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https://issues.apache.org/jira/browse/HDFS-13227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shashikant Banerjee updated HDFS-13227:
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Description: This Jira proposes to add an API in
DirectoryWithSnapshotFeature#f DirectoryDiffList which will return minimal list
of diffs needed to combine to get the cumulative diff between two given
snapshots. The same method will be made use while constructing the childrenList
for a directory. DirectoryWithSnapshotFeature#getChildrenList and
DirectoryWithSnapshotFeature#computeDiffBetweenSnapshots will make use of the
same method to get the cumulative diff. When snapshotSkipList, with minimal set
of diffs to combine in order to get the cumulative diff, the overall
computation will be faster. (was: This Jira proposes to add an API in
DirectoryWithSnapshotFeature#f DirectoryDiffList which will return minimal list
of diffs needed to combine to get the cumulative diff between two given
snapshots. The same method will be made use while constructing the childrenList
for a directory. DirectoryWithSnapshotFeature#getChildrenList and
DirectoryWithSnapshotFeature#computeDiffBetweenSnapshots will make use of the
same method to get the cumulative diff. When snapshotSkipList, with minimal set
of diffs to combine in order to get the cumulative diff, the overall
computation will be faster.)
> Add a method to calculate cumulative diff over multiple snapshots in
> DirectoryDiffList
> ---------------------------------------------------------------------------------------
>
> Key: HDFS-13227
> URL: https://issues.apache.org/jira/browse/HDFS-13227
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: snapshots
> Reporter: Shashikant Banerjee
> Assignee: Shashikant Banerjee
> Priority: Major
>
> This Jira proposes to add an API in DirectoryWithSnapshotFeature#f
> DirectoryDiffList which will return minimal list of diffs needed to combine
> to get the cumulative diff between two given snapshots. The same method will
> be made use while constructing the childrenList for a directory.
> DirectoryWithSnapshotFeature#getChildrenList and
> DirectoryWithSnapshotFeature#computeDiffBetweenSnapshots will make use of the
> same method to get the cumulative diff. When snapshotSkipList, with minimal
> set of diffs to combine in order to get the cumulative diff, the overall
> computation will be faster.
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