{"id":841,"date":"2018-07-20T08:43:17","date_gmt":"2018-07-20T00:43:17","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=841"},"modified":"2018-07-20T08:43:17","modified_gmt":"2018-07-20T00:43:17","slug":"%e3%80%90%e5%88%86%e5%b8%83%e5%bc%8f%e3%80%91zookeeper%e6%95%b0%e6%8d%ae%e4%b8%8e%e5%ad%98%e5%82%a8","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=841","title":{"rendered":"\u3010\u5206\u5e03\u5f0f\u3011Zookeeper\u6570\u636e\u4e0e\u5b58\u50a8"},"content":{"rendered":"

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

\u524d\u9762\u5206\u6790\u4e86Zookeeper\u5bf9\u8bf7\u6c42\u7684\u5904\u7406\uff0c\u672c\u7bc7\u535a\u6587\u63a5\u7740\u5206\u6790Zookeeper\u4e2d\u5982\u4f55\u5bf9\u5e95\u5c42\u6570\u636e\u8fdb\u884c\u5b58\u50a8\uff0c\u6570\u636e\u5b58\u50a8\u88ab\u5206\u4e3a\u5185\u5b58\u6570\u636e\u5b58\u50a8\u4e8e\u78c1\u76d8\u6570\u636e\u5b58\u50a8\u3002<\/p>\n

\u4e8c\u3001\u6570\u636e\u4e0e\u5b58\u50a8<\/strong><\/p>\n

2.1 \u5185\u5b58\u6570\u636e<\/p>\n

Zookeeper\u7684\u6570\u636e\u6a21\u578b\u662f\u6811\u7ed3\u6784\uff0c\u5728\u5185\u5b58\u6570\u636e\u5e93\u4e2d\uff0c\u5b58\u50a8\u4e86\u6574\u68f5\u6811\u7684\u5185\u5bb9\uff0c\u5305\u62ec\u6240\u6709\u7684\u8282\u70b9\u8def\u5f84\u3001\u8282\u70b9\u6570\u636e\u3001ACL\u4fe1\u606f\uff0cZookeeper\u4f1a\u5b9a\u65f6\u5c06\u8fd9\u4e2a\u6570\u636e\u5b58\u50a8\u5230\u78c1\u76d8\u4e0a\u3002<\/p>\n

1. DataTree<\/p>\n

DataTree\u662f\u5185\u5b58\u6570\u636e\u5b58\u50a8\u7684\u6838\u5fc3\uff0c\u662f\u4e00\u4e2a\u6811\u7ed3\u6784\uff0c\u4ee3\u8868\u4e86\u5185\u5b58\u4e2d\u4e00\u4efd\u5b8c\u6574\u7684\u6570\u636e<\/strong>\u3002DataTree\u4e0d\u5305\u542b\u4efb\u4f55\u4e0e\u7f51\u7edc\u3001\u5ba2\u6237\u7aef\u8fde\u63a5\u53ca\u8bf7\u6c42\u5904\u7406\u76f8\u5173\u7684\u4e1a\u52a1\u903b\u8f91\uff0c\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u7ec4\u4ef6\u3002<\/p>\n

2. DataNode<\/p>\n

DataNode\u662f\u6570\u636e\u5b58\u50a8\u7684\u6700\u5c0f\u5355\u5143<\/strong>\uff0c\u5176\u5185\u90e8\u9664\u4e86\u4fdd\u5b58\u4e86\u7ed3\u70b9\u7684\u6570\u636e\u5185\u5bb9\u3001ACL\u5217\u8868\u3001\u8282\u70b9\u72b6\u6001\u4e4b\u5916\uff0c\u8fd8\u8bb0\u5f55\u4e86\u7236\u8282\u70b9\u7684\u5f15\u7528\u548c\u5b50\u8282\u70b9\u5217\u8868\u4e24\u4e2a\u5c5e\u6027\uff0c\u5176\u4e5f\u63d0\u4f9b\u4e86\u5bf9\u5b50\u8282\u70b9\u5217\u8868\u8fdb\u884c\u64cd\u4f5c\u7684\u63a5\u53e3\u3002<\/p>\n

3. ZKDatabase<\/p>\n

Zookeeper\u7684\u5185\u5b58\u6570\u636e\u5e93\uff0c\u7ba1\u7406Zookeeper\u7684\u6240\u6709\u4f1a\u8bdd\u3001DataTree\u5b58\u50a8\u548c\u4e8b\u52a1\u65e5\u5fd7\u3002ZKDatabase\u4f1a\u5b9a\u65f6\u5411\u78c1\u76d8dump\u5feb\u7167\u6570\u636e\uff0c\u540c\u65f6\u5728Zookeeper\u542f\u52a8\u65f6\uff0c\u4f1a\u901a\u8fc7\u78c1\u76d8\u7684\u4e8b\u52a1\u65e5\u5fd7\u548c\u5feb\u7167\u6587\u4ef6\u6062\u590d\u6210\u4e00\u4e2a\u5b8c\u6574\u7684\u5185\u5b58\u6570\u636e\u5e93\u3002<\/p>\n

