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Jing Zhao commented on HDFS-4758: --------------------------------- bq. it might result in issues where a user has taken a snapshot of /user/foo/dir1 and admin finds that system-wide snaps cannot be taken at say /user dir levels since there are several users with their snapshots at lower directories. This may not be an issue because only admin can allow snapshot on a directory (i.e., to convert a directory to a snapshottable directory). The admin can specify a set of snapshottable directories in the beginning under which no more snapshottable directory will be allowed in the future. > Disallow nested snapshottable directories > ----------------------------------------- > > Key: HDFS-4758 > URL: https://issues.apache.org/jira/browse/HDFS-4758 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: namenode > Reporter: Tsz Wo (Nicholas), SZE > Assignee: Tsz Wo (Nicholas), SZE > > Nested snapshottable directories are supported by the current implementation. > However, it seems that there are no good use cases for nested snapshottable > directories. So we disable it for now until someone has a valid use case for > it. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira