fd\u76f8\u4e92\u901a\u4fe1\u3002<\/p>\n

\u2462\u00a0\u987a\u5e8f\u8bbf\u95ee<\/strong>\uff0c\u5bf9\u4e8e\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u6bcf\u4e2a\u66f4\u65b0\u8bf7\u6c42\uff0cZookeeper\u90fd\u4f1a\u5206\u914d\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u7684\u9012\u589e\u7f16\u53f7\uff0c\u8fd9\u4e2a\u7f16\u53f7\u53cd\u6620\u4e86\u6240\u6709\u4e8b\u52a1\u64cd\u4f5c\u7684\u5148\u540e\u987a\u5e8f\u3002<\/p>\n

\u2463\u00a0\u9ad8\u6027\u80fd<\/strong>\uff0cZookeeper\u5c06\u5168\u91cf\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u5e76\u76f4\u63a5\u670d\u52a1\u4e8e\u5ba2\u6237\u7aef\u7684\u6240\u6709\u975e\u4e8b\u52a1\u8bf7\u6c42\uff0c\u56e0\u6b64\u5b83\u5c24\u5176\u9002\u7528\u4e8e\u4ee5\u8bfb\u64cd\u4f5c\u4e3a\u4e3b\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n

2.2 \u57fa\u672c\u6982\u5ff5<\/strong><\/p>\n

\u2460\u00a0\u96c6\u7fa4\u89d2\u8272<\/strong>\uff0c\u6700\u5178\u578b\u7684\u96c6\u7fa4\u5c31\u662fMaster\/Slave\u6a21\u5f0f\uff08\u4e3b\u5907\u6a21\u5f0f\uff09\uff0c\u6b64\u60c5\u51b5\u4e0b\u628a\u6240\u6709\u80fd\u591f\u5904\u7406\u5199\u64cd\u4f5c\u7684\u673a\u5668\u79f0\u4e3aMaster\u673a\u5668\uff0c\u628a\u6240\u6709\u901a\u8fc7\u5f02\u6b65\u590d\u5236\u65b9\u5f0f\u83b7\u53d6\u6700\u65b0\u6570\u636e\uff0c\u5e76\u63d0\u4f9b\u8bfb\u670d\u52a1\u7684\u673a\u5668\u4e3aSlave\u673a\u5668\u3002Zookeeper\u5f15\u5165\u4e86Leader\u3001Follower\u3001Observer\u4e09\u79cd\u89d2\u8272\uff0cZookeeper\u96c6\u7fa4\u4e2d\u7684\u6240\u6709\u673a\u5668\u901a\u8fc7Leaser\u9009\u4e3e\u8fc7\u7a0b\u6765\u9009\u5b9a\u4e00\u53f0\u88ab\u79f0\u4e3aLeader\u7684\u673a\u5668\uff0cLeader\u670d\u52a1\u5668\u4e3a\u5ba2\u6237\u7aef\u63d0\u4f9b\u5199\u670d\u52a1\uff0cFollower\u548cObserver\u63d0\u4f9b\u8bfb\u670d\u52a1\uff0c\u4f46\u662fObserver\u4e0d\u53c2\u4e0eLeader\u9009\u4e3e\u8fc7\u7a0b<\/strong>\uff0c\u4e0d\u53c2\u4e0e\u5199\u64cd\u4f5c<\/strong>\u7684\u8fc7\u534a\u5199\u6210\u529f<\/strong>\u7b56\u7565\uff0cObserver\u53ef\u4ee5\u5728\u4e0d\u5f71\u54cd\u5199\u6027\u80fd\u7684\u60c5\u51b5\u4e0b\u63d0\u5347\u96c6\u7fa4\u7684\u6027\u80fd\u3002<\/p>\n

\u2461\u00a0\u4f1a\u8bdd<\/strong>\uff0c\u6307\u5ba2\u6237\u7aef\u4f1a\u8bdd\uff0c\u4e00\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u662f\u6307\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u4e4b\u95f4\u7684\u4e00\u4e2aTCP\u957f\u8fde\u63a5<\/strong>\uff0cZookeeper\u5bf9\u5916\u7684\u670d\u52a1\u7aef\u53e3\u9ed8\u8ba4\u4e3a2181\uff0c\u5ba2\u6237\u7aef\u542f\u52a8\u7684\u65f6\u5019\uff0c\u9996\u5148\u4f1a\u4e0e\u670d\u52a1\u5668\u5efa\u7acb\u4e00\u4e2aTCP\u8fde\u63a5\uff0c\u4ece\u7b2c\u4e00\u6b21\u8fde\u63a5\u5efa\u7acb\u5f00\u59cb\uff0c\u5ba2\u6237\u7aef\u4f1a\u8bdd\u7684\u751f\u547d\u5468\u671f\u4e5f\u5f00\u59cb\u4e86\uff0c\u901a\u8fc7\u8fd9\u4e2a\u8fde\u63a5\uff0c\u5ba2\u6237\u7aef\u80fd\u591f\u5fc3\u8df3\u68c0\u6d4b\u4e0e\u670d\u52a1\u5668\u4fdd\u6301\u6709\u6548\u7684\u4f1a\u8bdd\uff0c\u4e5f\u80fd\u591f\u5411Zookeeper\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u5e76\u63a5\u53d7\u54cd\u5e94\uff0c\u540c\u65f6\u8fd8\u80fd\u591f\u901a\u8fc7\u8be5\u8fde\u63a5\u63a5\u53d7\u6765\u81ea\u670d\u52a1\u5668\u7684Watch\u4e8b\u4ef6\u901a\u77e5\u3002<\/p>\n

