hadoop中dfsadmin的全称

Hadoop 中的 `dfsadmin` 全称为 `HDFS Administration CLI`，是 Hadoop 分布式文件系统（HDFS）的命令行管理工具，用于管理、监控和诊断 HDFS 的运行。`dfsadmin` 可以执行许多操作，例如列出当前 HDFS 集群的数据块信息、设置安全模式、查看 NameNode 的状态，以及修复损坏的数据块等。

`dfsadmin` 命令的使用非常广泛，对于 Hadoop 集群的管理和维护非常重要，是 Hadoop 管理员必须掌握的技能之一。

相关问题

hadoop dfsadmin -report

The "hadoop dfsadmin -report" command is used in Hadoop to get a summary report of the status of the distributed file system (DFS). This command provides information on the total number of nodes in the cluster, the amount of storage available, and the amount of storage used. It also shows the status of each DataNode in the cluster, including the amount of storage each node is using and the amount of data being transferred between nodes. This command is useful for monitoring the health of the Hadoop cluster, identifying any issues or problems, and optimizing performance.

hadoop dfsadmin _report

The "hadoop dfsadmin -report" command is used to get a report of the current status of the Hadoop Distributed File System (HDFS). This command provides information on the total capacity, used capacity, remaining capacity, and number of blocks in the HDFS. It also shows the number of live and dead data nodes, and their respective storage capacities. Additionally, this command provides information on the rack topology of the data nodes, and the distribution of data blocks across the data nodes. This report is useful for monitoring the health and performance of the HDFS, and for identifying any issues or imbalances in the data distribution.