{"id":593,"date":"2018-08-24T12:47:58","date_gmt":"2018-08-24T04:47:58","guid":{"rendered":"https:\/\/www.chenweikang.top\/?p=593"},"modified":"2018-08-24T12:49:01","modified_gmt":"2018-08-24T04:49:01","slug":"%e6%9e%84%e5%bb%ba%e9%ab%98%e5%8f%af%e7%94%a8zookeeper%e9%9b%86%e7%be%a4","status":"publish","type":"post","link":"https:\/\/www.chenweikang.top\/?p=593","title":{"rendered":"\u6784\u5efa\u9ad8\u53ef\u7528ZooKeeper\u96c6\u7fa4"},"content":{"rendered":"
\n

ZooKeeper \u662f Apache \u7684\u4e00\u4e2a\u9876\u7ea7\u9879\u76ee\uff0c\u4e3a\u5206\u5e03\u5f0f\u5e94\u7528\u63d0\u4f9b\u9ad8\u6548\u3001\u9ad8\u53ef\u7528\u7684\u5206\u5e03\u5f0f\u534f\u8c03\u670d\u52a1\uff0c\u63d0\u4f9b\u4e86\u8bf8\u5982\u6570\u636e\u53d1\u5e03\/\u8ba2\u9605\u3001\u8d1f\u8f7d\u5747\u8861\u3001\u547d\u540d\u670d\u52a1\u3001\u5206\u5e03\u5f0f\u534f\u8c03\/\u901a\u77e5\u548c\u5206\u5e03\u5f0f\u9501\u7b49\u5206\u5e03\u5f0f\u57fa\u7840\u670d\u52a1\u3002\u7531\u4e8e ZooKeeper \u4fbf\u6377\u7684\u4f7f\u7528\u65b9\u5f0f\u3001\u5353\u8d8a\u7684\u6027\u80fd\u548c\u826f\u597d\u7684\u7a33\u5b9a\u6027\uff0c\u88ab\u5e7f\u6cdb\u5730\u5e94\u7528\u4e8e\u8bf8\u5982 Hadoop\u3001HBase\u3001Kafka \u548c Dubbo \u7b49\u5927\u578b\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u3002<\/p>\n

\u672c\u6587\u7684\u76ee\u6807\u8bfb\u8005\u662f\u5bf9 ZooKeeper \u6709\u4e00\u5b9a\u4e86\u89e3\u7684\u6280\u672f\u4eba\u5458\uff0c\u5c06\u4ece ZooKeeper \u8fd0\u884c\u6a21\u5f0f\u3001\u96c6\u7fa4\u7ec4\u6210\u3001\u5bb9\u707e\u548c\u6c34\u5e73\u6269\u5bb9\u56db\u65b9\u9762\u9010\u6b65\u6df1\u5165\uff0c\u6700\u7ec8\u6784\u5efa\u51fa\u9ad8\u53ef\u7528\u7684 ZooKeeper \u96c6\u7fa4\u3002<\/p><\/blockquote>\n

\"\"<\/p>\n

<\/h2>\n

\u4e00\u3001\u8fd0\u884c\u6a21\u5f0f<\/strong><\/h2>\n

Zookeeper \u6709\u4e09\u79cd\u8fd0\u884c\u6a21\u5f0f\uff1a\u5355\u673a\u6a21\u5f0f\u3001\u4f2a\u96c6\u7fa4\u6a21\u5f0f\u548c\u96c6\u7fa4\u6a21\u5f0f\u3002<\/p>\n

1.1 \u5355\u673a\u6a21\u5f0f<\/strong><\/h3>\n

\u8fd9\u79cd\u6a21\u5f0f\u4e00\u822c\u9002\u7528\u4e8e\u5f00\u53d1\u6d4b\u8bd5\u73af\u5883\uff0c\u4e00\u65b9\u9762\u6211\u4eec\u6ca1\u6709\u90a3\u4e48\u591a\u673a\u5668\u8d44\u6e90\uff0c\u53e6\u5916\u5c31\u662f\u5e73\u65f6\u7684\u5f00\u53d1\u8c03\u8bd5\u5e76\u4e0d\u9700\u8981\u6781\u597d\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n

\u5728 Linux \u73af\u5883\u4e0b\u8fd0\u884c\u5355\u673a\u6a21\u5f0f\u9700\u8981\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

1. \u51c6\u5907 Java \u8fd0\u884c\u73af\u5883<\/strong><\/h4>\n

\u5b89\u88c5 Java 1.6 \u6216\u66f4\u9ad8\u7248\u672c\u7684 JDK\uff0c\u5e76\u914d\u7f6e\u597d Java \u76f8\u5173\u7684\u73af\u5883\u53d8\u91cf $JAVA_HOME\u00a0\u3002<\/p>\n

2. \u4e0b\u8f7d ZooKeeper \u5b89\u88c5\u5305<\/strong><\/h4>\n

\u4e0b\u8f7d\u5730\u5740\uff1ahttp:\/\/zookeeper.apache.org\/releases.html<\/a>\u3002\u9009\u62e9\u6700\u65b0\u7684 stable \u7248\u672c\u5e76\u89e3\u538b\u5230\u6307\u5b9a\u76ee\u5f55\uff0c\u6211\u4eec\u7528 $ZK_HOME \u8868\u793a\u8be5\u76ee\u5f55\u3002<\/p>\n

3. \u914d\u7f6e zoo.cfg<\/strong><\/h4>\n

\u9996\u6b21\u4f7f\u7528 ZooKeeper\uff0c\u9700\u8981\u5c06\u00a0$ZK_HOME \u4e0b\u7684 zoo_sample.cfg \u6587\u4ef6\u91cd\u547d\u540d\u4e3a zoo.cfg\uff0c\u5e76\u8fdb\u884c\u4ee5\u4e0b\u914d\u7f6e<\/p>\n

