\n\u7edf\u4e2d\u6709\u5927\u7ea6100w\u7684\u7528\u6237\uff0c\u6bcf\u4e2a\u7528\u6237\u5e73
\n\u5747\u67093\u4e2a\u90ae\u7bb1\u8d26\u53f7\uff0c\u6bcf\u96945\u5206\u949f\uff0c\u6bcf\u4e2a\u90ae\u7bb1\u8d26\u9700\u8981\u6536\u53d6100\u5c01\u90ae\u4ef6\uff0c\u6700\u591a3\u4ebf\u4efd\u90ae\u4ef6\u9700\u8981\u4e0b\u8f7d\u5230\u670d\u52a1\u5668\u4e2d(\u4e0d\u542b\u9644\u4ef6\u548c\u6b63\u6587)\u3002\u752820\u53f0\u673a\u5668\u5212\u5206\u8ba1\u7b97\u7684\u538b\u529b\uff0c\u4ece
\n \u591a\u4e2a\u4e0d\u540c\u7684\u7f51\u8def\u51fa\u53e3\u8fdb\u884c\u8bbf\u95ee\u5916\u7f51\uff0c\u8ba1\u7b97\u7684\u538b\u529b\u5f97\u5230\u7f13\u89e3\uff0c\u90a3\u4e48\u6bcf\u53f0\u673a\u5668\u7684\u8ba1\u7b97\u538b\u529b\u4e5f\u4e0d\u4f1a\u5f88\u5927\u4e86\u3002<\/p>\n
\u901a\u8fc7\u6211\u4eec\u7684\u8ba8\u8bba\u548c\u4ee5\u5f80\u7684\u7ecf\u9a8c\u5224\u65ad\u5728\u8fd9\u573a\u666f\u4e2d\u53ef\u4ee5\u5b9e\u73b0\u5e76\u884c\u8ba1\u7b97\uff0c\u4f46\u6211\u4eec\u8fd8\u671f\u671b\u80fd\u5bf9\u5e76\u884c\u8ba1\u7b97\u7684\u8282\u70b9\u8fdb\u884c\u52a8\u6001\u7684\u6dfb\u52a0\/\u5220\u9664\uff0c\u505a\u5230\u5728\u7ebf\u66f4\u65b0\u5e76\u884c\u8ba1\u7b97\u7684\u6570\u76ee\u5e76\u4e14\u4e0d\u4f1a\u5f71\u54cd\u8ba1\u7b97\u5355\u5143\u4e2d\u7684\u5176\u4ed6\u8ba1\u7b97\u8282\u70b9\uff0c\u4f46\u662f\u67094\u4e2a\u95ee\u9898\u9700\u8981\u89e3\u51b3\uff0c\u5426\u5219\u4f1a\u51fa\u73b0\u4e00\u4e9b\u4e25\u91cd\u7684\u95ee\u9898\uff1a<\/p>\n
- \n
- 20\u53f0\u673a\u5668\u540c\u65f6\u5de5\u4f5c\u65f6\uff0c\u6709\u4e00\u53f0\u673a\u5668down\u6389\u4e86\uff0c\u5176\u4ed6\u673a\u5668\u600e\u4e48\u8fdb\u884c\u63a5\u7ba1\u8ba1\u7b97\u4efb\u52a1\uff0c\u5426\u5219\u6709\u4e9b\u7528\u6237\u7684\u4e1a\u52a1\u4e0d\u4f1a\u88ab\u5904\u7406\uff0c\u9020\u6210\u7528\u6237\u670d\u52a1\u7ec8\u65ad\u3002<\/li>\n
- \u968f\u7740\u7528\u6237\u6570\u91cf\u589e\u52a0\uff0c\u6dfb\u52a0\u673a\u5668\u662f\u53ef\u4ee5\u89e3\u51b3\u8ba1\u7b97\u7684\u74f6\u9888\uff0c\u4f46\u9700\u8981\u91cd\u542f\u6240\u6709\u8ba1\u7b97\u8282\u70b9\uff0c\u5982\u679c\u9700\u8981\uff0c\u90a3\u4e48\u5c06\u4f1a\u9020\u6210\u6574\u4e2a\u7cfb\u7edf\u7684\u4e0d\u53ef\u7528\u3002<\/li>\n
- \u7528\u6237\u6570\u91cf\u589e\u52a0\u6216\u8005\u51cf\u5c11\uff0c\u8ba1\u7b97\u8282\u70b9\u4e2d\u7684\u673a\u5668\u4f1a\u51fa\u73b0\u6709\u7684\u673a\u5668\u8d44\u6e90\u4f7f\u7528\u7387\u7e41\u5fd9\uff0c\u6709\u7684\u5374\u7a7a\u95f2\uff0c\u56e0\u4e3a\u8ba1\u7b97\u8282\u70b9\u4e0d\u77e5\u9053\u5f7c\u6b64\u7684\u8fd0\u884c\u8d1f\u8f7d\u72b6\u6001\u3002<\/li>\n
- \u600e\u4e48\u53bb\u901a\u77e5\u6bcf\u4e2a\u8282\u70b9\u5f7c\u6b64\u7684\u8d1f\u8f7d\u72b6\u6001\uff0c\u600e\u4e48\u4fdd\u8bc1\u901a\u77e5\u6bcf\u4e2a\u8ba1\u7b97\u8282\u70b9\u65b9\u5f0f\u7684\u53ef\u9760\u6027\u548c\u5b9e\u65f6\u6027\u3002<\/li>\n<\/ol>\n
\u5148\u4e0d\u8bf4\u90a3\u4e48\u591a\u4e13\u4e1a\u540d\u8bcd\uff0c\u767d\u8bdd\u6765\u8bf4\u6211\u4eec\u9700\u8981\u7684\u662f\uff1a1\u8bb0\u5f55\u72b6\u6001\uff0c2\u4e8b\u4ef6\u901a\u77e5 \uff0c3\u53ef\u9760\u7a33\u5b9a\u7684\u4e2d\u592e\u8c03\u5ea6\u5668\uff0c4\u6613\u4e0a\u624b\u3001\u7ba1\u7406\u7b80\u5355\u3002
\n \u91c7\u7528Zookeeper\u5b8c\u5168\u53ef\u4ee5\u89e3\u51b3\u6211\u4eec\u7684\u95ee\u9898\uff0c\u5206\u5e03\u5f0f\u8ba1\u7b97\u4e2d\u7684\u534f\u8c03\u5458\uff0c\u89c2\u5bdf\u8005\uff0c\u5206\u5e03\u5f0f\u9501
\n\u90fd\u53ef\u4ee5\u4f5c\u4e3azookeeper\u7684\u5173\u952e\u8bcd\uff0c\u5728\u7cfb\u7edf\u4e2d\u5229\u7528Zookeeper\u6765\u5904\u7406\u4e8b\u4ef6\u901a\u77e5,\u961f\u5217,\u4f18\u5148\u961f\u5217,\u9501,\u5171\u4eab\u9501\u7b49\u529f\u80fd\uff0c\u5229\u7528\u8fd9\u4e9b\u7279\u8272\u5728\u5206\u5e03\u5f0f\u8ba1\u7b97\u4e2d
\n\u53d1\u6325\u91cd\u8981\u7684\u4f5c\u7528\u3002<\/p>\n<\/a>\u573a\u666f\u4e8c <\/h2>\n
\u5047
\n\u8bbe\u6211\u4eec\u6211\u4eec\u6709\u4e2a20\u4e2a\u641c\u7d22\u5f15\u64ce\u7684\u670d\u52a1\u5668(\u6bcf\u4e2a\u8d1f\u8d23\u603b\u7d22\u5f15\u4e2d\u7684\u4e00\u90e8\u5206\u7684\u641c\u7d22\u4efb\u52a1)\u548c\u4e00\u4e2a\u603b\u670d\u52a1\u5668(\u8d1f\u8d23\u5411\u8fd920\u4e2a\u641c\u7d22\u5f15\u64ce\u7684\u670d\u52a1\u5668\u53d1\u51fa\u641c\u7d22\u8bf7\u6c42\u5e76\u5408\u5e76
\n\u7ed3\u679c\u96c6),\u4e00\u4e2a\u5907\u7528\u7684\u603b\u670d\u52a1\u5668(\u8d1f\u8d23\u5f53\u603b\u670d\u52a1\u5668\u5b95\u673a\u65f6\u66ff\u6362\u603b\u670d\u52a1\u5668),\u4e00\u4e2aweb\u7684
\ncgi(\u5411\u603b\u670d\u52a1\u5668\u53d1\u51fa\u641c\u7d22\u8bf7\u6c42).\u641c\u7d22\u5f15\u64ce\u7684\u670d\u52a1\u5668\u4e2d\u768415\u4e2a\u670d\u52a1\u5668\u73b0\u5728\u63d0\u4f9b\u641c\u7d22\u670d\u52a1,5\u4e2a\u670d\u52a1\u5668\u6b63\u5728\u751f\u6210\u7d22\u5f15.\u8fd920\u4e2a\u641c\u7d22\u5f15\u64ce\u7684\u670d\u52a1\u5668\u7ecf\u5e38\u8981\u8ba9\u6b63\u5728<\/p>\n\u63d0\u4f9b\u641c\u7d22\u670d\u52a1\u7684\u670d\u52a1\u5668\u505c\u6b62\u63d0\u4f9b\u670d\u52a1\u5f00\u59cb\u751f\u6210\u7d22\u5f15,\u6216\u751f\u6210\u7d22\u5f15\u7684\u670d\u52a1\u5668\u5df2\u7ecf\u628a\u7d22\u5f15\u751f\u6210\u5b8c\u6210\u53ef\u4ee5\u641c\u7d22\u63d0\u4f9b\u670d\u52a1\u4e86.\u4f7f\u7528Zookeeper\u53ef\u4ee5\u4fdd\u8bc1\u603b\u670d\u52a1\u5668\u81ea\u52a8<\/p>\n
\u611f\u77e5\u6709\u591a\u5c11\u63d0\u4f9b\u641c\u7d22\u5f15\u64ce\u7684\u670d\u52a1\u5668\u5e76\u5411\u8fd9\u4e9b\u670d\u52a1\u5668\u53d1\u51fa\u641c\u7d22\u8bf7\u6c42,\u5907\u7528\u7684\u603b\u670d\u52a1\u5668\u5b95\u673a\u65f6\u81ea\u52a8\u542f\u7528\u5907\u7528\u7684\u603b\u670d\u52a1\u5668,web\u7684cgi\u80fd\u591f\u81ea\u52a8\u5730\u83b7\u77e5\u603b\u670d\u52a1\u5668\u7684\u7f51\u7edc
\n \u5730\u5740\u53d8\u5316.\u8fd9\u4e9b\u53c8\u5982\u4f55\u505a\u5230\u5462?<\/p>\n<\/p>\n
1. \u63d0\u4f9b\u641c\u7d22\u5f15\u64ce\u7684\u670d\u52a1\u5668\u90fd\u5728Zookeeper\u4e2d\u521b\u5efaznode,zk.create(\"\/search\/nodes\/node1\",<\/p>\n
\"hostname\".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateFlags.EPHEMERAL);<\/p>\n
2.\u603b\u670d\u52a1\u5668\u53ef\u4ee5\u4eceZookeeper\u4e2d\u83b7\u53d6\u4e00\u4e2aznode\u7684\u5b50\u8282\u70b9\u7684\u5217\u8868,zk.getChildren(\"\/search\/nodes\", true);<\/p>\n
3.\u603b\u670d\u52a1\u5668\u904d\u5386\u8fd9\u4e9b\u5b50\u8282\u70b9,\u5e76\u83b7\u53d6\u5b50\u8282\u70b9\u7684\u6570\u636e\u751f\u6210\u63d0\u4f9b\u641c\u7d22\u5f15\u64ce\u7684\u670d\u52a1\u5668\u5217\u8868.<\/p>\n
4.\u5f53\u603b\u670d\u52a1\u5668\u63a5\u6536\u5230\u5b50\u8282\u70b9\u6539\u53d8\u7684\u4e8b\u4ef6\u4fe1\u606f,\u91cd\u65b0\u8fd4\u56de\u7b2c\u4e8c\u6b65.<\/p>\n
5.\u603b\u670d\u52a1\u5668\u5728Zookeeper\u4e2d\u521b\u5efa\u8282\u70b9,zk.create(\"\/search\/master\", \"hostname\".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateFlags.EPHEMERAL);<\/p>\n
6.\u5907\u7528\u7684\u603b\u670d\u52a1\u5668\u76d1\u63a7Zookeeper\u4e2d\u7684\"\/search\/master\"\u8282\u70b9.\u5f53\u8fd9\u4e2aznode\u7684\u8282\u70b9\u6570\u636e\u6539\u53d8\u65f6,\u628a\u81ea\u5df1\u542f\u52a8\u53d8\u6210\u603b\u670d\u52a1\u5668,\u5e76\u628a\u81ea\u5df1\u7684\u7f51\u7edc\u5730\u5740\u6570\u636e\u653e\u8fdb\u8fd9\u4e2a\u8282\u70b9.<\/p>\n
7.web\u7684cgi\u4eceZookeeper\u4e2d\"\/search\/master\"\u8282\u70b9\u83b7\u53d6\u603b\u670d\u52a1\u5668\u7684\u7f51\u7edc\u5730\u5740\u6570\u636e\u5e76\u5411\u5176\u53d1\u9001\u641c\u7d22\u8bf7\u6c42.<\/p>\n
8.web\u7684cgi\u76d1\u63a7Zookeeper\u4e2d\u7684\"\/search\/master\"\u8282\u70b9,\u5f53\u8fd9\u4e2aznode\u7684\u8282\u70b9\u6570\u636e\u6539\u53d8\u65f6,\u4ece\u8fd9\u4e2a\u8282\u70b9\u83b7\u53d6\u603b\u670d\u52a1\u5668\u7684\u7f51\u7edc\u5730\u5740\u6570\u636e,\u5e76\u6539\u53d8\u5f53\u524d\u7684\u603b\u670d\u52a1\u5668\u7684\u7f51\u7edc\u5730\u5740.<\/p>\n
