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https://issues.apache.org/jira/browse/HDFS-9140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14949042#comment-14949042
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Xiaobing Zhou commented on HDFS-9140:
-------------------------------------
By an evaluation, these DN parameters can be reconfigured on the fly with less
risk.
{code}
dfs.datanode.balance.max.concurrent.moves
dfs.datanode.lazywriter.interval.sec
dfs.datanode.ram.disk.low.watermark.percent
dfs.datanode.ram.disk.low.watermark.bytes
dfs.datanode.duplicate.replica.deletion
{code}
> Discover conf parameters that need no DataNode restart to make changes
> effective
> --------------------------------------------------------------------------------
>
> Key: HDFS-9140
> URL: https://issues.apache.org/jira/browse/HDFS-9140
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Xiaobing Zhou
> Assignee: Xiaobing Zhou
>
> This JIRA is to find those parameters that need NN/DN restart in order to
> make the changes, otherwise, using admin facility API to reconfigure them.
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