\n
\n
\n\n\n\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n<\/td>\n
\n
\n
tickTime=<\/code>2000<\/code>\u00a0\u00a0\u00a0\u00a0##Zookeeper\u6700\u5c0f\u65f6\u95f4\u5355\u5143\uff0c\u5355\u4f4d\u6beb\u79d2(ms)\uff0c\u9ed8\u8ba4\u503c\u4e3a<\/code>3000<\/code><\/div>\n
dataDir=\/var\/lib\/zookeeper\u00a0\u00a0\u00a0 ##Zookeeper\u670d\u52a1\u5668\u5b58\u50a8\u5feb\u7167\u6587\u4ef6\u7684\u76ee\u5f55\uff0c\u5fc5\u987b\u914d\u7f6e<\/code><\/div>\n
dataLogDir=\/var\/lib\/log\u00a0\u00a0\u00a0\u00a0 ##Zookeeper\u670d\u52a1\u5668\u5b58\u50a8\u4e8b\u52a1\u65e5\u5fd7\u7684\u76ee\u5f55\uff0c\u9ed8\u8ba4\u4e3adataDir<\/code><\/div>\n
clientPort=<\/code>2181<\/code>\u00a0\u00a0\u00a0\u00a0##\u670d\u52a1\u5668\u5bf9\u5916\u670d\u52a1\u7aef\u53e3\uff0c\u4e00\u822c\u8bbe\u7f6e\u4e3a<\/code>2181<\/code><\/div>\n
initLimit=<\/code>5<\/code>\u00a0\u00a0\u00a0\u00a0##Leader\u670d\u52a1\u5668\u7b49\u5f85Follower\u542f\u52a8\u5e76\u5b8c\u6210\u6570\u636e\u540c\u6b65\u7684\u65f6\u95f4\uff0c\u9ed8\u8ba4\u503c<\/code>10<\/code>\uff0c\u8868\u793atickTime\u7684<\/code>10<\/code>\u500d<\/code><\/div>\n
syncLimit=<\/code>2<\/code>\u00a0\u00a0\u00a0\u00a0##Leader\u670d\u52a1\u5668\u548cFollower\u4e4b\u95f4\u8fdb\u884c\u5fc3\u8df3\u68c0\u6d4b\u7684\u6700\u5927\u5ef6\u65f6\u65f6\u95f4\uff0c\u9ed8\u8ba4\u503c<\/code>5<\/code>\uff0c\u8868\u793atickTime\u7684<\/code>5<\/code>\u500d<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

4. \u542f\u52a8\u670d\u52a1<\/strong><\/h4>\n

\u4f7f\u7528 $ZK_HOME\/bin \u76ee\u5f55\u4e0b\u7684 zkServer.sh \u811a\u672c\u8fdb\u884c\u670d\u52a1\u7684\u542f\u52a8\u3002<\/p>\n

1.2 \u96c6\u7fa4\u6a21\u5f0f<\/strong><\/h3>\n

\u4e00\u4e2a ZooKeeper \u96c6\u7fa4\u901a\u5e38\u7531\u4e00\u7ec4\u673a\u5668\u7ec4\u6210\uff0c\u4e00\u822c 3 \u53f0\u4ee5\u4e0a\u5c31\u53ef\u4ee5\u7ec4\u6210\u4e00\u4e2a\u53ef\u7528\u7684 ZooKeeper \u96c6\u7fa4\u4e86\u3002<\/p>\n

\u7ec4\u6210 ZooKeeper \u96c6\u7fa4\u7684\u6bcf\u53f0\u673a\u5668\u90fd\u4f1a\u5728\u5185\u5b58\u4e2d\u7ef4\u62a4\u5f53\u524d\u7684\u670d\u52a1\u5668\u72b6\u6001\uff0c\u5e76\u4e14\u6bcf\u53f0\u673a\u5668\u4e4b\u95f4\u90fd\u4f1a\u4e92\u76f8\u4fdd\u6301\u901a\u4fe1\u3002<\/p>\n

\u91cd\u8981\u7684\u4e00\u70b9\u662f\uff0c\u53ea\u8981\u96c6\u7fa4\u4e2d\u5b58\u5728\u8d85\u8fc7\u4e00\u534a\u7684\u673a\u5668\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\uff0c\u90a3\u4e48\u6574\u4e2a\u96c6\u7fa4\u5c31\u80fd\u591f\u6b63\u5e38\u5bf9\u5916\u670d\u52a1\u3002<\/p><\/blockquote>\n

ZooKeeper \u7684\u5ba2\u6237\u7aef\u7a0b\u5e8f\u4f1a\u9009\u62e9\u548c\u96c6\u7fa4\u4e2d\u7684\u4efb\u610f\u4e00\u53f0\u670d\u52a1\u5668\u521b\u5efa\u4e00\u4e2a TCP \u8fde\u63a5\uff0c\u800c\u4e14\u4e00\u65e6\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u65ad\u5f00\u8fde\u63a5\uff0c\u5ba2\u6237\u7aef\u5c31\u4f1a\u81ea\u52a8\u8fde\u63a5\u5230\u96c6\u7fa4\u4e2d\u7684\u5176\u4ed6\u670d\u52a1\u5668\u3002<\/p>\n

\"\"<\/p>\n

\u90a3\u4e48\u5982\u4f55\u8fd0\u884c ZooKeeper \u96c6\u7fa4\u6a21\u5f0f\u5462\uff1f\u9996\u5148\u5047\u5982\u6211\u4eec\u6709\u4e09\u53f0\u670d\u52a1\u5668\uff0cIP \u5206\u522b\u4e3a IP1<\/sub>\u3001IP2<\/sub>\u00a0\u548c IP3<\/sub>\uff0c\u5219\u9700\u8981\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

1. \u51c6\u5907 Java \u8fd0\u884c\u73af\u5883\uff08\u540c\u4e0a\uff09<\/strong><\/h4>\n

2. \u4e0b\u8f7d ZooKeeper \u5b89\u88c5\u5305\uff08\u540c\u4e0a\uff09<\/strong><\/h4>\n

3. \u914d\u7f6e zoo.cfg<\/strong><\/h4>\n
\n
\n
\n\n\n\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n<\/td>\n
\n
\n
tickTime=<\/code>2000<\/code><\/div>\n
dataDir=\/var\/lib\/zookeeper<\/code><\/div>\n
dataLogDir=\/var\/lib\/log<\/code><\/div>\n
clientPort=<\/code>2181<\/code><\/div>\n
initLimit=<\/code>5<\/code><\/div>\n
syncLimit=<\/code>2<\/code><\/div>\n
server.<\/code>1<\/code>=IP1:<\/code>2888<\/code>:<\/code>3888<\/code><\/div>\n
server.<\/code>2<\/code>=IP2:<\/code>2888<\/code>:<\/code>3888<\/code><\/div>\n
server.<\/code>3<\/code>=IP3:<\/code>2888<\/code>:<\/code>3888<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u53ef\u4ee5\u770b\u5230\uff0c\u76f8\u6bd4\u4e8e\u5355\u673a\u6a21\u5f0f\uff0c\u96c6\u7fa4\u6a21\u5f0f\u591a\u4e86 server.id=host:port1<\/sub>:port2<\/sub>\u00a0\u7684\u914d\u7f6e\u3002<\/p><\/blockquote>\n