\u5728
\n\u6211\u7684\u6d4b\u8bd5\u4e2d:\u4e00\u4e2aZookeeper\u7684\u96c6\u7fa4\u4e2d,3\u4e2aZookeeper\u8282\u70b9.\u4e00\u4e2aleader,\u4e24\u4e2afollower\u7684\u60c5\u51b5\u4e0b,\u505c\u6389leader,\u7136\u540e\u4e24
\n\u4e2afollower\u9009\u4e3e\u51fa\u4e00\u4e2aleader.\u83b7\u53d6\u7684\u6570\u636e\u4e0d\u53d8.\u6211\u60f3Zookeeper\u80fd\u591f\u5e2e\u52a9Hadoop\u505a\u5230:<\/p>\n<\/p>\n
Hadoop,\u4f7f\u7528Zookeeper\u7684\u4e8b\u4ef6\u5904\u7406\u786e\u4fdd\u6574\u4e2a\u96c6\u7fa4\u53ea\u6709\u4e00\u4e2aNameNode,\u5b58\u50a8\u914d\u7f6e\u4fe1\u606f\u7b49.<\/p>\n
HBase,\u4f7f\u7528Zookeeper\u7684\u4e8b\u4ef6\u5904\u7406\u786e\u4fdd\u6574\u4e2a\u96c6\u7fa4\u53ea\u6709\u4e00\u4e2aHMaster,\u5bdf\u89c9HRegionServer\u8054\u673a\u548c\u5b95\u673a,\u5b58\u50a8\u8bbf\u95ee\u63a7\u5236\u5217\u8868\u7b49.<\/p>\n
<\/a> zookeeper\u662f\u4ec0\u4e48<\/h2>\n
\u5b98\u65b9\u8bf4\u8f9e\uff1aZookeeper \u5206\u5e03\u5f0f\u670d\u52a1\u6846\u67b6\u662fApache Hadoop \u7684\u4e00\u4e2a\u5b50\u9879\u76ee\uff0c\u5b83\u4e3b\u8981\u662f\u7528\u6765\u89e3\u51b3\u5206\u5e03\u5f0f\u5e94\u7528\u4e2d\u7ecf\u5e38\u9047\u5230\u7684\u4e00\u4e9b\u6570\u636e\u7ba1\u7406\u95ee\u9898\uff0c\u5982\uff1a\u7edf\u4e00\u547d\u540d\u670d\u52a1\u3001\u72b6\u6001\u540c\u6b65\u670d\u52a1\u3001\u96c6\u7fa4\u7ba1\u7406\u3001\u5206\u5e03\u5f0f\u5e94\u7528\u914d\u7f6e\u9879\u7684\u7ba1\u7406\u7b49\u3002<\/p>\n
\u597d\u62bd\u8c61\uff0c\u6211\u4eec\u6539\u53d8\u4e00\u4e0b\u65b9\u5f0f\uff0c\u5148\u770b\u770b\u5b83\u90fd\u63d0\u4f9b\u4e86\u54ea\u4e9b\u529f\u80fd\uff0c\u7136\u540e\u518d\u770b\u770b\u4f7f\u7528\u5b83\u7684\u8fd9\u4e9b\u529f\u80fd\u80fd\u505a\u70b9\u4ec0\u4e48\u3002<\/p>\n
<\/a> zookeeper\u63d0\u4f9b\u4e86\u4ec0\u4e48<\/h2>\n
\u7b80\u5355\u7684\u8bf4\uff0czookeeper=\u6587\u4ef6\u7cfb\u7edf+\u901a\u77e5\u673a\u5236\u3002<\/p>\n
<\/a>1\u3001 \u6587\u4ef6\u7cfb\u7edf<\/h3>\n
Zookeeper\u7ef4\u62a4\u4e00\u4e2a\u7c7b\u4f3c\u6587\u4ef6\u7cfb\u7edf\u7684\u6570\u636e\u7ed3\u6784\uff1a<\/p>\n
![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/72691471253195.png\")
<\/a><\/p>\n<\/p>\n
\u6bcf\u4e2a\u5b50\u76ee\u5f55\u9879\u5982 NameService \u90fd\u88ab\u79f0\u4f5c\u4e3a znode\uff0c\u548c\u6587\u4ef6\u7cfb\u7edf\u4e00\u6837\uff0c\u6211\u4eec\u80fd\u591f\u81ea\u7531\u7684\u589e\u52a0\u3001\u5220\u9664znode\uff0c\u5728\u4e00\u4e2aznode\u4e0b\u589e\u52a0\u3001\u5220\u9664\u5b50znode\uff0c\u552f\u4e00\u7684\u4e0d\u540c\u5728\u4e8eznode\u662f\u53ef\u4ee5\u5b58\u50a8\u6570\u636e\u7684\u3002<\/p>\n
\u6709\u56db\u79cd\u7c7b\u578b\u7684znode\uff1a<\/p>\n
1\u3001PERSISTENT-\u6301\u4e45\u5316\u76ee\u5f55\u8282\u70b9<\/p>\n
\u5ba2\u6237\u7aef\u4e0ezookeeper\u65ad\u5f00\u8fde\u63a5\u540e\uff0c\u8be5\u8282\u70b9\u4f9d\u65e7\u5b58\u5728<\/p>\n
2\u3001 PERSISTENT_SEQUENTIAL-\u6301\u4e45\u5316\u987a\u5e8f\u7f16\u53f7\u76ee\u5f55\u8282\u70b9<\/p>\n
\u5ba2\u6237\u7aef\u4e0ezookeeper\u65ad\u5f00\u8fde\u63a5\u540e\uff0c\u8be5\u8282\u70b9\u4f9d\u65e7\u5b58\u5728\uff0c\u53ea\u662fZookeeper\u7ed9\u8be5\u8282\u70b9\u540d\u79f0\u8fdb\u884c\u987a\u5e8f\u7f16\u53f7<\/p>\n
3\u3001EPHEMERAL-\u4e34\u65f6\u76ee\u5f55\u8282\u70b9<\/p>\n
\u5ba2\u6237\u7aef\u4e0ezookeeper\u65ad\u5f00\u8fde\u63a5\u540e\uff0c\u8be5\u8282\u70b9\u88ab\u5220\u9664<\/p>\n
4\u3001EPHEMERAL_SEQUENTIAL-\u4e34\u65f6\u987a\u5e8f\u7f16\u53f7\u76ee\u5f55\u8282\u70b9<\/p>\n
\u5ba2\u6237\u7aef\u4e0ezookeeper\u65ad\u5f00\u8fde\u63a5\u540e\uff0c\u8be5\u8282\u70b9\u88ab\u5220\u9664\uff0c\u53ea\u662fZookeeper\u7ed9\u8be5\u8282\u70b9\u540d\u79f0\u8fdb\u884c\u987a\u5e8f\u7f16\u53f7<\/p>\n
<\/p>\n
<\/a>2\u3001 \u901a\u77e5\u673a\u5236<\/h3>\n
\u5ba2\u6237\u7aef\u6ce8\u518c\u76d1\u542c\u5b83\u5173\u5fc3\u7684\u76ee\u5f55\u8282\u70b9\uff0c\u5f53\u76ee\u5f55\u8282\u70b9\u53d1\u751f\u53d8\u5316\uff08\u6570\u636e\u6539\u53d8\u3001\u88ab\u5220\u9664\u3001\u5b50\u76ee\u5f55\u8282\u70b9\u589e\u52a0\u5220\u9664\uff09\u65f6\uff0czookeeper\u4f1a\u901a\u77e5\u5ba2\u6237\u7aef\u3002 <\/p>\n
\u5c31\u8fd9\u4e48\u7b80\u5355\uff0c\u4e0b\u9762\u6211\u4eec\u770b\u770b\u80fd\u505a\u70b9\u4ec0\u4e48\u5462\uff1f<\/p>\n
<\/p>\n
<\/a>\u6211\u4eec\u80fd\u7528zookeeper\u505a\u4ec0\u4e48<\/h2>\n
<\/a>1\u3001 \u547d\u540d\u670d\u52a1<\/h3>\n
\u8fd9\u4e2a\u4f3c\u4e4e\u6700\u7b80\u5355\uff0c\u5728zookeeper\u7684\u6587\u4ef6\u7cfb\u7edf\u91cc\u521b\u5efa\u4e00\u4e2a\u76ee\u5f55\uff0c\u5373\u6709\u552f\u4e00\u7684path\u3002\u5728\u6211\u4eec\u4f7f\u7528tborg\u65e0\u6cd5\u786e\u5b9a\u4e0a\u6e38\u7a0b\u5e8f\u7684\u90e8\u7f72\u673a\u5668\u65f6\u5373\u53ef\u4e0e\u4e0b\u6e38\u7a0b\u5e8f\u7ea6\u5b9a\u597dpath\uff0c\u901a\u8fc7path\u5373\u80fd\u4e92\u76f8\u63a2\u7d22\u53d1\u73b0\uff0c\u4e0d\u89c1\u4e0d\u6563\u4e86\u3002<\/p>\n
<\/p>\n
<\/a>2\u3001 \u914d\u7f6e\u7ba1\u7406<\/h3>\n
\u7a0b
\n\u5e8f\u603b\u662f\u9700\u8981\u914d\u7f6e\u7684\uff0c\u5982\u679c\u7a0b\u5e8f\u5206\u6563\u90e8\u7f72\u5728\u591a\u53f0\u673a\u5668\u4e0a\uff0c\u8981\u9010\u4e2a\u6539\u53d8\u914d\u7f6e\u5c31\u53d8\u5f97\u56f0\u96be\u3002\u597d\u5427\uff0c\u73b0\u5728\u628a\u8fd9\u4e9b\u914d\u7f6e\u5168\u90e8\u653e\u5230zookeeper\u4e0a\u53bb\uff0c\u4fdd\u5b58\u5728
\nZookeeper \u7684\u67d0\u4e2a\u76ee\u5f55\u8282\u70b9\u4e2d\uff0c\u7136\u540e\u6240\u6709\u76f8\u5173\u5e94\u7528\u7a0b\u5e8f\u5bf9\u8fd9\u4e2a\u76ee\u5f55\u8282\u70b9\u8fdb\u884c\u76d1\u542c\uff0c\u4e00\u65e6\u914d\u7f6e\u4fe1\u606f\u53d1\u751f\u53d8\u5316\uff0c\u6bcf\u4e2a\u5e94\u7528\u7a0b\u5e8f\u5c31\u4f1a\u6536\u5230 Zookeeper
\n \u7684\u901a\u77e5\uff0c\u7136\u540e\u4ece Zookeeper \u83b7\u53d6\u65b0\u7684\u914d\u7f6e\u4fe1\u606f\u5e94\u7528\u5230\u7cfb\u7edf\u4e2d\u5c31\u597d\u3002<\/p>\n![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/c2551471253196.png\")
<\/a><\/p>\n<\/p>\n
<\/a>3\u3001 \u96c6\u7fa4\u7ba1\u7406<\/h3>\n
\u6240\u8c13\u96c6\u7fa4\u7ba1\u7406\u65e0\u5728\u4e4e\u4e24\u70b9\uff1a\u662f\u5426\u6709\u673a\u5668\u9000\u51fa\u548c\u52a0\u5165\u3001\u9009\u4e3emaster\u3002<\/p>\n
\u5bf9
\n\u4e8e\u7b2c\u4e00\u70b9\uff0c\u6240\u6709\u673a\u5668\u7ea6\u5b9a\u5728\u7236\u76ee\u5f55GroupMembers\u4e0b\u521b\u5efa\u4e34\u65f6\u76ee\u5f55\u8282\u70b9\uff0c\u7136\u540e\u76d1\u542c\u7236\u76ee\u5f55\u8282\u70b9\u7684\u5b50\u8282\u70b9\u53d8\u5316\u6d88\u606f\u3002\u4e00\u65e6\u6709\u673a\u5668\u6302\u6389\uff0c\u8be5\u673a\u5668\u4e0e
\nzookeeper\u7684\u8fde\u63a5\u65ad\u5f00\uff0c\u5176\u6240\u521b\u5efa\u7684\u4e34\u65f6\u76ee\u5f55\u8282\u70b9\u88ab\u5220\u9664\uff0c\u6240\u6709\u5176\u4ed6\u673a\u5668\u90fd\u6536\u5230\u901a\u77e5\uff1a\u67d0\u4e2a\u5144\u5f1f\u76ee\u5f55\u88ab\u5220\u9664\uff0c\u4e8e\u662f\uff0c\u6240\u6709\u4eba\u90fd\u77e5\u9053\uff1a\u5b83\u4e0a\u8239\u4e86\u3002\u65b0\u673a\u5668\u52a0\u5165
\n \u4e5f\u662f\u7c7b\u4f3c\uff0c\u6240\u6709\u673a\u5668\u6536\u5230\u901a\u77e5\uff1a\u65b0\u5144\u5f1f\u76ee\u5f55\u52a0\u5165\uff0chighcount\u53c8\u6709\u4e86\u3002<\/p>\n\u5bf9\u4e8e\u7b2c\u4e8c\u70b9\uff0c\u6211\u4eec\u7a0d\u5fae\u6539\u53d8\u4e00\u4e0b\uff0c\u6240\u6709\u673a\u5668\u521b\u5efa\u4e34\u65f6\u987a\u5e8f\u7f16\u53f7\u76ee\u5f55\u8282\u70b9\uff0c\u6bcf\u6b21\u9009\u53d6\u7f16\u53f7\u6700\u5c0f\u7684\u673a\u5668\u4f5c\u4e3amaster\u5c31\u597d\u3002<\/p>\n
![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/34681471253196.png\")
<\/a><\/p>\n<\/p>\n
4\u3001 \u5206\u5e03\u5f0f\u9501<\/span><\/p>\n
