jojochuang opened a new pull request, #10065:
URL: https://github.com/apache/ozone/pull/10065
## What changes were proposed in this pull request?
HDDS-14996. Add metrics to track Snapshot backup SST file stats.
Please describe your PR in detail:
- Added SstBackupDirSize and SstBackupSstFilesCount metrics to
OMSnapshotDirectoryMetrics to track disk space usage and file counts for the
backup SST
directory.
- Refactored calculation logic into a reusable calculateDirSize helper
that handles both snapshots and backup SST directories while maintaining
inode-based deduplication for hard-linked files.
- Initialized metrics in the constructor to ensure reliability and avoid
NullPointerException during testing.
- Added TestOMSnapshotDirectoryMetrics.java to verify the new metrics and
ensured Java 8 compatibility.
## What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-14996
## How was this patch tested?
New unit tests
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