\u5176\u4e2d\uff0cid \u88ab\u79f0\u4e3a Server ID\uff0c\u7528\u6765\u6807\u8bc6\u8be5\u673a\u5668\u5728\u96c6\u7fa4\u4e2d\u7684\u673a\u5668\u5e8f\u53f7\uff08\u5728\u6bcf\u53f0\u673a\u5668\u7684 dataDir \u76ee\u5f55\u4e0b\u521b\u5efa myid \u6587\u4ef6\uff0c\u6587\u4ef6\u5185\u5bb9\u5373\u4e3a\u8be5\u673a\u5668\u5bf9\u5e94\u7684\u00a0Server ID \u6570\u5b57\uff09\u3002host \u4e3a\u673a\u5668 IP\uff0cport1<\/sub>\u00a0\u7528\u4e8e\u6307\u5b9a Follower \u670d\u52a1\u5668\u4e0e Leader \u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\u548c\u6570\u636e\u540c\u6b65\u7684\u7aef\u53e3\uff0cport2<\/sub>\u7528\u4e8e\u8fdb\u884c Leader \u9009\u4e3e\u8fc7\u7a0b\u4e2d\u7684\u6295\u7968\u901a\u4fe1\u3002<\/p>\n

4. \u521b\u5efa myid \u6587\u4ef6<\/strong><\/h4>\n

\u5728 dataDir \u76ee\u5f55\u4e0b\u521b\u5efa\u540d\u4e3a myid \u7684\u6587\u4ef6\uff0c\u5728\u6587\u4ef6\u7b2c\u4e00\u884c\u5199\u4e0a\u5bf9\u5e94\u7684 Server ID\u3002<\/p>\n

5. \u6309\u7167\u76f8\u540c\u6b65\u9aa4\uff0c\u4e3a\u5176\u4ed6\u673a\u5668\u914d\u7f6e zoo.cfg \u548c myid\u6587\u4ef6<\/strong><\/h4>\n

6. \u542f\u52a8\u670d\u52a1<\/strong><\/h4>\n

1.3 \u4f2a\u96c6\u7fa4\u6a21\u5f0f<\/strong><\/h3>\n

\u8fd9\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u96c6\u7fa4\u6a21\u5f0f\uff0c\u5373\u96c6\u7fa4\u7684\u6240\u6709\u670d\u52a1\u5668\u90fd\u90e8\u7f72\u5728\u4e00\u53f0\u673a\u5668\u4e0a\u3002\u5f53\u4f60\u624b\u5934\u4e0a\u6709\u4e00\u53f0\u6bd4\u8f83\u597d\u7684\u673a\u5668\uff0c\u5982\u679c\u4f5c\u4e3a\u5355\u673a\u6a21\u5f0f\u8fdb\u884c\u90e8\u7f72\uff0c\u5c31\u4f1a\u6d6a\u8d39\u8d44\u6e90\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cZooKeeper\u5141\u8bb8\u4f60\u5728\u4e00\u53f0\u673a\u5668\u4e0a\u901a\u8fc7\u542f\u52a8\u4e0d\u540c\u7684\u7aef\u53e3\u6765\u542f\u52a8\u591a\u4e2a ZooKeeper \u670d\u52a1\u5b9e\u4f8b\uff0c\u4ee5\u6b64\u6765\u4ee5\u96c6\u7fa4\u7684\u7279\u6027\u6765\u5bf9\u5916\u670d\u52a1\u3002<\/p>\n

\u8fd9\u79cd\u6a21\u5f0f\u4e0b\uff0c\u53ea\u9700\u8981\u628a zoo.cfg \u505a\u5982\u4e0b\u4fee\u6539\uff1a<\/p>\n

\n
\n
\n\n\n\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n<\/td>\n
\n
\n
tickTime=<\/code>2000<\/code><\/div>\n
dataDir=\/var\/lib\/zookeeper<\/code><\/div>\n
dataLogDir=\/var\/lib\/log<\/code><\/div>\n
clientPort=<\/code>2181<\/code><\/div>\n
initLimit=<\/code>5<\/code><\/div>\n
syncLimit=<\/code>2<\/code><\/div>\n
server.<\/code>1<\/code>=IP1:<\/code>2888<\/code>:<\/code>3888<\/code><\/div>\n
server.<\/code>2<\/code>=IP1:<\/code>2889<\/code>:<\/code>3889<\/code><\/div>\n
server.<\/code>3<\/code>=IP1:<\/code>2890<\/code>:<\/code>3890<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

<\/h2>\n

\u4e8c\u3001\u96c6\u7fa4\u7ec4\u6210<\/strong><\/h2>\n

\u8981\u642d\u5efa\u4e00\u4e2a\u9ad8\u53ef\u7528\u7684 ZooKeeper \u96c6\u7fa4\uff0c\u6211\u4eec\u9996\u5148\u9700\u8981\u786e\u5b9a\u597d\u96c6\u7fa4\u7684\u89c4\u6a21\u3002<\/p>\n

\u5173\u4e8e ZooKeeper \u96c6\u7fa4\u7684\u670d\u52a1\u5668\u7ec4\u6210\uff0c\u76f8\u4fe1\u5f88\u591a\u5bf9 ZooKeeper \u4e86\u89e3\u4f46\u662f\u7406\u89e3\u4e0d\u591f\u6df1\u5165\u7684\u8bfb\u8005\uff0c\u90fd\u5b58\u5728\u6216\u66fe\u7ecf\u5b58\u5728\u8fc7\u8fd9\u6837\u4e00\u4e2a\u9519\u8bef\u7684\u8ba4\u8bc6\uff1a\u4e3a\u4e86\u4f7f\u5f97 ZooKeeper \u96c6\u7fa4\u80fd\u591f\u987a\u5229\u5730\u9009\u4e3e\u51fa Leader\uff0c\u5fc5\u987b\u5c06 ZooKeeper \u96c6\u7fa4\u7684\u670d\u52a1\u5668\u6570\u90e8\u7f72\u6210\u5947\u6570\u3002\u8fd9\u91cc\u6211\u4eec\u9700\u8981\u6f84\u6e05\u7684\u4e00\u70b9\u662f\uff1a\u4efb\u610f\u53f0 ZooKeeper \u670d\u52a1\u5668\u90fd\u80fd\u90e8\u7f72\u4e14\u80fd\u6b63\u5e38\u8fd0\u884c\u3002<\/p><\/blockquote>\n

