{"id":819,"date":"2018-07-20T08:34:09","date_gmt":"2018-07-20T00:34:09","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=819"},"modified":"2018-07-20T08:34:09","modified_gmt":"2018-07-20T00:34:09","slug":"%e3%80%90%e5%88%86%e5%b8%83%e5%bc%8f%e3%80%91zookeeper%e6%9c%8d%e5%8a%a1%e7%ab%af%e5%90%af%e5%8a%a8","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=819","title":{"rendered":"\u3010\u5206\u5e03\u5f0f\u3011Zookeeper\u670d\u52a1\u7aef\u542f\u52a8"},"content":{"rendered":"

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

\u524d\u9762\u5df2\u7ecf\u4e86\u89e3\u4e86Zookeeper\u4f1a\u8bdd\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u63a5\u7740\u6765\u5b66\u4e60Zookeeper\u670d\u52a1\u7aef\u76f8\u5173\u7ec6\u8282\u3002<\/p>\n

\u4e8c\u3001\u670d\u52a1\u7aef<\/strong><\/p>\n

\u670d\u52a1\u7aef\u6574\u4f53\u67b6\u6784\u5982\u4e0b<\/p>\n

\"\"<\/p>\n

Zookeeper\u670d\u52a1\u5668\u7684\u542f\u52a8\uff0c\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u4e94\u4e2a\u6b65\u9aa4<\/p>\n

1. \u914d\u7f6e\u6587\u4ef6\u89e3\u6790\u3002<\/p>\n

2. \u521d\u59cb\u5316\u6570\u636e\u7ba1\u7406\u5668\u3002<\/p>\n

3. \u521d\u59cb\u5316\u7f51\u7edcI\/O\u7ba1\u7406\u5668\u3002<\/p>\n

4. \u6570\u636e\u6062\u590d\u3002<\/p>\n

5. \u5bf9\u5916\u670d\u52a1\u3002<\/p>\n

2.1 \u5355\u673a\u7248\u670d\u52a1\u5668\u542f\u52a8<\/p>\n

\u5355\u673a\u7248\u670d\u52a1\u5668\u7684\u542f\u52a8\u5176\u6d41\u7a0b\u56fe\u5982\u4e0b<\/p>\n

\"\"<\/p>\n

\u4e0a\u56fe\u7684\u8fc7\u7a0b\u53ef\u4ee5\u5206\u4e3a\u9884\u542f\u52a8<\/strong>\u548c\u521d\u59cb\u5316<\/strong>\u8fc7\u7a0b\u3002<\/p>\n

1. \u9884\u542f\u52a8<\/strong><\/p>\n

1. \u7edf\u4e00\u7531QuorumPeerMain\u4f5c\u4e3a\u542f\u52a8\u7c7b\u3002\u65e0\u8bba\u5355\u673a\u6216\u96c6\u7fa4\uff0c\u5728zkServer.cmd\u548czkServer.sh\u4e2d\u90fd\u914d\u7f6e\u4e86QuorumPeerMain\u4f5c\u4e3a\u542f\u52a8\u5165\u53e3\u7c7b\u3002<\/p>\n

2. \u89e3\u6790\u914d\u7f6e\u6587\u4ef6zoo.cfg\u3002zoo.cfg\u914d\u7f6e\u8fd0\u884c\u65f6\u7684\u57fa\u672c\u53c2\u6570\uff0c\u5982tickTime\u3001dataDir\u3001clientPort\u7b49\u53c2\u6570\u3002<\/p>\n

3. \u521b\u5efa\u5e76\u542f\u52a8\u5386\u53f2\u6587\u4ef6\u6e05\u7406\u5668DatadirCleanupManager\u3002\u5bf9\u4e8b\u52a1\u65e5\u5fd7\u548c\u5feb\u7167\u6570\u636e\u6587\u4ef6\u8fdb\u884c\u5b9a\u65f6\u6e05\u7406\u3002<\/p>\n

4. \u5224\u65ad\u5f53\u524d\u662f\u96c6\u7fa4\u6a21\u5f0f\u8fd8\u662f\u5355\u673a\u6a21\u5f0f\u542f\u52a8\u3002\u82e5\u662f\u5355\u673a\u6a21\u5f0f\uff0c\u5219\u59d4\u6258\u7ed9ZooKeeperServerMain\u8fdb\u884c\u542f\u52a8\u3002<\/p>\n