\u6709\u4e86zookeeper\u7684\u4e00\u81f4\u6027\u6587\u4ef6\u7cfb\u7edf\uff0c\u9501\u7684\u95ee\u9898\u53d8\u5f97\u5bb9\u6613\u3002\u9501\u670d\u52a1\u53ef\u4ee5\u5206\u4e3a\u4e24\u7c7b\uff0c\u4e00\u4e2a\u662f\u4fdd\u6301\u72ec\u5360\uff0c\u53e6\u4e00\u4e2a\u662f\u63a7\u5236\u65f6\u5e8f\u3002<\/p>\n
\u5bf9
\n\u4e8e\u7b2c\u4e00\u7c7b\uff0c\u6211\u4eec\u5c06zookeeper\u4e0a\u7684\u4e00\u4e2aznode\u770b\u4f5c\u662f\u4e00\u628a\u9501\uff0c\u901a\u8fc7createznode\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002\u6240\u6709\u5ba2\u6237\u7aef\u90fd\u53bb\u521b\u5efa
\n\/distribute_lock
\n\u8282\u70b9\uff0c\u6700\u7ec8\u6210\u529f\u521b\u5efa\u7684\u90a3\u4e2a\u5ba2\u6237\u7aef\u4e5f\u5373\u62e5\u6709\u4e86\u8fd9\u628a\u9501\u3002\u5395\u6240\u6709\u8a00\uff1a\u6765\u4e5f\u51b2\u51b2\uff0c\u53bb\u4e5f\u51b2\u51b2\uff0c\u7528\u5b8c\u5220\u9664\u6389\u81ea\u5df1\u521b\u5efa\u7684distribute_lock
\n\u8282\u70b9\u5c31\u91ca\u653e\u51fa\u9501\u3002<\/p>\n\u5bf9\u4e8e\u7b2c\u4e8c\u7c7b\uff0c \/distribute_lock \u5df2\u7ecf\u9884\u5148\u5b58\u5728\uff0c\u6240\u6709\u5ba2\u6237\u7aef\u5728\u5b83\u4e0b\u9762\u521b\u5efa\u4e34\u65f6\u987a\u5e8f\u7f16\u53f7\u76ee\u5f55\u8282\u70b9\uff0c\u548c\u9009master\u4e00\u6837\uff0c\u7f16\u53f7\u6700\u5c0f\u7684\u83b7\u5f97\u9501\uff0c\u7528\u5b8c\u5220\u9664\uff0c\u4f9d\u6b21\u65b9\u4fbf\u3002<\/p>\n
![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/db8f1471253197.png\")
<\/a><\/p>\n5\u3001\u961f\u5217\u7ba1\u7406<\/span><\/p>\n
\u4e24\u79cd\u7c7b\u578b\u7684\u961f\u5217\uff1a<\/p>\n
1\u3001 \u540c\u6b65\u961f\u5217\uff0c\u5f53\u4e00\u4e2a\u961f\u5217\u7684\u6210\u5458\u90fd\u805a\u9f50\u65f6\uff0c\u8fd9\u4e2a\u961f\u5217\u624d\u53ef\u7528\uff0c\u5426\u5219\u4e00\u76f4\u7b49\u5f85\u6240\u6709\u6210\u5458\u5230\u8fbe\u3002<\/p>\n
2\u3001\u961f\u5217\u6309\u7167 FIFO \u65b9\u5f0f\u8fdb\u884c\u5165\u961f\u548c\u51fa\u961f\u64cd\u4f5c\u3002<\/p>\n
\u7b2c\u4e00\u7c7b\uff0c\u5728\u7ea6\u5b9a\u76ee\u5f55\u4e0b\u521b\u5efa\u4e34\u65f6\u76ee\u5f55\u8282\u70b9\uff0c\u76d1\u542c\u8282\u70b9\u6570\u76ee\u662f\u5426\u662f\u6211\u4eec\u8981\u6c42\u7684\u6570\u76ee\u3002<\/p>\n
\u7b2c\u4e8c\u7c7b\uff0c\u548c\u5206\u5e03\u5f0f\u9501\u670d\u52a1\u4e2d\u7684\u63a7\u5236\u65f6\u5e8f\u573a\u666f\u57fa\u672c\u539f\u7406\u4e00\u81f4\uff0c\u5165\u5217\u6709\u7f16\u53f7\uff0c\u51fa\u5217\u6309\u7f16\u53f7\u3002 <\/p>\n
\u7ec8\u4e8e\u4e86\u89e3\u5b8c\u6211\u4eec\u80fd\u7528zookeeper\u505a\u4ec0\u4e48\u4e86\uff0c\u53ef\u662f\u4f5c\u4e3a\u4e00\u4e2a\u7a0b\u5e8f\u5458\uff0c\u6211\u4eec\u603b\u662f\u60f3\u72c2\u70ed\u4e86\u89e3zookeeper\u662f\u5982\u4f55\u505a\u5230\u8fd9\u4e00\u70b9\u7684\uff0c\u5355\u70b9\u7ef4\u62a4\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf\u6ca1\u6709\u4ec0\u4e48\u96be\u5ea6\uff0c\u53ef\u662f\u5982\u679c\u662f\u4e00\u4e2a\u96c6\u7fa4\u7ef4\u62a4\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf\u4fdd\u6301\u6570\u636e\u7684\u4e00\u81f4\u6027\u5c31\u975e\u5e38\u56f0\u96be\u4e86\u3002<\/p>\n
<\/p>\n
<\/a>\u5206\u5e03\u5f0f\u4e0e\u6570\u636e\u590d\u5236<\/h3>\n
Zookeeper\u4f5c\u4e3a\u4e00\u4e2a\u96c6\u7fa4\u63d0\u4f9b\u4e00\u81f4\u7684\u6570\u636e\u670d\u52a1\uff0c\u81ea\u7136\uff0c\u5b83\u8981\u5728\u6240\u6709\u673a\u5668\u95f4\u505a\u6570\u636e\u590d\u5236\u3002\u6570\u636e\u590d\u5236\u7684\u597d\u5904\uff1a<\/p>\n
1\u3001 \u5bb9\u9519
\n\u4e00\u4e2a\u8282\u70b9\u51fa\u9519\uff0c\u4e0d\u81f4\u4e8e\u8ba9\u6574\u4e2a\u7cfb\u7edf\u505c\u6b62\u5de5\u4f5c\uff0c\u522b\u7684\u8282\u70b9\u53ef\u4ee5\u63a5\u7ba1\u5b83\u7684\u5de5\u4f5c\uff1b<\/p>\n2\u3001\u63d0\u9ad8\u7cfb\u7edf\u7684\u6269\u5c55\u80fd\u529b
\n\u628a\u8d1f\u8f7d\u5206\u5e03\u5230\u591a\u4e2a\u8282\u70b9\u4e0a\uff0c\u6216\u8005\u589e\u52a0\u8282\u70b9\u6765\u63d0\u9ad8\u7cfb\u7edf\u7684\u8d1f\u8f7d\u80fd\u529b\uff1b<\/p>\n3\u3001\u63d0\u9ad8\u6027\u80fd
\n\u8ba9\u5ba2\u6237\u7aef\u672c\u5730\u8bbf\u95ee\u5c31\u8fd1\u7684\u8282\u70b9\uff0c\u63d0\u9ad8\u7528\u6237\u8bbf\u95ee\u901f\u5ea6\u3002<\/p>\n<\/p>\n
\u4ece\u5ba2\u6237\u7aef\u8bfb\u5199\u8bbf\u95ee\u7684\u900f\u660e\u5ea6\u6765\u770b\uff0c\u6570\u636e\u590d\u5236\u96c6\u7fa4\u7cfb\u7edf\u5206\u4e0b\u9762\u4e24\u79cd\uff1a<\/p>\n
1\u3001\u5199\u4e3b(WriteMaster)
\n\u5bf9\u6570\u636e\u7684\u4fee\u6539\u63d0\u4ea4\u7ed9\u6307\u5b9a\u7684\u8282\u70b9\u3002\u8bfb\u65e0\u6b64\u9650\u5236\uff0c\u53ef\u4ee5\u8bfb\u53d6\u4efb\u4f55\u4e00\u4e2a\u8282\u70b9\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5ba2\u6237\u7aef\u9700\u8981\u5bf9\u8bfb\u4e0e\u5199\u8fdb\u884c\u533a\u522b\uff0c\u4fd7\u79f0\u8bfb\u5199\u5206\u79bb\uff1b<\/p>\n2\u3001\u5199\u4efb\u610f(Write Any)
\n\u5bf9\u6570\u636e\u7684\u4fee\u6539\u53ef\u63d0\u4ea4\u7ed9\u4efb\u610f\u7684\u8282\u70b9\uff0c\u8ddf\u8bfb\u4e00\u6837\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u7aef\u5bf9\u96c6\u7fa4\u8282\u70b9\u7684\u89d2\u8272\u4e0e\u53d8\u5316\u900f\u660e\u3002<\/p>\n<\/p>\n
\u5bf9
\nzookeeper\u6765\u8bf4\uff0c\u5b83\u91c7\u7528\u7684\u65b9\u5f0f\u662f\u5199\u4efb\u610f\u3002\u901a\u8fc7\u589e\u52a0\u673a\u5668\uff0c\u5b83\u7684\u8bfb\u541e\u5410\u80fd\u529b\u548c\u54cd\u5e94\u80fd\u529b\u6269\u5c55\u6027\u975e\u5e38\u597d\uff0c\u800c\u5199\uff0c\u968f\u7740\u673a\u5668\u7684\u589e\u591a\u541e\u5410\u80fd\u529b\u80af\u5b9a\u4e0b\u964d\uff08\u8fd9
\n\u4e5f\u662f\u5b83\u5efa\u7acbobserver\u7684\u539f\u56e0\uff09\uff0c\u800c\u54cd\u5e94\u80fd\u529b\u5219\u53d6\u51b3\u4e8e\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\uff0c\u662f\u5ef6\u8fdf\u590d\u5236\u4fdd\u6301\u6700\u7ec8\u4e00\u81f4\u6027\uff0c\u8fd8\u662f\u7acb\u5373\u590d\u5236\u5feb\u901f\u54cd\u5e94\u3002<\/p>\n\u6211\u4eec\u5173\u6ce8\u7684\u91cd\u70b9\u8fd8\u662f\u5728\u5982\u4f55\u4fdd\u8bc1\u6570\u636e\u5728\u96c6\u7fa4\u6240\u6709\u673a\u5668\u7684\u4e00\u81f4\u6027\uff0c\u8fd9\u5c31\u6d89\u53ca\u5230paxos\u7b97\u6cd5\u3002<\/p>\n
<\/p>\n
<\/a>\u6570\u636e\u4e00\u81f4\u6027\u4e0epaxos\u7b97\u6cd5<\/h3>\n
\u636e\u8bf4Paxos\u7b97\u6cd5\u7684\u96be\u7406\u89e3\u4e0e\u7b97\u6cd5\u7684\u77e5\u540d\u5ea6\u4e00\u6837\u4ee4\u4eba\u656c\u4ef0\uff0c\u6240\u4ee5\u6211\u4eec\u5148\u770b\u5982\u4f55\u4fdd\u6301\u6570\u636e\u7684\u4e00\u81f4\u6027\uff0c\u8fd9\u91cc\u6709\u4e2a\u539f\u5219\u5c31\u662f\uff1a<\/p>\n
\u5728\u4e00\u4e2a\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7cfb\u7edf\u4e2d\uff0c\u5982\u679c\u5404\u8282\u70b9\u7684\u521d\u59cb\u72b6\u6001\u4e00\u81f4\uff0c\u6bcf\u4e2a\u8282\u70b9\u90fd\u6267\u884c\u76f8\u540c\u7684\u64cd\u4f5c\u5e8f\u5217\uff0c\u90a3\u4e48\u4ed6\u4eec\u6700\u540e\u80fd\u5f97\u5230\u4e00\u4e2a\u4e00\u81f4\u7684\u72b6\u6001\u3002<\/span><\/span><\/p>\n
Paxos
\n\u7b97\u6cd5\u89e3\u51b3\u7684\u4ec0\u4e48\u95ee\u9898\u5462\uff0c\u89e3\u51b3\u7684\u5c31\u662f\u4fdd\u8bc1\u6bcf\u4e2a\u8282\u70b9\u6267\u884c\u76f8\u540c\u7684\u64cd\u4f5c\u5e8f\u5217\u3002\u597d\u5427\uff0c\u8fd9\u8fd8\u4e0d\u7b80\u5355\uff0cmaster\u7ef4\u62a4\u4e00\u4e2a\u5168\u5c40\u5199\u961f\u5217\uff0c\u6240\u6709\u5199\u64cd\u4f5c\u90fd\u5fc5\u987b
\n\u653e\u5165\u8fd9\u4e2a\u961f\u5217\u7f16\u53f7\uff0c\u90a3\u4e48\u65e0\u8bba\u6211\u4eec\u5199\u591a\u5c11\u4e2a\u8282\u70b9\uff0c\u53ea\u8981\u5199\u64cd\u4f5c\u662f\u6309\u7f16\u53f7\u6765\u7684\uff0c\u5c31\u80fd\u4fdd\u8bc1\u4e00\u81f4\u6027\u3002\u6ca1\u9519\uff0c\u5c31\u662f\u8fd9\u6837\uff0c\u53ef\u662f\u5982\u679cmaster\u6302\u4e86\u5462\u3002<\/p>\nPaxos
