[jira] [Created] (HDFS-15513) Allow client to query snapshot status on one directory

["Siyao Meng (Jira)" <ji...@apache.org>]

Siyao Meng created HDFS-15513:
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             Summary: 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


Alternatively, we can allow the client to query snapshot status on *a list of* directories, if necessary. 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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