5. \u518d\u6b21\u8fdb\u884c\u914d\u7f6e\u6587\u4ef6zoo.cfg\u7684\u89e3\u6790\u3002<\/p>\n

6. \u521b\u5efa\u670d\u52a1\u5668\u5b9e\u4f8bZooKeeperServer\u3002Zookeeper\u670d\u52a1\u5668\u9996\u5148\u4f1a\u8fdb\u884c\u670d\u52a1\u5668\u5b9e\u4f8b\u7684\u521b\u5efa\uff0c\u7136\u540e\u5bf9\u8be5\u670d\u52a1\u5668\u5b9e\u4f8b\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u5305\u62ec\u8fde\u63a5\u5668\u3001\u5185\u5b58\u6570\u636e\u5e93\u3001\u8bf7\u6c42\u5904\u7406\u5668\u7b49\u7ec4\u4ef6\u7684\u521d\u59cb\u5316\u3002<\/p>\n

2. \u521d\u59cb\u5316<\/strong><\/p>\n

1. \u521b\u5efa\u670d\u52a1\u5668\u7edf\u8ba1\u5668ServerStats\u3002ServerStats\u662fZookeeper\u670d\u52a1\u5668\u8fd0\u884c\u65f6\u7684\u7edf\u8ba1\u5668\u3002<\/p>\n

2. \u521b\u5efaZookeeper\u6570\u636e\u7ba1\u7406\u5668FileTxnSnapLog\u3002FileTxnSnapLog\u662fZookeeper\u4e0a\u5c42\u670d\u52a1\u5668\u548c\u5e95\u5c42\u6570\u636e\u5b58\u50a8\u4e4b\u95f4\u7684\u5bf9\u63a5\u5c42\uff0c\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u64cd\u4f5c\u6570\u636e\u6587\u4ef6\u7684\u63a5\u53e3\uff0c\u5982\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u548c\u5feb\u7167\u6570\u636e\u6587\u4ef6\u3002Zookeeper\u6839\u636ezoo.cfg\u6587\u4ef6\u4e2d\u89e3\u6790\u51fa\u7684\u5feb\u7167\u6570\u636e\u76ee\u5f55dataDir\u548c\u4e8b\u52a1\u65e5\u5fd7\u76ee\u5f55dataLogDir\u6765\u521b\u5efaFileTxnSnapLog\u3002<\/p>\n

3. \u8bbe\u7f6e\u670d\u52a1\u5668tickTime\u548c\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u9650\u5236\u3002<\/p>\n

4. \u521b\u5efaServerCnxnFactory\u3002\u901a\u8fc7\u914d\u7f6e\u7cfb\u7edf\u5c5e\u6027zookeper.serverCnxnFactory\u6765\u6307\u5b9a\u4f7f\u7528Zookeeper\u81ea\u5df1\u5b9e\u73b0\u7684NIO\u8fd8\u662f\u4f7f\u7528Netty\u6846\u67b6\u4f5c\u4e3aZookeeper\u670d\u52a1\u7aef\u7f51\u7edc\u8fde\u63a5\u5de5\u5382\u3002<\/p>\n

5. \u521d\u59cb\u5316ServerCnxnFactory\u3002Zookeeper\u4f1a\u521d\u59cb\u5316Thread\u4f5c\u4e3aServerCnxnFactory\u7684\u4e3b\u7ebf\u7a0b\uff0c\u7136\u540e\u518d\u521d\u59cb\u5316NIO\u670d\u52a1\u5668\u3002<\/p>\n

6. \u542f\u52a8ServerCnxnFactory\u4e3b\u7ebf\u7a0b\u3002\u8fdb\u5165Thread\u7684run\u65b9\u6cd5\uff0c\u6b64\u65f6\u670d\u52a1\u7aef\u8fd8\u4e0d\u80fd\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002<\/p>\n

7. \u6062\u590d\u672c\u5730\u6570\u636e\u3002\u542f\u52a8\u65f6\uff0c\u9700\u8981\u4ece\u672c\u5730\u5feb\u7167\u6570\u636e\u6587\u4ef6\u548c\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u8fdb\u884c\u6570\u636e\u6062\u590d\u3002<\/p>\n

