在Ubuntu上管理Hadoop分布式文件系统(HDFS)涉及多个方面,包括安装、配置、监控、权限管理等。以下是一些关键步骤和技巧:
sudo apt-get update
sudo apt-get install openjdk-8-jdk
sudo update-alternatives --config java # 选择合适的Java版本
~/.bashrc
文件,添加Hadoop的bin目录到PATH环境变量中:export HADOOP_HOME=/path/to/hadoop
export PATH=$PATH:$HADOOP_HOME/bin
hdfs namenode -format
start-dfs.sh
start-yarn.sh
hdfs dfsadmin -report
hdfs dfs -mkdir /path/to/directory
hdfs dfs -ls /path/to/directory
hdfs dfs -put local_file_path /hdfs_destination_path
hdfs dfs -get /hdfs_source_path local_destination_path
hdfs dfs -rm /path/to/file_or_directory
hdfs dfs -chmod [-R] <MODE[,MODE]... | OCTALMODE> <path> ...
hdfs dfs -chown [-R] [OWNER][:[GROUP]] <path> ...
hdfs dfs -text /data/output/part-r-00000.gz
hdfs dfs -du [-s] [-h] [-v] [-x] <path> ...
hdfs dfsadmin -report
hdfs dfs -mkdir /path/to/directory
hdfs dfs -ls /path/to/directory
hdfs dfs -put local_file_path /hdfs_destination_path
hdfs dfs -get /hdfs_source_path local_destination_path
hdfs dfs -rm /path/to/file_or_directory
yarn application -list
yarn application -status ApplicationID
yarn application -kill ApplicationID
dfs.blocksize
参数来调整块大小。dfs.replication
参数来设置副本数。通过以上步骤和技巧,可以在Ubuntu上高效地配置和管理HDFS,确保其高性能和可靠性。