Hadoop安装部署笔记之(2)

7. 格式化namenode

--分别在各节点进行格式化

[grid@rac2 bin]$ pwd

/home/grid/Hadoop-0.20.2/bin

[grid@gc bin]$ ./hadoop namenode –format

12/10/31 08:03:31 INFO namenode.NameNode: STARTUP_MSG:

/************************************************************

STARTUP_MSG: Starting NameNode

STARTUP_MSG: host = gc.localdomain/192.168.2.100

STARTUP_MSG: args = [-format]

STARTUP_MSG: version = 0.20.2

STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010

************************************************************/

12/10/31 08:03:31 INFO namenode.FSNamesystem: fsOwner=grid,hadoop

12/10/31 08:03:31 INFO namenode.FSNamesystem: supergroup=supergroup

12/10/31 08:03:31 INFO namenode.FSNamesystem: isPermissionEnabled=true

12/10/31 08:03:32 INFO common.Storage: Image file of size 94 saved in 0 seconds.

12/10/31 08:03:32 INFO common.Storage: Storage directory /tmp/hadoop-grid/dfs/name has been successfully formatted.

12/10/31 08:03:32 INFO namenode.NameNode: SHUTDOWN_MSG:

/************************************************************

SHUTDOWN_MSG: Shutting down NameNode at gc.localdomain/192.168.2.100

************************************************************/

8. 启动hadoop

--master节点启动hadoop守护进程

[grid@gc bin]$ pwd

/home/grid/hadoop-0.20.2/bin

[grid@gc bin]$./start-all.sh

starting namenode, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-namenode-gc.localdomain.out

rac2: starting datanode, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-datanode-rac2.localdomain.out

rac1: starting datanode, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-datanode-rac1.localdomain.out

The authenticity of host 'gc (192.168.2.100)' can't be established.

RSA key fingerprint is 8e:47:42:44:bd:e2:28:64:10:40:8e:b5:72:f9:6c:82.

Are you sure you want to continue connecting (yes/no)? yes

gc: Warning: Permanently added 'gc,192.168.2.100' (RSA) to the list of known hosts.

gc: starting secondarynamenode, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-secondarynamenode-gc.localdomain.out

starting jobtracker, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-jobtracker-gc.localdomain.out

rac2: starting tasktracker, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-tasktracker-rac2.localdomain.out

rac1: starting tasktracker, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-tasktracker-rac1.localdomain.out

9. jps检验各后台进程是否成功启动

--master节点查看后台进程

[grid@gc bin]$ /usr/java/jdk1.6.0_18/bin/jps

27462 NameNode

29012 Jps

27672 JobTracker

27607 SecondaryNameNode

--slave节点查看后台进程

[grid@rac1 conf]$/usr/java/jdk1.6.0_18/bin/jps

16722 Jps

16672 TaskTracker

16577 DataNode

[grid@rac2 conf]$/usr/java/jdk1.6.0_18/bin/jps

31451 DataNode

31547 TaskTracker

31608 Jps

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