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From "Jiandan Yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-12390) Supporting DNS to switch mapping
Date Mon, 04 Sep 2017 06:28:00 GMT
Jiandan Yang  created HDFS-12390:

             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 TableMappingļ¼Œbut  TableMapping does
not support refresh and can not reload rack info of newly added DataNodes.
So we implement it.

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