\u2462\u00a0\u6570\u636e\u8282\u70b9<\/strong>\uff0c\u7b2c\u4e00\u7c7b\u6307\u6784\u6210\u96c6\u7fa4\u7684\u673a\u5668\uff0c\u79f0\u4e3a\u673a\u5668\u8282\u70b9<\/strong>\uff0c\u7b2c\u4e8c\u7c7b\u662f\u6307\u6570\u636e\u6a21\u578b\u4e2d\u7684\u6570\u636e\u5355\u5143<\/strong>\uff0c\u79f0\u4e3a\u6570\u636e\u8282\u70b9-Znode\uff0cZookeeper\u5c06\u6240\u6709\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d<\/strong>\uff0c\u6570\u636e\u6a21\u578b\u662f\u4e00\u68f5\u6811\uff0c\u7531\u659c\u6760\/\u8fdb\u884c\u5206\u5272\u7684\u8def\u5f84\uff0c\u5c31\u662f\u4e00\u4e2aZNode\uff0c\u5982\/foo\/path1\uff0c\u6bcf\u4e2aZNode\u90fd\u4f1a\u4fdd\u5b58\u81ea\u5df1\u7684\u6570\u636e\u5185\u5b58\uff0c\u540c\u65f6\u8fd8\u4f1a\u4fdd\u5b58\u4e00\u4e9b\u5217\u5c5e\u6027\u4fe1\u606f\u3002ZNode\u5206\u4e3a\u6301\u4e45\u8282\u70b9<\/strong>\u548c\u4e34\u65f6\u8282\u70b9<\/strong>\u4e24\u7c7b\uff0c\u6301\u4e45\u8282\u70b9\u662f\u6307\u4e00\u65e6\u8fd9\u4e2aZNode\u88ab\u521b\u5efa\u4e86\uff0c\u9664\u975e\u4e3b\u52a8\u8fdb\u884cZNode\u7684\u79fb\u9664\u64cd\u4f5c\uff0c\u5426\u5219\u8fd9\u4e2aZNode\u5c06\u4e00\u76f4\u4fdd\u5b58\u5728Zookeeper\u4e0a<\/strong>\uff0c\u800c\u4e34\u65f6\u8282\u70b9\u7684\u751f\u547d\u5468\u671f\u548c\u5ba2\u6237\u7aef\u4f1a\u8bdd\u7ed1\u5b9a\uff0c\u4e00\u65e6\u5ba2\u6237\u7aef\u4f1a\u8bdd\u5931\u6548\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5ba2\u6237\u7aef\u521b\u5efa\u7684\u6240\u6709\u4e34\u65f6\u8282\u70b9\u90fd\u4f1a\u88ab\u79fb\u9664<\/strong>\u3002\u53e6\u5916\uff0cZookeeper\u8fd8\u5141\u8bb8\u7528\u6237\u4e3a\u6bcf\u4e2a\u8282\u70b9\u6dfb\u52a0\u4e00\u4e2a\u7279\u6b8a\u7684\u5c5e\u6027\uff1aSEQUENTIAL<\/strong>\u3002\u4e00\u65e6\u8282\u70b9\u88ab\u6807\u8bb0\u4e0a\u8fd9\u4e2a\u5c5e\u6027\uff0c\u90a3\u4e48\u5728\u8fd9\u4e2a\u8282\u70b9\u88ab\u521b\u5efa\u7684\u65f6\u5019\uff0cZookeeper\u4f1a\u81ea\u52a8\u5728\u5176\u8282\u70b9\u540e\u9762\u8ffd\u52a0\u4e00\u4e2a\u6574\u5f62\u6570\u5b57\uff0c\u5176\u662f\u7531\u7236\u8282\u70b9\u7ef4\u62a4\u7684\u81ea\u589e\u6570\u5b57\u3002<\/p>\n

\u2463\u00a0\u7248\u672c<\/strong>\uff0c\u5bf9\u4e8e\u6bcf\u4e2aZNode\uff0cZookeeper\u90fd\u4f1a\u4e3a\u5176\u7ef4\u62a4\u4e00\u4e2a\u53eb\u4f5cStat\u7684\u6570\u636e\u7ed3\u6784\uff0cStat\u8bb0\u5f55\u4e86\u8fd9\u4e2aZNode\u7684\u4e09\u4e2a\u6570\u636e\u7248\u672c\uff0c\u5206\u522b\u662fversion\uff08\u5f53\u524dZNode\u7684\u7248\u672c\uff09\u3001cversion\uff08\u5f53\u524dZNode\u5b50\u8282\u70b9\u7684\u7248\u672c\uff09\u3001aversion\uff08\u5f53\u524dZNode\u7684ACL\u7248\u672c\uff09\u3002<\/p>\n