\u90a3\u4e48\u5b58\u5728\u4e8e\u8fd9\u4e48\u591a\u8bfb\u8005\u4e2d\u7684\u8fd9\u4e2a\u9519\u8bef\u8ba4\u8bc6\u662f\u600e\u4e48\u56de\u4e8b\u5462\uff1f\u5176\u5b9e\u5173\u4e8e ZooKeeper \u96c6\u7fa4\u670d\u52a1\u5668\u6570\uff0cZooKeeper \u5b98\u65b9\u786e\u5b9e\u7ed9\u51fa\u4e86\u5173\u4e8e\u5947\u6570\u7684\u5efa\u8bae\uff0c\u4f46\u7edd\u5927\u90e8\u5206 ZooKeeper \u7528\u6237\u5bf9\u4e8e\u8fd9\u4e2a\u5efa\u8bae\u8ba4\u8bc6\u6709\u504f\u5dee\u3002\u5728\u672c\u4e66\u524d\u9762\u63d0\u5230\u7684\u201c\u8fc7\u534a\u5b58\u6d3b\u5373\u53ef\u7528<\/strong>\u201d\u7279\u6027\u4e2d\uff0c\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u4e86\uff0c\u4e00\u4e2a ZooKeeper \u96c6\u7fa4\u5982\u679c\u8981\u5bf9\u5916\u63d0\u4f9b\u53ef\u7528\u7684\u670d\u52a1\uff0c\u90a3\u4e48\u96c6\u7fa4\u4e2d\u5fc5\u987b\u8981\u6709\u8fc7\u534a\u7684\u673a\u5668\u6b63\u5e38\u5de5\u4f5c\u5e76\u4e14\u5f7c\u6b64\u4e4b\u95f4\u80fd\u591f\u6b63\u5e38\u901a\u4fe1\u3002\u57fa\u4e8e\u8fd9\u4e2a\u7279\u6027\uff0c\u5982\u679c\u60f3\u642d\u5efa\u4e00\u4e2a\u80fd\u591f\u5141\u8bb8 N \u53f0\u673a\u5668 down \u6389\u7684\u96c6\u7fa4\uff0c\u90a3\u4e48\u5c31\u8981\u90e8\u7f72\u4e00\u4e2a\u7531 2*N+1 \u53f0\u670d\u52a1\u5668\u6784\u6210\u7684 ZooKeeper \u96c6\u7fa4\u3002\u56e0\u6b64\uff0c\u4e00\u4e2a\u7531 3 \u53f0\u673a\u5668\u6784\u6210\u7684 ZooKeeper \u96c6\u7fa4\uff0c\u80fd\u591f\u5728\u6302\u6389 1 \u53f0\u673a\u5668\u540e\u4f9d\u7136\u6b63\u5e38\u5de5\u4f5c\uff0c\u800c\u5bf9\u4e8e\u4e00\u4e2a\u7531 5 \u53f0\u670d\u52a1\u5668\u6784\u6210\u7684 ZooKeeper \u96c6\u7fa4\uff0c\u80fd\u591f\u5bf9 2 \u53f0\u673a\u5668\u6302\u6389\u7684\u60c5\u51b5\u8fdb\u884c\u5bb9\u707e\u3002\u6ce8\u610f\uff0c\u5982\u679c\u662f\u4e00\u4e2a\u75316\u53f0\u670d\u52a1\u5668\u6784\u6210\u7684 ZooKeeper \u96c6\u7fa4\uff0c\u540c\u6837\u53ea\u80fd\u591f\u6302\u6389 2 \u53f0\u673a\u5668\uff0c\u56e0\u4e3a\u5982\u679c\u6302\u6389 3 \u53f0\uff0c\u5269\u4e0b\u7684\u673a\u5668\u5c31\u65e0\u6cd5\u5b9e\u73b0\u8fc7\u534a\u4e86\u3002<\/p>\n

\u56e0\u6b64\uff0c\u4ece\u4e0a\u9762\u7684\u8bb2\u89e3\u4e2d\uff0c\u6211\u4eec\u5176\u5b9e\u53ef\u4ee5\u770b\u51fa\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u7531 6 \u53f0\u673a\u5668\u6784\u6210\u7684 ZooKeeper \u96c6\u7fa4\u6765\u8bf4\uff0c\u548c\u4e00\u4e2a\u7531 5 \u53f0\u673a\u5668\u6784\u6210\u7684 ZooKeeper \u96c6\u7fa4\uff0c\u5176\u5728\u5bb9\u707e\u80fd\u529b\u4e0a\u5e76\u6ca1\u6709\u4efb\u4f55\u663e\u8457\u7684\u4f18\u52bf\uff0c\u53cd\u800c\u591a\u5360\u7528\u4e86\u4e00\u4e2a\u670d\u52a1\u5668\u8d44\u6e90\u3002\u57fa\u4e8e\u8fd9\u4e2a\u539f\u56e0\uff0cZooKeeper \u96c6\u7fa4\u901a\u5e38\u8bbe\u8ba1\u90e8\u7f72\u6210\u5947\u6570\u53f0\u670d\u52a1\u5668\u5373\u53ef\u3002<\/p><\/blockquote>\n

 <\/p>\n

\u4e09\u3001\u5bb9\u707e<\/strong><\/h2>\n

\u6240\u8c13\u5bb9\u707e\uff0c\u5728 IT \u884c\u4e1a\u901a\u5e38\u662f\u6307\u6211\u4eec\u7684\u8ba1\u7b97\u673a\u4fe1\u606f\u7cfb\u7edf\u5177\u6709\u7684\u4e00\u79cd\u5728\u906d\u53d7\u8bf8\u5982\u706b\u707e\u3001\u5730\u9707\u3001\u65ad\u7535\u548c\u5176\u4ed6\u57fa\u7840\u7f51\u7edc\u8bbe\u5907\u6545\u969c\u7b49\u6bc1\u706d\u6027\u707e\u96be\u7684\u65f6\u5019\uff0c\u4f9d\u7136\u80fd\u591f\u5bf9\u5916\u63d0\u4f9b\u53ef\u7528\u670d\u52a1\u7684\u80fd\u529b\u3002<\/p>\n

\u5bf9\u4e8e\u4e00\u4e9b\u666e\u901a\u7684\u5e94\u7528\uff0c\u4e3a\u4e86\u8fbe\u5230\u5bb9\u707e\u6807\u51c6\uff0c\u901a\u5e38\u6211\u4eec\u4f1a\u9009\u62e9\u5728\u591a\u53f0\u673a\u5668\u4e0a\u8fdb\u884c\u90e8\u7f72\u6765\u7ec4\u6210\u4e00\u4e2a\u96c6\u7fa4\uff0c\u8fd9\u6837\u5373\u4f7f\u5728\u96c6\u7fa4\u7684\u4e00\u53f0\u6216\u662f\u82e5\u5e72\u53f0\u673a\u5668\u51fa\u73b0\u6545\u969c\u7684\u60c5\u51b5\u4e0b\uff0c\u6574\u4e2a\u96c6\u7fa4\u4f9d\u7136\u80fd\u591f\u5bf9\u5916\u63d0\u4f9b\u53ef\u7528\u7684\u670d\u52a1\u3002<\/p>\n