2.2 \u4e8b\u52a1\u65e5\u5fd7<\/p>\n

1. \u6587\u4ef6\u5b58\u50a8<\/p>\n

\u5728\u914d\u7f6eZookeeper\u96c6\u7fa4\u65f6\u9700\u8981\u914d\u7f6edataDir\u76ee\u5f55\uff0c\u5176\u7528\u6765\u5b58\u50a8\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u3002\u4e5f\u53ef\u4ee5\u4e3a\u4e8b\u52a1\u65e5\u5fd7\u5355\u72ec\u5206\u914d\u4e00\u4e2a\u6587\u4ef6\u5b58\u50a8\u76ee\u5f55:dataLogDir\u3002\u82e5\u914d\u7f6edataLogDir\u4e3a\/home\/admin\/zkData\/zk_log\uff0c\u90a3\u4e48Zookeeper\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u4f1a\u5728\u8be5\u76ee\u5f55\u4e0b\u5efa\u7acb\u4e00\u4e2a\u540d\u5b57\u4e3aversion-2\u7684\u5b50\u76ee\u5f55\uff0c\u8be5\u76ee\u5f55\u786e\u5b9a\u4e86\u5f53\u524dZookeeper\u4f7f\u7528\u7684\u4e8b\u52a1\u65e5\u5fd7\u683c\u5f0f\u7248\u672c\u53f7\uff0c\u5f53\u4e0b\u6b21\u67d0\u4e2aZookeeper\u7248\u672c\u5bf9\u4e8b\u52a1\u65e5\u5fd7\u683c\u5f0f\u8fdb\u884c\u53d8\u66f4\u65f6\uff0c\u6b64\u76ee\u5f55\u4e5f\u4f1a\u53d8\u66f4\uff0c\u5373\u5728version-2\u5b50\u76ee\u5f55\u4e0b\u4f1a\u751f\u6210\u4e00\u7cfb\u5217\u6587\u4ef6\u5927\u5c0f\u4e00\u81f4(64MB)\u7684\u6587\u4ef6\u3002<\/p>\n

2. \u65e5\u5fd7\u683c\u5f0f<\/p>\n

\u5728\u914d\u7f6e\u597d\u65e5\u5fd7\u6587\u4ef6\u76ee\u5f55\uff0c\u542f\u52a8Zookeeper\u540e\uff0c\u5b8c\u6210\u5982\u4e0b\u64cd\u4f5c<\/p>\n

(1) \u521b\u5efa\/test_log\u8282\u70b9\uff0c\u521d\u59cb\u503c\u4e3av1\u3002<\/p>\n

(2) \u66f4\u65b0\/test_log\u8282\u70b9\u7684\u6570\u636e\u4e3av2\u3002<\/p>\n

(3) \u521b\u5efa\/test_log\/c\u8282\u70b9\uff0c\u521d\u59cb\u503c\u4e3av1\u3002<\/p>\n

(4) \u5220\u9664\/test_log\/c\u8282\u70b9\u3002<\/p>\n

\u7ecf\u8fc7\u56db\u6b65\u64cd\u4f5c\u540e\uff0c\u4f1a\u5728\/log\/version-2\/\u76ee\u5f55\u4e0b\u751f\u6210\u4e00\u4e2a\u65e5\u5fd7\u6587\u4ef6\uff0c\u7b14\u8005\u4e0b\u662flog.cec\u3002<\/p>\n

\u5c06Zookeeper\u4e0b\u7684zookeeper-3.4.6.jar\u548cslf4j-api-1.6.1.jar\u590d\u5236\u5230\/log\/version-2\u76ee\u5f55\u4e0b\uff0c\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\u6253\u5f00log.cec\u6587\u4ef6\u3002<\/p>\n

java -classpath .\/zookeeper-3.4.6.jar:.\/slf4j-api-1.6.1.jar org.apache.zookeeper.server.LogFormatter log.cec<\/p>\n

\"\"<\/p>\n

ZooKeeper Transactional Log File with dbid 0 txnlog format version 2 \u3002\u662f\u6587\u4ef6\u5934\u4fe1\u606f\uff0c\u4e3b\u8981\u662f\u4e8b\u52a1\u65e5\u5fd7\u7684DBID\u548c\u65e5\u5fd7\u683c\u5f0f\u7248\u672c\u53f7\u3002<\/p>\n

…session 0x159…0xcec createSession 30000\u3002\u8868\u793a\u5ba2\u6237\u7aef\u4f1a\u8bdd\u521b\u5efa\u64cd\u4f5c\u3002<\/p>\n

…session 0x159…0xced create ‘\/test_log,… \u3002\u8868\u793a\u521b\u5efa\/test_log\u8282\u70b9\uff0c\u6570\u636e\u5185\u5bb9\u4e3a#7631(v1)\u3002<\/p>\n

…session 0x159…0xcee setData \u2018\/test_log,…\u3002\u8868\u793a\u8bbe\u7f6e\u4e86\/test_log\u8282\u70b9\u6570\u636e\uff0c\u5185\u5bb9\u4e3a#7632(v2)\u3002<\/p>\n