\u2464\u00a0Watcher<\/strong>\uff0cZookeeper\u5141\u8bb8\u7528\u6237\u5728\u6307\u5b9a\u8282\u70b9\u4e0a\u6ce8\u518c\u4e00\u4e9bWatcher\uff0c\u5e76\u4e14\u5728\u4e00\u4e9b\u7279\u5b9a\u4e8b\u4ef6\u89e6\u53d1\u7684\u65f6\u5019\uff0cZookeeper\u670d\u52a1\u7aef\u4f1a\u5c06\u4e8b\u4ef6\u901a\u77e5\u5230\u611f\u5174\u8da3\u7684\u5ba2\u6237\u7aef\u3002<\/p>\n

\u2465\u00a0ACL<\/strong>\uff0cZookeeper\u91c7\u7528ACL\uff08Access Control Lists\uff09\u7b56\u7565\u6765\u8fdb\u884c\u6743\u9650\u63a7\u5236\uff0c\u5176\u5b9a\u4e49\u4e86\u5982\u4e0b\u4e94\u79cd\u6743\u9650\uff1a<\/p>\n

\u00b7 CREATE\uff1a\u521b\u5efa\u5b50\u8282\u70b9\u7684\u6743\u9650\u3002<\/p>\n

\u00b7 READ\uff1a\u83b7\u53d6\u8282\u70b9\u6570\u636e\u548c\u5b50\u8282\u70b9\u5217\u8868\u7684\u6743\u9650\u3002<\/p>\n

\u00b7 WRITE\uff1a\u66f4\u65b0\u8282\u70b9\u6570\u636e\u7684\u6743\u9650\u3002<\/p>\n

\u00b7 DELETE\uff1a\u5220\u9664\u5b50\u8282\u70b9\u7684\u6743\u9650\u3002<\/p>\n

\u00b7 ADMIN\uff1a\u8bbe\u7f6e\u8282\u70b9ACL\u7684\u6743\u9650\u3002<\/p>\n

\u30002.3 ZAB\u534f\u8bae<\/strong><\/p>\n

Zookeeper\u4f7f\u7528\u4e86Zookeeper Atomic Broadcast\uff08ZAB\uff0cZookeeper\u539f\u5b50\u6d88\u606f\u5e7f\u64ad\u534f\u8bae\uff09\u7684\u534f\u8bae\u4f5c\u4e3a\u5176\u6570\u636e\u4e00\u81f4\u6027\u7684\u6838\u5fc3\u7b97\u6cd5\u3002ZAB\u534f\u8bae\u662f\u4e3aZookeeper\u4e13\u95e8\u8bbe\u8ba1\u7684\u4e00\u79cd\u652f\u6301\u5d29\u6e83\u6062\u590d\u7684\u539f\u5b50\u5e7f\u64ad\u534f\u8bae\u3002<\/strong><\/p>\n

\u3000\u3000<\/strong>Zookeeper\u4f9d\u8d56ZAB\u534f\u8bae\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u6570\u636e\u7684\u4e00\u81f4\u6027\uff0c\u57fa\u4e8e\u8be5\u534f\u8bae\uff0cZookeeper\u5b9e\u73b0\u4e86\u4e00\u79cd\u4e3b\u5907\u6a21\u5f0f\u7684\u7cfb\u7edf\u67b6\u6784\u6765\u4fdd\u6301\u96c6\u7fa4\u4e2d\u5404\u526f\u672c\u4e4b\u95f4\u7684\u6570\u636e\u7684\u4e00\u81f4\u6027\uff0c\u5373\u5176\u4f7f\u7528\u4e00\u4e2a\u5355\u4e00\u7684\u8bf8\u8fdb\u7a0b\u6765\u63a5\u6536\u5e76\u5904\u7406\u5ba2\u6237\u7aef\u7684\u6240\u6709\u4e8b\u52a1\u8bf7\u6c42\uff0c\u5e76\u91c7\u7528ZAB\u7684\u539f\u5b50\u5e7f\u64ad\u534f\u8bae\uff0c\u5c06\u670d\u52a1\u5668\u6570\u636e\u7684\u72b6\u6001\u53d8\u66f4\u4ee5\u4e8b\u52a1Proposal\u7684\u5f62\u5f0f\u5e7f\u64ad\u5230\u6240\u6709\u7684\u526f\u672c\u8fdb\u7a0b\u4e2d\uff0cZAB\u534f\u8bae\u7684\u4e3b\u5907\u6a21\u578b\u67b6\u6784\u4fdd\u8bc1\u4e86\u540c\u4e00\u65f6\u523b\u96c6\u7fa4\u4e2d\u53ea\u80fd\u591f\u6709\u4e00\u4e2a\u4e3b\u8fdb\u7a0b\u6765\u5e7f\u64ad\u670d\u52a1\u5668\u7684\u72b6\u6001\u53d8\u66f4\uff0c\u56e0\u6b64\u80fd\u591f\u5f88\u597d\u5730\u5904\u7406\u5ba2\u6237\u7aef\u5927\u91cf\u7684\u5e76\u53d1\u8bf7\u6c42\u3002<\/p>\n

