Hadoop Safe Mode (Maintenance Mode) Commands

Hadoop Safe Mode (Maintenance Mode) Commands

The following dfsadmin commands helps the cluster to enter or leave safe mode, which is also called as maintenance mode. In this mode, Namenode does not accept any changes to the name space, it does not replicate or delete blocks.

Command	Description
hadoop dfsadmin -safemode enter	Enter safe mode
hadoop dfsadmin -safemode leave	Leave safe mode
hadoop dfsadmin -safemode get	Get the status of mode
hadoop dfsadmin -safemode wait	Wait until HDFS finishes data block replication

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Hadoop Namenode Commands Hadoop fsck Commands Hadoop Job Commands Hadoop dfsadmin Commands Hadoop Safe Mode (Maintenance Mode) Commands Hadoop Configuration Files Hadoop mradmin Commands Hadoop Balancer Commands Hadoop Filesystem Commands Additional Hadoop Filesystem Commands