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https://issues.apache.org/jira/browse/HDFS-4170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496704#comment-13496704
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Aaron T. Myers commented on HDFS-4170:
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bq. Yes, a snapshot path is supposed to be a path under an already-created
snapshot, e.g. /foo/.snapshot/s1/bar. However, it also includes non-existing
snapshots since paths may be provided by users. They could pass paths
containing non-existing snapshots.
Got it, makes sense. Might want to make it clear in the comment then how that
case could occur, and also clearly define "snapshot path" and "non-snapshot
path."
> Add snapshot information to INodesInPath
> ----------------------------------------
>
> Key: HDFS-4170
> URL: https://issues.apache.org/jira/browse/HDFS-4170
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Fix For: Snapshot (HDFS-2802)
>
> Attachments: h4170_20121108.patch, h4170_20121109.patch
>
>
> For snapshot paths, the snapshot information is required for accessing the
> snapshot.
> For non-snapshot paths, the latest snapshot found in the path is required for
> maintaining diffs for modification.
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