ZAB\u534f\u8bae\u7684\u6838\u5fc3\u662f\u5b9a\u4e49\u4e86\u5bf9\u4e8e\u90a3\u4e9b\u4f1a\u6539\u53d8Zookeeper\u670d\u52a1\u5668\u6570\u636e\u72b6\u6001\u7684\u4e8b\u52a1\u8bf7\u6c42\u7684\u5904\u7406\u65b9\u5f0f\uff0c\u5373\uff1a\u6240\u6709\u4e8b\u52a1\u8bf7\u6c42\u5fc5\u987b\u7531\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u7684\u670d\u52a1\u5668\u6765\u534f\u8c03\u5904\u7406<\/strong>\uff0c\u8fd9\u6837\u7684\u670d\u52a1\u5668\u88ab\u79f0\u4e3aLeader\u670d\u52a1\u5668\uff0c\u4f59\u4e0b\u7684\u670d\u52a1\u5668\u5219\u79f0\u4e3aFollower\u670d\u52a1\u5668\uff0cLeader\u670d\u52a1\u5668\u8d1f\u8d23\u5c06\u4e00\u4e2a\u5ba2\u6237\u7aef\u4e8b\u52a1\u8bf7\u6c42\u8f6c\u5316\u6210\u4e00\u4e2a\u4e8b\u52a1Proposal\uff08\u63d0\u8bae\uff09\uff0c\u5e76\u5c06\u8be5Proposal\u5206\u53d1\u7ed9\u96c6\u7fa4\u4e2d\u6240\u6709\u7684Follower\u670d\u52a1\u5668\uff0c\u4e4b\u540eLeader\u670d\u52a1\u5668\u9700\u8981\u7b49\u5f85\u6240\u6709Follower\u670d\u52a1\u5668\u7684\u53cd\u9988\uff0c\u4e00\u65e6\u8d85\u8fc7\u534a\u6570\u7684Follower\u670d\u52a1\u5668\u8fdb\u884c\u4e86\u6b63\u786e\u7684\u53cd\u9988\u540e\uff0c\u90a3\u4e48Leader\u5c31\u4f1a\u518d\u6b21\u5411\u6240\u6709\u7684Follower\u670d\u52a1\u5668\u5206\u53d1Commit\u6d88\u606f\uff0c\u8981\u6c42\u5176\u5c06\u524d\u4e00\u4e2aProposal\u8fdb\u884c\u63d0\u4ea4\u3002<\/p>\n

ZAB\u4e00\u4e9b\u5305\u62ec\u4e24\u79cd\u57fa\u672c\u7684\u6a21\u5f0f\uff1a\u5d29\u6e83\u6062\u590d<\/strong>\u548c\u6d88\u606f\u5e7f\u64ad<\/strong>\u3002<\/p>\n

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\"\"<\/p>\n

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\"\"<\/p>\n

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\"\"\u3000\u3000\u5047\u8bbe\u521d\u59cb\u7684Leader\u670d\u52a1\u5668Server1\u5728\u63d0\u51fa\u4e00\u4e2a\u4e8b\u52a1Proposal3\u4e4b\u540e\u5c31\u5d29\u6e83\u9000\u51fa\u4e86\uff0c\u4ece\u800c\u5bfc\u81f4\u96c6\u7fa4\u4e2d\u7684\u5176\u4ed6\u670d\u52a1\u5668\u90fd\u6ca1\u6709\u6536\u5230\u8fd9\u4e2a\u4e8b\u52a1Proposal\uff0c\u4e8e\u662f\uff0c\u5f53Server1\u6062\u590d\u8fc7\u6765\u518d\u6b21\u52a0\u5165\u5230\u96c6\u7fa4\u4e2d\u7684\u65f6\u5019\uff0cZAB\u534f\u8bae\u9700\u8981\u786e\u4fdd\u4e22\u5f03Proposal3\u8fd9\u4e2a\u4e8b\u52a1\u3002<\/p>\n