…session 0x159…0xcef create \u2019\/test_log\/c,…\u3002\u8868\u793a\u521b\u5efa\u8282\u70b9\/test_log\/c\u3002<\/p>\n

…session 0x159…0xcf0 delete ‘\/test_log\/c\u3002\u8868\u793a\u5220\u9664\u8282\u70b9\/test_log\/c\u3002<\/p>\n

3. \u65e5\u5fd7\u5199\u5165<\/p>\n

FileTxnLog\u8d1f\u8d23\u7ef4\u62a4\u4e8b\u52a1\u65e5\u5fd7\u5bf9\u5916\u7684\u63a5\u53e3\uff0c\u5305\u62ec\u4e8b\u52a1\u65e5\u5fd7\u7684\u5199\u5165\u548c\u8bfb\u53d6\u7b49\u3002Zookeeper\u7684\u4e8b\u52a1\u65e5\u5fd7\u5199\u5165\u8fc7\u7a0b\u5927\u4f53\u53ef\u4ee5\u5206\u4e3a\u5982\u4e0b6\u4e2a\u6b65\u9aa4\u3002<\/p>\n

(1)\u00a0\u786e\u5b9a\u662f\u5426\u6709\u4e8b\u52a1\u65e5\u5fd7\u53ef\u5199<\/strong>\u3002\u5f53Zookeeper\u670d\u52a1\u5668\u542f\u52a8\u5b8c\u6210\u9700\u8981\u8fdb\u884c\u7b2c\u4e00\u6b21\u4e8b\u52a1\u65e5\u5fd7\u7684\u5199\u5165\uff0c\u6216\u662f\u4e0a\u4e00\u6b21\u4e8b\u52a1\u65e5\u5fd7\u5199\u6ee1\u65f6\uff0c\u90fd\u4f1a\u5904\u4e8e\u4e0e\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u65ad\u5f00\u7684\u72b6\u6001\uff0c\u5373Zookeeper\u670d\u52a1\u5668\u6ca1\u6709\u548c\u4efb\u610f\u4e00\u4e2a\u65e5\u5fd7\u6587\u4ef6\u76f8\u5173\u8054\u3002\u56e0\u6b64\u5728\u8fdb\u884c\u4e8b\u52a1\u65e5\u5fd7\u5199\u5165\u524d\uff0cZookeeper\u9996\u5148\u4f1a\u5224\u65adFileTxnLog\u7ec4\u4ef6\u662f\u5426\u5df2\u7ecf\u5173\u8054\u4e0a\u4e00\u4e2a\u53ef\u5199\u7684\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u3002\u82e5\u6ca1\u6709\uff0c\u5219\u4f1a\u4f7f\u7528\u8be5\u4e8b\u52a1\u64cd\u4f5c\u5173\u8054\u7684ZXID\u4f5c\u4e3a\u540e\u7f00\u521b\u5efa\u4e00\u4e2a\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\uff0c\u540c\u65f6\u6784\u5efa\u4e8b\u52a1\u65e5\u5fd7\u7684\u6587\u4ef6\u5934\u4fe1\u606f\uff0c\u5e76\u7acb\u5373\u5199\u5165\u8fd9\u4e2a\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u4e2d\u53bb\uff0c\u540c\u65f6\u5c06\u8be5\u6587\u4ef6\u7684\u6587\u4ef6\u6d41\u653e\u5165streamToFlush\u96c6\u5408\uff0c\u8be5\u96c6\u5408\u7528\u6765\u8bb0\u5f55\u5f53\u524d\u9700\u8981\u5f3a\u5236\u8fdb\u884c\u6570\u636e\u843d\u76d8\u7684\u6587\u4ef6\u6d41\u3002<\/p>\n

(2)\u00a0\u786e\u5b9a\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u662f\u5426\u9700\u8981\u6269\u5bb9(\u9884\u5206\u914d)<\/strong>\u3002Zookeeper\u4f1a\u91c7\u7528\u78c1\u76d8\u7a7a\u95f4\u9884\u5206\u914d\u7b56\u7565\u3002\u5f53\u68c0\u6d4b\u5230\u5f53\u524d\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u5269\u4f59\u7a7a\u95f4\u4e0d\u8db34096\u5b57\u8282\u65f6\uff0c\u5c31\u4f1a\u5f00\u59cb\u8fdb\u884c\u6587\u4ef6\u7a7a\u95f4\u6269\u5bb9\uff0c\u5373\u5728\u73b0\u6709\u6587\u4ef6\u5927\u5c0f\u4e0a\uff0c\u5c06\u6587\u4ef6\u589e\u52a065536KB(64MB)\uff0c\u7136\u540e\u4f7f\u7528”0″\u586b\u5145\u88ab\u6269\u5bb9\u7684\u6587\u4ef6\u7a7a\u95f4\u3002<\/p>\n

