{"id":23,"date":"2022-11-07T23:50:14","date_gmt":"2022-11-07T15:50:14","guid":{"rendered":"http:\/\/codermr.com\/?p=23"},"modified":"2023-03-22T23:45:08","modified_gmt":"2023-03-22T15:45:08","slug":"talkzk2","status":"publish","type":"post","link":"http:\/\/codermr.com\/index.php\/2022\/11\/07\/talkzk2\/","title":{"rendered":"\u804a\u804a\u300cZooKeeper\u300d\uff08\u4e0b\uff09"},"content":{"rendered":"\n

\u9605\u8bfb\u672c\u6587\u524d\uff0c\u8bf7\u5148\u9605\u8bfb\u6211\u7684\u6587\u7ae0  \u804a\u804a\u300c\u5206\u5e03\u5f0f\u7cfb\u7edf\u300d<\/a>\u548c \u804a\u804a\u300cZooKeeper\u300d\uff08\u4e0a\uff09<\/a>\u3002<\/p>\n\n\n\n

\u5728 \u804a\u804a\u300cZooKeeper\u300d\uff08\u4e0a\uff09<\/a> \u4e2d\u6211\u4e3e\u4e86\u4e00\u4e2a\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u5404\u4e2a\u8282\u70b9\u4fdd\u6301\u6570\u636e\u4e00\u81f4\u6027\u7684\u4f8b\u5b50\uff0c\u9488\u5bf9\u8fd9\u79cd\u573a\u666f\uff0c\u6211\u4eec\u770b\u770b ZooKeeper \u662f\u600e\u4e48\u505a\u7684\u3002<\/p>\n\n\n\n

\u5148\u770b\u770b ZooKeeper \u662f\u4ec0\u4e48<\/h2>\n\n\n\n
\n

ZooKeeper \u662f\u4e00\u4e2a\u5f00\u653e\u6e90\u4ee3\u7801\u7684\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1<\/mark>\uff0c\u7531\u77e5\u540d\u4e92\u8054\u7f51\u516c\u53f8\u96c5\u864e\u521b\u5efa\uff0c\u662fGoogle Chubby\u7684\u5f00\u6e90\u5b9e\u73b0\u3002ZooKeeper\u7684\u8bbe\u8ba1\u76ee\u6807<\/mark>\u662f\u5c06\u90a3\u4e9b\u590d\u6742\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\u7cfb\u5217\u7b80\u5355\u6613\u7528\u7684\u63a5\u53e3\u63d0\u4f9b\u7ed9\u7528\u6237\u4f7f\u7528<\/mark>\u3002ZooKeeper \u662f\u4e00\u4e2a\u5178\u578b\u7684\u5206\u5e03\u5f0f\u6570\u636e\u4e00\u81f4\u6027\u65b9\u6848<\/mark><\/strong>\u3002<\/p>\n<\/blockquote>\n\n\n\n

\n

ZooKeeper\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u6570\u636e\u4e00\u81f4\u6027\u89e3\u51b3\u65b9\u6848<\/mark><\/strong>\uff0c\u4e3a\u5206\u5e03\u5f0f\u5e94\u7528\u63d0\u4f9b\u4e00\u4e2a\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u7528<\/mark>\uff0c\u4e14\u5177\u6709\u4e25\u683c\u987a\u5e8f\u8bbf\u95ee\u63a7\u5236\u80fd\u529b<\/mark>\u7684\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1\u3002<\/p>\n\n\n\n

<\/p>\n<\/blockquote>\n\n\n\n

\u53ef\u4ee5\u770b\u5230\uff0c ZooKeeper \u662f\u4e00\u4e2a\u300e\u5206\u5e03\u5f0f\u6570\u636e\u4e00\u81f4\u6027\u89e3\u51b3\u65b9\u6848\u300f\u3002<\/em><\/mark><\/strong><\/p>\n

\u90a3\u4e48\u5177\u4f53\u6765\u8bf4\uff0cZooKeeper \u5230\u5e95\u53ef\u4ee5\u505a\u4ec0\u4e48\uff1f<\/h2>\n

\u5b83\u53ef\u4ee5\u4fdd\u8bc1\u5206\u5e03\u5f0f\u6570\u636e\u5177\u6709\u4ee5\u4e0b\u4e00\u81f4\u6027\uff1a<\/p><\/p>\n\n\n\n

\n
    \n
  1. \u987a\u5e8f\u4e00\u81f4\u6027<\/strong><\/li>\n\n\n\n
  2. \u539f\u5b50\u6027<\/strong><\/li>\n\n\n\n
  3. \u5355\u4e00\u89c6\u56fe\uff08Single System Image<\/strong>\uff09<\/li>\n\n\n\n
  4. \u53ef\u9760\u6027<\/strong><\/li>\n\n\n\n
  5. \u5b9e\u65f6\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n

     <\/p>\n\n\n\n

    1. \u987a\u5e8f\u4e00\u81f4\u6027<\/strong>
    \u4ece\u540c\u4e00\u4e2a\u5ba2\u6237\u7aef\u53d1\u8d77\u7684\u4e8b\u52a1\u8bf7\u6c42<\/span>\uff0c\u6700\u7ec8\u5c06\u4f1a\u4e25\u683c\u5730\u6309\u7167\u5176\u53d1\u8d77\u987a\u5e8f\u88ab\u5e94\u7528\u5230 ZooKeeper \u4e2d\u53bb\u3002<\/p>\n\n\n\n

    2. \u539f\u5b50\u6027<\/strong>
    \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\u4e5f\u5c31\u662f\u8bf4\uff0c\u8981\u4e48\u6574\u4e2a\u96c6\u7fa4\u6240\u6709\u673a\u5668\u90fd\u6210\u529f\u5e94\u7528\u4e86\u67d0\u4e00\u4e2a\u4e8b\u52a1\uff0c\u8981\u4e48\u90fd\u6ca1\u6709\u5e94\u7528\uff0c\u4e00\u5b9a\u4e0d\u4f1a\u51fa\u73b0\u96c6\u7fa4\u4e2d\u90e8\u5206\u673a\u5668\u5e94\u7528\u4e86\u8be5\u4e8b\u52a1\uff0c\u800c\u53e6\u5916\u4e00\u90e8\u5206\u6ca1\u6709\u5e94\u7528\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n

    3. \u5355\u4e00\u89c6\u56fe\uff08Single System Image\uff09<\/strong>
    \u65e0\u8bba\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u662f\u54ea\u4e2a ZooKeeper \u670d\u52a1\u5668\uff0c\u5176\u770b\u5230\u7684\u670d\u52a1\u7aef\u6570\u636e\u6a21\u578b\u90fd\u662f\u4e00\u81f4\u7684\u3002<\/p>\n\n\n\n

    4. \u53ef\u9760\u6027<\/strong>
    \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\u88ab\u4e00\u76f4\u4fdd\u7559\u4e0b\u6765\uff0c\u9664\u975e\u6709\u53e6\u4e00\u4e2a\u4e8b\u52a1\u53c8\u5bf9\u5176\u8fdb\u884c\u4e86\u53d8\u66f4\u3002<\/p>\n\n\n\n

    5. \u5b9e\u65f6\u6027<\/strong>
    \u901a\u5e38\u4eba\u4eec\u770b\u5230\u5b9e\u65f6\u6027\u7684\u7b2c\u4e00\u53cd\u5e94\u662f\uff0c\u4e00\u65e6\u4e00\u4e2a\u4e8b\u52a1\u88ab\u6210\u529f\u5e94\u7528\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u80fd\u591f\u7acb\u5373\u4ece\u670d\u52a1\u7aef\u4e0a\u8bfb\u53d6\u5230\u8fd9\u4e2a\u4e8b\u52a1\u53d8\u66f4\u540e\u7684\u6700\u65b0\u6570\u636e\u72b6\u6001\u3002\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cZooKeeper \u4ec5\u4ec5\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<\/mark>\u3002<\/p>\n<\/div><\/div>\n\n\n\n

    \n\n\n\n

    ZooKeeper \u7684\u8bbe\u8ba1\u76ee\u6807<\/h2>\n\n\n\n
      \n
    1. \u7b80\u5355\u6570\u636e\u6a21\u578b<\/strong><\/li>\n\n\n\n
    2. \u53ef\u4ee5\u6784\u5efa\u96c6\u7fa4<\/strong><\/li>\n\n\n\n
    3. \u987a\u5e8f\u8bbf\u95ee<\/strong><\/li>\n\n\n\n
    4. \u9ad8\u6027\u80fd<\/strong><\/li>\n<\/ol>\n\n\n\n
      \n

