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https://issues.apache.org/jira/browse/HDFS-8535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14573360#comment-14573360
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Andrew Wang commented on HDFS-8535:
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Hmm, so it seems like the main clarification we want to make is that this can
differ from {{du}} output, for reasons like replication and snapshots, since
-report is the raw disk usage vs. logical file sizes. Maybe we add some more
text to explain this?
> Clarify that dfs usage in dfsadmin -report output includes all block replicas.
> ------------------------------------------------------------------------------
>
> Key: HDFS-8535
> URL: https://issues.apache.org/jira/browse/HDFS-8535
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: HDFS
> Affects Versions: 2.7.0
> Reporter: Lei (Eddy) Xu
> Assignee: Lei (Eddy) Xu
> Priority: Minor
> Labels: docs, site
> Attachments: HDFS-8535.000.patch
>
>
> Some user get confused about this and think it is just space used by the
> files forgetting about the additional replicas that take up space.
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