(3)\u00a0\u4e8b\u52a1\u5e8f\u5217\u5316<\/strong>\u3002\u5bf9\u4e8b\u52a1\u5934\u548c\u4e8b\u52a1\u4f53\u7684\u5e8f\u5217\u5316\uff0c\u5176\u4e2d\u4e8b\u52a1\u4f53\u53c8\u53ef\u5206\u4e3a\u4f1a\u8bdd\u521b\u5efa\u4e8b\u52a1\u3001\u8282\u70b9\u521b\u5efa\u4e8b\u52a1\u3001\u8282\u70b9\u5220\u9664\u4e8b\u52a1\u3001\u8282\u70b9\u6570\u636e\u66f4\u65b0\u4e8b\u52a1\u7b49\u3002<\/p>\n

(4)\u00a0\u751f\u6210Checksum<\/strong>\u3002\u4e3a\u4fdd\u8bc1\u65e5\u5fd7\u6587\u4ef6\u7684\u5b8c\u6574\u6027\u548c\u6570\u636e\u7684\u51c6\u786e\u6027\uff0cZookeeper\u5728\u5c06\u4e8b\u52a1\u65e5\u5fd7\u5199\u5165\u6587\u4ef6\u524d\uff0c\u4f1a\u8ba1\u7b97\u751f\u6210Checksum\u3002<\/p>\n

(5)\u00a0\u5199\u5165\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u6d41<\/strong>\u3002\u5c06\u5e8f\u5217\u5316\u540e\u7684\u4e8b\u52a1\u5934\u3001\u4e8b\u52a1\u4f53\u548cChecksum\u5199\u5165\u6587\u4ef6\u6d41\u4e2d\uff0c\u6b64\u65f6\u5e76\u4e3a\u5199\u5165\u5230\u78c1\u76d8\u4e0a\u3002<\/p>\n

(6)\u00a0\u4e8b\u52a1\u65e5\u5fd7\u5237\u5165\u78c1\u76d8<\/strong>\u3002\u7531\u4e8e\u6b65\u9aa45\u4e2d\u7684\u7f13\u5b58\u539f\u56e0\uff0c\u65e0\u6cd5\u5b9e\u65f6\u5730\u5199\u5165\u78c1\u76d8\u6587\u4ef6\u4e2d\uff0c\u56e0\u6b64\u9700\u8981\u5c06\u7f13\u5b58\u6570\u636e\u5f3a\u5236\u5237\u5165\u78c1\u76d8\u3002<\/p>\n

4. \u65e5\u5fd7\u622a\u65ad<\/p>\n

\u5728Zookeeper\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u80fd\u51fa\u73b0\u975eLeader\u8bb0\u5f55\u7684\u4e8b\u52a1ID\u6bd4Leader\u4e0a\u5927\uff0c\u8fd9\u662f\u975e\u6cd5\u8fd0\u884c\u72b6\u6001\u3002\u6b64\u65f6\uff0c\u9700\u8981\u4fdd\u8bc1\u6240\u6709\u673a\u5668\u5fc5\u987b\u4e0e\u8be5Leader\u7684\u6570\u636e\u4fdd\u6301\u540c\u6b65\uff0c\u5373Leader\u4f1a\u53d1\u9001TRUNC\u547d\u4ee4\u7ed9\u8be5\u673a\u5668\uff0c\u8981\u6c42\u8fdb\u884c\u65e5\u5fd7\u622a\u65ad\uff0cLearner\u6536\u5230\u8be5\u547d\u4ee4\u540e\uff0c\u5c31\u4f1a\u5220\u9664\u6240\u6709\u5305\u542b\u6216\u5927\u4e8e\u8be5\u4e8b\u52a1ID\u7684\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6\u3002<\/p>\n

2.3 snapshot-\u6570\u636e\u5feb\u7167<\/p>\n

\u6570\u636e\u5feb\u7167\u662fZookeeper\u6570\u636e\u5b58\u50a8\u4e2d\u975e\u5e38\u6838\u5fc3\u7684\u8fd0\u884c\u673a\u5236\uff0c\u6570\u636e\u5feb\u7167\u7528\u6765\u8bb0\u5f55Zookeeper\u670d\u52a1\u5668\u4e0a\u67d0\u4e00\u65f6\u523b\u7684\u5168\u91cf\u5185\u5b58\u6570\u636e\u5185\u5bb9\uff0c\u5e76\u5c06\u5176\u5199\u5165\u6307\u5b9a\u7684\u78c1\u76d8\u6587\u4ef6\u4e2d\u3002<\/p>\n