8. \u521b\u5efa\u5e76\u542f\u52a8\u4f1a\u8bdd\u7ba1\u7406\u5668\u3002Zookeeper\u4f1a\u521b\u5efa\u4f1a\u8bdd\u7ba1\u7406\u5668SessionTracker\u8fdb\u884c\u4f1a\u8bdd\u7ba1\u7406\u3002<\/p>\n

9. \u521d\u59cb\u5316Zookeeper\u7684\u8bf7\u6c42\u5904\u7406\u94fe\u3002Zookeeper\u8bf7\u6c42\u5904\u7406\u65b9\u5f0f\u4e3a\u8d23\u4efb\u94fe\u6a21\u5f0f\u7684\u5b9e\u73b0\u3002\u4f1a\u6709\u591a\u4e2a\u8bf7\u6c42\u5904\u7406\u5668\u4f9d\u6b21\u5904\u7406\u4e00\u4e2a\u5ba2\u6237\u7aef\u8bf7\u6c42\uff0c\u5728\u670d\u52a1\u5668\u542f\u52a8\u65f6\uff0c\u4f1a\u5c06\u8fd9\u4e9b\u8bf7\u6c42\u5904\u7406\u5668\u4e32\u8054\u6210\u4e00\u4e2a\u8bf7\u6c42\u5904\u7406\u94fe\u3002<\/p>\n

10. \u6ce8\u518cJMX\u670d\u52a1\u3002Zookeeper\u4f1a\u5c06\u670d\u52a1\u5668\u8fd0\u884c\u65f6\u7684\u4e00\u4e9b\u4fe1\u606f\u4ee5JMX\u7684\u65b9\u5f0f\u66b4\u9732\u7ed9\u5916\u90e8\u3002<\/p>\n

11.\u00a0\u6ce8\u518cZookeeper\u670d\u52a1\u5668\u5b9e\u4f8b\u3002\u5c06Zookeeper\u670d\u52a1\u5668\u5b9e\u4f8b\u6ce8\u518c\u7ed9ServerCnxnFactory\uff0c\u4e4b\u540eZookeeper\u5c31\u53ef\u4ee5\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n

\u81f3\u6b64\uff0c\u5355\u673a\u7248\u7684Zookeeper\u670d\u52a1\u5668\u542f\u52a8\u5b8c\u6bd5\u3002<\/p>\n

2.2 \u96c6\u7fa4\u670d\u52a1\u5668\u542f\u52a8<\/p>\n

\u5355\u673a\u548c\u96c6\u7fa4\u670d\u52a1\u5668\u7684\u542f\u52a8\u5728\u5f88\u591a\u5730\u65b9\u662f\u4e00\u81f4\u7684\uff0c\u5176\u6d41\u7a0b\u56fe\u5982\u4e0b<\/p>\n

\"\"<\/p>\n

\u4e0a\u56fe\u7684\u8fc7\u7a0b\u53ef\u4ee5\u5206\u4e3a\u9884\u542f\u52a8\u3001\u521d\u59cb\u5316\u3001Leader\u9009\u4e3e\u3001Leader\u4e0eFollower\u542f\u52a8\u671f\u4ea4\u4e92\u8fc7\u7a0b\u3001Leader\u4e0eFollower\u542f\u52a8<\/strong>\u7b49\u8fc7\u7a0b\u3002<\/p>\n

1. \u9884\u542f\u52a8<\/strong><\/p>\n

1. \u7edf\u4e00\u7531QuorumPeerMain\u4f5c\u4e3a\u542f\u52a8\u7c7b\u3002<\/p>\n

2. \u89e3\u6790\u914d\u7f6e\u6587\u4ef6zoo.cfg\u3002<\/p>\n

3. \u521b\u5efa\u5e76\u542f\u52a8\u5386\u53f2\u6587\u4ef6\u6e05\u7406\u5668DatadirCleanupFactory\u3002<\/p>\n

4. \u5224\u65ad\u5f53\u524d\u662f\u96c6\u7fa4\u6a21\u5f0f\u8fd8\u662f\u5355\u673a\u6a21\u5f0f\u7684\u542f\u52a8\u3002\u5728\u96c6\u7fa4\u6a21\u5f0f\u4e2d\uff0c\u5728zoo.cfg\u6587\u4ef6\u4e2d\u914d\u7f6e\u4e86\u591a\u4e2a\u670d\u52a1\u5668\u5730\u5740\uff0c\u53ef\u4ee5\u9009\u62e9\u96c6\u7fa4\u542f\u52a8\u3002<\/p>\n

