在目标节点执行

hdfs --daemon stop datanode

创建新目录结构

sudo mkdir -p /data1/dfs/data
sudo chown -R hdfs_user:hadoop /data1/dfs # 替换为实际用户和组
sudo chmod 700 /data1/dfs/data

hdfs --daemon start datanode

hdfs-site.xml添加

<property>
<name>dfs.datanode.data.dir</name>
<value>file://${hadoop.tmp.dir}/dfs/data,file:///data1/dfs/data</value>
</property>

<property>
<name>dfs.datanode.fsdataset.volume.choosing.policy</name>
<value>org.apache.hadoop.hdfs.server.datanode.fsdataset.AvailableSpaceVolumeChoosingPolicy</value>
</property>

<property>
<name>dfs.datanode.available-space-volume-choosing-policy.balanced-space-preference-fraction</name>
<value>0.75</value>
</property>

<property>
<name>dfs.datanode.data.dir.perm</name>
<value>700</value>
</property>

hdfs diskbalancer -plan hadoop03

hdfs diskbalancer -execute /system/diskbalancer/2025-七月-16-16-32-58/hadoop03.plan.json

hdfs diskbalancer -query hadoop03

hdfs diskbalancer -query hadoop03 | grep -A 5 '00eede5d19cf36652ddf1ca381081e57409a977a'