查看狀態(tài)

bin/hdfs dfsadmin -safemode get

進(jìn)入安全模式

[root@master hadoop]# bin/hdfs dfsadmin -safemode enter 19/11/03 05:24:20 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Safe mode is ON

退出安全模式

[root@master hadoop]# bin/hdfs dfsadmin -safemode leave 19/11/03 05:24:30 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Safe mode is OFF

修改配置文件

也可修改安全閥值
修改hdfs-site.xml

設(shè)置安全閥值屬性，屬性值默認(rèn)為0.999f，如果設(shè)為1則不進(jìn)行安全檢查，
大于1將永久的處于安全模式

<property><name>dfs.safemode.threshold.pct</name><value>0.999f</value><description>Specifies the percentage of blocks that should satisfythe minimal replication requirement defined by dfs.replication.min.Values less than or equal to 0 mean not to wait for any particularpercentage of blocks before exiting safemode.Values greater than 1 will make safe mode permanent.</description> </property>

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