[jira] [Created] (HDDS-3915) Simple trash emptier on OM

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

Siyao Meng created HDDS-3915:
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             Summary: Simple trash emptier on OM
                 Key: HDDS-3915
                 URL: https://issues.apache.org/jira/browse/HDDS-3915
             Project: Hadoop Distributed Data Store
          Issue Type: Improvement
          Components: Ozone Manager
            Reporter: Siyao Meng
            Assignee: Siyao Meng


Implementation something similar to HDFS's {{NameNode#startTrashEmptier}} on OzoneManager to enable automatic trash clean up.

Some thoughts:
1. Ozone doesn't support efficient directory renaming (not until HDDS-2939 is fully merged).
- Possible solution: Override {{TrashPolicyDefault}} by setting {{fs.trash.classname}} in {{core-site.xml}}. So we can move files under {/.Trash/<timestamp_of_delete>/} instead of {/.Trash/Current/} to avoid folder renaming during checkpointing. - But this {{fs.trash.classname}} might affect ALL other FileSystems if configured in {{core-site.xml}}. - If there a way to only apply the config to o3fs and ofs.



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