\u5728\u4e0a\u8ff0\u7684\u5d29\u6e83\u6062\u590d\u8fc7\u7a0b\u4e2d\u9700\u8981\u5904\u7406\u7684\u7279\u6b8a\u60c5\u51b5\uff0c\u5c31\u51b3\u5b9a\u4e86ZAB\u534f\u8bae\u5fc5\u987b\u8bbe\u8ba1\u8fd9\u6837\u7684Leader\u9009\u4e3e\u7b97\u6cd5\uff1a\u80fd\u591f\u786e\u4fdd\u63d0\u4ea4\u5df2\u7ecf\u88abLeader\u63d0\u4ea4\u7684\u4e8b\u52a1\u7684Proposal\uff0c\u540c\u65f6\u4e22\u5f03\u5df2\u7ecf\u88ab\u8df3\u8fc7\u7684\u4e8b\u52a1Proposal\u3002\u5982\u679c\u8ba9Leader\u9009\u4e3e\u7b97\u6cd5\u80fd\u591f\u4fdd\u8bc1\u65b0\u9009\u4e3e\u51fa\u6765\u7684Leader\u670d\u52a1\u5668\u62e5\u6709\u96c6\u7fa4\u4e2d\u6240\u6709\u673a\u5668\u6700\u9ad8\u7f16\u53f7\uff08ZXID\u6700\u5927\uff09\u7684\u4e8b\u52a1Proposal\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u4fdd\u8bc1\u8fd9\u4e2a\u65b0\u9009\u4e3e\u51fa\u6765\u7684Leader\u4e00\u5b9a\u5177\u6709\u6240\u6709\u5df2\u7ecf\u63d0\u4ea4\u7684\u63d0\u8bae\uff0c\u66f4\u4e3a\u91cd\u8981\u7684\u662f\u5982\u679c\u8ba9\u5177\u6709\u6700\u9ad8\u7f16\u53f7\u4e8b\u52a1\u7684Proposal\u673a\u5668\u79f0\u4e3aLeader\uff0c\u5c31\u53ef\u4ee5\u7701\u53bbLeader\u670d\u52a1\u5668\u67e5\u8be2Proposal\u7684\u63d0\u4ea4\u548c\u4e22\u5f03\u5de5\u4f5c\u8fd9\u4e00\u6b65\u9aa4\u4e86\u3002<\/p>\n

\u2463\u00a0\u6570\u636e\u540c\u6b65<\/strong>\uff0c\u5b8c\u6210Leader\u9009\u4e3e\u540e\uff0c\u5728\u6b63\u5f0f\u5f00\u59cb\u5de5\u4f5c\u524d\uff0cLeader\u670d\u52a1\u5668\u9996\u5148\u4f1a\u786e\u8ba4\u65e5\u5fd7\u4e2d\u7684\u6240\u6709Proposal\u662f\u5426\u90fd\u5df2\u7ecf\u88ab\u96c6\u7fa4\u4e2d\u7684\u8fc7\u534a\u673a\u5668\u63d0\u4ea4\u4e86\uff0c\u5373\u662f\u5426\u5b8c\u6210\u4e86\u6570\u636e\u540c\u6b65\u3002Leader\u670d\u52a1\u5668\u9700\u8981\u786e\u6240\u6709\u7684Follower\u670d\u52a1\u5668\u90fd\u80fd\u591f\u63a5\u6536\u5230\u6bcf\u4e00\u6761\u4e8b\u52a1Proposal\uff0c\u5e76\u4e14\u80fd\u591f\u6b63\u786e\u5730\u5c06\u6240\u6709\u5df2\u7ecf\u63d0\u4ea4\u4e86\u7684\u4e8b\u52a1Proposal\u5e94\u7528\u5230\u5185\u5b58\u6570\u636e\u5e93\u4e2d\u3002Leader\u670d\u52a1\u5668\u4f1a\u4e3a\u6bcf\u4e2aFollower\u670d\u52a1\u5668\u7ef4\u62a4\u4e00\u4e2a\u961f\u5217\uff0c\u5e76\u5c06\u90a3\u4e9b\u6ca1\u6709\u88ab\u5404Follower\u670d\u52a1\u5668\u540c\u6b65\u7684\u4e8b\u52a1\u4ee5Proposal\u6d88\u606f\u7684\u5f62\u5f0f\u9010\u4e2a\u53d1\u9001\u7ed9Follower\u670d\u52a1\u5668\uff0c\u5e76\u5728\u6bcf\u4e00\u4e2aProposal\u6d88\u606f\u540e\u9762\u7d27\u63a5\u7740\u518d\u53d1\u9001\u4e00\u4e2aCommit\u6d88\u606f\uff0c\u4ee5\u8868\u793a\u8be5\u4e8b\u52a1\u5df2\u7ecf\u88ab\u63d0\u4ea4\uff0c\u7b49\u5230Follower\u670d\u52a1\u5668\u5c06\u6240\u6709\u5176\u5c1a\u672a\u540c\u6b65\u7684\u4e8b\u52a1Proposal\u90fd\u4eceLeader\u670d\u52a1\u5668\u4e0a\u540c\u6b65\u8fc7\u6765\u5e76\u6210\u529f\u5e94\u7528\u5230\u672c\u5730\u6570\u636e\u5e93\u540e\uff0cLeader\u670d\u52a1\u5668\u5c31\u4f1a\u5c06\u8be5Follower\u670d\u52a1\u5668\u52a0\u5165\u5230\u771f\u6b63\u7684\u53ef\u7528Follower\u5217\u8868\u5e76\u5f00\u59cb\u4e4b\u540e\u7684\u5176\u4ed6\u6d41\u7a0b\u3002<\/p>\n

\u4e0b\u9762\u5206\u6790ZAB\u534f\u8bae\u5982\u4f55\u5904\u7406\u9700\u8981\u4e22\u5f03\u7684\u4e8b\u52a1Proposal\u7684\uff0cZXID\u662f\u4e00\u4e2a64\u4f4d\u7684\u6570\u5b57\uff0c\u5176\u4e2d32\u4f4d\u53ef\u4ee5\u770b\u505a\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5355\u8c03\u9012\u589e\u7684\u8ba1\u6570\u5668\uff0c\u9488\u5bf9\u5ba2\u6237\u7aef\u7684\u6bcf\u4e00\u4e2a\u4e8b\u52a1\u8bf7\u6c42\uff0cLeader\u670d\u52a1\u5668\u5728\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u4e8b\u52a1Proposal\u65f6\uff0c\u90fd\u4f1a\u5bf9\u8be5\u8ba1\u6570\u5668\u8fdb\u884c\u52a01\u64cd\u4f5c\uff0c\u800c\u9ad832\u4f4d\u5219\u4ee3\u8868\u4e86Leader\u5468\u671fepoch\u7684\u7f16\u53f7\uff0c\u6bcf\u5f53\u9009\u4e3e\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684Leader\u65f6\uff0c\u5c31\u4f1a\u4ece\u8fd9\u4e2aLeader\u4e0a\u53d6\u51fa\u5176\u672c\u5730\u65e5\u5fd7\u4e2d\u6700\u5927\u4e8b\u52a1Proposal\u7684ZXID\uff0c\u5e76\u89e3\u6790\u51faepoch\u503c\uff0c\u7136\u540e\u52a01\uff0c\u4e4b\u540e\u4ee5\u8be5\u7f16\u53f7\u4f5c\u4e3a\u65b0\u7684epoch\uff0c\u4f4e32\u4f4d\u5219\u7f6e\u4e3a0\u6765\u5f00\u59cb\u751f\u6210\u65b0\u7684ZXID\uff0cZAB\u534f\u8bae\u901a\u8fc7epoch\u53f7\u6765\u533a\u5206Leader\u5468\u671f\u53d8\u5316\u7684\u7b56\u7565\uff0c\u80fd\u591f\u6709\u6548\u5730\u907f\u514d\u4e0d\u540c\u7684Leader\u670d\u52a1\u5668\u9519\u8bef\u5730\u4f7f\u7528\u4e0d\u540c\u7684ZXID\u7f16\u53f7\u63d0\u51fa\u4e0d\u4e00\u6837\u7684\u4e8b\u52a1Proposal\u7684\u5f02\u5e38\u60c5\u51b5\u3002\u5f53\u4e00\u4e2a\u5305\u542b\u4e86\u4e0a\u4e00\u4e2aLeader\u5468\u671f\u4e2d\u5c1a\u672a\u63d0\u4ea4\u8fc7\u7684\u4e8b\u52a1Proposal\u7684\u670d\u52a1\u5668\u542f\u52a8\u65f6\uff0c\u5176\u80af\u5b9a\u65e0\u6cd5\u6210\u4e3aLeader\uff0c\u56e0\u4e3a\u5f53\u524d\u96c6\u7fa4\u4e2d\u4e00\u5b9a\u5305\u542b\u4e86\u4e00\u4e2aQuorum\uff08\u8fc7\u534a\uff09\u96c6\u5408\uff0c\u8be5\u96c6\u5408\u4e2d\u7684\u673a\u5668\u4e00\u5b9a\u5305\u542b\u4e86\u66f4\u9ad8epoch\u7684\u4e8b\u52a1\u7684Proposal\uff0c\u56e0\u6b64\u8fd9\u53f0\u673a\u5668\u7684\u4e8b\u52a1Proposal\u5e76\u975e\u6700\u9ad8\uff0c\u4e5f\u5c31\u65e0\u6cd5\u6210\u4e3aLeader\u3002<\/strong><\/p>\n

\u3000\u30002.4 ZAB\u534f\u8bae\u539f\u7406<\/strong><\/p>\n

\u3000\u3000<\/strong>ZAB\u4e3b\u8981\u5305\u62ec\u6d88\u606f\u5e7f\u64ad\u548c\u5d29\u6e83\u6062\u590d\u4e24\u4e2a\u8fc7\u7a0b\uff0c\u8fdb\u4e00\u6b65\u53ef\u4ee5\u5206\u4e3a\u4e09\u4e2a\u9636\u6bb5\uff0c\u5206\u522b\u662f\u53d1\u73b0\uff08Discovery\uff09\u3001\u540c\u6b65\uff08Synchronization\uff09\u3001\u5e7f\u64ad\uff08Broadcast\uff09\u9636\u6bb5\u3002ZAB\u7684\u6bcf\u4e00\u4e2a\u5206\u5e03\u5f0f\u8fdb\u7a0b\u4f1a\u5faa\u73af\u6267\u884c\u8fd9\u4e09\u4e2a\u9636\u6bb5\uff0c\u79f0\u4e3a\u4e3b\u8fdb\u7a0b\u5468\u671f\u3002<\/p>\n

\u00b7 \u53d1\u73b0<\/strong>\uff0c\u9009\u4e3e\u4ea7\u751fPL(prospective leader)\uff0cPL\u6536\u96c6Follower epoch(cepoch)\uff0c\u6839\u636eFollower\u7684\u53cd\u9988\uff0cPL\u4ea7\u751fnewepoch(\u6bcf\u6b21\u9009\u4e3e\u4ea7\u751f\u65b0Leader\u7684\u540c\u65f6\u4ea7\u751f\u65b0epoch)\u3002<\/p>\n