\n\u7b97\u6cd5\u901a\u8fc7\u6295\u7968\u6765\u5bf9\u5199\u64cd\u4f5c\u8fdb\u884c\u5168\u5c40\u7f16\u53f7\uff0c\u540c\u4e00\u65f6\u523b\uff0c\u53ea\u6709\u4e00\u4e2a\u5199\u64cd\u4f5c\u88ab\u6279\u51c6\uff0c\u540c\u65f6\u5e76\u53d1\u7684\u5199\u64cd\u4f5c\u8981\u53bb\u4e89\u53d6\u9009\u7968\uff0c\u53ea\u6709\u83b7\u5f97\u8fc7\u534a\u6570\u9009\u7968\u7684\u5199\u64cd\u4f5c\u624d\u4f1a\u88ab
\n\u6279\u51c6\uff08\u6240\u4ee5\u6c38\u8fdc\u53ea\u4f1a\u6709\u4e00\u4e2a\u5199\u64cd\u4f5c\u5f97\u5230\u6279\u51c6\uff09\uff0c\u5176\u4ed6\u7684\u5199\u64cd\u4f5c\u7ade\u4e89\u5931\u8d25\u53ea\u597d\u518d\u53d1\u8d77\u4e00\u8f6e\u6295\u7968\uff0c\u5c31\u8fd9\u6837\uff0c\u5728\u65e5\u590d\u4e00\u65e5\u5e74\u590d\u4e00\u5e74\u7684\u6295\u7968\u4e2d\uff0c\u6240\u6709\u5199\u64cd\u4f5c\u90fd\u88ab\u4e25\u683c\u7f16\u53f7\u6392
\n\u5e8f\u3002\u7f16\u53f7\u4e25\u683c\u9012\u589e\uff0c\u5f53\u4e00\u4e2a\u8282\u70b9\u63a5\u53d7\u4e86\u4e00\u4e2a\u7f16\u53f7\u4e3a100\u7684\u5199\u64cd\u4f5c\uff0c\u4e4b\u540e\u53c8\u63a5\u53d7\u5230\u7f16\u53f7\u4e3a99\u7684\u5199\u64cd\u4f5c\uff08\u56e0\u4e3a\u7f51\u7edc\u5ef6\u8fdf\u7b49\u5f88\u591a\u4e0d\u53ef\u9884\u89c1\u539f\u56e0\uff09\uff0c\u5b83\u9a6c\u4e0a\u80fd\u610f\u8bc6\u5230\u81ea\u5df1
\n \u6570\u636e\u4e0d\u4e00\u81f4\u4e86\uff0c\u81ea\u52a8\u505c\u6b62\u5bf9\u5916\u670d\u52a1\u5e76\u91cd\u542f\u540c\u6b65\u8fc7\u7a0b\u3002\u4efb\u4f55\u4e00\u4e2a\u8282\u70b9\u6302\u6389\u90fd\u4e0d\u4f1a\u5f71\u54cd\u6574\u4e2a\u96c6\u7fa4\u7684\u6570\u636e\u4e00\u81f4\u6027\uff08\u603b2n+1\u53f0\uff0c\u9664\u975e\u6302\u6389\u5927\u4e8en\u53f0\uff09\u3002<\/p>\n\u603b\u7ed3<\/p>\n
Zookeeper
\n \u4f5c\u4e3a Hadoop \u9879\u76ee\u4e2d\u7684\u4e00\u4e2a\u5b50\u9879\u76ee\uff0c\u662f Hadoop \u96c6\u7fa4\u7ba1\u7406\u7684\u4e00\u4e2a\u5fc5\u4e0d\u53ef\u5c11\u7684\u6a21\u5757\uff0c\u5b83\u4e3b\u8981\u7528\u6765\u63a7\u5236\u96c6\u7fa4\u4e2d\u7684\u6570\u636e\uff0c\u5982\u5b83\u7ba1\u7406 Hadoop
\n\u96c6\u7fa4\u4e2d\u7684 NameNode\uff0c\u8fd8\u6709 Hbase \u4e2d Master Election\u3001Server \u4e4b\u95f4\u72b6\u6001\u540c\u6b65\u7b49\u3002<\/p>\n<\/p>\n
Zookeeper\u5de5\u4f5c\u539f\u7406<\/span><\/a><\/p>\n
ZooKeeper
\n\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684\uff0c\u5f00\u653e\u6e90\u7801\u7684\u5206\u5e03\u5f0f\u5e94\u7528\u7a0b\u5e8f\u534f\u8c03\u670d\u52a1\uff0c\u5b83\u5305\u542b\u4e00\u4e2a\u7b80\u5355\u7684\u539f\u8bed\u96c6\uff0c\u5206\u5e03\u5f0f\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u57fa\u4e8e\u5b83\u5b9e\u73b0\u540c\u6b65\u670d\u52a1\uff0c\u914d\u7f6e\u7ef4\u62a4\u548c
\n\u547d\u540d\u670d\u52a1\u7b49\u3002Zookeeper\u662fhadoop\u7684\u4e00\u4e2a\u5b50\u9879\u76ee\uff0c\u5176\u53d1\u5c55\u5386\u7a0b\u65e0\u9700\u8d58\u8ff0\u3002\u5728\u5206\u5e03\u5f0f\u5e94\u7528\u4e2d\uff0c\u7531\u4e8e\u5de5\u7a0b\u5e08\u4e0d\u80fd\u5f88\u597d\u5730\u4f7f\u7528\u9501\u673a\u5236\uff0c\u4ee5\u53ca\u57fa\u4e8e\u6d88\u606f\u7684\u534f\u8c03<\/p>\n\u673a\u5236\u4e0d\u9002\u5408\u5728\u67d0\u4e9b\u5e94\u7528\u4e2d\u4f7f\u7528\uff0c\u56e0\u6b64\u9700\u8981\u6709\u4e00\u79cd\u53ef\u9760\u7684\u3001\u53ef\u6269\u5c55\u7684\u3001\u5206\u5e03\u5f0f\u7684\u3001\u53ef\u914d\u7f6e\u7684\u534f\u8c03\u673a\u5236\u6765\u7edf\u4e00\u7cfb\u7edf\u7684\u72b6\u6001\u3002Zookeeper\u7684\u76ee\u7684\u5c31\u5728\u4e8e\u6b64\u3002\u672c\u6587\u7b80
\n \u5355\u5206\u6790zookeeper\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u5bf9\u4e8e\u5982\u4f55\u4f7f\u7528zookeeper\u4e0d\u662f\u672c\u6587\u8ba8\u8bba\u7684\u91cd\u70b9\u3002<\/p>\n<\/a>Zookeeper\u7684\u57fa\u672c\u6982\u5ff5<\/h1>\n
<\/a>1.1 \u89d2\u8272<\/h2>\n
Zookeeper\u4e2d\u7684\u89d2\u8272\u4e3b\u8981\u6709\u4ee5\u4e0b\u4e09\u7c7b\uff0c\u5982\u4e0b\u8868\u6240\u793a\uff1a<\/p>\n
![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/e17c1471253198.png\")
<\/a><\/p>\n\u7cfb\u7edf\u6a21\u578b\u5982\u56fe\u6240\u793a\uff1a<\/p>\n
![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/56701471253199.jpg\")
<\/a>
\n <\/p>\n<\/a>1.2 \u8bbe\u8ba1\u76ee\u7684<\/h2>\n
1.\u6700\u7ec8\u4e00\u81f4\u6027\uff1aclient\u4e0d\u8bba\u8fde\u63a5\u5230\u54ea\u4e2aServer\uff0c\u5c55\u793a\u7ed9\u5b83\u90fd\u662f\u540c\u4e00\u4e2a\u89c6\u56fe\uff0c\u8fd9\u662fzookeeper\u6700\u91cd\u8981\u7684\u6027\u80fd\u3002<\/p>\n
2 .\u53ef\u9760\u6027\uff1a\u5177\u6709\u7b80\u5355\u3001\u5065\u58ee\u3001\u826f\u597d\u7684\u6027\u80fd\uff0c\u5982\u679c\u6d88\u606fm\u88ab\u5230\u4e00\u53f0\u670d\u52a1\u5668\u63a5\u53d7\uff0c\u90a3\u4e48\u5b83\u5c06\u88ab\u6240\u6709\u7684\u670d\u52a1\u5668\u63a5\u53d7\u3002<\/p>\n
3 .\u5b9e\u65f6\u6027\uff1aZookeeper\u4fdd\u8bc1\u5ba2\u6237\u7aef\u5c06\u5728\u4e00\u4e2a\u65f6\u95f4\u95f4\u9694\u8303\u56f4\u5185\u83b7\u5f97\u670d\u52a1\u5668\u7684\u66f4\u65b0\u4fe1\u606f\uff0c\u6216\u8005\u670d\u52a1\u5668\u5931\u6548\u7684\u4fe1\u606f\u3002\u4f46\u7531\u4e8e\u7f51\u7edc\u5ef6\u65f6\u7b49\u539f\u56e0\uff0cZookeeper\u4e0d\u80fd\u4fdd\u8bc1\u4e24\u4e2a\u5ba2\u6237\u7aef\u80fd\u540c\u65f6\u5f97\u5230\u521a\u66f4\u65b0\u7684\u6570\u636e\uff0c\u5982\u679c\u9700\u8981\u6700\u65b0\u6570\u636e\uff0c\u5e94\u8be5\u5728\u8bfb\u6570\u636e\u4e4b\u524d\u8c03\u7528sync()\u63a5\u53e3\u3002<\/p>\n
4 .\u7b49\u5f85\u65e0\u5173\uff08wait-free\uff09\uff1a\u6162\u7684\u6216\u8005\u5931\u6548\u7684client\u4e0d\u5f97\u5e72\u9884\u5feb\u901f\u7684client\u7684\u8bf7\u6c42\uff0c\u4f7f\u5f97\u6bcf\u4e2aclient\u90fd\u80fd\u6709\u6548\u7684\u7b49\u5f85\u3002<\/p>\n
5.\u539f\u5b50\u6027\uff1a\u66f4\u65b0\u53ea\u80fd\u6210\u529f\u6216\u8005\u5931\u8d25\uff0c\u6ca1\u6709\u4e2d\u95f4\u72b6\u6001\u3002<\/p>\n
6 .\u987a\u5e8f\u6027\uff1a\u5305\u62ec\u5168\u5c40\u6709\u5e8f\u548c\u504f\u5e8f\u4e24\u79cd\uff1a\u5168\u5c40\u6709\u5e8f\u662f\u6307\u5982\u679c\u5728\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\u6d88\u606fa\u5728\u6d88\u606fb\u524d\u53d1\u5e03\uff0c\u5219\u5728\u6240\u6709Server\u4e0a\u6d88\u606fa\u90fd\u5c06\u5728\u6d88\u606fb\u524d\u88ab\u53d1\u5e03\uff1b\u504f\u5e8f\u662f\u6307\u5982\u679c\u4e00\u4e2a\u6d88\u606fb\u5728\u6d88\u606fa\u540e\u88ab\u540c\u4e00\u4e2a\u53d1\u9001\u8005\u53d1\u5e03\uff0ca\u5fc5\u5c06\u6392\u5728b\u524d\u9762\u3002<\/p>\n
<\/a> ZooKeeper\u7684\u5de5\u4f5c\u539f\u7406<\/h1>\n
Zookeeper
\n\u7684\u6838\u5fc3\u662f\u539f\u5b50\u5e7f\u64ad\uff0c\u8fd9\u4e2a\u673a\u5236\u4fdd\u8bc1\u4e86\u5404\u4e2aServer\u4e4b\u95f4\u7684\u540c\u6b65\u3002\u5b9e\u73b0\u8fd9\u4e2a\u673a\u5236\u7684\u534f\u8bae\u53eb\u505aZab\u534f\u8bae\u3002Zab\u534f\u8bae\u6709\u4e24\u79cd\u6a21\u5f0f\uff0c\u5b83\u4eec\u5206
\n\u522b\u662f\u6062\u590d\u6a21\u5f0f\uff08\u9009\u4e3b\uff09\u548c\u5e7f\u64ad\u6a21\u5f0f\uff08\u540c\u6b65\uff09\u3002\u5f53\u670d\u52a1\u542f\u52a8\u6216\u8005\u5728\u9886\u5bfc\u8005\u5d29\u6e83\u540e\uff0cZab\u5c31\u8fdb\u5165\u4e86\u6062\u590d\u6a21\u5f0f\uff0c\u5f53\u9886\u5bfc\u8005\u88ab\u9009\u4e3e\u51fa\u6765\uff0c\u4e14\u5927\u591a\u6570Server\u5b8c\u6210\u4e86\u548c
\nleader\u7684\u72b6\u6001\u540c\u6b65\u4ee5\u540e\uff0c\u6062\u590d\u6a21\u5f0f\u5c31\u7ed3\u675f\u4e86\u3002\u72b6\u6001\u540c\u6b65\u4fdd\u8bc1\u4e86leader\u548cServer\u5177\u6709\u76f8\u540c\u7684\u7cfb\u7edf\u72b6\u6001\u3002<\/p>\n\u4e3a
\n\u4e86\u4fdd\u8bc1\u4e8b\u52a1\u7684\u987a\u5e8f\u4e00\u81f4\u6027\uff0czookeeper\u91c7\u7528\u4e86\u9012\u589e\u7684\u4e8b\u52a1id\u53f7\uff08zxid\uff09\u6765\u6807\u8bc6\u4e8b\u52a1\u3002\u6240\u6709\u7684\u63d0\u8bae\uff08proposal\uff09\u90fd\u5728\u88ab\u63d0\u51fa\u7684\u65f6\u5019\u52a0\u4e0a