\u800c\u5bf9\u4e8e\u4e00\u4e9b\u6838\u5fc3\u5e94\u7528\uff0c\u4e0d\u4ec5\u8981\u901a\u8fc7\u4f7f\u7528\u591a\u53f0\u673a\u5668\u6784\u5efa\u96c6\u7fa4\u7684\u65b9\u5f0f\u6765\u63d0\u4f9b\u670d\u52a1\uff0c\u800c\u4e14\u8fd8\u8981\u5c06\u96c6\u7fa4\u4e2d\u7684\u673a\u5668\u90e8\u7f72\u5728\u4e24\u4e2a\u673a\u623f\uff0c\u8fd9\u6837\u7684\u8bdd\uff0c\u5373\u4f7f\u5176\u4e2d\u4e00\u4e2a\u673a\u623f\u906d\u9047\u707e\u96be\uff0c\u4f9d\u7136\u80fd\u591f\u5bf9\u5916\u63d0\u4f9b\u53ef\u7528\u7684\u670d\u52a1\u3002<\/p>\n

\u4e0a\u9762\u8bb2\u5230\u7684\u90fd\u662f\u5e94\u7528\u5c42\u9762\u7684\u5bb9\u707e\u6a21\u5f0f\uff0c\u90a3\u4e48\u5bf9\u4e8e ZooKeeper \u8fd9\u79cd\u5e95\u5c42\u7ec4\u4ef6\u6765\u8bf4\uff0c\u5982\u4f55\u8fdb\u884c\u5bb9\u707e\u5462\uff1f\u8bb2\u5230\u8fd9\u91cc\uff0c\u53ef\u80fd\u591a\u5c11\u8bfb\u8005\u4f1a\u6709\u7591\u95ee\uff0cZooKeeper \u65e2\u7136\u5df2\u7ecf\u89e3\u51b3\u4e86\u5355\u70b9\u95ee\u9898\uff0c\u90a3\u4e3a\u4ec0\u4e48\u8fd8\u8981\u8fdb\u884c\u5bb9\u707e\u5462\uff1f<\/p>\n

3.1 \u5355\u70b9\u95ee\u9898<\/strong><\/h3>\n

\u5355\u70b9\u95ee\u9898\u662f\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\u6700\u5e38\u89c1\u4e5f\u662f\u6700\u7ecf\u5178\u7684\u95ee\u9898\u4e4b\u4e00\uff0c\u5728\u5f88\u591a\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u90fd\u4f1a\u5b58\u5728\u8fd9\u6837\u7684\u5355\u70b9\u95ee\u9898\u3002<\/p>\n

\u5177\u4f53\u5730\u8bf4\uff0c\u5355\u70b9\u95ee\u9898\u662f\u6307\u5728\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u5982\u679c\u67d0\u4e00\u4e2a\u7ec4\u4ef6\u51fa\u73b0\u6545\u969c\u5c31\u4f1a\u5f15\u8d77\u6574\u4e2a\u7cfb\u7edf\u7684\u53ef\u7528\u6027\u5927\u5927\u4e0b\u964d\u751a\u81f3\u662f\u5904\u4e8e\u762b\u75ea\u72b6\u6001\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u8ba4\u4e3a\u8be5\u7ec4\u4ef6\u5b58\u5728\u5355\u70b9\u95ee\u9898\u3002<\/p><\/blockquote>\n

ZooKeeper \u786e\u5b9e\u5df2\u7ecf\u5f88\u597d\u5730\u89e3\u51b3\u4e86\u5355\u70b9\u95ee\u9898\u3002\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u5230\uff0c\u57fa\u4e8e\u201c\u8fc7\u534a\u201d\u8bbe\u8ba1\u539f\u5219\uff0cZooKeeper \u5728\u8fd0\u884c\u671f\u95f4\uff0c\u96c6\u7fa4\u4e2d\u81f3\u5c11\u6709\u8fc7\u534a\u7684\u673a\u5668\u4fdd\u5b58\u4e86\u6700\u65b0\u7684\u6570\u636e\u3002\u56e0\u6b64\uff0c\u53ea\u8981\u96c6\u7fa4\u4e2d\u8d85\u8fc7\u534a\u6570\u7684\u673a\u5668\u8fd8\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\uff0c\u6574\u4e2a\u96c6\u7fa4\u5c31\u80fd\u591f\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n

3.2 \u5bb9\u707e<\/strong><\/h3>\n

\u89e3\u51b3\u4e86\u5355\u70b9\u95ee\u9898\uff0c\u662f\u4e0d\u662f\u8be5\u8003\u8651\u5bb9\u707e\u4e86\u5462\uff1f\u7b54\u6848\u662f\u5426\u5b9a\u7684\uff0c\u5728\u642d\u5efa\u4e00\u4e2a\u9ad8\u53ef\u7528\u7684\u96c6\u7fa4\u7684\u65f6\u5019\u4f9d\u7136\u9700\u8981\u8003\u8651\u5bb9\u707e\u95ee\u9898\u3002\u6b63\u5982\u4e0a\u9762\u8bb2\u5230\u7684\uff0c\u5982\u679c\u96c6\u7fa4\u4e2d\u8d85\u8fc7\u534a\u6570\u7684\u673a\u5668\u8fd8\u5728\u6b63\u5e38\u5de5\u4f5c\uff0c\u96c6\u7fa4\u5c31\u80fd\u591f\u5bf9\u5916\u63d0\u4f9b\u6b63\u5e38\u7684\u670d\u52a1\u3002<\/p>\n

\u90a3\u4e48\uff0c\u5982\u679c\u6574\u4e2a\u673a\u623f\u51fa\u73b0\u707e\u96be\u6027\u7684\u4e8b\u6545\uff0c\u8fd9\u65f6\u663e\u7136\u5df2\u7ecf\u4e0d\u662f\u5355\u70b9\u95ee\u9898\u7684\u8303\u7574\u4e86\u3002<\/p><\/blockquote>\n

\u5728\u8fdb\u884c ZooKeeper \u7684\u5bb9\u707e\u65b9\u6848\u8bbe\u8ba1\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u8981\u5145\u5206\u8003\u8651\u5230\u201c\u8fc7\u534a\u539f\u5219\u201d\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u65e0\u8bba\u53d1\u751f\u4ec0\u4e48\u60c5\u51b5\uff0c\u6211\u4eec\u5fc5\u987b\u4fdd\u8bc1 ZooKeeper \u96c6\u7fa4\u4e2d\u6709\u8d85\u8fc7\u534a\u6570\u7684\u673a\u5668\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\u3002\u56e0\u6b64\uff0c\u901a\u5e38\u6709\u4ee5\u4e0b\u4e24\u79cd\u90e8\u7f72\u65b9\u6848\u3002<\/p>\n

3.3.1 \u53cc\u673a\u623f\u90e8\u7f72<\/strong><\/h4>\n

\u5728\u8fdb\u884c\u5bb9\u707e\u65b9\u6848\u7684\u8bbe\u8ba1\u65f6\uff0c\u6211\u4eec\u901a\u5e38\u662f\u4ee5\u673a\u623f\u4e3a\u5355\u4f4d\u6765\u8003\u8651\u95ee\u9898\u3002\u5728\u73b0\u5b9e\u4e2d\uff0c\u5f88\u591a\u516c\u53f8\u7684\u673a\u623f\u89c4\u6a21\u5e76\u4e0d\u5927\uff0c\u56e0\u6b64\u53cc\u673a\u623f\u90e8\u7f72\u662f\u4e2a\u6bd4\u8f83\u5e38\u89c1\u7684\u65b9\u6848\u3002\u4f46\u662f\u9057\u61be\u7684\u662f\uff0c\u5728\u76ee\u524d\u7248\u672c\u7684 ZooKeeper \u4e2d\uff0c\u8fd8\u6ca1\u6709\u529e\u6cd5\u80fd\u591f\u5728\u53cc\u673a\u623f\u6761\u4ef6\u4e0b\u5b9e\u73b0\u6bd4\u8f83\u597d\u7684\u5bb9\u707e\u6548\u679c\u2014\u2014\u56e0\u4e3a\u65e0\u8bba\u54ea\u4e2a\u673a\u623f\u53d1\u751f\u5f02\u5e38\u60c5\u51b5\uff0c\u90fd\u6709\u53ef\u80fd\u4f7f\u5f97 ZooKeeper \u96c6\u7fa4\u4e2d\u53ef\u7528\u7684\u673a\u5668\u65e0\u6cd5\u8d85\u8fc7\u534a\u6570\u3002\u5f53\u7136\uff0c\u5728\u62e5\u6709\u4e24\u4e2a\u673a\u623f\u7684\u573a\u666f\u4e0b\uff0c\u901a\u5e38\u6709\u4e00\u4e2a\u673a\u623f\u662f\u4e3b\u8981\u673a\u623f\uff08\u4e00\u822c\u800c\u8a00\uff0c\u516c\u53f8\u4f1a\u82b1\u8d39\u66f4\u591a\u7684\u94b1\u53bb\u79df\u7528\u4e00\u4e2a\u7a33\u5b9a\u6027\u66f4\u597d\u3001\u8bbe\u5907\u66f4\u53ef\u9760\u7684\u673a\u623f\uff0c\u8fd9\u4e2a\u673a\u623f\u5c31\u662f\u4e3b\u8981\u673a\u623f\uff0c\u800c\u53e6\u5916\u4e00\u4e2a\u673a\u623f\u5219\u66f4\u52a0\u5ec9\u4ef7\u4e00\u4e9b\uff09\u3002\u6211\u4eec\u552f\u4e00\u80fd\u505a\u7684\uff0c\u5c31\u662f\u5c3d\u91cf\u5728\u4e3b\u8981\u673a\u623f\u90e8\u7f72\u66f4\u591a\u7684\u673a\u5668\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u7531 7 \u53f0\u673a\u5668\u7ec4\u6210\u7684 ZooKeeper \u96c6\u7fa4\uff0c\u901a\u5e38\u5728\u4e3b\u8981\u673a\u623f\u4e2d\u90e8\u7f72 4 \u53f0\u673a\u5668\uff0c\u5269\u4e0b\u7684 3 \u53f0\u673a\u5668\u90e8\u7f72\u5230\u53e6\u5916\u4e00\u4e2a\u673a\u623f\u4e2d\u3002<\/p>\n

3.3.2 \u4e09\u673a\u623f\u90e8\u7f72<\/strong><\/h4>\n

\u65e2\u7136\u5728\u53cc\u673a\u623f\u90e8\u7f72\u6a21\u5f0f\u4e0b\u5e76\u4e0d\u80fd\u5b9e\u73b0\u597d\u7684\u5bb9\u707e\u6548\u679c\uff0c\u90a3\u4e48\u5bf9\u4e8e\u6709\u6761\u4ef6\u7684\u516c\u53f8\uff0c\u9009\u62e9\u4e09\u673a\u623f\u90e8\u7f72\u65e0\u7591\u662f\u4e2a\u66f4\u597d\u7684\u9009\u62e9\uff0c\u65e0\u8bba\u54ea\u4e2a\u673a\u623f\u53d1\u751f\u4e86\u6545\u969c\uff0c\u5269\u4e0b\u4e24\u4e2a\u673a\u623f\u7684\u673a\u5668\u6570\u91cf\u90fd\u8d85\u8fc7\u534a\u6570\u3002\u5047\u5982\u6211\u4eec\u6709\u4e09\u4e2a\u673a\u623f\u53ef\u4ee5\u90e8\u7f72\u670d\u52a1\uff0c\u5e76\u4e14\u8fd9\u4e09\u4e2a\u673a\u623f\u95f4\u7684\u7f51\u7edc\u72b6\u51b5\u826f\u597d\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u5728\u4e09\u4e2a\u673a\u623f\u4e2d\u90fd\u90e8\u7f72\u82e5\u5e72\u4e2a\u673a\u5668\u6765\u7ec4\u6210\u4e00\u4e2a ZooKeeper \u96c6\u7fa4\u3002<\/p>\n

\u6211\u4eec\u5047\u5b9a\u6784\u6210 ZooKeeper \u96c6\u7fa4\u7684\u673a\u5668\u603b\u6570\u4e3a N\uff0c\u5728\u4e09\u4e2a\u673a\u623f\u4e2d\u90e8\u7f72\u7684 ZooKeeper \u670d\u52a1\u5668\u6570\u5206\u522b\u4e3a N1<\/sub>\u3001N2<\/sub>\u00a0\u548c N3<\/sub>\uff0c\u5982\u679c\u8981\u4f7f\u8be5 ZooKeeper \u96c6\u7fa4\u5177\u6709\u8f83\u597d\u7684\u5bb9\u707e\u80fd\u529b\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u5982\u4e0b\u7b97\u6cd5\u6765\u8ba1\u7b97 ZooKeeper \u96c6\u7fa4\u7684\u673a\u5668\u90e8\u7f72\u65b9\u6848\u3002<\/p>\n

1. \u8ba1\u7b97 N1<\/sub><\/strong><\/h5>\n

\u5982\u679c ZooKeeper \u96c6\u7fa4\u7684\u670d\u52a1\u5668\u603b\u6570\u662f N\uff0c\u90a3\u4e48\uff1a<\/p>\n

