Hadoop添加datanode或者tasktracker节点

lihu129c

[xiaoyu@hadoop01 hadoop-1.1.2]$ scp -r conf hadoop03:~/hadoop-1.1.2/log4j.properties              100% 4441 4.3KB/s 00:00 capacity-scheduler.xml             100% 7457 7.3KB/s 00:00 configuration.xsl              100% 535 0.5KB/s 00:00 fair-scheduler.xml              100% 327 0.3KB/s 00:00 hdfs-site.xml              100% 319 0.3KB/s 00:00 slaves               100% 18 0.0KB/s 00:00 ssl-server.xml.example             100% 1195 1.2KB/s 00:00 hadoop-policy.xml              100% 4644 4.5KB/s 00:00 taskcontroller.cfg              100% 382 0.4KB/s 00:00 mapred-queue-acls.xml             100% 2033 2.0KB/s 00:00 ssl-client.xml.example             100% 1243 1.2KB/s 00:00 masters               100% 9 0.0KB/s 00:00 core-site.xml              100% 441 0.4KB/s 00:00 hadoop-env.sh              100% 2271 2.2KB/s 00:00 hadoop-metrics2.properties             100% 1488 1.5KB/s 00:00　　mapred-site.xml              100% 261 0.3KB/s 00:00
　　4. 启动新节点
4.1 在新节点启动集群服务[xiaoyu@hadoop03 hadoop-1.1.2]$ bin/hadoop-daemon.sh start datanode　　starting datanode, logging to /home/xiaoyu/hadoop-1.1.2/libexec/../logs/hadoop-xiaoyu-datanode-hadoop03.out
　　[xiaoyu@hadoop03 hadoop-1.1.2]$ bin/hadoop-daemon.sh start tasktracker
　　starting tasktracker, logging to /home/xiaoyu/hadoop-1.1.2/libexec/../logs/hadoop-xiaoyu-tasktracker-hadoop03.out
　　5. 检查新节点的启动情况
在这里hadoop01为namenode节点这里有三种方法，当然执行命令的方法最简便。　　5.1 Namenode状态页面:http://hadoop01:50070

　　具体信息如下图

5.2 Jobtracker状态页面:http://hadoop01:50030

　　具体信息如下图：

5.3 任意节点为上执行$ bin/hadoop dfsadmin -report Configured Capacity: 32977600512 (30.71 GB)Present Capacity: 20209930240 (18.82 GB)DFS Remaining: 20003794944 (18.63 GB)DFS Used: 206135296 (196.59 MB)DFS Used%: 1.02%Under replicated blocks: 1Blocks with corrupt replicas: 0Missing blocks: 0-------------------------------------------------Datanodes available: 2 (2 total, 0 dead)Name: 192.168.88.172:50010Decommission Status : NormalConfigured Capacity: 16488800256 (15.36 GB)DFS Used: 205955072 (196.41 MB)Non DFS Used: 6369054720 (5.93 GB)DFS Remaining: 9913790464(9.23 GB)DFS Used%: 1.25%DFS Remaining%: 60.12%Last contact: Fri Sep 13 03:35:51 CST 2013Name: 192.168.88.173:50010Decommission Status : NormalConfigured Capacity: 16488800256 (15.36 GB)DFS Used: 180224 (176 KB)Non DFS Used: 6398615552 (5.96 GB)DFS Remaining: 10090004480(9.4 GB)DFS Used%: 0%DFS Remaining%: 61.19%　　Last contact: Fri Sep 13 03:35:50 CST 2013
　　6. 使正在运行的计算分布到新的数据节点上
　　[xiaoyu@hadoop01 hadoop-1.1.2]$ ./bin/start-balancer.sh
　　starting balancer, logging to /home/xiaoyu/hadoop-1.1.2/libexec/../logs/hadoop-xiaoyu-balancer-hadoop01.out
　　[xiaoyu@hadoop01 hadoop-1.1.2]$
　　这个脚本很有用，大家也可以根据实际需要修改这个脚本。