2. \u521d\u59cb\u5316<\/strong><\/p>\n

1. \u521b\u5efaServerCnxnFactory\u3002<\/p>\n

2. \u521d\u59cb\u5316ServerCnxnFactory\u3002<\/p>\n

3. \u521b\u5efaZookeeper\u6570\u636e\u7ba1\u7406\u5668FileTxnSnapLog\u3002<\/p>\n

4. \u521b\u5efaQuorumPeer\u5b9e\u4f8b\u3002Quorum\u662f\u96c6\u7fa4\u6a21\u5f0f\u4e0b\u7279\u6709\u7684\u5bf9\u8c61\uff0c\u662fZookeeper\u670d\u52a1\u5668\u5b9e\u4f8b\uff08ZooKeeperServer\uff09\u7684\u6258\u7ba1\u8005\uff0cQuorumPeer\u4ee3\u8868\u4e86\u96c6\u7fa4\u4e2d\u7684\u4e00\u53f0\u673a\u5668\uff0c\u5728\u8fd0\u884c\u671f\u95f4\uff0cQuorumPeer\u4f1a\u4e0d\u65ad\u68c0\u6d4b\u5f53\u524d\u670d\u52a1\u5668\u5b9e\u4f8b\u7684\u8fd0\u884c\u72b6\u6001\uff0c\u540c\u65f6\u6839\u636e\u60c5\u51b5\u53d1\u8d77Leader\u9009\u4e3e\u3002<\/p>\n

5. \u521b\u5efa\u5185\u5b58\u6570\u636e\u5e93ZKDatabase\u3002ZKDatabase\u8d1f\u8d23\u7ba1\u7406ZooKeeper\u7684\u6240\u6709\u4f1a\u8bdd\u8bb0\u5f55\u4ee5\u53caDataTree\u548c\u4e8b\u52a1\u65e5\u5fd7\u7684\u5b58\u50a8\u3002<\/p>\n

6. \u521d\u59cb\u5316QuorumPeer\u3002\u5c06\u6838\u5fc3\u7ec4\u4ef6\u5982FileTxnSnapLog\u3001ServerCnxnFactory\u3001ZKDatabase\u6ce8\u518c\u5230QuorumPeer\u4e2d\uff0c\u540c\u65f6\u914d\u7f6eQuorumPeer\u7684\u53c2\u6570\uff0c\u5982\u670d\u52a1\u5668\u5217\u8868\u5730\u5740\u3001Leader\u9009\u4e3e\u7b97\u6cd5\u548c\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u9650\u5236\u7b49\u3002<\/p>\n

