[jira] [Created] (HDFS-15479) Add a conf for enforcing ordered snapshot deletion

["Tsz-wo Sze (Jira)" <ji...@apache.org>]

Tsz-wo Sze created HDFS-15479:
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             Summary: Add a conf for enforcing ordered snapshot deletion
                 Key: HDFS-15479
                 URL: https://issues.apache.org/jira/browse/HDFS-15479
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: snapshots
            Reporter: Tsz-wo Sze
            Assignee: Tsz-wo Sze


Ordered snapshot deletion is a configurable feature.  In this JIRA, a conf is added.

When the feature is enabled, only the earliest snapshot can be deleted.  For deleting the non-earliest snapshots, the behavior is temporarily changed to throwing an exception in this JIRA.  In the next JIRA, the behavior of deleting the non-earliest snapshots will be changed to marking them as deleted.



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