\u00b7 \u540c\u6b65<\/strong>\uff0cPL\u8865\u9f50\u76f8\u6bd4Follower\u591a\u6570\u6d3e\u7f3a\u5931\u7684\u72b6\u6001\u3001\u4e4b\u540e\u5404Follower\u518d\u8865\u9f50\u76f8\u6bd4PL\u7f3a\u5931\u7684\u72b6\u6001\uff0cPL\u548cFollower\u5b8c\u6210\u72b6\u6001\u540c\u6b65\u540ePL\u53d8\u4e3a\u6b63\u5f0fLeader(established leader)\u3002<\/p>\n

\u00b7 \u5e7f\u64ad<\/strong>\uff0cLeader\u5904\u7406\u5ba2\u6237\u7aef\u7684\u5199\u64cd\u4f5c\uff0c\u5e76\u5c06\u72b6\u6001\u53d8\u66f4\u5e7f\u64ad\u81f3Follower\uff0cFollower\u591a\u6570\u6d3e\u901a\u8fc7\u4e4b\u540eLeader\u53d1\u8d77\u5c06\u72b6\u6001\u53d8\u66f4\u843d\u5730(deliver\/commit)\u3002<\/p>\n

\u5728\u6b63\u5e38\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0cZAB\u534f\u8bae\u4f1a\u4e00\u76f4\u8fd0\u884c\u4e8e\u9636\u6bb5\u4e09\u6765\u53cd\u590d\u8fdb\u884c\u6d88\u606f\u5e7f\u64ad\u6d41\u7a0b\uff0c\u5982\u679c\u51fa\u73b0\u5d29\u6e83\u6216\u5176\u4ed6\u539f\u56e0\u5bfc\u81f4Leader\u7f3a\u5931\uff0c\u90a3\u4e48\u6b64\u65f6ZAB\u534f\u8bae\u4f1a\u518d\u6b21\u8fdb\u5165\u53d1\u73b0\u9636\u6bb5\uff0c\u9009\u4e3e\u65b0\u7684Leader\u3002<\/p>\n

2.4.1 \u8fd0\u884c\u5206\u6790<\/p>\n

\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u53ef\u80fd\u5904\u4e8e\u5982\u4e0b\u4e09\u79cd\u72b6\u6001\u4e4b\u4e00<\/p>\n

\u00b7 LOOKING\uff1aLeader\u9009\u4e3e\u9636\u6bb5\u3002<\/p>\n

\u00b7 FOLLOWING\uff1aFollower\u670d\u52a1\u5668\u548cLeader\u670d\u52a1\u5668\u4fdd\u6301\u540c\u6b65\u72b6\u6001\u3002<\/p>\n

\u00b7 LEADING\uff1aLeader\u670d\u52a1\u5668\u4f5c\u4e3a\u4e3b\u8fdb\u7a0b\u9886\u5bfc\u72b6\u6001\u3002<\/p>\n

\u6240\u6709\u8fdb\u7a0b\u521d\u59cb\u72b6\u6001\u90fd\u662fLOOKING\u72b6\u6001\uff0c\u6b64\u65f6\u4e0d\u5b58\u5728Leader\uff0c\u6b64\u65f6\uff0c\u8fdb\u7a0b\u4f1a\u8bd5\u56fe\u9009\u4e3e\u51fa\u4e00\u4e2a\u65b0\u7684Leader\uff0c\u4e4b\u540e\uff0c\u5982\u679c\u8fdb\u7a0b\u53d1\u73b0\u5df2\u7ecf\u9009\u4e3e\u51fa\u65b0\u7684Leader\u4e86\uff0c\u90a3\u4e48\u5b83\u5c31\u4f1a\u5207\u6362\u5230FOLLOWING\u72b6\u6001\uff0c\u5e76\u5f00\u59cb\u548cLeader\u4fdd\u6301\u540c\u6b65\uff0c\u5904\u4e8eFOLLOWING\u72b6\u6001\u7684\u8fdb\u7a0b\u79f0\u4e3aFollower\uff0cLEADING\u72b6\u6001\u7684\u8fdb\u7a0b\u79f0\u4e3aLeader\uff0c\u5f53Leader\u5d29\u6e83\u6216\u653e\u5f03\u9886\u5bfc\u5730\u4f4d\u65f6\uff0c\u5176\u4f59\u7684Follower\u8fdb\u7a0b\u5c31\u4f1a\u8f6c\u6362\u5230LOOKING\u72b6\u6001\u5f00\u59cb\u65b0\u4e00\u8f6e\u7684Leader\u9009\u4e3e\u3002<\/p>\n

