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How to refresh HDFS rack topology changes without restarting namenodes

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How to refresh HDFS rack topology changes without restarting namenodes

New Contributor

After adding new datanodes to the existing cluster and updating topology file. I am not able to refresh the namenode to pick up rack of the new node. It puts under `/default-rack`.

 

Anyway to refresh the rack topology changes without restarting namenodes? 

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Re: How to refresh HDFS rack topology changes without restarting namenodes

Expert Contributor

@rda3mon Currently the feature you are looking for is not available, but for future version there is a jira in place - https://issues.apache.org/jira/browse/HDFS-11242

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Re: How to refresh HDFS rack topology changes without restarting namenodes

Expert Contributor

@rda3mon Currently the feature you are looking for is not available, but for future version there is a jira in place - https://issues.apache.org/jira/browse/HDFS-11242

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Re: How to refresh HDFS rack topology changes without restarting namenodes

New Contributor

Thanks for pointing me to the patch. 

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Re: How to refresh HDFS rack topology changes without restarting namenodes

New Contributor

For those who are looking for hdfs behind hbase solution. You can use Hbase favored node rack awareness, which depends on hdfs "net.topology.script.file.name" and more importantly refreshes dynamically. That worked for me perfectly. 

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