hadoop叢集線上添加datanode

1,按照如下方法配置安裝hadoop伺服器，完成準備配置

http://blog.csdn.net/hijk139/article/details/8307343

2，修改master主機的slave配置，添加所需的dataname的主機名或者IP位址

3，啟動datanode節點上的相關程序

$ cd path/to/hadoop

$ bin/hadoop-daemon.sh start datanode

$ bin/hadoop-daemon.sh start tasktracker

4，驗證

程序存在jps

[[email protected] tmp]$ jps

13838 Jps

9163 TaskTracker

30971 Application

8230 DataNode

20733 SecondaryNameNode

20538 NameNode

20865 JobTracker

檢視更詳細的節點資訊

[[email protected] tmp]$  hadoop dfsadmin -report

Warning: $HADOOP_HOME is deprecated.

Configured Capacity: 34803168522240 (31.65 TB)

Present Capacity: 17580382365257 (15.99 TB)

DFS Remaining: 9858973999104 (8.97 TB)

DFS Used: 7721408366153 (7.02 TB)

DFS Used%: 43.92%

Under replicated blocks: 1599

Blocks with corrupt replicas: 0

Missing blocks: 0

-------------------------------------------------

Datanodes available: 3 (3 total, 0 dead)

Name:  192.168.0.6:50010

Decommission Status : Normal

Configured Capacity: 15853401194496 (14.42 TB)

DFS Used: 3860704572802 (3.51 TB)

Non DFS Used: 8530007943806 (7.76 TB)

DFS Remaining: 3462688677888(3.15 TB)

DFS Used%: 24.35%

DFS Remaining%: 21.84%

Last contact: Mon Mar 31 17:11:08 CST 2014

Name:  192.168.0.1:50010

Decommission Status : Normal

Configured Capacity: 15853401194496 (14.42 TB)

DFS Used: 3860162642063 (3.51 TB)

Non DFS Used: 8529116761969 (7.76 TB)

DFS Remaining: 3464121790464(3.15 TB)

DFS Used%: 24.35%

DFS Remaining%: 21.85%

Last contact: Mon Mar 31 17:11:07 CST 2014

Name:  192.168.0.5:50010

Decommission Status : Normal

Configured Capacity: 3096366133248 (2.82 TB)

DFS Used: 541151288 (516.08 MB)

Non DFS Used: 163661451208 (152.42 GB)

DFS Remaining: 2932163530752(2.67 TB)

DFS Used%: 0.02%

DFS Remaining%: 94.7%

Last contact: Mon Mar 31 17:11:08 CST 2014

參考文檔

http://wiki.apache.org/hadoop/FAQ#I_have_a_new_node_I_want_to_add_to_a_running_Hadoop_cluster.3B_how_do_I_start_services_on_just_one_node.3F