.2.jar:/usr/local/hadoop/bin/../lib/paranamer-generator-2.2.jar:/usr/local/hadoop/bin/../lib/qdox-1.10.1.jar:/usr/local/hadoop/bin/../lib/servlet-api-2.5-6.1.14.jar:/usr/local/hadoop/bin/../lib/slf4j-api-1.5.11.jar:/usr/local/hadoop/bin/../lib/slf4j-log4j12-1.5.11.jar:/usr/local/hadoop/bin/../lib/xmlenc-0.52.jar:/usr/local/hadoop/bin/../lib/jsp-2.1/*.jar:/usr/local/hadoop/hdfs/bin/../conf:/usr/local/hadoop/hdfs/bin/../hadoop-hdfs-*.jar:/usr/local/hadoop/hdfs/bin/../lib/*.jar:/usr/local/hadoop/bin/../mapred/conf:/usr/local/hadoop/bin/../mapred/hadoop-mapred-*.jar:/usr/local/hadoop/bin/../mapred/lib/*.jar:/usr/local/hadoop/hdfs/bin/../hadoop-hdfs-*.jar:/usr/local/hadoop/hdfs/bin/../lib/*.jar
STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.21 -r 985326; compiled by 'tomwhite' on Tue Aug 17 01:02:28 EDT 2010
************************************************************/
Re-format filesystem in /usr/local/hadoop/tmp/dfs/name ? (Y or N) y
Format aborted in /usr/local/hadoop/tmp/dfs/name
11/06/16 13:04:17 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at namenode/172.16.101.251
************************************************************/
k. 启动Hadoop ./bin/start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-mapred.sh
starting namenode, logging to /usr/local/hadoop//logs/hadoop-root-namenode-namenode.out
datanode1: starting datanode, logging to /usr/local/hadoop/bin/../logs/hadoop-root-datanode-datanode1.out
datanode2: starting datanode, logging to /usr/local/hadoop/bin/../logs/hadoop-root-datanode-datanode2.out
datanode3: starting datanode, logging to /usr/local/hadoop/bin/../logs/hadoop-root-datanode-datanode3.out
namenode: starting secondarynamenode, logging to /usr/local/hadoop/bin/../logs/hadoop-root-secondarynamenode-namenode.out
starting jobtracker, logging to /usr/local/hadoop//logs/hadoop-root-jobtracker-namenode.out
datanode3: starting tasktracker, logging to /usr/local/hadoop/bin/../logs/hadoop-root-tasktracker-datanode3.out
datanode2: starting tasktracker, logging to /usr/local/hadoop/bin/../logs/hadoop-root-tasktracker-datanode2.out
datanode1: starting tasktracker, logging to /usr/local/hadoop/bin/../logs/hadoop-root-tasktracker-datanode1.out
启动后用命令JPS查看结果如下:
[root@ hadoop]# jps
1806 Jps
1368 NameNode
1694 JobTracker
1587 SecondaryNameNode
然后到Datanode1/2/3上去查看,执行JPS,结果如下:
[root@datanode2 hadoop]# jps
1440 Jps
1382 TaskTracker
1303 DataNode
[root@datanode2 hadoop]# jps
1382 TaskTracker
1303 DataNode
1452 Jps
说明你成功集群安装了Hadoop
7. HDFS操作
运行bin/目录的hadoop命令，可以查看Haoop所有支持的操作及其用法，这里以几个简单的操作为例。
建立目录
[root@ hadoop]# ./bin/hadoop dfs -mkdir testdir
在HDFS中建立一个名为testdir的目录
复制文件
[root@ hadoop]# ./bin/hadoop dfs -put /home/dbrg/large.zip testfile.zip
把本地文件large.zip拷贝到HDFS的根目录/user/dbrg/下，文件名为testfile.zip
查看现有文件
[root@ hadoop]# ./bin/hadoop dfs -ls