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https://issues.apache.org/jira/browse/HDFS-2162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13188261#comment-13188261
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Tsz Wo (Nicholas), SZE commented on HDFS-2162:
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NodeType is used in Storage and Upgrade while NamenodeRole is used in
BackupNode. It does not make sense to pass DATA_NODE to BackupNode and,
similarly, it does not make sense to pass BACKUP/CHECKPOINT to Storage. Thus,
it may be better to keep two enums.
BTW, the enum names do sound confusing. How about renaming NodeType to
StorageType.
> Merge NameNode roles into NodeType.
> -----------------------------------
>
> Key: HDFS-2162
> URL: https://issues.apache.org/jira/browse/HDFS-2162
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Affects Versions: 0.23.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Priority: Minor
>
> Currently Namenode has {{NamenodeRole}} with roles NAMENODE, BACKUP and
> CHECKPOINT. {{NodeType}} has node types NAME_NODE and DATA_NODE. Merge
> NamenodeRole into NodeType.
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