\n\u4e86zxid\u3002\u5b9e\u73b0\u4e2dzxid\u662f\u4e00\u4e2a64\u4f4d\u7684\u6570\u5b57\uff0c\u5b83\u9ad832\u4f4d\u662fepoch\u7528\u6765\u6807\u8bc6leader\u5173\u7cfb\u662f\u5426\u6539\u53d8\uff0c\u6bcf\u6b21\u4e00\u4e2aleader\u88ab\u9009\u51fa\u6765\uff0c\u5b83\u90fd\u4f1a\u6709\u4e00\u4e2a
\n \u65b0\u7684epoch\uff0c\u6807\u8bc6\u5f53\u524d\u5c5e\u4e8e\u90a3\u4e2aleader\u7684\u7edf\u6cbb\u65f6\u671f\u3002\u4f4e32\u4f4d\u7528\u4e8e\u9012\u589e\u8ba1\u6570\u3002<\/p>\n\u6bcf\u4e2aServer\u5728\u5de5\u4f5c\u8fc7\u7a0b\u4e2d\u6709\u4e09\u79cd\u72b6\u6001\uff1a<\/p>\n
- \n
- LOOKING\uff1a\u5f53\u524dServer\u4e0d\u77e5\u9053leader\u662f\u8c01\uff0c\u6b63\u5728\u641c\u5bfb<\/li>\n
- LEADING\uff1a\u5f53\u524dServer\u5373\u4e3a\u9009\u4e3e\u51fa\u6765\u7684leader<\/li>\n
- FOLLOWING\uff1aleader\u5df2\u7ecf\u9009\u4e3e\u51fa\u6765\uff0c\u5f53\u524dServer\u4e0e\u4e4b\u540c\u6b65<\/li>\n<\/ul>\n
<\/a>2.1 \u9009\u4e3b\u6d41\u7a0b<\/h2>\n
\n
\n\u5f53leader\u5d29\u6e83\u6216\u8005leader\u5931\u53bb\u5927\u591a\u6570\u7684follower\uff0c\u8fd9\u65f6\u5019zk\u8fdb\u5165\u6062\u590d\u6a21\u5f0f\uff0c\u6062\u590d\u6a21\u5f0f\u9700\u8981\u91cd\u65b0\u9009\u4e3e\u51fa\u4e00\u4e2a\u65b0\u7684leader\uff0c\u8ba9\u6240\u6709\u7684
\nServer\u90fd\u6062\u590d\u5230\u4e00\u4e2a\u6b63\u786e\u7684\u72b6\u6001\u3002Zk\u7684\u9009\u4e3e\u7b97\u6cd5\u6709\u4e24\u79cd\uff1a\u4e00\u79cd\u662f\u57fa\u4e8ebasic paxos\u5b9e\u73b0\u7684\uff0c\u53e6\u5916\u4e00\u79cd\u662f\u57fa\u4e8efast
\npaxos\u7b97\u6cd5\u5b9e\u73b0\u7684\u3002\u7cfb\u7edf\u9ed8\u8ba4\u7684\u9009\u4e3e\u7b97\u6cd5\u4e3afast paxos\u3002\u5148\u4ecb\u7ecdbasic paxos\u6d41\u7a0b\uff1a<\/p>\n1 .\u9009\u4e3e\u7ebf\u7a0b\u7531\u5f53\u524dServer\u53d1\u8d77\u9009\u4e3e\u7684\u7ebf\u7a0b\u62c5\u4efb\uff0c\u5176\u4e3b\u8981\u529f\u80fd\u662f\u5bf9\u6295\u7968\u7ed3\u679c\u8fdb\u884c\u7edf\u8ba1\uff0c\u5e76\u9009\u51fa\u63a8\u8350\u7684Server\uff1b<\/p>\n
2 .\u9009\u4e3e\u7ebf\u7a0b\u9996\u5148\u5411\u6240\u6709Server\u53d1\u8d77\u4e00\u6b21\u8be2\u95ee(\u5305\u62ec\u81ea\u5df1)\uff1b<\/p>\n
3<\/p>\n
.\u9009\u4e3e\u7ebf\u7a0b\u6536\u5230\u56de\u590d\u540e\uff0c\u9a8c\u8bc1\u662f\u5426\u662f\u81ea\u5df1\u53d1\u8d77\u7684\u8be2\u95ee(\u9a8c\u8bc1zxid\u662f\u5426\u4e00\u81f4)\uff0c\u7136\u540e\u83b7\u53d6\u5bf9\u65b9\u7684id(myid)\uff0c\u5e76\u5b58\u50a8\u5230\u5f53\u524d\u8be2\u95ee\u5bf9\u8c61\u5217\u8868\u4e2d\uff0c\u6700\u540e\u83b7\u53d6\u5bf9\u65b9
\n\u63d0\u8bae\u7684leader\u76f8\u5173\u4fe1\u606f( id,zxid)\uff0c\u5e76\u5c06\u8fd9\u4e9b\u4fe1\u606f\u5b58\u50a8\u5230\u5f53\u6b21\u9009\u4e3e\u7684\u6295\u7968\u8bb0\u5f55\u8868\u4e2d\uff1b<\/p>\n4. \u6536\u5230\u6240\u6709Server\u56de\u590d\u4ee5\u540e\uff0c\u5c31\u8ba1\u7b97\u51fazxid\u6700\u5927\u7684\u90a3\u4e2aServer\uff0c\u5e76\u5c06\u8fd9\u4e2aServer\u76f8\u5173\u4fe1\u606f\u8bbe\u7f6e\u6210\u4e0b\u4e00\u6b21\u8981\u6295\u7968\u7684Server\uff1b<\/p>\n
5.
\n \u7ebf\u7a0b\u5c06\u5f53\u524dzxid\u6700\u5927\u7684Server\u8bbe\u7f6e\u4e3a\u5f53\u524dServer\u8981\u63a8\u8350\u7684Leader\uff0c\u5982\u679c\u6b64\u65f6\u83b7\u80dc\u7684Server\u83b7\u5f97n\/2 +
\n1\u7684Server\u7968\u6570\uff0c
\n\u8bbe\u7f6e\u5f53\u524d\u63a8\u8350\u7684leader\u4e3a\u83b7\u80dc\u7684Server\uff0c\u5c06\u6839\u636e\u83b7\u80dc\u7684Server\u76f8\u5173\u4fe1\u606f\u8bbe\u7f6e\u81ea\u5df1\u7684\u72b6\u6001\uff0c\u5426\u5219\uff0c\u7ee7\u7eed\u8fd9\u4e2a\u8fc7\u7a0b\uff0c\u76f4\u5230leader\u88ab\u9009\u4e3e\u51fa\u6765\u3002<\/p>\n\u901a\u8fc7\u6d41\u7a0b\u5206\u6790\u6211\u4eec\u53ef\u4ee5\u5f97\u51fa\uff1a\u8981\u4f7fLeader\u83b7\u5f97\u591a\u6570Server\u7684\u652f\u6301\uff0c\u5219Server\u603b\u6570\u5fc5\u987b\u662f\u5947\u65702n+1\uff0c\u4e14\u5b58\u6d3b\u7684Server\u7684\u6570\u76ee\u4e0d\u5f97\u5c11\u4e8en+1.<\/p>\n
\u6bcf\u4e2aServer\u542f\u52a8\u540e\u90fd\u4f1a\u91cd\u590d\u4ee5\u4e0a\u6d41\u7a0b\u3002\u5728\u6062\u590d\u6a21\u5f0f\u4e0b\uff0c\u5982\u679c\u662f\u521a\u4ece\u5d29\u6e83\u72b6\u6001\u6062\u590d\u7684\u6216\u8005\u521a\u542f\u52a8\u7684server\u8fd8\u4f1a\u4ece\u78c1\u76d8\u5feb\u7167\u4e2d\u6062\u590d\u6570\u636e\u548c\u4f1a\u8bdd\u4fe1\u606f\uff0czk\u4f1a\u8bb0\u5f55\u4e8b\u52a1\u65e5\u5fd7\u5e76\u5b9a\u671f\u8fdb\u884c\u5feb\u7167\uff0c\u65b9\u4fbf\u5728\u6062\u590d\u65f6\u8fdb\u884c\u72b6\u6001\u6062\u590d\u3002\u9009\u4e3b\u7684\u5177\u4f53\u6d41\u7a0b\u56fe\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/79e61471253201.png\")
<\/a><\/p>\n
\n fast
\npaxos\u6d41\u7a0b\u662f\u5728\u9009\u4e3e\u8fc7\u7a0b\u4e2d\uff0c\u67d0Server\u9996\u5148\u5411\u6240\u6709Server\u63d0\u8bae\u81ea\u5df1\u8981\u6210\u4e3aleader\uff0c\u5f53\u5176\u5b83Server\u6536\u5230\u63d0\u8bae\u4ee5\u540e\uff0c\u89e3\u51b3epoch\u548c
\nzxid\u7684\u51b2\u7a81\uff0c\u5e76\u63a5\u53d7\u5bf9\u65b9\u7684\u63d0\u8bae\uff0c\u7136\u540e\u5411\u5bf9\u65b9\u53d1\u9001\u63a5\u53d7\u63d0\u8bae\u5b8c\u6210\u7684\u6d88\u606f\uff0c\u91cd\u590d\u8fd9\u4e2a\u6d41\u7a0b\uff0c\u6700\u540e\u4e00\u5b9a\u80fd\u9009\u4e3e\u51faLeader\u3002\u5176\u6d41\u7a0b\u56fe\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/fe1e1471253204.png\")
<\/a><\/p>\n<\/a>2.2 \u540c\u6b65\u6d41\u7a0b<\/h2>\n
\u9009\u5b8cleader\u4ee5\u540e\uff0czk\u5c31\u8fdb\u5165\u72b6\u6001\u540c\u6b65\u8fc7\u7a0b\u3002<\/p>\n
1. leader\u7b49\u5f85server\u8fde\u63a5\uff1b<\/p>\n
2 .Follower\u8fde\u63a5leader\uff0c\u5c06\u6700\u5927\u7684zxid\u53d1\u9001\u7ed9leader\uff1b<\/p>\n
3 .Leader\u6839\u636efollower\u7684zxid\u786e\u5b9a\u540c\u6b65\u70b9\uff1b<\/p>\n
4 .\u5b8c\u6210\u540c\u6b65\u540e\u901a\u77e5follower \u5df2\u7ecf\u6210\u4e3auptodate\u72b6\u6001\uff1b<\/p>\n
5 .Follower\u6536\u5230uptodate\u6d88\u606f\u540e\uff0c\u53c8\u53ef\u4ee5\u91cd\u65b0\u63a5\u53d7client\u7684\u8bf7\u6c42\u8fdb\u884c\u670d\u52a1\u4e86\u3002<\/p>\n
\u6d41\u7a0b\u56fe\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/a9641471253204.jpg\")
<\/a><\/p>\n<\/a>2.3 \u5de5\u4f5c\u6d41\u7a0b<\/h2>\n
<\/a>2.3.1 Leader\u5de5\u4f5c\u6d41\u7a0b<\/h3>\n
Leader\u4e3b\u8981\u6709\u4e09\u4e2a\u529f\u80fd\uff1a<\/p>\n
1 .\u6062\u590d\u6570\u636e\uff1b<\/p>\n
2 .\u7ef4\u6301\u4e0eLearner\u7684\u5fc3\u8df3\uff0c\u63a5\u6536Learner\u8bf7\u6c42\u5e76\u5224\u65adLearner\u7684\u8bf7\u6c42\u6d88\u606f\u7c7b\u578b\uff1b<\/p>\n
3 .Learner\u7684\u6d88\u606f\u7c7b\u578b\u4e3b\u8981\u6709PING\u6d88\u606f\u3001REQUEST\u6d88\u606f\u3001ACK\u6d88\u606f\u3001REVALIDATE\u6d88\u606f\uff0c\u6839\u636e\u4e0d\u540c\u7684\u6d88\u606f\u7c7b\u578b\uff0c\u8fdb\u884c\u4e0d\u540c\u7684\u5904\u7406\u3002<\/p>\n
PING
\n\u6d88\u606f\u662f\u6307Learner\u7684\u5fc3\u8df3\u4fe1\u606f\uff1bREQUEST\u6d88\u606f\u662fFollower\u53d1\u9001\u7684\u63d0\u8bae\u4fe1\u606f\uff0c\u5305\u62ec\u5199\u8bf7\u6c42\u53ca\u540c\u6b65\u8bf7\u6c42\uff1bACK\u6d88\u606f\u662f
\nFollower\u7684\u5bf9\u63d0\u8bae\u7684\u56de\u590d\uff0c\u8d85\u8fc7\u534a\u6570\u7684Follower\u901a\u8fc7\uff0c\u5219commit\u8be5\u63d0\u8bae\uff1bREVALIDATE\u6d88\u606f\u662f\u7528\u6765\u5ef6\u957fSESSION\u6709\u6548\u65f6\u95f4\u3002
\nLeader\u7684\u5de5\u4f5c\u6d41\u7a0b\u7b80\u56fe\u5982\u4e0b\u6240\u793a\uff0c\u5728\u5b9e\u9645\u5b9e\u73b0\u4e2d\uff0c\u6d41\u7a0b\u8981\u6bd4\u4e0b\u56fe\u590d\u6742\u5f97\u591a\uff0c\u542f\u52a8\u4e86\u4e09\u4e2a\u7ebf\u7a0b\u6765\u5b9e\u73b0\u529f\u80fd\u3002<\/p>\n![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/7bd51471253205.png\")
<\/a><\/p>\n<\/a>2.3.2 Follower\u5de5\u4f5c\u6d41\u7a0b<\/h3>\n
