zhanghaobo created HDFS-16368:
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Summary: DFSAdmin supports refresh topology info without
restarting namenode
Key: HDFS-16368
URL: https://issues.apache.org/jira/browse/HDFS-16368
Project: Hadoop HDFS
Issue Type: New Feature
Components: dfsadmin, namanode
Affects Versions: 3.3.1, 2.7.7
Reporter: zhanghaobo
Attachments: 0001.patch
Currently in HDFS, if we update the rack info for rack-awareness, we may need
to rolling restart namenodes to let it be effective. If cluster is large, the
cost time of rolling restart namenodes is very log. So, we develope a method to
refresh topology info without rolling restart namenodes.
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