      \u00a0<\/p>

      1. \u7b80\u5355\u6570\u636e\u6a21\u578b<\/strong>
      ZooKeeper \u5c06\u5168\u91cf\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0cZooKeeper \u7684\u5185\u5b58\u6a21\u578b\u662f\u4e00\u4e2a\u6811\u5f62\u7ed3\u6784\u3002<\/p><\/p>\n\n\n\n

      2. \u53ef\u4ee5\u6784\u5efa\u96c6\u7fa4<\/strong>
      \u4e00\u822c\u7531 3-5 \u53f0\u673a\u5668\u5c31\u80fd\u7ec4\u6210\u4e00\u4e2a ZooKeeper \u96c6\u7fa4\uff0c\u96c6\u7fa4\u4e2d\u6bcf\u53f0\u673a\u5668\u4e4b\u95f4\u90fd\u4fdd\u6301\u901a\u4fe1<\/span>\u3002\u53ea\u8981\u96c6\u7fa4\u4e2d\u8d85\u8fc7\u4e00\u534a\u7684\u673a\u5668\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\uff0c\u6574\u4e2a ZooKeeper \u96c6\u7fa4\u5c31\u80fd\u6b63\u5e38\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u3002ZooKeeper \u5ba2\u6237\u7aef\u4f1a\u9009\u62e9\u548c ZooKeeper \u96c6\u7fa4\u4e2d\u4efb\u610f\u4e00\u53f0\u673a\u5668\u521b\u5efa\u4e00\u4e2a TCP \u8fde\u63a5\u3002<\/p>\n\n\n\n

      3. \u987a\u5e8f\u8bbf\u95ee<\/strong>
      \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\u5e8f\u53f7\uff0c\u8fd9\u4e2a\u5e8f\u53f7\u4ee3\u8868\u4e86\u6240\u6709\u4e8b\u52a1\u64cd\u4f5c\u7684\u5148\u540e\u987a\u5e8f\u3002<\/p>\n\n\n\n

      4. \u9ad8\u6027\u80fd<\/strong>
      ZooKeeper \u9002\u5408\u4ee5\u8bfb\u4e3a\u4e3b\u7684\u5e94\u7528\u573a\u666f\u3002\u7ecf\u6d4b\u8bd5 ZooKeeper \u7684\u8bfb\u6027\u80fd\u80fd\u8fbe\u5230 10\u4e07+ QPS\u3002<\/p>\n<\/div><\/div>\n\n\n\n

      \n\n\n\n

      ZooKeeper \u4e2d\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n\n\n\n

      1. \u96c6\u7fa4\u89d2\u8272<\/strong>
      Leader<\/span> \uff1aLeader \u670d\u52a1\u5668\u4e3a\u5ba2\u6237\u7aef\u63d0\u4f9b\u8bfb\u548c\u5199\u670d\u52a1\u3002
      Follower<\/span> \uff1aFollower \u670d\u52a1\u5668\u4e3a\u5ba2\u670d\u7aef\u63d0\u4f9b\u8bfb\u670d\u52a1\u3002\u53c2\u4e0e Leader \u9009\u4e3e\u3002
      Observer<\/span> \uff1aObserver \u670d\u52a1\u5668\u4e3a\u5ba2\u670d\u7aef\u63d0\u4f9b\u8bfb\u670d\u52a1\u3002\u4e0d\u53c2\u4e0e Leader \u9009\u4e3e\u3002<\/p>\n\n\n\n

      \n

      Follower\u53ca Observer \u7edf\u79f0 Learner\u3002Learner \u9700\u8981\u540c\u6b65 Leader \u7684\u6570\u636e\u3002Follower \u8fd8\u53c2\u4e0e\u9009\u4e3e\u53ca\u4e8b\u52a1\u51b3\u7b56\u8fc7\u7a0b\u3002<\/p>\n<\/blockquote>\n\n\n\n

      2. \u4f1a\u8bdd\uff08Seesion\uff09<\/strong>
      ZooKeeper \u5ba2\u6237\u7aef\u548c ZooKeeper \u670d\u52a1\u7aef\u7684\u4e00\u6b21\u4f1a\u8bdd\u3002<\/p>\n\n\n\n

      3. \u6570\u636e\u8282\u70b9\uff08ZNode\uff09<\/strong>
      \u6301\u4e45\u8282\u70b9<\/span>\uff1a<\/mark>\u521b\u5efa\u4e4b\u540e\u5c31\u4f1a\u4e00\u76f4\u5b58\u5728\uff0c\u9664\u975e\u7528\u6237\u4e3b\u52a8\u5220\u9664\u3002
      \u4e34\u65f6\u8282\u70b9<\/span>\uff1a<\/mark>\u4e34\u65f6\u8282\u70b9\u7684\u751f\u547d\u5468\u671f\u548c\u5ba2\u6237\u7aef\u4f1a\u8bdd\u7ed1\u5b9a\uff0c\u4f1a\u8bdd\u7ed3\u675f\uff0c\u5219\u4e34\u65f6\u8282\u70b9\u9500\u6bc1\u3002\u8be5\u8282\u70b9\u7684\u751f\u547d\u5468\u671f\u4f9d\u8d56\u4e8e\u521b\u5efa\u5b83\u4eec\u7684\u4f1a\u8bdd\u3002\u4e00\u65e6\u4f1a\u8bdd(Session)\u7ed3\u675f\uff0c\u4e34\u65f6\u8282\u70b9\u5c06\u88ab\u81ea\u52a8\u5220\u9664\uff0c\u5f53\u7136\u53ef\u4ee5\u4e5f\u53ef\u4ee5\u624b\u52a8\u5220\u9664\u3002\u867d\u7136\u6bcf\u4e2a\u4e34\u65f6\u7684Znode\u90fd\u4f1a\u7ed1\u5b9a\u5230\u4e00\u4e2a\u5ba2\u6237\u7aef\u4f1a\u8bdd\uff0c\u4f46\u4ed6\u4eec\u5bf9\u6240\u6709\u7684\u5ba2\u6237\u7aef\u8fd8\u662f\u53ef\u89c1\u7684\u3002\u53e6\u5916\uff0cZooKeeper \u7684\u4e34\u65f6\u8282\u70b9\u4e0d\u5141\u8bb8\u62e5\u6709\u5b50\u8282\u70b9\u3002<\/p>\n\n\n\n

      4. \u7248\u672c<\/strong>
      ZooKeeper \u7684\u6bcf\u4e2a ZNode \u4e0a\u90fd\u4f1a\u5b58\u50a8\u6570\u636e\uff0c\u5bf9\u5e94\u4e8e\u6bcf\u4e2a ZNode \uff0cZooKeeper \u90fd\u4f1a\u4e3a\u5176\u7ef4\u62a4\u4e00\u4e2a\u53eb\u4f5c Stat \u7684\u6570\u636e\u7ed3\u6784\uff0cStat \u4e2d\u8bb0\u5f55\u4e86\u8fd9\u4e2a ZNode \u7684\u4e09\u4e2a\u6570\u636e\u7248\u672c\uff0c\u5206\u522b\u662f version (\u5f53\u524d ZNode \u7684\u7248\u672c)\u3001cversion (\uff08\u5f53\u524d ZNode \u5b50\u8282\u70b9\u7684\u7248\u672c)\u548c aversion (\u5f53\u524d ZNode \u7684 ACL \u7248\u672c)\u3002<\/p>\n\n\n\n

      5. Watcher<\/strong>
      Watcher\uff08\u4e8b\u4ef6\u76d1\u542c\u5668\uff09\uff0c\u662f ZooKeeper \u4e2d\u7684\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u7279\u6027\u3002ZooKeeper \u5141\u8bb8\u7528\u6237\u5728\u6307\u5b9a\u8282\u70b9\u4e0a\u6ce8\u518c\u4e00\u4e9b Watcher \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\u4e0a\u53bb\uff0c\u8be5\u673a\u5236\u662f ZooKeeper \u5b9e\u73b0\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1\u7684\u91cd\u8981\u7279\u6027\u3002<\/p>\n\n\n\n

      6. ACL<\/strong>
      ZooKeeper \u91c7\u7528 ACL(Access Control Lists) \u7b56\u7565\u6765\u8fdb\u884c\u6743\u9650\u63a7\u5236\u3002<\/p>\n\n\n\n