Follower\u4e3b\u8981\u6709\u56db\u4e2a\u529f\u80fd\uff1a<\/p>\n
1. \u5411Leader\u53d1\u9001\u8bf7\u6c42\uff08PING\u6d88\u606f\u3001REQUEST\u6d88\u606f\u3001ACK\u6d88\u606f\u3001REVALIDATE\u6d88\u606f\uff09\uff1b<\/p>\n
2 .\u63a5\u6536Leader\u6d88\u606f\u5e76\u8fdb\u884c\u5904\u7406\uff1b<\/p>\n
3 .\u63a5\u6536Client\u7684\u8bf7\u6c42\uff0c\u5982\u679c\u4e3a\u5199\u8bf7\u6c42\uff0c\u53d1\u9001\u7ed9Leader\u8fdb\u884c\u6295\u7968\uff1b<\/p>\n
4 .\u8fd4\u56deClient\u7ed3\u679c\u3002<\/p>\n
Follower\u7684\u6d88\u606f\u5faa\u73af\u5904\u7406\u5982\u4e0b\u51e0\u79cd\u6765\u81eaLeader\u7684\u6d88\u606f\uff1a<\/p>\n
1 .PING<\/span>\u6d88\u606f\uff1a \u5fc3\u8df3\u6d88\u606f\uff1b<\/p>\n
2 .PROPOSAL<\/span>\u6d88\u606f\uff1aLeader\u53d1\u8d77\u7684\u63d0\u6848\uff0c\u8981\u6c42Follower\u6295\u7968\uff1b<\/p>\n
3 .COMMIT<\/span>\u6d88\u606f\uff1a\u670d\u52a1\u5668\u7aef\u6700\u65b0\u4e00\u6b21\u63d0\u6848\u7684\u4fe1\u606f\uff1b<\/p>\n
4 .UPTODATE<\/span>\u6d88\u606f\uff1a\u8868\u660e\u540c\u6b65\u5b8c\u6210\uff1b<\/p>\n
5 .REVALIDATE<\/span>\u6d88\u606f\uff1a\u6839\u636eLeader\u7684REVALIDATE\u7ed3\u679c\uff0c\u5173\u95ed\u5f85revalidate\u7684session\u8fd8\u662f\u5141\u8bb8\u5176\u63a5\u53d7\u6d88\u606f\uff1b<\/p>\n
6 .SYNC<\/span>\u6d88\u606f\uff1a\u8fd4\u56deSYNC\u7ed3\u679c\u5230\u5ba2\u6237\u7aef\uff0c\u8fd9\u4e2a\u6d88\u606f\u6700\u521d\u7531\u5ba2\u6237\u7aef\u53d1\u8d77\uff0c\u7528\u6765\u5f3a\u5236\u5f97\u5230\u6700\u65b0\u7684\u66f4\u65b0\u3002<\/p>\n
Follower\u7684\u5de5\u4f5c\u6d41\u7a0b\u7b80\u56fe\u5982\u4e0b\u6240\u793a\uff0c\u5728\u5b9e\u9645\u5b9e\u73b0\u4e2d\uff0cFollower\u662f\u901a\u8fc75\u4e2a\u7ebf\u7a0b\u6765\u5b9e\u73b0\u529f\u80fd\u7684\u3002<\/p>\n
![\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"](\"\/notes\/content\/uploadfile\/201608\/d25f1471253205.png\")
<\/a><\/p>\n\u5bf9\u4e8eobserver\u7684\u6d41\u7a0b\u4e0d\u518d\u53d9\u8ff0\uff0cobserver\u6d41\u7a0b\u548cFollower\u7684\u552f\u4e00\u4e0d\u540c\u7684\u5730\u65b9\u5c31\u662fobserver\u4e0d\u4f1a\u53c2\u52a0leader\u53d1\u8d77\u7684\u6295\u7968\u3002<\/p>\n
<\/p>\n
<\/a>\u9644\u5f55\uff1a<\/h1>\n
<\/a>ZooKeeper\u5178\u578b\u4f7f\u7528\u573a\u666f\u4e00\u89c8<\/a><\/h2>\n
ZooKeeper
\n\u662f\u4e00\u4e2a\u9ad8\u53ef\u7528\u7684\u5206\u5e03\u5f0f\u6570\u636e\u7ba1\u7406\u4e0e\u7cfb\u7edf\u534f\u8c03\u6846\u67b6\u3002\u57fa\u4e8e\u5bf9Paxos\u7b97\u6cd5\u7684\u5b9e\u73b0\uff0c\u4f7f\u8be5\u6846\u67b6\u4fdd\u8bc1\u4e86\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\u6570\u636e\u7684\u5f3a\u4e00\u81f4\u6027\uff0c\u4e5f\u6b63\u662f\u57fa
\n\u4e8e\u8fd9\u6837\u7684\u7279\u6027\uff0c\u4f7f\u5f97zookeeper\u80fd\u591f\u5e94\u7528\u4e8e\u5f88\u591a\u573a\u666f\u3002\u7f51\u4e0a\u5bf9zk\u7684\u4f7f\u7528\u573a\u666f\u4e5f\u6709\u4e0d\u5c11\u4ecb\u7ecd\uff0c\u672c\u6587\u5c06\u7ed3\u5408\u4f5c\u8005\u8eab\u8fb9\u7684\u9879\u76ee\u4f8b\u5b50\uff0c\u7cfb\u7edf\u7684\u5bf9zk\u7684\u4f7f\u7528\u573a\u666f\u8fdb
\n \u884c\u5f52\u7c7b\u4ecb\u7ecd\u3002
\n\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0czk\u5e76\u4e0d\u662f\u751f\u6765\u5c31\u4e3a\u8fd9\u4e9b\u573a\u666f\u8bbe\u8ba1\uff0c\u90fd\u662f\u540e\u6765\u4f17\u591a\u5f00\u53d1\u8005\u6839\u636e\u6846\u67b6\u7684\u7279\u6027\uff0c\u6478\u7d22\u51fa\u6765\u7684\u5178\u578b\u4f7f\u7528\u65b9\u6cd5\u3002\u56e0\u6b64\uff0c\u4e5f\u975e\u5e38\u6b22\u8fce\u4f60\u5206\u4eab\u4f60\u5728ZK\u4f7f\u7528\u4e0a\u7684\u5947
\n \u6280\u6deb\u5de7\u3002<\/p>\n<\/p>\n
\n\n
\n \n \u573a\u666f\u7c7b\u522b<\/span><\/p>\n<\/td>\n
\n \u5178\u578b\u573a\u666f\u63cf\u8ff0\uff08ZK\u7279\u6027\uff0c\u4f7f\u7528\u65b9\u6cd5\uff09<\/span><\/p>\n<\/td>\n
\n \u5e94\u7528\u4e2d\u7684\u5177\u4f53\u4f7f\u7528<\/span><\/p>\n<\/td>\n<\/tr>\n
\n \n \u6570\u636e\u53d1\u5e03\u4e0e\u8ba2\u9605<\/span><\/p>\n<\/td>\n
\n \u53d1\u5e03\u4e0e\u8ba2\u9605\u5373\u6240\u8c13\u7684\u914d\u7f6e\u7ba1\u7406\uff0c\u987e\u540d\u601d\u4e49\u5c31\u662f\u5c06\u6570\u636e\u53d1\u5e03\u5230zk\u8282\u70b9\u4e0a\uff0c\u4f9b\u8ba2\u9605\u8005\u52a8\u6001\u83b7\u53d6\u6570\u636e\uff0c\u5b9e\u73b0\u914d\u7f6e\u4fe1\u606f\u7684\u96c6\u4e2d\u5f0f\u7ba1\u7406\u548c\u52a8\u6001\u66f4\u65b0\u3002\u4f8b\u5982\u5168\u5c40\u7684\u914d\u7f6e\u4fe1\u606f\uff0c\u5730\u5740\u5217\u8868\u7b49\u5c31\u975e\u5e38\u9002\u5408\u4f7f\u7528\u3002<\/p>\n<\/td>\n
\n 1. \u7d22\u5f15\u4fe1\u606f\u548c\u96c6\u7fa4\u4e2d\u673a\u5668\u8282\u70b9\u72b6\u6001\u5b58\u653e\u5728zk\u7684\u4e00\u4e9b\u6307\u5b9a\u8282\u70b9\uff0c\u4f9b\u5404\u4e2a\u5ba2\u6237\u7aef\u8ba2\u9605\u4f7f\u7528\u30022. \u7cfb\u7edf\u65e5\u5fd7\uff08\u7ecf\u8fc7\u5904\u7406\u540e\u7684\uff09\u5b58\u50a8\uff0c\u8fd9\u4e9b\u65e5\u5fd7\u901a\u5e382-3\u5929\u540e\u88ab\u6e05\u9664\u3002<\/p>\n
<\/p>\n
3. \u5e94\u7528\u4e2d\u7528\u5230\u7684\u4e00\u4e9b\u914d\u7f6e\u4fe1\u606f\u96c6\u4e2d\u7ba1\u7406\uff0c\u5728\u5e94\u7528\u542f\u52a8\u7684\u65f6\u5019\u4e3b\u52a8\u6765\u83b7\u53d6\u4e00\u6b21\uff0c\u5e76\u4e14\u5728\u8282\u70b9\u4e0a\u6ce8\u518c\u4e00\u4e2aWatcher\uff0c\u4ee5\u540e\u6bcf\u6b21\u914d\u7f6e\u6709\u66f4\u65b0\uff0c\u5b9e\u65f6\u901a\u77e5\u5230\u5e94\u7528\uff0c\u83b7\u53d6\u6700\u65b0\u914d\u7f6e\u4fe1\u606f\u3002<\/p>\n
4. \u4e1a\u52a1\u903b\u8f91\u4e2d\u9700\u8981\u7528\u5230\u7684\u4e00\u4e9b\u5168\u5c40\u53d8\u91cf\uff0c\u6bd4\u5982\u4e00\u4e9b\u6d88\u606f\u4e2d\u95f4\u4ef6\u7684\u6d88\u606f\u961f\u5217\u901a\u5e38\u6709\u4e2aoffset\uff0c\u8fd9\u4e2aoffset\u5b58\u653e\u5728zk\u4e0a\uff0c\u8fd9\u6837\u96c6\u7fa4\u4e2d\u6bcf\u4e2a\u53d1\u9001\u8005\u90fd\u80fd\u77e5\u9053\u5f53\u524d\u7684\u53d1\u9001\u8fdb\u5ea6\u3002<\/p>\n
5. \u7cfb\u7edf\u4e2d\u6709\u4e9b\u4fe1\u606f\u9700\u8981\u52a8\u6001\u83b7\u53d6\uff0c\u5e76\u4e14\u8fd8\u4f1a\u5b58\u5728\u4eba\u5de5\u624b\u52a8\u53bb\u4fee\u6539\u8fd9\u4e2a\u4fe1\u606f\u3002\u4ee5\u524d\u901a\u5e38\u662f\u66b4\u9732\u51fa\u63a5\u53e3\uff0c\u4f8b\u5982JMX\u63a5\u53e3\uff0c\u6709\u4e86zk\u540e\uff0c\u53ea\u8981\u5c06\u8fd9\u4e9b\u4fe1\u606f\u5b58\u653e\u5230zk\u8282\u70b9\u4e0a\u5373\u53ef\u3002<\/p>\n<\/td>\n<\/tr>\n
\n \n Name Service<\/span><\/p>\n<\/td>\n
\n \u8fd9\u4e2a\u4e3b\u8981\u662f\u4f5c\u4e3a\u5206\u5e03\u5f0f\u547d\u540d\u670d\u52a1\uff0c\u901a\u8fc7\u8c03\u7528zk\u7684create node api\uff0c\u80fd\u591f\u5f88\u5bb9\u6613\u521b\u5efa\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u7684path\uff0c\u8fd9\u4e2apath\u5c31\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u540d\u79f0\u3002<\/p>\n<\/td>\n
\n <\/p>\n<\/td>\n<\/tr>\n
\n \n \u5206\u5e03\u901a\u77e5\/\u534f\u8c03<\/span><\/p>\n<\/td>\n
\n ZooKeeper<\/p>\n
\u4e2d\u7279\u6709watcher\u6ce8\u518c\u4e0e\u5f02\u6b65\u901a\u77e5\u673a\u5236\uff0c\u80fd\u591f\u5f88\u597d\u7684\u5b9e\u73b0\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u4e0d\u540c\u7cfb\u7edf\u4e4b\u95f4\u7684\u901a\u77e5\u4e0e\u534f\u8c03\uff0c\u5b9e\u73b0\u5bf9\u6570\u636e\u53d8\u66f4\u7684\u5b9e\u65f6\u5904\u7406\u3002\u4f7f\u7528\u65b9\u6cd5\u901a\u5e38\u662f\u4e0d\u540c\u7cfb\u7edf\u90fd\u5bf9<\/p>\n
ZK\u4e0a\u540c\u4e00\u4e2aznode\u8fdb\u884c\u6ce8\u518c\uff0c\u76d1\u542cznode\u7684\u53d8\u5316\uff08\u5305\u62ecznode\u672c\u8eab\u5185\u5bb9\u53ca\u5b50\u8282\u70b9\u7684\uff09\uff0c\u5176\u4e2d\u4e00\u4e2a\u7cfb\u7edfupdate\u4e86znode\uff0c\u90a3\u4e48\u53e6\u4e00\u4e2a\u7cfb\u7edf\u80fd
\n \u591f\u6536\u5230\u901a\u77e5\uff0c\u5e76\u4f5c\u51fa\u76f8\u5e94\u5904\u7406\u3002<\/p>\n<\/td>\n\n 1.