7. \u6062\u590d\u672c\u5730\u6570\u636e\u3002<\/p>\n

8. \u542f\u52a8ServerCnxnFactory\u4e3b\u7ebf\u7a0b\u3002<\/p>\n

\u30003. Leader\u9009\u4e3e<\/strong><\/p>\n

1. \u521d\u59cb\u5316Leader\u9009\u4e3e\u3002\u96c6\u7fa4\u6a21\u5f0f\u7279\u6709\uff0cZookeeper\u9996\u5148\u4f1a\u6839\u636e\u81ea\u8eab\u7684\u670d\u52a1\u5668ID\uff08SID\uff09\u3001\u6700\u65b0\u7684ZXID\uff08lastLoggedZxid\uff09\u548c\u5f53\u524d\u7684\u670d\u52a1\u5668epoch\uff08currentEpoch\uff09\u6765\u751f\u6210\u4e00\u4e2a\u521d\u59cb\u5316\u6295\u7968\uff0c\u5728\u521d\u59cb\u5316\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u4e2a\u670d\u52a1\u5668\u90fd\u4f1a\u7ed9\u81ea\u5df1\u6295\u7968\u3002\u7136\u540e\uff0c\u6839\u636ezoo.cfg\u7684\u914d\u7f6e\uff0c\u521b\u5efa\u76f8\u5e94Leader\u9009\u4e3e\u7b97\u6cd5\u5b9e\u73b0\uff0cZookeeper\u63d0\u4f9b\u4e86\u4e09\u79cd\u9ed8\u8ba4\u7b97\u6cd5\uff08LeaderElection\u3001AuthFastLeaderElection\u3001FastLeaderElection\uff09\uff0c\u53ef\u901a\u8fc7zoo.cfg\u4e2d\u7684electionAlg\u5c5e\u6027\u6765\u6307\u5b9a\uff0c\u4f46\u73b0\u53ea\u652f\u6301FastLeaderElection\u9009\u4e3e\u7b97\u6cd5\u3002\u5728\u521d\u59cb\u5316\u9636\u6bb5\uff0cZookeeper\u4f1a\u521b\u5efaLeader\u9009\u4e3e\u6240\u9700\u7684\u7f51\u7edcI\/O\u5c42QuorumCnxManager\uff0c\u540c\u65f6\u542f\u52a8\u5bf9Leader\u9009\u4e3e\u7aef\u53e3\u7684\u76d1\u542c\uff0c\u7b49\u5f85\u96c6\u7fa4\u4e2d\u5176\u4ed6\u670d\u52a1\u5668\u521b\u5efa\u8fde\u63a5\u3002<\/p>\n

2. \u6ce8\u518cJMX\u670d\u52a1\u3002<\/p>\n

3. \u68c0\u6d4b\u5f53\u524d\u670d\u52a1\u5668\u72b6\u6001\u3002\u8fd0\u884c\u671f\u95f4\uff0cQuorumPeer\u4f1a\u4e0d\u65ad\u68c0\u6d4b\u5f53\u524d\u670d\u52a1\u5668\u72b6\u6001\u3002\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0cZookeeper\u670d\u52a1\u5668\u7684\u72b6\u6001\u5728LOOKING\u3001LEADING\u3001FOLLOWING\/OBSERVING\u4e4b\u95f4\u8fdb\u884c\u5207\u6362\u3002\u5728\u542f\u52a8\u9636\u6bb5\uff0cQuorumPeer\u7684\u521d\u59cb\u72b6\u6001\u662fLOOKING\uff0c\u56e0\u6b64\u5f00\u59cb\u8fdb\u884cLeader\u9009\u4e3e\u3002<\/p>\n

4. Leader\u9009\u4e3e\u3002\u901a\u8fc7\u6295\u7968\u786e\u5b9aLeader\uff0c\u5176\u4f59\u673a\u5668\u79f0\u4e3aFollower\u548cObserver\u3002\u5177\u4f53\u7b97\u6cd5\u5728\u540e\u9762\u4f1a\u7ed9\u51fa\u3002<\/p>\n

4. Leader\u548cFollower\u542f\u52a8\u671f\u4ea4\u4e92\u8fc7\u7a0b<\/strong><\/p>\n

1. \u521b\u5efaLeader\u670d\u52a1\u5668\u548cFollower\u670d\u52a1\u5668\u3002\u5b8c\u6210Leader\u9009\u4e3e\u540e\uff0c\u6bcf\u4e2a\u670d\u52a1\u5668\u4f1a\u6839\u636e\u81ea\u5df1\u670d\u52a1\u5668\u7684\u89d2\u8272\u521b\u5efa\u76f8\u5e94\u7684\u670d\u52a1\u5668\u5b9e\u4f8b\uff0c\u5e76\u8fdb\u5165\u5404\u81ea\u89d2\u8272\u7684\u4e3b\u6d41\u7a0b\u3002<\/p>\n

2. Leader\u670d\u52a1\u5668\u542f\u52a8Follower\u63a5\u6536\u5668LearnerCnxAcceptor\u3002\u8fd0\u884c\u671f\u95f4\uff0cLeader\u670d\u52a1\u5668\u9700\u8981\u548c\u6240\u6709\u5176\u4f59\u7684\u670d\u52a1\u5668\uff08\u7edf\u79f0\u4e3aLearner\uff09\u4fdd\u6301\u8fde\u63a5\u4ee5\u786e\u96c6\u7fa4\u7684\u673a\u5668\u5b58\u6d3b\u60c5\u51b5\uff0cLearnerCnxAcceptor\u8d1f\u8d23\u63a5\u6536\u6240\u6709\u975eLeader\u670d\u52a1\u5668\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/p>\n

