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https://issues.apache.org/jira/browse/HADOOP-13949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15801066#comment-15801066
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Steve Loughran commented on HADOOP-13949:
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# always curious about auth
# a lot of the large clusters use caching DNS servers on every host. Why? those
large clusters can overload DNS infrastructures of organisations, or, in the
case of search/index engines, small countries.
> Hadoop could provide IP instead of hostname to represent the node, which can
> reduce the DNS hostname resolution consumption
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-13949
> URL: https://issues.apache.org/jira/browse/HADOOP-13949
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Reporter: DENG FEI
>
> Normally,Hadoop use hostname represent the node,such as
> datanode,nodemanager,will lookup nameserver at rack resolve or create rpc
> connnect .
> May be could provide a chance use ip walk around dns resolution.
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