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https://issues.apache.org/jira/browse/HADOOP-993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12480188
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dhruba borthakur commented on HADOOP-993:
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My proposal is to remove storing Datanode information int he fsimage. When the
namenode restarts, it receives a registration message from each datanode. This
registration message has the necessary information to uniquely identify the
datanode.
This also means that after a namenode restart, the list of dead-nodes do not
show up in our UI.
> 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
> Components: dfs
> 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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