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https://issues.apache.org/jira/browse/HADOOP-993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12471427
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Konstantin Shvachko commented on HADOOP-993:
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What does datanode to storageID map mean?
Currently namenode stores DatanodeDescriptors in its checkpoint in order to be
able to
show missing nodes on the web UI during startup. Do you propose an alternative?
I do not understand the problem from your description.
> Namenode does not need to store any data node info persistently.
> ----------------------------------------------------------------
>
> Key: HADOOP-993
> URL: https://issues.apache.org/jira/browse/HADOOP-993
> Project: Hadoop
> Issue Type: Improvement
> Reporter: Raghu Angadi
> Assigned To: Sameer Paranjpye
>
> Namenode does not need to serialize datanode info. It will map datanode to
> storageID when datanode register.
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