\n
\n
\n\n\n\n
\n
1<\/div>\n<\/td>\n
\n
\n
N1 = (N-<\/code>1<\/code>)\/<\/code>2<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u5728 Java \u4e2d\uff0c\u201c\/\u201d \u8fd0\u7b97\u7b26\u4f1a\u81ea\u52a8\u5bf9\u8ba1\u7b97\u7ed3\u679c\u5411\u4e0b\u53d6\u6574\u64cd\u4f5c\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5982\u679c N=8\uff0c\u90a3\u4e48 N1<\/sub>=3\uff1b\u5982\u679c N=7\uff0c\u90a3\u4e48 N1<\/sub>\u00a0\u4e5f\u7b49\u4e8e 3\u3002<\/p>\n

2. \u8ba1\u7b97 N2<\/sub>\u00a0\u7684\u53ef\u9009\u503c<\/strong><\/h5>\n

N2<\/sub>\u00a0\u7684\u8ba1\u7b97\u89c4\u5219\u548c N1<\/sub>\u00a0\u975e\u5e38\u7c7b\u4f3c\uff0c\u53ea\u662f N2\u00a0<\/sub>\u7684\u53d6\u503c\u662f\u5728\u4e00\u4e2a\u53d6\u503c\u8303\u56f4\u5185\uff1a<\/p>\n

\n
\n
\n\n\n\n
\n
1<\/div>\n<\/td>\n
\n
\n
N2 \u7684\u53d6\u503c\u8303\u56f4\u662f\u00a0<\/code>1<\/code>~(N-N1)\/<\/code>2<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u5373\u5982\u679c N=8\uff0c\u90a3\u4e48 N1<\/sub>=3\uff0c\u5219 N2<\/sub>\u00a0\u7684\u53d6\u503c\u8303\u56f4\u5c31\u662f 1~2\uff0c\u5206\u522b\u662f 1 \u548c 2\u3002\u6ce8\u610f\uff0c1 \u548c 2 \u4ec5\u4ec5\u662f N2<\/sub>\u00a0\u7684\u53ef\u9009\u503c\uff0c\u5e76\u975e\u6700\u7ec8\u503c\u2014\u2014\u5982\u679c N2<\/sub>\u4e3a\u67d0\u4e2a\u53ef\u9009\u503c\u7684\u65f6\u5019\uff0c\u65e0\u6cd5\u8ba1\u7b97\u51fa N3<\/sub>\u00a0\u7684\u503c\uff0c\u90a3\u4e48\u8be5\u53ef\u9009\u503c\u4e5f\u65e0\u6548\u3002<\/p>\n

3. \u8ba1\u7b97 N3<\/sub>\uff0c\u540c\u65f6\u786e\u5b9a N2<\/sub>\u00a0\u7684\u503c<\/strong><\/h5>\n

\u5f88\u663e\u7136\uff0c\u73b0\u5728\u53ea\u5269\u4e0b N3<\/sub>\u00a0\u4e86\uff0c\u53ef\u4ee5\u7b80\u5355\u7684\u8ba4\u4e3a N3<\/sub>\u00a0\u7684\u53d6\u503c\u5c31\u662f\u5269\u4e0b\u7684\u673a\u5668\u6570\uff0c\u5373\uff1a<\/p>\n

\n
\n
\n\n\n\n
\n
1<\/div>\n<\/td>\n
\n
\n
N3 = N - N1 - N2<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u53ea\u662f N3<\/sub>\u00a0\u7684\u53d6\u503c\u5fc5\u987b\u6ee1\u8db3 N3<\/sub>\u00a0< N1<\/sub>+N2\u3002\u5728\u6ee1\u8db3\u8fd9\u4e2a\u6761\u4ef6\u7684\u57fa\u7840\u4e0b\uff0c\u6211\u4eec\u904d\u5386\u6b65\u9aa4 2 \u4e2d\u8ba1\u7b97\u5f97\u5230\u7684 N2<\/sub>\u00a0\u7684\u53ef\u9009\u503c\uff0c\u5373\u53ef\u5f97\u5230\u4e09\u673a\u623f\u90e8\u7f72\u65f6\u6bcf\u4e2a\u673a\u623f\u7684\u670d\u52a1\u5668\u6570\u91cf\u4e86\u3002<\/p>\n

\u73b0\u5728\u6211\u4eec\u4ee5 7 \u53f0\u673a\u5668\u4e3a\u4f8b\uff0c\u6765\u770b\u770b\u5982\u4f55\u5206\u914d\u4e09\u673a\u623f\u7684\u673a\u5668\u5206\u5e03\u3002\u6839\u636e\u7b97\u6cd5\u7684\u6b65\u9aa4 1\uff0c\u6211\u4eec\u9996\u5148\u786e\u5b9a N1<\/sub>\u00a0\u7684\u53d6\u503c\u4e3a 3\u3002\u6839\u636e\u7b97\u6cd5\u7684\u6b65\u9aa4 2\uff0c\u6211\u4eec\u786e\u5b9a\u4e86 N2<\/sub>\u00a0\u7684\u53ef\u9009\u503c\u4e3a 1 \u548c 2\u3002\u6700\u540e\u6839\u636e\u6b65\u9aa4 3\uff0c\u6211\u4eec\u904d\u5386 N2<\/sub>\u00a0\u7684\u53ef\u9009\u503c\uff0c\u5373\u53ef\u5f97\u5230\u4e24\u79cd\u90e8\u7f72\u65b9\u6848\uff0c\u5206\u522b\u662f (3,1,3) \u548c (3,2,2)\u3002\u4ee5\u4e0b\u662f Java \u7a0b\u5e8f\u4ee3\u7801\u5bf9\u4ee5\u4e0a\u7b97\u6cd5\u7684\u4e00\u79cd\u7b80\u5355\u5b9e\u73b0\uff1a<\/p>\n

\n
\n
\n\n\n\n
\n
1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n
10<\/div>\n
11<\/div>\n
12<\/div>\n
13<\/div>\n
14<\/div>\n
15<\/div>\n
16<\/div>\n
17<\/div>\n<\/td>\n
\n
\n
public<\/code>\u00a0class<\/code>\u00a0Allocation {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>static<\/code>\u00a0final<\/code>\u00a0int<\/code>\u00a0n =\u00a0<\/code>7<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>public<\/code>\u00a0static<\/code>\u00a0void<\/code>\u00a0main(String[] args){<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0n1,n2,n3;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>n1 = (n-<\/code>1<\/code>) \/\u00a0<\/code>2<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0n2_max = (n-n1) \/\u00a0<\/code>2<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>for<\/code>(<\/code>int<\/code>\u00a0i=<\/code>1<\/code>; i<=n2_max; i++){<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>n2 = i;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>n3 = n - n1 -n2;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>(n3 >= (n1+n2)){<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>continue<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>System.out.println(<\/code>\"(\"<\/code>+n1+<\/code>\",\"<\/code>+n2+<\/code>\",\"<\/code>+n3+<\/code>\")\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