      \n\n\n

      ZAB \u534f\u8bae<\/h2>\n

      ZAB \u534f\u8bae\u662f\u4e00\u4e2a\u300e\u539f\u5b50\u5e7f\u64ad\u534f\u8bae\u300f\uff0c\u5168\u79f0\u662f\u201cZookeeper Atomic Broadcast\u201d\uff0c\u662f\u4e3a Zookeeper \u6240\u4e13\u95e8\u8bbe\u8ba1\u7684\u4e00\u79cd\u652f\u6301\u5d29\u6e83\u6062\u590d\u7684\u539f\u5b50\u5e7f\u64ad\u534f\u8bae\u3002ZAB \u534f\u8bae\u5e76\u4e0d\u50cf Paxos \u7b97\u6cd5\u90a3\u6837\u662f\u4e00\u79cd\u901a\u7528\u7684\u5206\u5e03\u5f0f\u4e00\u81f4\u6027\u7b97\u6cd5\uff0c\u800c\u662f\u4e13\u4e3a Zookeeper \u6240\u8bbe\u8ba1\u7684\u3002<\/span><\/p>\n\n\n

      \n

      \u5728 ZooKeeper \u4e2d\uff0c\u4e3b\u8981\u4f9d\u8d56 ZAB \u534f\u8bae\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u6570\u636e\u4e00\u81f4\u6027\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\u6570\u636e\u7684\u4e00\u81f4\u6027\u3002\u5177\u4f53\u6765\u8bf4\uff0cZooKeeper \u4f7f\u7528\u4e00\u4e2a\u5355\u4e00\u7684\u4e3b\u8fdb\u7a0b\u6765\u63a5\u6536\u5e76\u5904\u7406\u5ba2\u6237\u7aef\u7684\u6240\u6709\u4e8b\u52a1\u8bf7\u6c42<\/mark>\uff0c\u5e76\u91c7\u7528 ZAB \u7684\u539f\u5b50\u5e7f\u64ad\u534f\u8bae\uff0c\u5c06\u670d\u52a1\u5668\u6570\u636e<\/strong>\u7684\u72b6\u6001\u53d8\u66f4<\/mark>\u4ee5\u4e8b\u52a1 Proposal \u7684\u5f62\u5f0f\u5e7f\u64ad\u5230\u6240\u6709\u7684\u526f\u672c\u8fdb\u7a0b\u4e0a\u53bb\u3002<\/p>\n\n\n\n

      ZAB \u534f\u8bae\u7684\u8fd9\u4e2a\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<\/mark>\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u8003\u8651\u5230\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\uff0c\u987a\u5e8f\u6267\u884c\u7684\u4e00\u4e9b\u72b6\u6001\u53d8\u66f4\u5176\u524d\u540e\u4f1a\u5b58\u5728\u4e00\u5b9a\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u6709\u4e9b\u72b6\u6001\u53d8\u66f4\u5fc5\u987b\u4f9d\u8d56\u4e8e\u6bd4\u5b83\u65e9\u751f\u6210\u7684\u90a3\u4e9b\u72b6\u6001\u53d8\u66f4\uff0c\u4f8b\u5982\u53d8\u66f4 C \u9700\u8981\u4f9d\u8d56\u53d8\u66f4 A \u548c\u53d8\u66f4 B\u3002\u8fd9\u6837\u7684\u4f9d\u8d56\u5173\u7cfb\u4e5f\u5bf9 ZAB \u534f\u8bae\u63d0\u51fa\u4e86\u4e00\u4e2a\u8981\u6c42\uff1aZAB \u534f\u8bae\u5fc5\u987b\u80fd\u591f\u4fdd\u8bc1\u4e00\u4e2a\u5168\u5c40\u7684\u53d8\u66f4\u5e8f\u5217\u88ab\u987a\u5e8f\u5e94\u7528<\/mark>\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0cZAB \u534f\u8bae\u9700\u8981\u4fdd\u8bc1\u5982\u679c\u4e00\u4e2a\u72b6\u6001\u53d8\u66f4\u5df2\u7ecf\u88ab\u5904\u7406\u4e86\uff0c\u90a3\u4e48\u6240\u6709\u5176\u4f9d\u8d56\u7684\u72b6\u6001\u53d8\u66f4\u90fd\u5e94\u8be5\u5df2\u7ecf\u88ab\u63d0\u524d\u5904\u7406\u6389\u4e86\u3002\u6700\u540e\uff0c\u8003\u8651\u5230\u4e3b\u8fdb\u7a0b\u5728\u4efb\u4f55\u65f6\u5019\u90fd\u6709\u53ef\u80fd\u51fa\u73b0\u5d29\u6e83\u9000\u51fa\u6216\u91cd\u542f\u73b0\u8c61\uff0c\u56e0\u6b64\uff0cZAB \u534f\u8bae\u8fd8\u9700\u8981\u505a\u5230\u5728\u5f53\u524d\u4e3b\u8fdb\u7a0b\u51fa\u73b0\u4e0a\u8ff0\u5f02\u5e38\u60c5\u51b5\u7684\u65f6\u5019\uff0c\u4f9d\u65e7\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<\/blockquote>\n\n\n\n

      \n

      \u6240\u6709\u4e8b\u52a1\u8bf7\u6c42\u5fc5\u987b\u7531\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u7684\u670d\u52a1\u5668\u6765\u534f\u8c03\u5904\u7406\uff0c\u8fd9\u6837\u7684\u670d\u52a1\u5668\u88ab\u79f0\u4e3a Leader \u670d\u52a1\u5668\uff0c\u800c\u4f59\u4e0b\u7684\u5176\u4ed6\u670d\u52a1\u5668\u5219\u6210\u4e3a Follower \u670d\u52a1\u5668\u3002<\/p>\n\n\n\n

      Leader \u670d\u52a1\u5668\u8d1f\u8d23\u5c06\u4e00\u4e2a\u5ba2\u6237\u7aef\u4e8b\u52a1\u8bf7\u6c42\u8f6c\u6362\u6210\u4e00\u4e2a\u4e8b\u52a1 Proposal\uff08\u63d0\u8bae\uff09\uff0c\u5e76\u5c06\u8be5 Proposal \u5206\u53d1\u7ed9\u96c6\u7fa4\u4e2d\u6240\u6709\u7684 Follower \u670d\u52a1\u5668\u3002\u4e4b\u540e Leader \u670d\u52a1\u5668\u9700\u8981\u7b49\u5f85\u6240\u6709 Follower \u670d\u52a1\u5668\u7684\u53cd\u9988\uff0c\u4e00\u65e6\u8d85\u8fc7\u534a\u6570\u7684 Follower \u670d\u52a1\u5668\u8fdb\u884c\u4e86\u6b63\u786e\u7684\u53cd\u9988\u540e\uff0c\u90a3\u4e48 Leader \u5c31\u4f1a\u518d\u6b21\u5411\u6240\u6709\u7684 Follower \u670d\u52a1\u5668\u5206\u53d1 Commit \u6d88\u606f\uff0c\u8981\u6c42\u5176\u5c06\u524d\u4e00\u4e2a Proposal \u8fdb\u884c\u63d0\u4ea4\u3002<\/p>\n<\/blockquote>\n\n\n\n

      ZAB \u534f\u8bae\u5305\u62ec\u4e24\u79cd\u57fa\u672c\u7684\u6a21\u5f0f\uff1a\u5d29\u6e83\u6062\u590d\u6a21\u5f0f<\/strong> \u548c \u6d88\u606f\u5e7f\u64ad\u6a21\u5f0f<\/strong>\u3002<\/p>\n\n\n\n