1. \u6587\u4ef6\u5b58\u50a8<\/p>\n

\u4e0e\u4e8b\u52a1\u6587\u4ef6\u7c7b\u4f3c\uff0cZookeeper\u5feb\u7167\u6587\u4ef6\u4e5f\u53ef\u4ee5\u6307\u5b9a\u7279\u5b9a\u78c1\u76d8\u76ee\u5f55\uff0c\u901a\u8fc7dataDir\u5c5e\u6027\u6765\u914d\u7f6e\u3002\u82e5\u6307\u5b9adataDir\u4e3a\/home\/admin\/zkData\/zk_data\uff0c\u5219\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u4f1a\u5728\u8be5\u76ee\u5f55\u4e0b\u521b\u5efaversion-2\u7684\u76ee\u5f55\uff0c\u8be5\u76ee\u5f55\u786e\u5b9a\u4e86\u5f53\u524dZookeeper\u4f7f\u7528\u7684\u5feb\u7167\u6570\u636e\u683c\u5f0f\u7248\u672c\u53f7\u3002\u5728Zookeeper\u8fd0\u884c\u65f6\uff0c\u4f1a\u751f\u6210\u4e00\u7cfb\u5217\u6587\u4ef6\u3002<\/p>\n

2. \u6570\u636e\u5feb\u7167<\/p>\n

FileSnap\u8d1f\u8d23\u7ef4\u62a4\u5feb\u7167\u6570\u636e\u5bf9\u5916\u7684\u63a5\u53e3\uff0c\u5305\u62ec\u5feb\u7167\u6570\u636e\u7684\u5199\u5165\u548c\u8bfb\u53d6\u7b49\uff0c\u5c06\u5185\u5b58\u6570\u636e\u5e93\u5199\u5165\u5feb\u7167\u6570\u636e\u6587\u4ef6\u5176\u5b9e\u662f\u4e00\u4e2a\u5e8f\u5217\u5316\u8fc7\u7a0b\u3002\u9488\u5bf9\u5ba2\u6237\u7aef\u7684\u6bcf\u4e00\u6b21\u4e8b\u52a1\u64cd\u4f5c\uff0cZookeeper\u90fd\u4f1a\u5c06\u4ed6\u4eec\u8bb0\u5f55\u5230\u4e8b\u52a1\u65e5\u5fd7\u4e2d\uff0c\u540c\u65f6\u4e5f\u4f1a\u5c06\u6570\u636e\u53d8\u66f4\u5e94\u7528\u5230\u5185\u5b58\u6570\u636e\u5e93\u4e2d\uff0cZookeeper\u5728\u8fdb\u884c\u82e5\u5e72\u6b21\u4e8b\u52a1\u65e5\u5fd7\u8bb0\u5f55\u540e\uff0c\u5c06\u5185\u5b58\u6570\u636e\u5e93\u7684\u5168\u91cf\u6570\u636eDump\u5230\u672c\u5730\u6587\u4ef6\u4e2d\uff0c\u8fd9\u5c31\u662f\u6570\u636e\u5feb\u7167\u3002\u5176\u6b65\u9aa4\u5982\u4e0b<\/p>\n

(1)\u00a0\u786e\u5b9a\u662f\u5426\u9700\u8981\u8fdb\u884c\u6570\u636e\u5feb\u7167<\/strong>\u3002\u6bcf\u8fdb\u884c\u4e00\u6b21\u4e8b\u52a1\u65e5\u5fd7\u8bb0\u5f55\u4e4b\u540e\uff0cZookeeper\u90fd\u4f1a\u68c0\u6d4b\u5f53\u524d\u662f\u5426\u9700\u8981\u8fdb\u884c\u6570\u636e\u5feb\u7167\uff0c\u8003\u8651\u5230\u6570\u636e\u5feb\u7167\u5bf9\u4e8eZookeeper\u673a\u5668\u7684\u5f71\u54cd\uff0c\u9700\u8981\u5c3d\u91cf\u907f\u514dZookeeper\u96c6\u7fa4\u4e2d\u7684\u6240\u6709\u673a\u5668\u5728\u540c\u4e00\u65f6\u523b\u8fdb\u884c\u6570\u636e\u5feb\u7167\u3002\u91c7\u7528\u8fc7\u534a\u968f\u673a\u7b56\u7565\u8fdb\u884c\u6570\u636e\u5feb\u7167\u64cd\u4f5c\u3002<\/p>\n

(2)\u00a0\u5207\u6362\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6<\/strong>\u3002\u8868\u793a\u5f53\u524d\u7684\u4e8b\u52a1\u65e5\u5fd7\u5df2\u7ecf\u5199\u6ee1\uff0c\u9700\u8981\u91cd\u65b0\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u4e8b\u52a1\u65e5\u5fd7\u3002<\/p>\n

(3)\u00a0\u521b\u5efa\u6570\u636e\u5feb\u7167\u5f02\u6b65\u7ebf\u7a0b<\/strong>\u3002\u521b\u5efa\u5355\u72ec\u7684\u5f02\u6b65\u7ebf\u7a0b\u6765\u8fdb\u884c\u6570\u636e\u5feb\u7167\u4ee5\u907f\u514d\u5f71\u54cdZookeeper\u4e3b\u6d41\u7a0b\u3002<\/p>\n

(4)\u00a0\u83b7\u53d6\u5168\u91cf\u6570\u636e\u548c\u4f1a\u8bdd\u4fe1\u606f<\/strong>\u3002\u4eceZKDatabase\u4e2d\u83b7\u53d6\u5230DataTree\u548c\u4f1a\u8bdd\u4fe1\u606f\u3002<\/p>\n