 <\/p>\n

\u56db\u3001\u6c34\u5e73\u6269\u5bb9<\/strong><\/h2>\n

\u6c34\u5e73\u53ef\u6269\u5bb9\u53ef\u4ee5\u8bf4\u662f\u5bf9\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u5728\u9ad8\u53ef\u7528\u6027\u65b9\u9762\u63d0\u51fa\u7684\u57fa\u672c\u7684\uff0c\u4e5f\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u4e2a\u8981\u6c42\uff0c\u901a\u8fc7\u6c34\u5e73\u6269\u5bb9\u80fd\u591f\u5e2e\u52a9\u7cfb\u7edf\u5728\u4e0d\u8fdb\u884c\u6216\u8fdb\u884c\u6781\u5c11\u6539\u8fdb\u5de5\u4f5c\u7684\u524d\u63d0\u4e0b\uff0c\u5feb\u901f\u63d0\u9ad8\u7cfb\u7edf\u5bf9\u5916\u7684\u670d\u52a1\u652f\u6491\u80fd\u529b\u3002\u7b80\u5355\u5730\u8bb2\uff0c\u6c34\u5e73\u6269\u5bb9\u5c31\u662f\u5411\u96c6\u7fa4\u4e2d\u6dfb\u52a0\u66f4\u591a\u7684\u673a\u5668\uff0c\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u670d\u52a1\u8d28\u91cf\u3002<\/p>\n

\u5f88\u9057\u61be\u7684\u662f\uff0cZooKeeper \u5728\u6c34\u5e73\u6269\u5bb9\u6269\u5bb9\u65b9\u9762\u505a\u5f97\u5e76\u4e0d\u5341\u5206\u5b8c\u7f8e\uff0c\u9700\u8981\u8fdb\u884c\u6574\u4e2a\u96c6\u7fa4\u7684\u91cd\u542f\u3002\u901a\u5e38\u6709\u4e24\u79cd\u91cd\u542f\u65b9\u5f0f\uff0c\u4e00\u79cd\u662f\u96c6\u7fa4\u6574\u4f53\u91cd\u542f\uff0c\u53e6\u5916\u4e00\u79cd\u662f\u9010\u53f0\u8fdb\u884c\u670d\u52a1\u5668\u7684\u91cd\u542f\u3002<\/p>\n

4.1 \u6574\u4f53\u91cd\u542f<\/strong><\/h3>\n

\u6240\u8c13\u96c6\u7fa4\u6574\u4f53\u91cd\u542f\uff0c\u5c31\u662f\u5148\u5c06\u6574\u4e2a\u96c6\u7fa4\u505c\u6b62\uff0c\u7136\u540e\u66f4\u65b0 ZooKeeper \u7684\u914d\u7f6e\uff0c\u7136\u540e\u518d\u6b21\u542f\u52a8\u3002\u5982\u679c\u5728\u4f60\u7684\u7cfb\u7edf\u4e2d\uff0cZooKeeper \u5e76\u4e0d\u662f\u4e2a\u975e\u5e38\u6838\u5fc3\u7684\u7ec4\u4ef6\uff0c\u5e76\u4e14\u80fd\u591f\u5141\u8bb8\u77ed\u6682\u7684\u670d\u52a1\u505c\u6b62\uff08\u901a\u5e38\u662f\u51e0\u79d2\u949f\u7684\u65f6\u95f4\u95f4\u9694\uff09\uff0c\u90a3\u4e48\u4e0d\u59a8\u9009\u62e9\u8fd9\u79cd\u65b9\u5f0f\u3002\u5728\u6574\u4f53\u91cd\u542f\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6240\u6709\u8be5\u96c6\u7fa4\u7684\u5ba2\u6237\u7aef\u90fd\u65e0\u6cd5\u8fde\u63a5\u4e0a\u96c6\u7fa4\u3002\u7b49\u5230\u96c6\u7fa4\u518d\u6b21\u542f\u52a8\uff0c\u8fd9\u4e9b\u5ba2\u6237\u7aef\u5c31\u80fd\u591f\u81ea\u52a8\u8fde\u63a5\u4e0a\u2014\u2014\u6ce8\u610f\uff0c\u6574\u4f53\u542f\u52a8\u524d\u5efa\u7acb\u8d77\u7684\u5ba2\u6237\u7aef\u4f1a\u8bdd\uff0c\u5e76\u4e0d\u4f1a\u56e0\u4e3a\u6b64\u6b21\u6574\u4f53\u91cd\u542f\u800c\u5931\u6548\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u6574\u4f53\u91cd\u542f\u671f\u95f4\u82b1\u8d39\u7684\u65f6\u95f4\u5c06\u4e0d\u8ba1\u5165\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u7684\u8ba1\u7b97\u4e2d\u3002<\/p>\n

4.2 \u9010\u53f0\u91cd\u542f<\/strong><\/h3>\n

\u8fd9\u79cd\u65b9\u5f0f\u66f4\u9002\u5408\u7edd\u5927\u591a\u6570\u7684\u5b9e\u9645\u573a\u666f\u3002\u5728\u8fd9\u79cd\u65b9\u5f0f\u4e2d\uff0c\u6bcf\u6b21\u4ec5\u4ec5\u91cd\u542f\u96c6\u7fa4\u4e2d\u7684\u4e00\u53f0\u673a\u5668\uff0c\u7136\u540e\u9010\u53f0\u5bf9\u6574\u4e2a\u96c6\u7fa4\u4e2d\u7684\u673a\u5668\u8fdb\u884c\u91cd\u542f\u64cd\u4f5c\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u5728\u91cd\u542f\u671f\u95f4\u4f9d\u7136\u4fdd\u8bc1\u96c6\u7fa4\u5bf9\u5916\u7684\u6b63\u5e38\u670d\u52a1\u3002<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\u53c2\u8003\u6587\u7ae0\uff1a<\/strong>\u300a\u4ecePaxos\u5230Zookeeper \u00a0\u5206\u5e03\u5f0f\u4e00\u81f4\u6027\u539f\u7406\u4e0e\u5b9e\u8df5\u300b<\/p>\n

 <\/p>\n<\/div>\n

\n
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\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a\u5de6\u624b\u4ee3\u7801\u53f3\u624b\u8bd7<\/a> » \u6784\u5efa\u9ad8\u53ef\u7528ZooKeeper\u96c6\u7fa4<\/a><\/p>

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