      \u5d29\u6e83\u6062\u590d\u6a21\u5f0f<\/strong><\/span><\/p>\n\n\n\n

      \n

      \u5728 ZooKeeper \u96c6\u7fa4\u5728\u542f\u52a8\u8fc7\u7a0b\u4e2d\uff0c\u6216\u8005 Leader \u670d\u52a1\u5668\u51fa\u73b0\u7f51\u7edc\u4e2d\u65ad\u3001\u5d29\u6e83\u63a8\u51fa\u3001\u91cd\u542f\u7b49\u5f02\u5e38\u60c5\u51b5\uff0cZAB \u534f\u8bae\u5c31\u4f1a\u8fdb\u5165\u300e\u5d29\u6e83\u6062\u590d\u6a21\u5f0f\u300f\u5e76\u9009\u4e3e\u51fa\u65b0\u7684 Leader \u670d\u52a1\u5668\u3002\u5f53\u9009\u4e3e\u51fa\u4e86\u65b0\u7684 Leader \u670d\u52a1\u5668\uff0c\u540c\u65f6\u96c6\u7fa4\u4e2d\u5df2\u7ecf\u6709\u8fc7\u534a\u7684\u673a\u5668\u4e0e\u8be5 Leader \u670d\u52a1\u5668\u5b8c\u6210\u4e86\u72b6\u6001\u540c\u6b65\u4e4b\u540e\uff0cZAB \u534f\u8bae\u5c31\u4f1a\u9000\u51fa\u6062\u590d\u6a21\u5f0f\u3002\u5176\u4e2d\uff0c\u6240\u8c13\u7684\u72b6\u6001\u540c\u6b65<\/strong>\u662f\u6307\u6570\u636e\u540c\u6b65<\/strong>\uff0c\u7528\u6765\u4fdd\u8bc1\u96c6\u7fa4\u4e2d\u5b58\u5728\u8fc7\u534a\u7684\u673a\u5668\u80fd\u591f\u548c Leader \u670d\u52a1\u5668\u7684\u6570\u636e\u72b6\u6001\u4fdd\u6301\u4e00\u81f4\u3002<\/p>\n<\/blockquote>\n\n\n\n

      \n

      \u7b80\u8a00\u4e4b\uff0c\u300c\u5d29\u6e83\u6062\u590d\u6a21\u5f0f\u300d\u76ee\u7684\u662f\u201c\u9009\u51fa\u65b0\u7684 Leader \u201d\u4ee5\u53ca\u201c\u9009\u51fa\u65b0 Leader \u540e\u96c6\u7fa4\u72b6\u6001\u540c\u6b65\u201d\u3002<\/strong><\/em><\/p>\n<\/blockquote>\n\n\n\n

      \u6d88\u606f\u5e7f\u64ad\u6a21\u5f0f<\/strong><\/span><\/p>\n\n\n\n

      \n

      \u5f53\u96c6\u7fa4\u4e2d\u5df2\u7ecf\u6709\u8fc7\u534a\u7684 Follower \u670d\u52a1\u5668\u5b8c\u6210\u4e86\u548c Leader \u670d\u52a1\u5668\u7684\u72b6\u6001\u540c\u6b65\uff0c\u90a3\u4e48\u6574\u4e2a\u670d\u52a1\u6846\u67b6\u5c31\u53ef\u4ee5\u8fdb\u5165\u300e\u6d88\u606f\u5e7f\u64ad\u6a21\u5f0f\u300f\u4e86\u3002\u5f53\u4e00\u53f0\u540c\u6837\u9075\u5b88 ZAB \u534f\u8bae\u7684\u670d\u52a1\u5668\u542f\u52a8\u540e\u52a0\u5165\u5230\u96c6\u7fa4\u4e2d\u65f6\uff0c\u5982\u679c\u6b64\u65f6\u96c6\u7fa4\u4e2d\u5df2\u7ecf\u5b58\u5728\u4e00\u4e2a Leader \u670d\u52a1\u5668\u5728\u8d1f\u8d23\u8fdb\u884c\u6d88\u606f\u5e7f\u64ad\uff0c\u90a3\u4e48\u65b0\u52a0\u5165\u7684\u670d\u52a1\u5668\u5c31\u4f1a\u81ea\u89c9\u5730\u8fdb\u5165\u6570\u636e\u6062\u590d\u6a21\u5f0f\uff1a\u627e\u5230 Leader \u6240\u5728\u7684\u670d\u52a1\u5668\uff0c\u5e76\u4e0e\u5176\u8fdb\u884c\u6570\u636e\u540c\u6b65\uff0c\u7136\u540e\u4e00\u8d77\u53c2\u4e0e\u5230\u6d88\u606f\u5e7f\u64ad\u6d41\u7a0b\u4e2d\u53bb\u3002\u6b63\u5982\u4e0a\u6587\u4ecb\u7ecd\u4e2d\u6240\u8bf4\u7684\uff0cZooKeeper \u8bbe\u8ba1\u6210\u53ea\u5141\u8bb8\u552f\u4e00\u7684\u4e00\u4e2a Leader \u670d\u52a1\u5668\u6765\u8fdb\u884c\u4e8b\u52a1\u8bf7\u6c42\u7684\u5904\u7406\u3002Leader \u670d\u52a1\u5668\u5728\u63a5\u6536\u5230\u5ba2\u6237\u7aef\u7684\u4e8b\u52a1\u8bf7\u6c42\u540e\uff0c\u4f1a\u751f\u6210\u5bf9\u5e94\u7684\u4e8b\u52a1\u63d0\u6848\u5e76\u53d1\u8d77\u4e00\u8f6e\u5e7f\u64ad\u534f\u8bae\uff1b\u800c\u5982\u679c\u96c6\u7fa4\u4e2d\u7684\u5176\u4ed6\u673a\u5668\u63a5\u6536\u5230\u5ba2\u6237\u7aef\u7684\u4e8b\u52a1\u8bf7\u6c42\uff0c\u90a3\u4e48\u8fd9\u4e9b\u975e Leader \u670d\u52a1\u5668\u4f1a\u9996\u5148\u5c06\u8fd9\u4e2a\u4e8b\u52a1\u8bf7\u6c42\u8f6c\u53d1\u7ed9 Leader \u670d\u52a1\u5668<\/mark>\u3002<\/p>\n\n\n\n

      ZAB \u534f\u8bae\u7684\u6d88\u606f\u5e7f\u64ad\u8fc7\u7a0b\u4f7f\u7528\u7684\u662f\u4e00\u4e2a\u539f\u5b50\u5e7f\u64ad\u534f\u8bae\uff0c\u7c7b\u4f3c\u4e8e\u4e00\u4e2a\u4e8c\u9636\u6bb5\u63d0\u4ea4\u8fc7\u7a0b\u3002\u9488\u5bf9\u5ba2\u6237\u7aef\u7684\u4e8b\u52a1\u8bf7\u6c42\uff0c Leader \u670d\u52a1\u5668\u4f1a\u4e3a\u5176\u751f\u6210\u5bf9\u5e94\u7684\u4e8b\u52a1 Proposal\uff0c\u5e76\u5c06\u5176\u53d1\u9001\u7ed9\u96c6\u7fa4\u4e2d\u5176\u4f59\u6240\u6709\u7684\u673a\u5668\uff0c\u7136\u540e\u518d\u5206\u522b\u6536\u96c6\u5404\u81ea\u7684\u9009\u7968\uff0c\u6700\u540e\u8fdb\u884c\u4e8b\u52a1\u63d0\u4ea4<\/mark>\u3002\u5728 ZAB \u534f\u8bae\u7684\u4e8c\u9636\u6bb5\u63d0\u4ea4\u8fc7\u7a0b\u4e2d\uff0c\u6240\u6709\u7684 Follower \u670d\u52a1\u5668\u8981\u4e48\u6b63\u5e38\u53cd\u9988 Leader \u63d0\u51fa\u7684\u4e8b\u52a1 Proposal \uff0c\u8981\u4e48\u5c31\u629b\u5f03 Leader \u670d\u52a1\u5668\u3002\u540c\u65f6\uff0cZAB \u534f\u8bae\u5c06\u4e8c\u9636\u6bb5\u63d0\u4ea4\u4e2d\u7684\u4e2d\u65ad\u903b\u8f91\u79fb\u9664\u610f\u5473\u7740\u6211\u4eec\u53ef\u4ee5\u5728\u8fc7\u534a\u7684 Follower \u670d\u52a1\u5668\u5df2\u7ecf\u53cd\u9988 Ack \u4e4b\u540e\u5c31\u5f00\u59cb\u63d0\u4ea4\u4e8b\u52a1 Proposal \u4e86\uff0c\u800c\u4e0d\u9700\u8981\u7b49\u5f85\u96c6\u7fa4\u4e2d\u6240\u6709\u7684 Follower \u670d\u52a1\u5668\u90fd\u53cd\u9988\u54cd\u5e94\u3002\u5f53\u7136\uff0c\u5728\u8fd9\u79cd\u7b80\u5316\u4e86\u7684\u4e8c\u9636\u6bb5\u63d0\u4ea4\u6a21\u578b\u4e0b\uff0c\u662f\u65e0\u6cd5\u5904\u7406 Leader \u670d\u52a1\u5668\u5d29\u6e83\u9000\u51fa\u800c\u5e26\u6765\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u95ee\u9898\u7684\uff0c\u56e0\u6b64\u5728 ZAB \u534f\u8bae\u4e2d\u6dfb\u52a0\u4e86\u53e6\u4e00\u4e2a\u6a21\u5f0f\uff0c\u5373\u91c7\u7528\u5d29\u6e83\u6062\u590d\u6a21\u5f0f\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u53e6\u5916\uff0c\u6574\u4e2a\u6d88\u606f\u5e7f\u64ad\u534f\u8bae\u662f\u57fa\u4e8e\u5177\u6709 FIFO \u7279\u6027\u7684 TCP \u534f\u8bae\u6765\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u7684\uff0c\u56e0\u6b64\u80fd\u591f\u5f88\u5bb9\u6613\u5730\u4fdd\u8bc1\u6d88\u606f\u5e7f\u64ad\u8fc7\u7a0b\u4e2d\u6d88\u606f\u63a5\u6536\u4e0e\u53d1\u9001\u7684\u987a\u5e8f\u6027<\/mark>\u3002<\/p>\n\n\n\n