(5)\u00a0\u751f\u6210\u5feb\u7167\u6570\u636e\u6587\u4ef6\u540d<\/strong>\u3002Zookeeper\u6839\u636e\u5f53\u524d\u5df2\u7ecf\u63d0\u4ea4\u7684\u6700\u5927ZXID\u6765\u751f\u6210\u6570\u636e\u5feb\u7167\u6587\u4ef6\u540d\u3002<\/p>\n

(6)\u00a0\u6570\u636e\u5e8f\u5217\u5316<\/strong>\u3002\u9996\u5148\u5e8f\u5217\u5316\u6587\u4ef6\u5934\u4fe1\u606f\uff0c\u7136\u540e\u518d\u5bf9\u4f1a\u8bdd\u4fe1\u606f\u548cDataTree\u5206\u522b\u8fdb\u884c\u5e8f\u5217\u5316\uff0c\u540c\u65f6\u751f\u6210\u4e00\u4e2aChecksum\uff0c\u4e00\u5e76\u5199\u5165\u5feb\u7167\u6570\u636e\u6587\u4ef6\u4e2d\u53bb\u3002<\/p>\n

2.4 \u521d\u59cb\u5316<\/p>\n

\u5728Zookeeper\u670d\u52a1\u5668\u542f\u52a8\u671f\u95f4\uff0c\u9996\u5148\u4f1a\u8fdb\u884c\u6570\u636e\u521d\u59cb\u5316\u5de5\u4f5c\uff0c\u7528\u4e8e\u5c06\u5b58\u50a8\u5728\u78c1\u76d8\u4e0a\u7684\u6570\u636e\u6587\u4ef6\u52a0\u8f7d\u5230Zookeeper\u670d\u52a1\u5668\u5185\u5b58\u4e2d\u3002<\/p>\n

1. \u521d\u59cb\u5316\u6d41\u7a0b<\/p>\n

Zookeeper\u7684\u521d\u59cb\u5316\u8fc7\u7a0b\u5982\u4e0b\u56fe\u6240\u793a<\/p>\n

\"\"<\/p>\n

\u6570\u636e\u7684\u521d\u59cb\u5316\u5de5\u4f5c\u662f\u4ece\u78c1\u76d8\u4e0a\u52a0\u8f7d\u6570\u636e\u7684\u8fc7\u7a0b\uff0c\u4e3b\u8981\u5305\u62ec\u4e86\u4ece\u5feb\u7167\u6587\u4ef6\u4e2d\u52a0\u8f7d\u5feb\u7167\u6570\u636e\u548c\u6839\u636e\u5b9e\u7269\u65e5\u5fd7\u8fdb\u884c\u6570\u636e\u4fee\u6b63\u4e24\u4e2a\u8fc7\u7a0b\u3002<\/p>\n

(1)\u00a0\u521d\u59cb\u5316FileTxnSnapLog<\/strong>\u3002FileTxnSnapLog\u662fZookeeper\u4e8b\u52a1\u65e5\u5fd7\u548c\u5feb\u7167\u6570\u636e\u8bbf\u95ee\u5c42\uff0c\u7528\u4e8e\u8854\u63a5\u4e0a\u5c42\u4e1a\u52a1\u548c\u5e95\u5c42\u6570\u636e\u5b58\u50a8\uff0c\u5e95\u5c42\u6570\u636e\u5305\u542b\u4e86\u4e8b\u52a1\u65e5\u5fd7\u548c\u5feb\u7167\u6570\u636e\u4e24\u90e8\u5206\u3002FileTxnSnapLog\u4e2d\u5bf9\u5e94FileTxnLog\u548cFileSnap\u3002<\/p>\n

(2)\u00a0\u521d\u59cb\u5316ZKDatabase<\/strong>\u3002\u9996\u5148\u6784\u5efaDataTree\uff0c\u540c\u65f6\u5c06FileTxnSnapLog\u4ea4\u4ed8ZKDatabase\uff0c\u4ee5\u4fbf\u5185\u5b58\u6570\u636e\u5e93\u80fd\u591f\u5bf9\u4e8b\u52a1\u65e5\u5fd7\u548c\u5feb\u7167\u6570\u636e\u8fdb\u884c\u8bbf\u95ee\u3002\u5728ZKDatabase\u521d\u59cb\u5316\u65f6\uff0cDataTree\u4e5f\u4f1a\u8fdb\u884c\u76f8\u5e94\u7684\u521d\u59cb\u5316\u5de5\u4f5c\uff0c\u5982\u521b\u5efa\u4e00\u4e9b\u9ed8\u8ba4\u7ed3\u70b9\uff0c\u5982\/\u3001\/zookeeper\u3001\/zookeeper\/quota\u4e09\u4e2a\u8282\u70b9\u3002<\/p>\n

