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https://issues.apache.org/jira/browse/HDFS-10797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Mackrory updated HDFS-10797:
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Attachment: HDFS-10797.004.patch
Attaching the patch I meant to attach yesterday: this adds test cases for
various inter-directory rename cases. In this patch, some of the test cases
(specifically, the ones that check the space used by multiple directories) are
expecting incorrect output. Also moved my logic outside of the loop so it
applied to a large scope, and indeed - more of the test cases were now behaving
correctly, but still not 100% correctly.
> Disk usage summary of snapshots causes renamed blocks to get counted twice
> --------------------------------------------------------------------------
>
> Key: HDFS-10797
> URL: https://issues.apache.org/jira/browse/HDFS-10797
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Sean Mackrory
> Assignee: Sean Mackrory
> Attachments: HDFS-10797.001.patch, HDFS-10797.002.patch,
> HDFS-10797.003.patch, HDFS-10797.004.patch
>
>
> DirectoryWithSnapshotFeature.computeContentSummary4Snapshot calculates how
> much disk usage is used by a snapshot by tallying up the files in the
> snapshot that have since been deleted (that way it won't overlap with regular
> files whose disk usage is computed separately). However that is determined
> from a diff that shows moved (to Trash or otherwise) or renamed files as a
> deletion and a creation operation that may overlap with the list of blocks.
> Only the deletion operation is taken into consideration, and this causes
> those blocks to get represented twice in the disk usage tallying.
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