HDFS common commands

hdfs shell.sh

## run hdfs balancer
sudo -u hdfs hdfs balancer

## hdfs health check
sudo -u hdfs hdfs fsck

## restore deleted files. For hive user
hdfs mv /User/hive/.Trash/source /target

## set replication
sudo -u hdfs hdfs dfs -setrep -w 1 /

## check size
hadoop fs -du -h /user/hive/warehouse/smarttv.db/programdata
hadoop fs -du -s -h /user/hive/warehouse/smarttv.db/programdata

## clear trash
hdfs dfs -expunge

## format namenode
sudo -u hdfs hadoop namenode -format


## distcp

sudo -u hdfs hadoop distcp /hbase hdfs://172.27.140.78/