(3)\u00a0\u521b\u5efaPlayBackListener<\/strong>\u3002\u5176\u4e3b\u8981\u7528\u6765\u63a5\u6536\u4e8b\u52a1\u5e94\u7528\u8fc7\u7a0b\u4e2d\u7684\u56de\u8c03\uff0c\u5728Zookeeper\u6570\u636e\u6062\u590d\u540e\u671f\uff0c\u4f1a\u6709\u4e8b\u52a1\u4fee\u6b63\u8fc7\u7a0b\uff0c\u6b64\u8fc7\u7a0b\u4f1a\u56de\u8c03PlayBackListener\u6765\u8fdb\u884c\u5bf9\u5e94\u7684\u6570\u636e\u4fee\u6b63\u3002<\/p>\n

(4)\u00a0\u5904\u7406\u5feb\u7167\u6587\u4ef6<\/strong>\u3002\u6b64\u65f6\u53ef\u4ee5\u4ece\u78c1\u76d8\u4e2d\u6062\u590d\u6570\u636e\u4e86\uff0c\u9996\u5148\u4ece\u5feb\u7167\u6587\u4ef6\u5f00\u59cb\u52a0\u8f7d\u3002<\/p>\n

(5)\u00a0\u83b7\u53d6\u6700\u65b0\u7684100\u4e2a\u5feb\u7167\u6587\u4ef6<\/strong>\u3002\u66f4\u65b0\u65f6\u95f4\u6700\u665a\u7684\u5feb\u7167\u6587\u4ef6\u5305\u542b\u4e86\u6700\u65b0\u7684\u5168\u91cf\u6570\u636e\u3002<\/p>\n

(6)\u00a0\u89e3\u6790\u5feb\u7167\u6587\u4ef6<\/strong>\u3002\u9010\u4e2a\u89e3\u6790\u5feb\u7167\u6587\u4ef6\uff0c\u6b64\u65f6\u9700\u8981\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\uff0c\u751f\u6210DataTree\u548csessionsWithTimeouts\uff0c\u540c\u65f6\u8fd8\u4f1a\u6821\u9a8cChecksum\u53ca\u5feb\u7167\u6587\u4ef6\u7684\u6b63\u786e\u6027\u3002\u5bf9\u4e8e100\u4e2a\u5feb\u627e\u6587\u4ef6\uff0c\u5982\u679c\u6b63\u786e\u6027\u6821\u9a8c\u901a\u8fc7\u65f6\uff0c\u901a\u5e38\u53ea\u4f1a\u89e3\u6790\u6700\u65b0\u7684\u90a3\u4e2a\u5feb\u7167\u6587\u4ef6\u3002\u53ea\u6709\u6700\u65b0\u5feb\u7167\u6587\u4ef6\u4e0d\u53ef\u7528\u65f6\uff0c\u624d\u4f1a\u9010\u4e2a\u8fdb\u884c\u89e3\u6790\uff0c\u76f4\u81f3100\u4e2a\u5feb\u7167\u6587\u4ef6\u5168\u90e8\u89e3\u6790\u5b8c\u3002\u82e5\u5c06100\u4e2a\u5feb\u7167\u6587\u4ef6\u89e3\u6790\u5b8c\u540e\u8fd8\u662f\u65e0\u6cd5\u6210\u529f\u6062\u590d\u4e00\u4e2a\u5b8c\u6574\u7684DataTree\u548csessionWithTimeouts\uff0c\u6b64\u65f6\u670d\u52a1\u5668\u542f\u52a8\u5931\u8d25\u3002<\/p>\n

(7)\u00a0\u83b7\u53d6\u6700\u65b0\u7684ZXID<\/strong>\u3002\u6b64\u65f6\u6839\u636e\u5feb\u7167\u6587\u4ef6\u7684\u6587\u4ef6\u540d\u5373\u53ef\u89e3\u6790\u51fa\u6700\u65b0\u7684ZXID\uff1azxid_for_snap\u3002\u8be5ZXID\u4ee3\u8868\u4e86Zookeeper\u5f00\u59cb\u8fdb\u884c\u6570\u636e\u5feb\u7167\u7684\u65f6\u523b\u3002<\/p>\n

(8)\u00a0\u5904\u7406\u4e8b\u52a1\u65e5\u5fd7<\/strong>\u3002\u6b64\u65f6\u670d\u52a1\u5668\u5185\u5b58\u4e2d\u5df2\u7ecf\u6709\u4e86\u4e00\u4efd\u8fd1\u4f3c\u5168\u91cf\u7684\u6570\u636e\uff0c\u73b0\u5728\u5f00\u59cb\u901a\u8fc7\u4e8b\u52a1\u65e5\u5fd7\u6765\u66f4\u65b0\u589e\u91cf\u6570\u636e\u3002<\/p>\n

(9)\u00a0\u83b7\u53d6\u6240\u6709zxid_for_snap\u4e4b\u540e\u63d0\u4ea4\u7684\u4e8b\u52a1<\/strong>\u3002\u6b64\u65f6\uff0c\u5df2\u7ecf\u53ef\u4ee5\u83b7\u53d6\u5feb\u7167\u6570\u636e\u7684\u6700\u65b0ZXID\u3002\u53ea\u9700\u8981\u4ece\u4e8b\u52a1\u65e5\u5fd7\u4e2d\u83b7\u53d6\u6240\u6709ZXID\u6bd4\u6b65\u9aa47\u5f97\u5230\u7684ZXID\u5927\u7684\u4e8b\u52a1\u64cd\u4f5c\u3002<\/p>\n

