Help Center/ MapReduce Service/ User Guide (ME-Abu Dhabi Region)/ Troubleshooting/ Using HDFS/ Uneven Data Distribution Due to Non-HDFS Data Residuals

Updated on 2022-02-22 GMT+08:00

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Uneven Data Distribution Due to Non-HDFS Data Residuals

Symptom

Data distribution is uneven. A disk is full while other disks have sufficient space.

The data storage directory of HDFS DataNode is set to /export/data1/dfs--/export/data12/dfs. A large volume of data is stored to /export/data1/dfs but data is evenly distributed to other disks.

Cause Analysis

The customer's disk is reinstalled. However, a directory is not thoroughly deleted during disk uninstallation, that is, the added disk is unformatted and historical junk data remains.

Solution

Manually delete data residuals.

Parent topic: Using HDFS

Previous topic: A File Fails to Be Queried or Deleted, and the File Can Be Viewed in the Parent Directory (Invisible Characters)

Next topic: Uneven Data Distribution Due to the Client Installation on the DataNode

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