进程
------------------
[hdfs]start-dfs.sh
NameNode NN
DataNode DN
SecondaryNamenode 2NN
[yarn]start-yarn.sh
ResourceMananger RM
NodeManager NM
脚本分析
-------------------
sbin/start-all.sh
--------------
libexec/hadoop-config.sh
start-dfs.sh
start-yarn.sh
sbin/start-dfs.sh
--------------
libexec/hadoop-config.sh
sbin/hadoop-daemons.sh --config .. --hostname .. start namenode ...
sbin/hadoop-daemons.sh --config .. --hostname .. start datanode ...
sbin/hadoop-daemons.sh --config .. --hostname .. start sescondarynamenode ...
sbin/hadoop-daemons.sh --config .. --hostname .. start zkfc ... //
sbin/start-yarn.sh
--------------
libexec/yarn-config.sh
bin/yarn-daemon.sh start resourcemanager
bin/yarn-daemons.sh start nodemanager
sbin/hadoop-daemons.sh
----------------------
libexec/hadoop-config.sh
slaves
hadoop-daemon.sh
sbin/hadoop-daemon.sh
-----------------------
libexec/hadoop-config.sh
bin/hdfs ....
sbin/yarn-daemon.sh
-----------------------
libexec/yarn-config.sh
bin/yarn
bin/hadoop
------------------------
hadoop verion //版本
hadoop fs //文件系统客户端.
hadoop jar //
hadoop classpath
hadoop checknative
bin/hdfs
------------------------
dfs // === hadoop fs
classpath
namenode -format
secondarynamenode
namenode
journalnode
zkfc
datanode
dfsadmin
haadmin
fsck
balancer
jmxget
mover
oiv
oiv_legacy
oev
fetchdt
getconf
groups
snapshotDiff
lsSnapshottableDir
portmap
nfs3
cacheadmin
crypto
storagepolicies
version
hdfs常用命令
--------------------
$>hdfs dfs -mkdir /user/centos/hadoop
$>hdfs dfs -ls -r /user/centos/hadoop
$>hdfs dfs -lsr /user/centos/hadoop
$>hdfs dfs -put index.html /user/centos/hadoop
$>hdfs dfs -get /user/centos/hadoop/index.html a.html
$>hdfs dfs -rm -r -f /user/centos/hadoop
