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Posted to issues@ozone.apache.org by "Hemant Kumar (Jira)" <ji...@apache.org> on 2023/01/24 22:33:00 UTC

[jira] [Assigned] (HDDS-7566) Refactor RocksDBCheckpointDiffer class

     [ https://issues.apache.org/jira/browse/HDDS-7566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hemant Kumar reassigned HDDS-7566:
----------------------------------

    Assignee: Hemant Kumar

> Refactor RocksDBCheckpointDiffer class
> --------------------------------------
>
>                 Key: HDDS-7566
>                 URL: https://issues.apache.org/jira/browse/HDDS-7566
>             Project: Apache Ozone
>          Issue Type: Sub-task
>            Reporter: Hemant Kumar
>            Assignee: Hemant Kumar
>            Priority: Major
>
> Currently, `RocksDBCheckpointDiffer` does lots of things (e.g. maintaining the DAG, implements RocksDB listener, diff two snapshots and probably remove/update of snapshot from DAG too) which makes it complicated and harder to test because of tight coupling with RocksDB.
> `RocksDbCheckpointDiffer` can be simplified by extracting out the DAG to new class `RocksDbCompactionDag` which maintains SST DAG in which you can add nodes & arcs, load the DAG from disk/DB, remove nodes and arcs, etc. DAG is independent of what we use to store compaction log (disk or RocksDB). We should be able to test all the functionality of `RocksDbCompactionDag` independently.



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