      \u5728\u6574\u4e2a\u6d88\u606f\u5e7f\u64ad\u8fc7\u7a0b\u4e2d\uff0cLeader \u670d\u52a1\u5668\u4f1a\u4e3a\u6bcf\u4e2a\u4e8b\u52a1\u8bf7\u6c42\u751f\u6210\u5bf9\u5e94\u7684 Proposal \u6765\u8fdb\u884c\u5e7f\u64ad\uff0c\u5e76\u4e14\u5728\u5e7f\u64ad\u4e8b\u52a1 Proposal \u4e4b\u524d\uff0cLeader \u670d\u52a1\u5668\u4f1a\u9996\u5148\u4e3a\u8fd9\u4e2a\u4e8b\u52a1 Proposal \u5206\u914d\u4e00\u4e2a\u5168\u5c40\u5355\u8c03\u9012\u589e\u7684\u552f\u4e00 ID\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u4e8b\u52a1 ID (\u5373 ZXID )\u3002\u7531\u4e8e ZAB \u534f\u8bae\u9700\u8981\u4fdd\u8bc1\u6bcf\u4e00\u4e2a\u6d88\u606f\u4e25\u683c\u7684\u56e0\u679c\u5173\u7cfb\uff0c\u56e0\u6b64\u5fc5\u987b\u5c06\u6bcf\u4e00\u4e2a\u4e8b\u52a1 Proposal \u6309\u7167\u5176 ZXID \u7684\u5148\u540e\u987a\u5e8f\u6765\u8fdb\u884c\u6392\u5e8f\u4e0e\u5904\u7406<\/mark><\/strong>\u3002<\/p>\n\n\n\n

      \u5177\u4f53\u7684\uff0c\u5728\u6d88\u606f\u5e7f\u64ad\u8fc7\u7a0b\u4e2d\uff0cLeader \u670d\u52a1\u5668\u4f1a\u4e3a\u6bcf\u4e00\u4e2a Follower \u670d\u52a1\u5668\u90fd\u5404\u81ea\u5206\u914d\u4e00\u4e2a\u5355\u72ec\u7684\u961f\u5217\uff0c\u7136\u540e\u5c06\u9700\u8981\u5e7f\u64ad\u7684\u4e8b\u52a1 Proposal \u4f9d\u6b21\u653e\u5165\u8fd9\u4e9b\u961f\u5217\u4e2d\u53bb\uff0c\u5e76\u4e14\u6839\u636e FIFO \u7b56\u7565\u8fdb\u884c\u6d88\u606f\u53d1\u9001\u3002<\/mark>\u6bcf\u4e00\u4e2a Follower \u670d\u52a1\u5668\u5728\u63a5\u6536\u5230\u8fd9\u4e2a\u4e8b\u52a1 Proposal \u4e4b\u540e\uff0c\u90fd\u4f1a\u9996\u5148\u5c06\u5176\u4ee5\u4e8b\u52a1\u65e5\u5fd7\u7684\u5f62\u5f0f\u5199\u4eba\u5230\u672c\u5730\u78c1\u76d8\u4e2d\u53bb\uff0c\u5e76\u4e14\u5728\u6210\u529f\u5199\u5165\u540e\u53cd\u9988\u7ed9 Leader \u670d\u52a1\u5668\u4e00\u4e2a Ack \u54cd\u5e94\u3002\u5f53 Leader \u670d\u52a1\u5668\u63a5\u6536\u5230\u8d85\u8fc7\u534a\u6570 Follower \u7684 Ack \u54cd\u5e94\u540e\uff0c\u5c31\u4f1a\u5e7f\u64ad\u4e00\u4e2a Commit \u6d88\u606f\u7ed9\u6240\u6709\u7684 Follower \u670d\u52a1\u5668\u4ee5\u901a\u77e5\u5176\u8fdb\u884c\u4e8b\u52a1\u63d0\u4ea4\uff0c\u540c\u65f6 Leader \u81ea\u8eab\u4e5f\u4f1a\u5b8c\u6210\u5bf9\u4e8b\u52a1\u7684\u63d0\u4ea4\uff0c\u800c\u6bcf\u4e00\u4e2a Follower \u670d\u52a1\u5668\u5728\u63a5\u6536\u5230 Commit \u6d88\u606f\u540e\uff0c\u4e5f\u4f1a\u5b8c\u6210\u5bf9\u4e8b\u52a1\u7684\u63d0\u4ea4\u3002<\/p>\n<\/blockquote>\n\n\n\n

      \n

      \u7b80\u8a00\u4e4b\uff0c\u300c\u6d88\u606f\u5e7f\u64ad\u6a21\u5f0f\u300d\u5c31\u662f Leader \u628a\u6570\u636e\u540c\u6b65\u7ed9\u5404\u4e2a Follower\u3002 <\/em><\/strong><\/p>\n<\/blockquote>\n\n\n\n

      Leader \u4f1a\u5904\u7406\u6240\u6709\u4e8b\u52a1\u8bf7\u6c42\uff0c\u5982\u679c Follower \u63a5\u6536\u5230\u4e8b\u52a1\u8bf7\u6c42\u4f1a\u8f6c\u53d1\u7ed9 Leader \u5904\u7406\u3002Leader \u4f1a\u5bf9\u6bcf\u4e2a\u4e8b\u52a1\u8bf7\u6c42\u751f\u6210\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u9012\u589e\u7684\u4e8b\u52a1 ID \uff08ZXID\uff09\uff0c\u5e76\u6309\u7167\u4e8b\u52a1 ID \u7684\u5148\u540e\u987a\u5e8f\u5904\u7406\u4e8b\u52a1\u3002Leader \u4f1a\u4e3a\u6bcf\u4e2a Follower \u5404\u81ea\u5206\u914d\u4e00\u4e2a FIFO \u961f\u5217\uff0c\u5c06\u8981\u5e7f\u64ad\u7ed9\u5404\u4e2a Follower \u7684\u4e8b\u52a1\u653e\u8fdb\u8fd9\u4e2a FIFO \u961f\u5217\u4e2d\u53d1\u9001\uff0c\u8fd9\u6837\u5c31\u80fd\u4fdd\u8bc1\u5404\u4e2a Follower \u63a5\u6536\u4e8b\u52a1\u6570\u636e\u7684\u987a\u5e8f\u548c Leader \u5904\u7406\u4e8b\u52a1\u6570\u636e\u7684\u987a\u5e8f\u662f\u4e00\u6837\u7684\u3002\u6bcf\u4e2a Follower \u63a5\u6536\u5230 Leader \u53d1\u9001\u6765\u7684\u4e8b\u52a1\u6570\u636e\uff0c\u4f1a\u5148\u5230\u81ea\u5df1\u78c1\u76d8\u4e0a\u7684\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u4e2d\uff0c\u6210\u529f\u5199\u5165\u540e Ack \u7ed9 Leader \u4e00\u4e2a\u54cd\u5e94\uff0cLeader \u6536\u5230\u8fc7\u534a\u6570 Follower \u7684\u54cd\u5e94\u5c31\u5f00\u59cb\u5e7f\u64ad Commit \u6d88\u606f\u5e76\u63d0\u4ea4\u4e8b\u52a1\uff0c\u6bcf\u4e2a Follower \u63a5\u6536\u5230 Leader \u7684 Commit \u6d88\u606f\u5c31\u5f00\u59cb\u63d0\u4ea4\u4e8b\u52a1\u3002<\/mark><\/p>\n\n\n\n

