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How much free space do I need to rebalance a HDFS data node?

New Contributor

I have a HDFS data node that has reached 100% disk usage and has completely filled a disk. Some of the other data nodes in the cluster have very lo utilisation (<20%). I would like to rebalance the cluster but since the disk is at 100% it doesn't seem to be able to rebalance. How much free space do I need to have on a data node in order for HDFS to rebalance it?


The above was originally posted in the Community Help Track. On Wed May 22 03:25 UTC 2019, a member of the HCC moderation staff moved it to the Hadoop Core Track. The Community Help Track is intended for questions about using the HCC site itself.

Bill Brooks, Community Moderator
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