hdfs dfsadmin

bin/hdfs dfsadmin

Hagrid01@Hagrid01:[/Hagrid/hadoop-2.6.2]bin/hdfs dfsadmin
Usage: hdfs dfsadmin
Note: Administrative commands can only be run as the HDFS superuser.
**[-report [-live] [-dead] [-decommissioning]] 报告集群的状况**
[-safemode <enter | leave | get | wait>]
[-saveNamespace]
[-rollEdits]
[-restoreFailedStorage true|false|check]
[-refreshNodes]
[-setQuota <quota> <dirname>...<dirname>]
[-clrQuota <dirname>...<dirname>]
[-setSpaceQuota <quota> <dirname>...<dirname>]
[-clrSpaceQuota <dirname>...<dirname>]
[-finalizeUpgrade]
[-rollingUpgrade [<query|prepare|finalize>]]
[-refreshServiceAcl]
[-refreshUserToGroupsMappings]
[-refreshSuperUserGroupsConfiguration]
[-refreshCallQueue]
[-refresh <host:ipc_port> <key> [arg1..argn]
[-reconfig <datanode|...> <host:ipc_port> <start|status>]
[-printTopology]
[-refreshNamenodes datanode_host:ipc_port]
[-deleteBlockPool datanode_host:ipc_port blockpoolId [force]]
[-setBalancerBandwidth <bandwidth in bytes per second>]
[-fetchImage <local directory>]
[-allowSnapshot <snapshotDir>]
[-disallowSnapshot <snapshotDir>]
[-shutdownDatanode <datanode_host:ipc_port> [upgrade]]
[-getDatanodeInfo <datanode_host:ipc_port>]
[-metasave filename]
[-setStoragePolicy path policyName]
[-getStoragePolicy path]
[-triggerBlockReport [-incremental] <datanode_host:ipc_port>]
[-help [cmd]]

**[-report [-live] [-dead] [-decommissioning]] 报告集群的状况**

– <property>
<name>dfs.hosts.exclude</name>
<value>exclude_file</value>
</property>

– Exclude_file中加入要去除的节点
– 执行refreshNodes