      \n

      ZAB\u534f\u8bae\u9700\u8981\u786e\u4fdd\u90a3\u4e9b\u300c\u5df2\u7ecf\u5728 Leader \u670d\u52a1\u5668\u4e0a\u63d0\u4ea4\u7684\u4e8b\u52a1\u300d\u6700\u7ec8\u88ab\u6240\u6709\u670d\u52a1\u5668\u90fd\u63d0\u4ea4\u3002<\/p>\n<\/blockquote>\n\n\n\n

      \u5047\u8bbe\u4e00\u4e2a\u4e8b\u52a1\u5728 Leader \u670d\u52a1\u5668\u4e0a\u88ab\u63d0\u4ea4\u4e86\uff0c\u5e76\u4e14\u5df2\u7ecf\u5f97\u5230\u8fc7\u534a Follower \u670d\u52a1\u5668\u7684 Ack \u53cd\u9988\uff0c\u4f46\u662f\u5728\u5b83\u5c06 Commit \u6d88\u606f\u53d1\u9001\u7ed9\u6240\u6709 Follower \u673a\u5668\u4e4b\u524d\uff0cLeader \u670d\u52a1\u5668\u6302\u4e86\u3002<\/p>\n\n\n\n

      \"\"<\/figure>\n\n\n\n

      \u5982\u4e0a\u56fe\uff0cServer1 \u662f Leader \u670d\u52a1\u5668\uff0c\u5176\u5148\u540e\u5e7f\u64ad\u4e86\u6d88\u606f Pl\u3001P2\u3001C1\u3001P3 \u548c C2\uff0c\u5176\u4e2d\uff0c\u5f53 Leader \u670d\u52a1\u5668\u5c06\u6d88\u606f C2\uff08C2 \u662f Commit Of Proposal2 \u7684\u7f29\u5199\uff0c\u5373\u63d0\u4ea4\u4e8b\u52a1 Proposal2\uff09\u53d1\u51fa\u540e\u5c31\u7acb\u5373\u5d29\u6e83\u9000\u51fa\u4e86\u3002\u9488\u5bf9\u8fd9\u79cd\u60c5\u51b5\uff0c ZAB \u534f\u8bae\u5c31\u9700\u8981\u786e\u4fdd\u4e8b\u52a1 Proposal2 \u6700\u7ec8\u80fd\u591f\u5728\u6240\u6709\u7684\u670d\u52a1\u5668\u4e0a\u90fd\u88ab\u63d0\u4ea4\u6210\u529f\uff0c\u5426\u5219\u5c06\u51fa\u73b0\u4e0d\u4e00\u81f4\u3002<\/p>\n\n\n\n

      \n

      ZAB \u534f\u8bae\u9700\u8981\u786e\u4fdd\u4e22\u5f03\u90a3\u4e9b\u53ea\u5728 Leader \u670d\u52a1\u5668\u4e0a\u88ab\u63d0\u51fa\u7684\u4e8b\u52a1\u3002<\/p>\n<\/blockquote>\n\n\n\n

      \"\"<\/figure>\n\n\n\n

      \u5982\u4e0a\u56fe\u6240\u793a\uff0c\u5047\u8bbe\u521d\u59cb\u7684 Leader \u670d\u52a1\u5668 Server1 \u5728\u63d0\u51fa\u4e86\u4e00\u4e2a\u4e8b\u52a1 Proposal3 \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\u52a1 Proposal\u3002\u4e8e\u662f\uff0c\u5f53 Server1 \u6062\u590d\u8fc7\u6765\u518d\u6b21\u52a0\u5165\u5230\u96c6\u7fa4\u4e2d\u7684\u65f6\u5019\uff0cZAB \u534f\u8bae\u9700\u8981\u786e\u4fdd\u4e22\u5f03 Proposal3 \u8fd9\u4e2a\u4e8b\u52a1\u3002<\/p>\n\n\n\n

      \u603b\u7ed3\u4e00\u4e0b\u5c31\u662f\uff1a\u80fd\u591f\u786e\u4fdd\u63d0\u4ea4\u5df2\u7ecf\u88ab Leader \u63d0\u4ea4\u7684\u4e8b\u52a1 Proposal\uff0c\u540c\u65f6\u4e22\u5f03\u5df2\u7ecf\u88ab\u8df3\u8fc7\u7684\u4e8b\u52a1Proposal\u3002<\/p>\n\n\n\n

      \u7b80\u8a00\u4e4b\uff0c\u5982\u679c\u4e00\u4e2a\u4e8b\u52a1\u7ecf\u8fc7\u4e86\u6295\u7968\u3001Ack \u7136\u540e\u5df2\u7ecf\u88ab Leader \u63d0\u4ea4\uff0c\u5219\u5fc5\u987b\u4fdd\u8bc1\u8be5\u4e8b\u52a1\u5728\u96c6\u7fa4\u4e2d\u6bcf\u4e2a\u673a\u5668\u4e0a\u90fd\u63d0\u4ea4\uff08\u5373\u4f7f Leader \u63d0\u4ea4\u4e4b\u540e\u96c6\u7fa4\u5d29\u6e83\u6ca1\u6709\u5e7f\u64ad Commit \u6d88\u606f\uff09\uff1b\u800c\u5982\u679c\u4e00\u4e2a\u4e8b\u52a1\u6ca1\u6709\u7ecf\u8fc7\u6295\u7968\u6216\u8005\u7ecf\u8fc7\u6295\u7968\u4f46 Leader \u8fd8\u6ca1\u6709\u63d0\u4ea4\uff08\u4e0d\u7ba1\u5982\u4f55\u603b\u4e4b\u5c31\u662f\u8be5\u4e8b\u52a1 Leader \u6ca1\u6709\u63d0\u4ea4\uff09\uff0c\u5219\u8be5\u4e8b\u52a1\u5fc5\u987b\u88ab\u4e22\u5f03\/\u8df3\u8fc7\u3002<\/em><\/strong><\/p>\n\n\n\n

      \n\n\n\n

      ZooKeeper \u9009\u4e3b\uff08Leader\uff09\u8fc7\u7a0b<\/h2>\n\n\n\n

      \u9009\u4e3b\u9636\u6bb5\uff0c\u96c6\u7fa4\u95f4\u4e92\u4f20\u7684\u6d88\u606f\u79f0\u4e3a\u6295\u7968\uff0c\u6295\u7968Vote\u4e3b\u8981\u5305\u62ec\u4e8c\u4e2a\u7ef4\u5ea6\u7684\u4fe1\u606f\uff1aID\u3001ZXID \uff1a<\/strong>
      \uff081\uff09ID \u662f\u88ab\u63a8\u4e3e\u7684 Leader \u7684\u670d\u52a1\u5668 ID\uff0c\u96c6\u7fa4\u4e2d\u7684\u6bcf\u4e2a zk \u8282\u70b9\u542f\u52a8\u524d\u5c31\u8981\u914d\u7f6e\u597d\u8fd9\u4e2a\u5168\u5c40\u552f\u4e00\u7684 ID\u3002
      \uff082\uff09ZXID \u662f\u88ab\u63a8\u4e3e\u7684 Leader \u7684\u4e8b\u52a1ID \uff0c\u8be5\u503c\u662f\u4ece\u673a\u5668 DataTree \u5185\u5b58\u4e2d\u53d6\u7684\uff0c\u5373\u4e8b\u52a1\u5df2\u7ecf\u5728\u673a\u5668\u4e0a\u88ab commit \u8fc7\u4e86\uff08\u6ce8\u610f ZXID \u7684\u524d 32 \u4f4d\u4ee3\u8868\u9009\u4e3e\u5468\u671f\uff0c\u540e 32 \u4f4d\u662f\u4e00\u4e2a\u9012\u589e\u5e8f\u5217\u503c\uff09\u3002<\/p>\n\n\n\n