3. Leader\u670d\u52a1\u5668\u5f00\u59cb\u548cLeader\u5efa\u7acb\u8fde\u63a5\u3002\u6240\u6709Learner\u4f1a\u627e\u5230Leader\u670d\u52a1\u5668\uff0c\u5e76\u4e0e\u5176\u5efa\u7acb\u8fde\u63a5\u3002<\/p>\n

4. Leader\u670d\u52a1\u5668\u521b\u5efaLearnerHandler\u3002Leader\u63a5\u6536\u5230\u6765\u81ea\u5176\u4ed6\u673a\u5668\u8fde\u63a5\u521b\u5efa\u8bf7\u6c42\u540e\uff0c\u4f1a\u521b\u5efa\u4e00\u4e2aLearnerHandler\u5b9e\u4f8b\uff0c\u6bcf\u4e2aLearnerHandler\u5b9e\u4f8b\u90fd\u5bf9\u5e94\u4e00\u4e2aLeader\u4e0eLearner\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u8fde\u63a5\uff0c\u5176\u8d1f\u8d23Leader\u548cLearner\u670d\u52a1\u5668\u4e4b\u95f4\u51e0\u4e4e\u6240\u6709\u7684\u6d88\u606f\u901a\u4fe1\u548c\u6570\u636e\u540c\u6b65\u3002<\/p>\n

5. \u5411Leader\u6ce8\u518c\u3002Learner\u5b8c\u6210\u548cLeader\u7684\u8fde\u63a5\u540e\uff0c\u4f1a\u5411Leader\u8fdb\u884c\u6ce8\u518c\uff0c\u5373\u5c06Learner\u670d\u52a1\u5668\u7684\u57fa\u672c\u4fe1\u606f\uff08LearnerInfo\uff09\uff0c\u5305\u62ecSID\u548cZXID\uff0c\u53d1\u9001\u7ed9Leader\u670d\u52a1\u5668\u3002<\/p>\n

6. Leader\u89e3\u6790Learner\u4fe1\u606f\uff0c\u8ba1\u7b97\u65b0\u7684epoch\u3002Leader\u63a5\u6536\u5230Learner\u670d\u52a1\u5668\u57fa\u672c\u4fe1\u606f\u540e\uff0c\u4f1a\u89e3\u6790\u51fa\u8be5Learner\u7684SID\u548cZXID\uff0c\u7136\u540e\u6839\u636eZXID\u89e3\u6790\u51fa\u5bf9\u5e94\u7684epoch_of_learner\uff0c\u5e76\u548c\u5f53\u524dLeader\u670d\u52a1\u5668\u7684epoch_of_leader\u8fdb\u884c\u6bd4\u8f83\uff0c\u5982\u679c\u8be5Learner\u7684epoch_of_learner\u66f4\u5927\uff0c\u5219\u66f4\u65b0Leader\u7684epoch_of_leader = epoch_of_learner + 1\u3002\u7136\u540eLearnHandler\u8fdb\u884c\u7b49\u5f85\uff0c\u76f4\u5230\u8fc7\u534aLearner\u5df2\u7ecf\u5411Leader\u8fdb\u884c\u4e86\u6ce8\u518c\uff0c\u540c\u65f6\u66f4\u65b0\u4e86epoch_of_leader\u540e\uff0cLeader\u5c31\u53ef\u4ee5\u786e\u5b9a\u5f53\u524d\u96c6\u7fa4\u7684epoch\u4e86\u3002<\/p>\n

7. \u53d1\u9001Leader\u72b6\u6001\u3002\u8ba1\u7b97\u51fa\u65b0\u7684epoch\u540e\uff0cLeader\u4f1a\u5c06\u8be5\u4fe1\u606f\u4ee5\u4e00\u4e2aLEADERINFO\u6d88\u606f\u7684\u5f62\u5f0f\u53d1\u9001\u7ed9Learner\uff0c\u5e76\u7b49\u5f85Learner\u7684\u54cd\u5e94\u3002<\/p>\n

8. Learner\u53d1\u9001ACK\u6d88\u606f\u3002Learner\u63a5\u6536\u5230LEADERINFO\u540e\uff0c\u4f1a\u89e3\u6790\u51faepoch\u548cZXID\uff0c\u7136\u540e\u5411Leader\u53cd\u9988\u4e00\u4e2aACKEPOCH\u54cd\u5e94\u3002<\/p>\n