\n \u53e6\u4e00\u79cd\u5fc3\u8df3\u68c0\u6d4b\u673a\u5236\uff1a\u68c0\u6d4b\u7cfb\u7edf\u548c\u88ab\u68c0\u6d4b\u7cfb\u7edf\u4e4b\u95f4\u5e76\u4e0d\u76f4\u63a5\u5173\u8054\u8d77\u6765\uff0c\u800c\u662f\u901a\u8fc7zk\u4e0a\u67d0\u4e2a\u8282\u70b9\u5173\u8054\uff0c\u5927\u5927\u51cf\u5c11\u7cfb\u7edf\u8026\u5408\u30022.
\n\u53e6\u4e00\u79cd\u7cfb\u7edf\u8c03\u5ea6\u6a21\u5f0f\uff1a\u67d0\u7cfb\u7edf\u6709\u63a7\u5236\u53f0\u548c\u63a8\u9001\u7cfb\u7edf\u4e24\u90e8\u5206\u7ec4\u6210\uff0c\u63a7\u5236\u53f0\u7684\u804c\u8d23\u662f\u63a7\u5236\u63a8\u9001\u7cfb\u7edf\u8fdb\u884c\u76f8\u5e94\u7684\u63a8\u9001\u5de5\u4f5c\u3002\u7ba1\u7406\u4eba\u5458\u5728\u63a7\u5236\u53f0\u4f5c\u7684\u4e00\u4e9b\u64cd\u4f5c\uff0c\u5b9e\u9645\u4e0a\u662f\u4fee\u6539
\n \u4e86ZK\u4e0a\u67d0\u4e9b\u8282\u70b9\u7684\u72b6\u6001\uff0c\u800czk\u5c31\u628a\u8fd9\u4e9b\u53d8\u5316\u901a\u77e5\u7ed9\u4ed6\u4eec\u6ce8\u518cWatcher\u7684\u5ba2\u6237\u7aef\uff0c\u5373\u63a8\u9001\u7cfb\u7edf\uff0c\u4e8e\u662f\uff0c\u4f5c\u51fa\u76f8\u5e94\u7684\u63a8\u9001\u4efb\u52a1\u3002<\/p>\n<\/p>\n
3. \u53e6\u4e00\u79cd\u5de5\u4f5c\u6c47\u62a5\u6a21\u5f0f\uff1a\u4e00\u4e9b\u7c7b\u4f3c\u4e8e\u4efb\u52a1\u5206\u53d1\u7cfb\u7edf\uff0c\u5b50\u4efb\u52a1\u542f\u52a8\u540e\uff0c\u5230zk\u6765\u6ce8\u518c\u4e00\u4e2a\u4e34\u65f6\u8282\u70b9\uff0c\u5e76\u4e14\u5b9a\u65f6\u5c06\u81ea\u5df1\u7684\u8fdb\u5ea6\u8fdb\u884c\u6c47\u62a5\uff08\u5c06\u8fdb\u5ea6\u5199\u56de\u8fd9\u4e2a\u4e34\u65f6\u8282\u70b9\uff09\uff0c\u8fd9\u6837\u4efb\u52a1\u7ba1\u7406\u8005\u5c31\u80fd\u591f\u5b9e\u65f6\u77e5\u9053\u4efb\u52a1\u8fdb\u5ea6\u3002<\/p>\n
\u603b\u4e4b\uff0c\u4f7f\u7528zookeeper\u6765\u8fdb\u884c\u5206\u5e03\u5f0f\u901a\u77e5\u548c\u534f\u8c03\u80fd\u591f\u5927\u5927\u964d\u4f4e\u7cfb\u7edf\u4e4b\u95f4\u7684\u8026\u5408\u3002<\/p>\n<\/td>\n<\/tr>\n
\n \n \u5206\u5e03\u5f0f\u9501<\/span><\/p>\n<\/td>\n
\n \u5206\u5e03\u5f0f\u9501\uff0c\u8fd9\u4e2a\u4e3b\u8981\u5f97\u76ca\u4e8eZooKeeper\u4e3a\u6211\u4eec\u4fdd\u8bc1\u4e86\u6570\u636e\u7684\u5f3a\u4e00\u81f4\u6027\uff0c\u5373\u7528\u6237\u53ea\u8981\u5b8c\u5168\u76f8\u4fe1\u6bcf\u65f6\u6bcf\u523b\uff0czk\u96c6\u7fa4\u4e2d\u4efb\u610f\u8282\u70b9\uff08\u4e00\u4e2azk server\uff09\u4e0a\u7684\u76f8\u540cznode\u7684\u6570\u636e\u662f\u4e00\u5b9a\u662f\u76f8\u540c\u7684\u3002\u9501\u670d\u52a1\u53ef\u4ee5\u5206\u4e3a\u4e24\u7c7b\uff0c\u4e00\u4e2a\u662f\u4fdd\u6301\u72ec\u5360\uff0c\u53e6\u4e00\u4e2a\u662f\u63a7\u5236\u65f6\u5e8f\u3002<\/span><\/p>\n
<\/p>\n
\u6240<\/p>\n
\u8c13\u4fdd\u6301\u72ec\u5360\uff0c\u5c31\u662f\u6240\u6709\u8bd5\u56fe\u6765\u83b7\u53d6\u8fd9\u4e2a\u9501\u7684\u5ba2\u6237\u7aef\uff0c\u6700\u7ec8\u53ea\u6709\u4e00\u4e2a\u53ef\u4ee5\u6210\u529f\u83b7\u5f97\u8fd9\u628a\u9501\u3002\u901a\u5e38\u7684\u505a\u6cd5\u662f\u628azk\u4e0a\u7684\u4e00\u4e2aznode\u770b\u4f5c\u662f\u4e00\u628a\u9501\uff0c\u901a\u8fc7create
\n znode\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002\u6240\u6709\u5ba2\u6237\u7aef\u90fd\u53bb\u521b\u5efa \/distribute_lock \u8282\u70b9\uff0c\u6700\u7ec8\u6210\u529f\u521b\u5efa\u7684\u90a3\u4e2a\u5ba2\u6237\u7aef\u4e5f\u5373\u62e5\u6709\u4e86\u8fd9\u628a\u9501\u3002<\/p>\n\u63a7
\n \u5236\u65f6\u5e8f\uff0c\u5c31\u662f\u6240\u6709\u89c6\u56fe\u6765\u83b7\u53d6\u8fd9\u4e2a\u9501\u7684\u5ba2\u6237\u7aef\uff0c\u6700\u7ec8\u90fd\u662f\u4f1a\u88ab\u5b89\u6392\u6267\u884c\uff0c\u53ea\u662f\u6709\u4e2a\u5168\u5c40\u65f6\u5e8f\u4e86\u3002\u505a\u6cd5\u548c\u4e0a\u9762\u57fa\u672c\u7c7b\u4f3c\uff0c\u53ea\u662f\u8fd9\u91cc
\n\/distribute_lock
\n\u5df2\u7ecf\u9884\u5148\u5b58\u5728\uff0c\u5ba2\u6237\u7aef\u5728\u5b83\u4e0b\u9762\u521b\u5efa\u4e34\u65f6\u6709\u5e8f\u8282\u70b9\uff08\u8fd9\u4e2a\u53ef\u4ee5\u901a\u8fc7\u8282\u70b9\u7684\u5c5e\u6027\u63a7\u5236\uff1aCreateMode.EPHEMERAL_SEQUENTIAL\u6765\u6307
\n\u5b9a\uff09\u3002Zk\u7684\u7236\u8282\u70b9\uff08\/distribute_lock\uff09\u7ef4\u6301\u4e00\u4efdsequence,\u4fdd\u8bc1\u5b50\u8282\u70b9\u521b\u5efa\u7684\u65f6\u5e8f\u6027\uff0c\u4ece\u800c\u4e5f\u5f62\u6210\u4e86\u6bcf\u4e2a\u5ba2\u6237\u7aef\u7684\u5168\u5c40\u65f6\u5e8f\u3002<\/p>\n<\/td>\n\n <\/p>\n<\/td>\n<\/tr>\n
\n \n \u96c6\u7fa4\u7ba1\u7406<\/span><\/p>\n<\/td>\n
\n 1. \u96c6\u7fa4\u673a\u5668<\/span>\u76d1<\/p>\n
\u63a7\uff1a\u8fd9\u901a\u5e38\u7528\u4e8e\u90a3\u79cd\u5bf9\u96c6\u7fa4\u4e2d\u673a\u5668\u72b6\u6001\uff0c\u673a\u5668\u5728\u7ebf\u7387\u6709\u8f83\u9ad8\u8981\u6c42\u7684\u573a\u666f\uff0c\u80fd\u591f\u5feb\u901f\u5bf9\u96c6\u7fa4\u4e2d\u673a\u5668\u53d8\u5316\u4f5c\u51fa\u54cd\u5e94\u3002\u8fd9\u6837\u7684\u573a\u666f\u4e2d\uff0c\u5f80\u5f80\u6709\u4e00\u4e2a\u76d1\u63a7\u7cfb\u7edf\uff0c\u5b9e\u65f6\u68c0\u6d4b\u96c6\u7fa4
\n \u673a\u5668\u662f\u5426\u5b58\u6d3b\u3002\u8fc7\u53bb\u7684\u505a\u6cd5\u901a\u5e38\u662f\uff1a\u76d1\u63a7\u7cfb\u7edf\u901a\u8fc7\u67d0\u79cd\u624b\u6bb5\uff08\u6bd4\u5982ping\uff09\u5b9a\u65f6\u68c0\u6d4b\u6bcf\u4e2a\u673a\u5668\uff0c\u6216\u8005\u6bcf\u4e2a\u673a\u5668\u81ea\u5df1\u5b9a\u65f6\u5411\u76d1\u63a7\u7cfb\u7edf\u6c47\u62a5\u201c\u6211\u8fd8\u6d3b\u7740\u201d\u3002
\n\u8fd9\u79cd\u505a\u6cd5\u53ef\u884c\uff0c\u4f46\u662f\u5b58\u5728\u4e24\u4e2a\u6bd4\u8f83\u660e\u663e\u7684\u95ee\u9898\uff1a1. \u96c6\u7fa4\u4e2d\u673a\u5668\u6709\u53d8\u52a8\u7684\u65f6\u5019\uff0c\u7275\u8fde\u4fee\u6539\u7684\u4e1c\u897f\u6bd4\u8f83\u591a\u30022. \u6709\u4e00\u5b9a\u7684\u5ef6\u65f6\u3002<\/p>\n<\/p>\n
\u5229
\n \u7528ZooKeeper\u6709\u4e24\u4e2a\u7279\u6027\uff0c\u5c31\u53ef\u4ee5\u5b9e\u65f6\u53e6\u4e00\u79cd\u96c6\u7fa4\u673a\u5668\u5b58\u6d3b\u6027\u76d1\u63a7\u7cfb\u7edf\uff1aa. \u5ba2\u6237\u7aef\u5728\u8282\u70b9 x \u4e0a\u6ce8\u518c\u4e00\u4e2aWatcher\uff0c\u90a3\u4e48\u5982\u679c
\nx \u7684\u5b50\u8282\u70b9\u53d8\u5316\u4e86\uff0c\u4f1a\u901a\u77e5\u8be5\u5ba2\u6237\u7aef\u3002b. \u521b\u5efaEPHEMERAL\u7c7b\u578b\u7684\u8282\u70b9\uff0c\u4e00\u65e6\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7684\u4f1a\u8bdd\u7ed3\u675f\u6216\u8fc7\u671f\uff0c\u90a3\u4e48\u8be5\u8282\u70b9\u5c31\u4f1a\u6d88\u5931\u3002<\/p>\n\u4f8b
\n \u5982\uff0c\u76d1\u63a7\u7cfb\u7edf\u5728 \/clusterServers \u8282\u70b9\u4e0a\u6ce8\u518c\u4e00\u4e2aWatcher\uff0c\u4ee5\u540e\u6bcf\u52a8\u6001\u52a0\u673a\u5668\uff0c\u90a3\u4e48\u5c31\u5f80 \/clusterServers
\n\u4e0b\u521b\u5efa\u4e00\u4e2a EPHEMERAL\u7c7b\u578b\u7684\u8282\u70b9\uff1a\/clusterServers\/{hostname}.
