Jiandan Yang created HDFS-12390:
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Summary: Supporting DNS to switch mapping
Key: HDFS-12390
URL: https://issues.apache.org/jira/browse/HDFS-12390
Project: Hadoop HDFS
Issue Type: New Feature
Components: hdfs, hdfs-client
Reporter: Jiandan Yang
Assignee: Jiandan Yang
As described in [HDFS-12200|https://issues.apache.org/jira/browse/HDFS-12200],
ScriptBasedMapping may lead to NN cpu 100%. ScriptBasedMapping run
sub_processor to get rack info of DN/Client, so we think it's a little heavy.
We prepare to use TableMappingļ¼but TableMapping does not support refresh and
can not reload rack info of newly added DataNodes.
So we implement it.
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