      \u8282\u70b9\u8fdb\u5165\u9009\u4e3e\u9636\u6bb5\u540e\u7684\u5927\u4f53\u6267\u884c\u903b\u8f91\u5982\u4e0b\uff1a<\/strong>
      \uff081\uff09\u8bbe\u7f6e\u72b6\u6001\u4e3aLOOKING\uff0c\u521d\u59cb\u5316\u5185\u90e8\u6295\u7968Vote (id,zxid) \u6570\u636e\u81f3\u5185\u5b58\uff0c\u5e76\u5c06\u5176\u5e7f\u64ad\u5230\u96c6\u7fa4\u5176\u5b83\u8282\u70b9\u3002\u8282\u70b9\u9996\u6b21\u6295\u7968\u90fd\u662f\u9009\u4e3e\u81ea\u5df1\u4f5c\u4e3a Leader \uff0c\u5c06\u81ea\u8eab\u7684\u670d\u52a1ID\u3001\u5904\u7406\u7684\u6700\u8fd1\u4e00\u4e2a\u4e8b\u52a1\u8bf7\u6c42\u7684ZXID\uff08ZXID\u662f\u4ece\u5185\u5b58\u6570\u636e\u5e93\u91cc\u53d6\u7684\uff0c\u5373\u8be5\u8282\u70b9\u6700\u8fd1\u4e00\u4e2a\u5b8c\u6210 commit \u7684\u4e8b\u52a1 id \uff09\u53ca\u5f53\u524d\u72b6\u6001\u5e7f\u64ad\u51fa\u53bb\u3002\u7136\u540e\u8fdb\u5165\u5faa\u73af\u7b49\u5f85\u53ca\u5904\u7406\u5176\u5b83\u8282\u70b9\u7684\u6295\u7968\u4fe1\u606f\u7684\u6d41\u7a0b\u4e2d\u3002
      \uff082\uff09\u5faa\u73af\u7b49\u5f85\u6d41\u7a0b\u4e2d\uff0c\u8282\u70b9\u6bcf\u6536\u5230\u4e00\u4e2a\u5916\u90e8\u7684 Vote \u4fe1\u606f\uff0c\u90fd\u9700\u8981\u5c06\u5176\u4e0e\u81ea\u5df1\u5185\u5b58 Vote \u6570\u636e\u8fdb\u884cPK\uff0c\u89c4\u5219\u4e3a\u53d6 ZXID \u5927\u7684\uff0c\u82e5 ZXID \u76f8\u7b49\uff0c\u5219\u53d6 ID \u5927\u7684\u90a3\u4e2a\u6295\u7968\u3002\u82e5\u5916\u90e8\u6295\u7968\u80dc\u9009\uff0c\u8282\u70b9\u9700\u8981\u5c06\u8be5\u9009\u7968\u8986\u76d6\u4e4b\u524d\u7684\u5185\u5b58 Vote \u6570\u636e\uff0c\u5e76\u518d\u6b21\u5e7f\u64ad\u51fa\u53bb\uff1b\u540c\u65f6\u8fd8\u8981\u7edf\u8ba1\u662f\u5426\u6709\u8fc7\u534a\u7684\u8d5e\u540c\u8005\u4e0e\u65b0\u7684\u5185\u5b58\u6295\u7968\u6570\u636e\u4e00\u81f4\uff0c\u65e0\u5219\u7ee7\u7eed\u5faa\u73af\u7b49\u5f85\u65b0\u7684\u6295\u7968\uff0c\u6709\u5219\u9700\u8981\u5224\u65ad Leader \u662f\u5426\u5728\u8d5e\u540c\u8005\u4e4b\u4e2d\uff0c\u5728\u5219\u9000\u51fa\u5faa\u73af\uff0c\u9009\u4e3e\u7ed3\u675f\uff0c\u6839\u636e\u9009\u4e3e\u7ed3\u679c\u53ca\u5404\u81ea\u89d2\u8272\u5207\u6362\u72b6\u6001\uff0c Leader \u5207\u6362\u6210 LEADING\u3001Follower \u5207\u6362\u5230 FOLLOWING\u3001Observer \u5207\u6362\u5230 OBSERVING \u72b6\u6001\u3002<\/p>\n\n\n\n

      \u6570\u636e\u540c\u6b65<\/strong><\/h2>\n\n\n\n
      \n

      \u5b8c\u6210 Leader \u9009\u4e3e\u4e4b\u540e\uff0c\u5728\u6b63\u5f0f\u5f00\u59cb\u5de5\u4f5c(\u5373\u63a5\u6536\u5ba2\u6237\u7aef\u7684\u4e8b\u52a1\u8bf7\u6c42\uff0c\u7136\u540e\u63d0\u51fa\u65b0\u7684\u63d0\u6848)\u4e4b\u524d\uff0cLeader \u670d\u52a1\u5668\u4f1a\u9996\u5148\u786e\u8ba4\u4e8b\u52a1\u65e5\u5fd7\u4e2d\u7684\u6240\u6709 Proposal \u662f\u5426\u90fd\u5df2\u7ecf\u88ab\u96c6\u7fa4\u4e2d\u8fc7\u534a\u7684\u673a\u5668\u63d0\u4ea4\u4e86\uff0c\u5373\u662f\u5426\u5b8c\u6210\u6570\u636e\u540c\u6b65\u3002<\/mark>\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u770b\u770b ZAB \u534f\u8bae\u7684\u6570\u636e\u540c\u6b65\u8fc7\u7a0b\u3002\u6240\u6709\u6b63\u5e38\u8fd0\u884c\u7684\u670d\u52a1\u5668\uff0c\u8981\u4e48\u6210\u4e3a Leader\uff0c\u8981\u4e48\u6210\u4e3a Follower \u5e76\u548c Leader \u4fdd\u6301\u540c\u6b65\u3002
      Leader \u670d\u52a1\u5668\u9700\u8981\u786e\u4fdd\u6240\u6709<\/mark><\/strong>\u7684 Follower \u670d\u52a1\u5668\u80fd\u591f\u63a5\u6536\u5230\u6bcf\u4e00\u6761\u4e8b\u52a1 Proposal\uff0c\u5e76\u4e14\u80fd\u591f\u6b63\u786e\u5730\u5c06\u6240\u6709\u5df2\u7ecf\u63d0\u4ea4\u4e86\u7684\u4e8b\u52a1 Proposal \u5e94\u7528\u5230\u5185\u5b58\u6570\u636e\u5e93\u4e2d\u53bb\u3002\u5177\u4f53\u7684\uff0cLeader \u670d\u52a1\u5668\u4f1a\u4e3a\u6bcf\u4e00\u4e2a Follower \u670d\u52a1\u5668\u90fd\u51c6\u5907\u4e00\u4e2a\u961f\u5217\uff0c\u5e76\u5c06\u90a3\u4e9b\u6ca1\u6709\u88ab\u5404 Follower \u670d\u52a1\u5668\u540c\u6b65\u7684\u4e8b\u52a1\u4ee5 Proposal \u6d88\u606f\u7684\u5f62\u5f0f\u9010\u4e2a\u53d1\u9001\u7ed9 Follower \u670d\u52a1\u5668\uff0c\u5e76\u5728\u6bcf\u4e00\u4e2a Proposal \u6d88\u606f\u540e\u9762\u7d27\u63a5\u7740\u518d\u53d1\u9001\u4e00\u4e2a Commit \u6d88\u606f\uff0c\u4ee5\u8868\u793a\u8be5\u4e8b\u52a1\u5df2\u7ecf\u88ab\u63d0\u4ea4\u3002\u7b49\u5230 Follower \u670d\u52a1\u5668\u5c06\u6240\u6709\u5176\u5c1a\u672a\u540c\u6b65\u7684\u4e8b\u52a1 Proposal \u90fd\u4ece Leader \u670d\u52a1\u5668\u4e0a\u540c\u6b65\u8fc7\u6765\u5e76\u6210\u529f\u5e94\u7528\u5230\u672c\u5730\u6570\u636e\u5e93\u4e2d\u540e\uff0cLeader \u670d\u52a1\u5668\u5c31\u4f1a\u5c06\u8be5 Follower \u670d\u52a1\u5668\u52a0\u5165\u5230\u771f\u6b63\u7684\u53ef\u7528 Follower \u5217\u8868\u4e2d\uff0c\u5e76\u5f00\u59cb\u4e4b\u540e\u7684\u5176\u4ed6\u6d41\u7a0b\u3002<\/p>\n\n\n\n