(10)\u00a0\u4e8b\u52a1\u5e94\u7528<\/strong>\u3002\u83b7\u53d6\u5927\u4e8ezxid_for_snap\u7684\u4e8b\u52a1\u540e\uff0c\u5c06\u5176\u9010\u4e2a\u5e94\u7528\u5230\u4e4b\u524d\u57fa\u4e8e\u5feb\u7167\u6570\u636e\u6587\u4ef6\u6062\u590d\u51fa\u6765\u7684DataTree\u548csessionsWithTimeouts\u3002\u6bcf\u5f53\u6709\u4e00\u4e2a\u4e8b\u52a1\u88ab\u5e94\u7528\u5230\u5185\u5b58\u6570\u636e\u5e93\u4e2d\u540e\uff0cZookeeper\u540c\u65f6\u4f1a\u56de\u8c03PlayBackListener\uff0c\u5c06\u8fd9\u4e8b\u52a1\u64cd\u4f5c\u8bb0\u5f55\u8f6c\u6362\u6210Proposal\uff0c\u5e76\u4fdd\u5b58\u5230ZKDatabase\u7684committedLog\u4e2d\uff0c\u4ee5\u4fbfFollower\u8fdb\u884c\u5feb\u901f\u540c\u6b65\u3002<\/p>\n

(11)\u00a0\u83b7\u53d6\u6700\u65b0\u7684ZXID<\/strong>\u3002\u5f85\u6240\u6709\u7684\u4e8b\u52a1\u90fd\u88ab\u5b8c\u6574\u5730\u5e94\u7528\u5230\u5185\u5b58\u6570\u636e\u5e93\u4e2d\u540e\uff0c\u4e5f\u5c31\u57fa\u672c\u4e0a\u5b8c\u6210\u4e86\u6570\u636e\u7684\u521d\u59cb\u5316\u8fc7\u7a0b\uff0c\u6b64\u65f6\u518d\u6b21\u83b7\u53d6ZXID\uff0c\u7528\u6765\u6807\u8bc6\u4e0a\u6b21\u670d\u52a1\u5668\u6b63\u5e38\u8fd0\u884c\u65f6\u63d0\u4ea4\u7684\u6700\u5927\u4e8b\u52a1ID\u3002<\/p>\n

(12)\u00a0\u6821\u9a8cepoch<\/strong>\u3002epoch\u6807\u8bc6\u4e86\u5f53\u524dLeader\u5468\u671f\uff0c\u96c6\u7fa4\u673a\u5668\u76f8\u4e92\u901a\u4fe1\u65f6\uff0c\u4f1a\u5e26\u4e0a\u8fd9\u4e2aepoch\u4ee5\u786e\u4fdd\u5f7c\u6b64\u5728\u540c\u4e00\u4e2aLeader\u5468\u671f\u4e2d\u3002\u5b8c\u6210\u6570\u636e\u52a0\u8f7d\u540e\uff0cZookeeper\u4f1a\u4ece\u6b65\u9aa411\u4e2d\u786e\u5b9aZXID\u4e2d\u89e3\u6790\u51fa\u4e8b\u52a1\u5904\u7406\u7684Leader\u5468\u671f\uff1aepochOfZxid\u3002\u540c\u65f6\u4e5f\u4f1a\u4ece\u78c1\u76d8\u7684currentEpoch\u548cacceptedEpoch\u6587\u4ef6\u4e2d\u8bfb\u53d6\u4e0a\u6b21\u8bb0\u5f55\u7684\u6700\u65b0\u7684epoch\u503c\uff0c\u8fdb\u884c\u6821\u9a8c\u3002<\/p>\n

2.5 \u6570\u636e\u540c\u6b65<\/p>\n

\u6574\u4e2a\u96c6\u7fa4\u5b8c\u6210Leader\u9009\u4e3e\u540e\uff0cLearner\u4f1a\u5411Leader\u8fdb\u884c\u6ce8\u518c\uff0c\u5f53Learner\u5411Leader\u5b8c\u6210\u6ce8\u518c\u540e\uff0c\u5c31\u8fdb\u5165\u6570\u636e\u540c\u6b65\u73af\u8282\uff0c\u540c\u6b65\u8fc7\u7a0b\u5c31\u662fLeader\u5c06\u90a3\u4e9b\u6ca1\u6709\u5728Learner\u670d\u52a1\u5668\u4e0a\u63d0\u4ea4\u8fc7\u7684\u4e8b\u52a1\u8bf7\u6c42\u540c\u6b65\u7ed9Learner\u670d\u52a1\u5668\uff0c\u5927\u4f53\u8fc7\u7a0b\u5982\u4e0b<\/p>\n

\"\"<\/p>\n

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