9. \u6570\u636e\u540c\u6b65\u3002Leader\u6536\u5230Learner\u7684ACKEPOCH\u540e\uff0c\u5373\u53ef\u8fdb\u884c\u6570\u636e\u540c\u6b65\u3002<\/p>\n

10. \u542f\u52a8Leader\u548cLearner\u670d\u52a1\u5668\u3002\u5f53\u6709\u8fc7\u534aLearner\u5df2\u7ecf\u5b8c\u6210\u4e86\u6570\u636e\u540c\u6b65\uff0c\u90a3\u4e48Leader\u548cLearner\u670d\u52a1\u5668\u5b9e\u4f8b\u5c31\u53ef\u4ee5\u542f\u52a8\u4e86\u3002<\/p>\n

5. Leader\u548cFollower\u542f\u52a8<\/strong><\/p>\n

1. \u521b\u5efa\u542f\u52a8\u4f1a\u8bdd\u7ba1\u7406\u5668\u3002<\/p>\n

2. \u521d\u59cb\u5316Zookeeper\u8bf7\u6c42\u5904\u7406\u94fe\uff0c\u96c6\u7fa4\u6a21\u5f0f\u7684\u6bcf\u4e2a\u5904\u7406\u5668\u4e5f\u4f1a\u5728\u542f\u52a8\u9636\u6bb5\u4e32\u8054\u8bf7\u6c42\u5904\u7406\u94fe\u3002<\/p>\n

3. \u6ce8\u518cJMX\u670d\u52a1\u3002<\/p>\n

\u81f3\u6b64\uff0c\u96c6\u7fa4\u7248\u7684Zookeeper\u670d\u52a1\u5668\u542f\u52a8\u5b8c\u6bd5\u3002<\/p>\n

\u4e09\u3001\u603b\u7ed3<\/strong><\/p>\n

\u672c\u7bc7\u535a\u6587\u5206\u6790\u4e86Zookeeper\u670d\u52a1\u7aef\u7684\u542f\u52a8\u7684\u8be6\u7ec6\u7ec6\u8282\uff0c\u4e4b\u540e\u4f1a\u7ed9\u51fa\u5177\u4f53\u7684\u4ee3\u7801\u5206\u6790\u3002\u4e5f\u8c22\u8c22\u5404\u4f4d\u56ed\u53cb\u7684\u89c2\u770b~<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e00\u3001\u524d\u8a00 \u524d\u9762\u5df2\u7ecf\u4e86\u89e3\u4e86Zookeeper\u4f1a\u8bdd\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u63a5\u7740\u6765\u5b66\u4e60Zookeeper\u670d\u52a1\u7aef\u76f8\u5173\u7ec6\u8282\u3002 \u4e8c\u3001\u670d\u52a1\u7aef \u670d\u52a1\u7aef\u6574\u4f53\u67b6\u6784\u5982\u4e0b Zookeeper\u670d\u52a1\u5668\u7684\u542f\u52a8\uff0c\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u4e94\u4e2a\u6b65\u9aa4 1. \u914d\u7f6e\u6587\u4ef6\u89e3\u6790\u3002 2. \u521d\u59cb\u5316\u6570\u636e\u7ba1\u7406\u5668\u3002 3. \u521d\u59cb\u5316\u7f51\u7edcI\/O\u7ba1\u7406\u5668\u3002 4. \u6570\u636e\u6062\u590d\u3002 5. \u5bf9\u5916\u670d\u52a1\u3002 2.1 \u5355\u673a\u7248\u670d\u52a1\u5668\u542f\u52a8 \u5355\u673a\u7248\u670d\u52a1\u5668\u7684\u542f\u52a8\u5176\u6d41\u7a0b\u56fe\u5982\u4e0b \u4e0a\u56fe\u7684\u8fc7\u7a0b\u53ef\u4ee5\u5206\u4e3a\u9884\u542f\u52a8\u548c\u521d\u59cb\u5316\u8fc7\u7a0b\u3002 1. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-819","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts\/819","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=819"}],"version-history":[{"count":0,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts\/819\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=819"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=819"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=819"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}