      \u4e0a\u9762\u8bb2\u5230\u7684\u662f\u6b63\u5e38\u60c5\u51b5\u4e0b\u7684\u6570\u636e\u540c\u6b65\u903b\u8f91\uff0c\u4e0b\u9762\u6765\u770b ZAB \u534f\u8bae\u662f\u5982\u4f55\u5904\u7406\u90a3\u4e9b\u9700\u8981\u88ab\u4e22\u5f03\u7684\u4e8b\u52a1 Proposal \u7684\u3002\u5728 ZAB \u534f\u8bae\u7684\u4e8b\u52a1\u7f16\u53f7 ZXID \u8bbe\u8ba1\u4e2d\uff0cZXID \u662f\u4e00\u4e2a 64 \u4f4d\u7684\u6570\u5b57<\/mark>\uff0c\u5176\u4e2d\u4f4e 32 \u4f4d\u53ef\u4ee5\u770b\u4f5c\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\u52a1 Proposal \u7684\u65f6\u5019\uff0c\u90fd\u4f1a\u5bf9\u8be5\u8ba1\u6570\u5668\u8fdb\u884c\u52a0l\u64cd\u4f5c<\/mark>\uff1b\u800c\u9ad8 32 \u4f4d\u5219\u4ee3\u8868\u4e86 Leader \u5468\u671f epoch \u7684\u7f16\u53f7<\/mark>\uff0c\u6bcf\u5f53\u9009\u4e3e\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684 Leader \u670d\u52a1\u5668\uff0c\u5c31\u4f1a\u4ece\u8fd9\u4e2a Leader \u670d\u52a1\u5668\u4e0a\u53d6\u51fa\u5176\u672c\u5730\u65e5\u5fd7\u4e2d\u6700\u5927\u4e8b\u52a1 Proposal \u7684 ZXID\uff0c\u5e76\u4ece\u8be5 ZXID \u4e2d\u89e3\u6790\u51fa\u5bf9\u5e94\u7684 epoch \u503c\uff0c\u7136\u540e\u518d\u5bf9\u5176\u8fdb\u884c\u52a01\u64cd\u4f5c\uff0c\u4e4b\u540e\u5c31\u4f1a\u4ee5\u6b64\u7f16\u53f7\u4f5c\u4e3a\u65b0\u7684 epoch\uff0c\u5e76\u5c06\u4f4e 32 \u4f4d\u7f6e 0 \u6765\u5f00\u59cb\u751f\u6210\u65b0\u7684ZXID\u3002ZAB \u534f\u8bae\u4e2d\u7684\u8fd9\u4e00\u901a\u8fc7 epoch \u7f16\u53f7\u6765\u533a\u5206 Leader \u5468\u671f\u53d8\u5316\u7684\u7b56\u7565\uff0c\u80fd\u591f\u6709\u6548\u5730\u907f\u514d\u4e0d\u540c\u7684 Leader \u670d\u52a1\u5668\u9519\u8bef\u5730\u4f7f\u7528\u76f8\u540c\u7684 ZXID \u7f16\u53f7\u63d0\u51fa\u4e0d\u4e00\u6837\u7684\u4e8b\u52a1 Proposal \u7684\u5f02\u5e38\u60c5\u51b5\uff0c\u8fd9\u5bf9\u4e8e\u8bc6\u522b\u5728 Leader \u5d29\u6e83\u6062\u590d\u524d\u540e\u751f\u6210\u7684 Proposal \u975e\u5e38\u6709\u5e2e\u52a9\uff0c\u5927\u5927\u7b80\u5316\u548c\u63d0\u5347\u4e86\u6570\u636e\u6062\u590d\u6d41\u7a0b\u3002
      \u57fa\u4e8e\u8fd9\u6837\u7684\u7b56\u7565\uff0c\u5f53\u4e00\u4e2a\u5305\u542b\u4e86\u4e0a\u4e00\u4e2a Leader \u5468\u671f\u4e2d\u5c1a\u672a\u63d0\u4ea4\u8fc7\u7684\u4e8b\u52a1 Proposal \u7684\u670d\u52a1\u5668\u542f\u52a8\u65f6\uff0c\u5176\u80af\u5b9a\u65e0\u6cd5\u6210\u4e3a Leader\uff0c\u539f\u56e0\u5f88\u7b80\u5355\uff0c\u56e0\u4e3a\u5f53\u524d\u96c6\u7fa4\u4e2d\u4e00\u5b9a\u5305\u542b\u4e00\u4e2a Quorum \u96c6\u5408\uff0c\u8be5\u96c6\u5408\u4e2d\u7684\u673a\u5668\u4e00\u5b9a\u5305\u542b\u4e86\u66f4\u9ad8 epoch \u7684\u4e8b\u52a1 Proposal\uff0c\u56e0\u6b64\u8fd9\u53f0\u673a\u5668\u7684\u4e8b\u52a1 Proposal \u80af\u5b9a\u4e0d\u662f\u6700\u9ad8\uff0c\u4e5f\u5c31\u65e0\u6cd5\u6210\u4e3a Leader \u4e86\u3002\u5f53\u8fd9\u53f0\u673a\u5668\u52a0\u5165\u5230\u96c6\u7fa4\u4e2d\uff0c\u4ee5 Follower \u89d2\u8272\u8fde\u63a5\u4e0a Leader \u670d\u52a1\u5668\u4e4b\u540e\uff0cLeader \u670d\u52a1\u5668\u4f1a\u6839\u636e\u81ea\u5df1\u670d\u52a1\u5668\u4e0a\u6700\u540e\u88ab\u63d0\u4ea4\u7684 Proposal \u6765\u548c Follower \u670d\u52a1\u5668\u7684 Proposal \u8fdb\u884c\u6bd4\u5bf9\uff0c\u6bd4\u5bf9\u7684\u7ed3\u679c\u5f53\u7136\u662f Leader \u4f1a\u8981\u6c42 Follower \u8fdb\u884c\u4e00\u4e2a\u56de\u9000\u64cd\u4f5c\u4e00\u56de\u9000\u5230\u4e00\u4e2a\u786e\u5b9e\u5df2\u7ecf\u88ab\u96c6\u7fa4\u4e2d\u8fc7\u534a\u673a\u5668\u63d0\u4ea4\u7684\u6700\u65b0\u7684\u4e8b\u52a1 Proposal\u3002<\/p>\n<\/blockquote>\n\n\n\n

      \n\n\n\n

      \u7ec3\u4e60\u9898<\/h1>\n\n\n\n

      zk \u96c6\u7fa4\u4e2d\u90fd\u6709\u54ea\u4e9b\u89d2\u8272\uff1f\u90fd\u662f\u4ec0\u4e48\u4f5c\u7528\uff1f
      zk \u96c6\u7fa4\u4ec0\u4e48\u60c5\u51b5\u4e0b\u9700\u8981\u9009\u4e3b\uff1f
      zk \u96c6\u7fa4\u9009\u4e3b\u7684\u8fc7\u7a0b\u662f\u600e\u6837\u7684\uff1f
      zk \u96c6\u7fa4\u542f\u52a8\u7684\u8fc7\u7a0b\u662f\u600e\u6837\u7684\uff1f
      zk \u96c6\u7fa4\u4e2d Leader \u6302\u6389\u540e\uff0czk \u96c6\u7fa4\u4f1a\u600e\u4e48\u505a\uff1f
      zk \u96c6\u7fa4\u5199\u5165\u4e00\u4e2a\u503c\u7684\u8fc7\u7a0b\u662f\u600e\u6837\u7684\uff1f\uff08\u5373 zk \u4e00\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u7684\u8fc7\u7a0b\u662f\u600e\u6837\u7684\uff09
      zk \u96c6\u7fa4\u7684 Leader\u8282\u70b9\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f
      \u5ba2\u6237\u7aef\u914d\u7f6e\u8fde\u63a5 zk \u96c6\u7fa4\u540e\uff0c\u5ba2\u6237\u7aef\u662f\u548c\u51e0\u4e2a zk \u8282\u70b9\u8fde\u63a5\u7684\uff1f
      \u5565\u65f6\u5019 zk \u96c6\u7fa4\u4f1a\u8fdb\u884c\u9009\u4e3b\uff1f
      zk \u96c6\u7fa4\u91cc\u6295\u7968\u53eb\u505a\u5565\u610f\u601d\uff1f
      \u9009\u4e3b\u540e zk \u96c6\u7fa4\u7684\u6570\u636e\u540c\u6b65\u662f\u600e\u6837\u7684\u8fc7\u7a0b\uff1f
      zk \u91cc\u9762\u7684\u4e8b\u52a1\u662f\u4ec0\u4e48\u610f\u601d\uff1f
      zk \u91cc\u9762\u7684\u6295\u7968\u662f\u4ec0\u4e48\u610f\u601d\uff1f
      zk \u4e2d\u7684\u4e8b\u52a1\u65e5\u5fd7\u662f\u4ec0\u4e48\u610f\u601d\uff1f
      zk \u4e2d\u7684\u8fc7\u534a\u539f\u5219\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/p>\n\n\n\n

      \u5b8c\u3002<\/h1>\n","protected":false},"excerpt":{"rendered":"

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