\u4e00\u4e2aFollower\u53ea\u80fd\u548c\u4e00\u4e2aLeader\u4fdd\u6301\u540c\u6b65\uff0cLeader\u8fdb\u7a0b\u548c\u6240\u6709\u4e0e\u6240\u6709\u7684Follower\u8fdb\u7a0b\u4e4b\u95f4\u90fd\u901a\u8fc7\u5fc3\u8df3\u68c0\u6d4b\u673a\u5236\u6765\u611f\u77e5\u5f7c\u6b64\u7684\u60c5\u51b5\u3002\u82e5Leader\u80fd\u591f\u5728\u8d85\u65f6\u65f6\u95f4\u5185\u6b63\u5e38\u6536\u5230\u5fc3\u8df3\u68c0\u6d4b\uff0c\u90a3\u4e48Follower\u5c31\u4f1a\u4e00\u76f4\u4e0e\u8be5Leader\u4fdd\u6301\u8fde\u63a5\uff0c\u800c\u5982\u679c\u5728\u6307\u5b9a\u65f6\u95f4\u5185Leader\u65e0\u6cd5\u4ece\u8fc7\u534a\u7684Follower\u8fdb\u7a0b\u90a3\u91cc\u63a5\u6536\u5230\u5fc3\u8df3\u68c0\u6d4b\uff0c\u6216\u8005TCP\u8fde\u63a5\u65ad\u5f00\uff0c\u90a3\u4e48Leader\u4f1a\u653e\u5f03\u5f53\u524d\u5468\u671f\u7684\u9886\u5bfc\uff0c\u6bd4\u4f60\u8f6c\u6362\u5230LOOKING\u72b6\u6001\uff0c\u5176\u4ed6\u7684Follower\u4e5f\u4f1a\u9009\u62e9\u653e\u5f03\u8fd9\u4e2aLeader\uff0c\u540c\u65f6\u8f6c\u6362\u5230LOOKING\u72b6\u6001\uff0c\u4e4b\u540e\u4f1a\u8fdb\u884c\u65b0\u4e00\u8f6e\u7684Leader\u9009\u4e3e\uff0c\u5e76\u5728\u9009\u4e3e\u4ea7\u751f\u65b0\u7684Leader\u4e4b\u540e\u5f00\u59cb\u65b0\u7684\u4e00\u8f6e\u4e3b\u8fdb\u7a0b\u5468\u671f\u3002<\/p>\n

2.5 ZAB\u4e0ePaxos\u7684\u8054\u7cfb\u548c\u533a\u522b<\/p>\n

\u8054\u7cfb\uff1a<\/p>\n

\u2460 \u90fd\u5b58\u5728\u4e00\u4e2a\u7c7b\u4f3c\u4e8eLeader\u8fdb\u7a0b\u7684\u89d2\u8272\uff0c\u7531\u5176\u8d1f\u8d23\u534f\u8c03\u591a\u4e2aFollower\u8fdb\u7a0b\u7684\u8fd0\u884c\u3002<\/p>\n

\u2461 Leader\u8fdb\u7a0b\u90fd\u4f1a\u7b49\u5f85\u8d85\u8fc7\u534a\u6570\u7684Follower\u505a\u51fa\u6b63\u786e\u7684\u53cd\u9988\u540e\uff0c\u624d\u4f1a\u5c06\u4e00\u4e2a\u63d0\u8bae\u8fdb\u884c\u63d0\u4ea4\u3002<\/p>\n

\u2462 \u5728ZAB\u534f\u8bae\u4e2d\uff0c\u6bcf\u4e2aProposal\u4e2d\u90fd\u5305\u542b\u4e86\u4e00\u4e2aepoch\u503c\uff0c\u7528\u6765\u4ee3\u8868\u5f53\u524d\u7684Leader\u5468\u671f\uff0c\u5728Paxos\u7b97\u6cd5\u4e2d\uff0c\u540c\u6837\u5b58\u5728\u8fd9\u6837\u7684\u4e00\u4e2a\u6807\u8bc6\uff0c\u540d\u5b57\u4e3aBallot\u3002<\/p>\n

\u533a\u522b\uff1a<\/p>\n

Paxos\u7b97\u6cd5\u4e2d\uff0c\u65b0\u9009\u4e3e\u4ea7\u751f\u7684\u4e3b\u8fdb\u7a0b\u4f1a\u8fdb\u884c\u4e24\u4e2a\u9636\u6bb5\u7684\u5de5\u4f5c\uff0c\u7b2c\u4e00\u9636\u6bb5\u79f0\u4e3a\u8bfb\u9636\u6bb5\uff0c\u65b0\u7684\u4e3b\u8fdb\u7a0b\u548c\u5176\u4ed6\u8fdb\u7a0b\u901a\u4fe1\u6765\u6536\u96c6\u4e3b\u8fdb\u7a0b\u63d0\u51fa\u7684\u63d0\u8bae\uff0c\u5e76\u5c06\u5b83\u4eec\u63d0\u4ea4\u3002\u7b2c\u4e8c\u9636\u6bb5\u79f0\u4e3a\u5199\u9636\u6bb5\uff0c\u5f53\u524d\u4e3b\u8fdb\u7a0b\u5f00\u59cb\u63d0\u51fa\u81ea\u5df1\u7684\u63d0\u8bae\u3002<\/p>\n

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