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https://issues.apache.org/jira/browse/HDFS-8986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15237909#comment-15237909
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Xiao Chen commented on HDFS-8986:
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Thanks Gautam for creating this, and everyone for the discussion.
I feel adding an option to exclude would be the better option to go for
compatibility reasons. We should also update [the
doc|https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/FileSystemShell.html#du]
to include this, and also document the current behavior of the going 1-level
deep logic (code
[here|https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/FsUsage.java#L146]).
[~ggop], are you working on this? I can work on it or continue on what you
already have, if you're busy.
> Add option to -du to calculate directory space usage excluding snapshots
> ------------------------------------------------------------------------
>
> Key: HDFS-8986
> URL: https://issues.apache.org/jira/browse/HDFS-8986
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: snapshots
> Reporter: Gautam Gopalakrishnan
> Assignee: Gautam Gopalakrishnan
>
> When running {{hadoop fs -du}} on a snapshotted directory (or one of its
> children), the report includes space consumed by blocks that are only present
> in the snapshots. This is confusing for end users.
> {noformat}
> $ hadoop fs -du -h -s /tmp/parent /tmp/parent/*
> 799.7 M 2.3 G /tmp/parent
> 799.7 M 2.3 G /tmp/parent/sub1
> $ hdfs dfs -createSnapshot /tmp/parent snap1
> Created snapshot /tmp/parent/.snapshot/snap1
> $ hadoop fs -rm -skipTrash /tmp/parent/sub1/*
> ...
> $ hadoop fs -du -h -s /tmp/parent /tmp/parent/*
> 799.7 M 2.3 G /tmp/parent
> 799.7 M 2.3 G /tmp/parent/sub1
> $ hdfs dfs -deleteSnapshot /tmp/parent snap1
> $ hadoop fs -du -h -s /tmp/parent /tmp/parent/*
> 0 0 /tmp/parent
> 0 0 /tmp/parent/sub1
> {noformat}
> It would be helpful if we had a flag, say -X, to exclude any snapshot related
> disk usage in the output
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