HDDS-13874. Get rid of SnapshotCompactionDag #9678
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What changes were proposed in this pull request?
This PR refactors the snapshot compaction tracking mechanism by replacing
SnapshotCompactionDagwith a new flush-based tracking system usingFlushLinkedListand related components.Major changes:
CompactionDagandCompactionNodeclasses that tracked compaction operations in a DAG structureFlushLinkedList: Tracks flush operations in a linked list structureFlushNode: Represents a single flush operation with snapshot generation metadataFlushLogEntry: DAO for writing flush log entries to the flush log tableFlushFileInfo: Metadata for flushed SST filesWhat is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-13874
How was this patch tested?
GitHub Actions CI: https://github.com/echonesis/ozone/actions/runs/21389340168