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https://issues.apache.org/jira/browse/HDFS-15513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17199938#comment-17199938
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JiangHua Zhu commented on HDFS-15513:
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Hi, [~smeng] , here is a method (DFSClient#getSnapshotListing()) to find
snapshot data according to the directory.
I don't know if it is what you want.
> Allow client to query snapshot status on one directory
> ------------------------------------------------------
>
> Key: HDFS-15513
> URL: https://issues.apache.org/jira/browse/HDFS-15513
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs, hdfs-client
> Affects Versions: 3.3.0
> Reporter: Siyao Meng
> Priority: Major
>
> Alternatively, we can allow the client to query snapshot status on *a list
> of* given directories by the client. Thoughts?
> Rationale:
> At the moment, we could only retrieve the full list of snapshottable
> directories with
> [{{getSnapshottableDirListing()}}|https://github.com/apache/hadoop/blob/233619a0a462ae2eb7e7253b6bb8ae48eaa5eb19/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java#L6986-L6994].
> This leads to the inefficiency In HDFS-15492 that we have to get the
> *entire* list of snapshottable directory to check if a file being deleted is
> inside a snapshottable directory.
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