Swaminathan Balachandran created HDDS-11908:
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Summary: Snapshot diff DAG traversal should not skip node based on
prefix presence
Key: HDDS-11908
URL: https://issues.apache.org/jira/browse/HDDS-11908
Project: Apache Ozone
Issue Type: Bug
Reporter: Swaminathan Balachandran
Assignee: Swaminathan Balachandran
Snapshot diff DAG traversal should not skip node based on prefix presence.
Consider the case
Snap1 has 1, 2, 3 files
Say 1,4 compacted to => 5
And 5, 6 => 7
Snap 2 has 7 file.
Now diff b/w Snap1 & Snap2 would be in 4 & 6 sst files.
Consider 1 had +k & 4 had -k
Now 5 would have neither of these files.
But as per this condition:
[https://github.com/apache/ozone/blob/b11b80707d4e6721c06966936ad87063ec107da6/hadoop-hdds/rocksdb-checkpoint-differ/src/main/java/org/apache/ozone/rocksdiff/RocksDBCheckpointDiffer.java#L1009-L1016]
traversal on would skip node 5 thus traversal would never reach 1,4. We should
not have this optmization check. This would end up not using the compaction
even though it is not there.
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