Installation tutorial for hadoop2.5 test environment

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Hadoop command classification:

Hadoop

Hdfs

Yarn

Mapred

Boot sequence:

Sbin/hadoop-daemon.sh start namenode

Sbin/hadoop-daemon.sh start datanode

Sbin/yarn-daemon.sh start resourcemanager

Sbin/yarn-daemon.sh start nodemanager

Sbin/mr-jobhistory-daemon.sh start historyserver

[histtoryserver related to mapreduce]

Use commands [commonly used]

Ps-ef | grep java:

View the startup classes and startup details.

And related configuration information

You can not start snn.

Sbin/hdfs dfsadmin-safemode get

File directory of hdfs:

Folders for user/root/-related frames

Use free-m to view memory usage

Note: it is not for use

Start-all.sh

Start-dfs.sh

Start-yarn.sh

I can't afford to order sn for the time being.

Free-m

Developed in linux.

Maven management. 3.0.5 [configure environment variables]

Mvn-version

Maven's warehouse is under the current user.

Mkdir tools/eclipse

Configure the integration of eclipse and maven plug-ins.

In eclipse:

Usersettings

And another setting.

Create a folder for src/main/source.

Put the file in classpath. Build path configure build path/source

Configure the pom file.

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