\n\u8fd9\u6837\uff0c\u76d1\u63a7\u7cfb\u7edf\u5c31\u80fd\u591f\u5b9e\u65f6\u77e5\u9053\u673a\u5668\u7684\u589e\u51cf\u60c5\u51b5\uff0c\u81f3\u4e8e\u540e\u7eed\u5904\u7406\u5c31\u662f\u76d1\u63a7\u7cfb\u7edf\u7684\u4e1a\u52a1\u4e86\u3002
\n2. Master\u9009\u4e3e\u5219\u662fzookeeper\u4e2d\u6700\u4e3a\u7ecf\u5178\u7684\u4f7f\u7528\u573a\u666f\u4e86\u3002<\/span><\/p>\n\u5728<\/p>\n
\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\uff0c\u76f8\u540c\u7684\u4e1a\u52a1\u5e94\u7528\u5206\u5e03\u5728\u4e0d\u540c\u7684\u673a\u5668\u4e0a\uff0c\u6709\u4e9b\u4e1a\u52a1\u903b\u8f91\uff08\u4f8b\u5982\u4e00\u4e9b\u8017\u65f6\u7684\u8ba1\u7b97\uff0c\u7f51\u7edcI\/O\u5904\u7406\uff09\uff0c\u5f80\u5f80\u53ea\u9700\u8981\u8ba9\u6574\u4e2a\u96c6\u7fa4\u4e2d\u7684\u67d0\u4e00\u53f0\u673a\u5668\u8fdb\u884c\u6267\u884c\uff0c
\n \u5176\u4f59\u673a\u5668\u53ef\u4ee5\u5171\u4eab\u8fd9\u4e2a\u7ed3\u679c\uff0c\u8fd9\u6837\u53ef\u4ee5\u5927\u5927\u51cf\u5c11\u91cd\u590d\u52b3\u52a8\uff0c\u63d0\u9ad8\u6027\u80fd\uff0c\u4e8e\u662f\u8fd9\u4e2amaster\u9009\u4e3e\u4fbf\u662f\u8fd9\u79cd\u573a\u666f\u4e0b\u7684\u78b0\u5230\u7684\u4e3b\u8981\u95ee\u9898\u3002<\/p>\n\u5229\u7528ZooKeeper\u7684\u5f3a\u4e00\u81f4\u6027\uff0c\u80fd\u591f\u4fdd\u8bc1\u5728\u5206\u5e03\u5f0f\u9ad8\u5e76\u53d1\u60c5\u51b5\u4e0b\u8282\u70b9\u521b\u5efa\u7684\u5168\u5c40\u552f\u4e00\u6027\uff0c\u5373\uff1a\u540c\u65f6\u6709\u591a\u4e2a\u5ba2\u6237\u7aef\u8bf7\u6c42\u521b\u5efa \/currentMaster \u8282\u70b9\uff0c\u6700\u7ec8\u4e00\u5b9a\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u8bf7\u6c42\u80fd\u591f\u521b\u5efa\u6210\u529f\u3002<\/p>\n
\u5229\u7528\u8fd9\u4e2a\u7279\u6027\uff0c\u5c31\u80fd\u5f88\u8f7b\u6613\u7684\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\u8fdb\u884c\u96c6\u7fa4\u9009\u53d6\u4e86\u3002<\/p>\n
\u53e6\u5916\uff0c\u8fd9\u79cd\u573a\u666f\u6f14\u5316\u4e00\u4e0b\uff0c\u5c31\u662f\u52a8\u6001Master\u9009\u4e3e\u3002\u8fd9\u5c31\u8981\u7528\u5230 EPHEMERAL_SEQUENTIAL\u7c7b\u578b\u8282\u70b9\u7684\u7279\u6027\u4e86\u3002<\/p>\n
\u4e0a<\/p>\n
\u6587\u4e2d\u63d0\u5230\uff0c\u6240\u6709\u5ba2\u6237\u7aef\u521b\u5efa\u8bf7\u6c42\uff0c\u6700\u7ec8\u53ea\u6709\u4e00\u4e2a\u80fd\u591f\u521b\u5efa\u6210\u529f\u3002\u5728\u8fd9\u91cc\u7a0d\u5fae\u53d8\u5316\u4e0b\uff0c\u5c31\u662f\u5141\u8bb8\u6240\u6709\u8bf7\u6c42\u90fd\u80fd\u591f\u521b\u5efa\u6210\u529f\uff0c\u4f46\u662f\u5f97\u6709\u4e2a\u521b\u5efa\u987a\u5e8f\uff0c\u4e8e\u662f\u6240\u6709\u7684\u8bf7\u6c42\u6700\u7ec8
\n \u5728ZK\u4e0a\u521b\u5efa\u7ed3\u679c\u7684\u4e00\u79cd\u53ef\u80fd\u60c5\u51b5\u662f\u8fd9\u6837\uff1a \/currentMaster\/{sessionId}-1
\n, \/currentMaster\/{sessionId}-2 , \/currentMaster\/{sessionId}-3 \u2026..
\n\u6bcf\u6b21\u9009\u53d6\u5e8f\u5217\u53f7\u6700\u5c0f\u7684\u90a3\u4e2a\u673a\u5668\u4f5c\u4e3aMaster\uff0c\u5982\u679c\u8fd9\u4e2a\u673a\u5668\u6302\u4e86\uff0c\u7531\u4e8e\u4ed6\u521b\u5efa\u7684\u8282\u70b9\u4f1a\u9a6c\u4e0a\u5c0f\u65f6\uff0c\u90a3\u4e48\u4e4b\u540e\u6700\u5c0f\u7684\u90a3\u4e2a\u673a\u5668\u5c31\u662fMaster\u4e86\u3002<\/p>\n<\/td>\n\n 1.<\/p>\n
\u5728\u641c\u7d22\u7cfb\u7edf\u4e2d\uff0c\u5982\u679c\u96c6\u7fa4\u4e2d\u6bcf\u4e2a\u673a\u5668\u90fd\u751f\u6210\u4e00\u4efd\u5168\u91cf\u7d22\u5f15\uff0c\u4e0d\u4ec5\u8017\u65f6\uff0c\u800c\u4e14\u4e0d\u80fd\u4fdd\u8bc1\u5f7c\u6b64\u4e4b\u95f4\u7d22\u5f15\u6570\u636e\u4e00\u81f4\u3002\u56e0\u6b64\u8ba9\u96c6\u7fa4\u4e2d\u7684Master\u6765\u8fdb\u884c\u5168\u91cf\u7d22\u5f15\u7684\u751f\u6210\uff0c
\n \u7136\u540e\u540c\u6b65\u5230\u96c6\u7fa4\u4e2d\u5176\u5b83\u673a\u5668\u30022.
\n\u53e6\u5916\uff0cMaster\u9009\u4e3e\u7684\u5bb9\u707e\u63aa\u65bd\u662f\uff0c\u53ef\u4ee5\u968f\u65f6\u8fdb\u884c\u624b\u52a8\u6307\u5b9amaster\uff0c\u5c31\u662f\u8bf4\u5e94\u7528\u5728zk\u5728\u65e0\u6cd5\u83b7\u53d6master\u4fe1\u606f\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u6bd4\u5982http\u65b9\u5f0f\uff0c\u5411
\n \u4e00\u4e2a\u5730\u65b9\u83b7\u53d6master\u3002<\/p>\n<\/td>\n<\/tr>\n\n \n \u5206\u5e03\u5f0f\u961f\u5217<\/span><\/p>\n<\/td>\n
\n \u961f\u5217\u65b9\u9762\uff0c\u6211\u76ee\u524d\u611f\u89c9\u6709\u4e24\u79cd\uff0c\u4e00\u79cd\u662f\u5e38\u89c4\u7684\u5148\u8fdb\u5148\u51fa\u961f\u5217\uff0c\u53e6\u4e00\u79cd\u662f\u8981\u7b49\u5230\u961f\u5217\u6210\u5458\u805a\u9f50\u4e4b\u540e\u7684\u624d\u7edf\u4e00\u6309\u5e8f\u6267\u884c<\/span>\u3002\u5bf9\u4e8e\u7b2c\u4e8c\u79cd\u5148\u8fdb\u5148\u51fa\u961f\u5217\uff0c\u548c\u5206\u5e03\u5f0f\u9501\u670d\u52a1\u4e2d\u7684\u63a7\u5236\u65f6\u5e8f\u573a\u666f\u57fa\u672c\u539f\u7406\u4e00\u81f4\uff0c\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n
<\/p>\n
\u7b2c
\n \u4e8c\u79cd\u961f\u5217\u5176\u5b9e\u662f\u5728FIFO\u961f\u5217\u7684\u57fa\u7840\u4e0a\u4f5c\u4e86\u4e00\u4e2a\u589e\u5f3a\u3002\u901a\u5e38\u53ef\u4ee5\u5728 \/queue \u8fd9\u4e2aznode\u4e0b\u9884\u5148\u5efa\u7acb\u4e00\u4e2a\/queue\/num
\n\u8282\u70b9\uff0c\u5e76\u4e14\u8d4b\u503c\u4e3an\uff08\u6216\u8005\u76f4\u63a5\u7ed9\/queue\u8d4b\u503cn\uff09\uff0c\u8868\u793a\u961f\u5217\u5927\u5c0f\uff0c\u4e4b\u540e\u6bcf\u6b21\u6709\u961f\u5217\u6210\u5458\u52a0\u5165\u540e\uff0c\u5c31\u5224\u65ad\u4e0b\u662f\u5426\u5df2\u7ecf\u5230\u8fbe\u961f\u5217\u5927\u5c0f\uff0c\u51b3\u5b9a\u662f\u5426\u53ef\u4ee5\u5f00\u59cb\u6267\u884c
\n\u4e86\u3002\u8fd9\u79cd\u7528\u6cd5\u7684\u5178\u578b\u573a\u666f\u662f\uff0c\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\uff0c\u4e00\u4e2a\u5927\u4efb\u52a1Task
\nA\uff0c\u9700\u8981\u5728\u5f88\u591a\u5b50\u4efb\u52a1\u5b8c\u6210\uff08\u6216\u6761\u4ef6\u5c31\u7eea\uff09\u60c5\u51b5\u4e0b\u624d\u80fd\u8fdb\u884c\u3002\u8fd9\u4e2a\u65f6\u5019\uff0c\u51e1\u662f\u5176\u4e2d\u4e00\u4e2a\u5b50\u4efb\u52a1\u5b8c\u6210\uff08\u5c31\u7eea\uff09\uff0c\u90a3\u4e48\u5c31\u53bb \/taskList
\n\u4e0b\u5efa\u7acb\u81ea\u5df1\u7684\u4e34\u65f6\u65f6\u5e8f\u8282\u70b9\uff08CreateMode.EPHEMERAL_SEQUENTIAL\uff09\uff0c\u5f53 \/taskList
\n\u53d1\u73b0\u81ea\u5df1\u4e0b\u9762\u7684\u5b50\u8282\u70b9\u6ee1\u8db3\u6307\u5b9a\u4e2a\u6570\uff0c\u5c31\u53ef\u4ee5\u8fdb\u884c\u4e0b\u4e00\u6b65\u6309\u5e8f\u8fdb\u884c\u5904\u7406\u4e86\u3002<\/p>\n<\/td>\n\n <\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\u53c2\u8003\uff1a <\/b><\/p>\nhttp:\/\/zookeeper.apache.org\/<\/a>
\nhttp:\/\/blog.csdn.net\/cutesource\/article\/details\/5822459<\/a>
\nhttp:\/\/blog.csdn.net\/pwlazy\/article\/details\/8080626<\/a>
\nhttp:\/\/nileader.blog.51cto.com\/1381108\/795265<\/a>
\nhttp:\/\/nileader.blog.51cto.com\/1381108\/926753<\/a>
\nhttp:\/\/nileader.blog.51cto.com\/1381108\/795230<\/a>
\nhttp:\/\/netcome.iteye.com\/blog\/1474255<\/a>
\n <\/p>\n","protected":false},"excerpt":{"rendered":"\u573a\u666f\u4e00<\/h2>\n
\u6709\u8fd9\u6837\u4e00\u4e2a\u573a\u666f\uff1a<\/span>\u7cfb
\n\u7edf\u4e2d\u6709\u5927\u7ea6100w\u7684\u7528\u6237\uff0c\u6bcf\u4e2a\u7528\u6237\u5e73
\n\u5747\u67093\u4e2a\u90ae\u7bb1\u8d26\u53f7\uff0c\u6bcf\u96945\u5206\u949f\uff0c\u6bcf\u4e2a\u90ae\u7bb1\u8d26\u9700\u8981\u6536\u53d6100\u5c01\u90ae\u4ef6\uff0c\u6700\u591a3\u4ebf\u4efd\u90ae\u4ef6\u9700\u8981\u4e0b\u8f7d\u5230\u670d\u52a1\u5668\u4e2d(\u4e0d\u542b\u9644\u4ef6\u548c\u6b63\u6587)\u3002\u752820\u53f0\u673a\u5668\u5212\u5206\u8ba1\u7b97\u7684\u538b\u529b\uff0c\u4ece
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- \n
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- \u7528\u6237\u6570\u91cf\u589e\u52a0\u6216\u8005\u51cf\u5c11\uff0c\u8ba1\u7b97\u8282\u70b9\u4e2d\u7684\u673a\u5668\u4f1a\u51fa\u73b0\u6709\u7684\u673a\u5668\u8d44\u6e90\u4f7f\u7528\u7387\u7e41\u5fd9\uff0c\u6709\u7684\u5374\u7a7a\u95f2\uff0c\u56e0\u4e3a\u8ba1\u7b97\u8282\u70b9\u4e0d\u77e5\u9053\u5f7c\u6b64\u7684\u8fd0\u884c\u8d1f\u8f7d\u72b6\u6001\u3002<\/li>\n
- \u600e\u4e48\u53bb\u901a\u77e5\u6bcf\u4e2a\u8282\u70b9\u5f7c\u6b64\u7684\u8d1f\u8f7d\u72b6\u6001\uff0c\u600e\u4e48\u4fdd\u8bc1\u901a\u77e5\u6bcf\u4e2a\u8ba1\u7b97\u8282\u70b9\u65b9\u5f0f\u7684\u53ef\u9760\u6027\u548c\u5b9e\u65f6\u6027\u3002<\/li>\n<\/ol>\n
\u5148\u4e0d\u8bf4\u90a3\u4e48\u591a\u4e13\u4e1a\u540d\u8bcd\uff0c\u767d\u8bdd\u6765\u8bf4\u6211\u4eec\u9700\u8981\u7684\u662f...<\/p>\n