Huang Kuan Hao created HDDS-16217:
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Summary: Avoid the flatten-and-regroup in the OmKeyInfo copy
constructor
Key: HDDS-16217
URL: https://issues.apache.org/jira/browse/HDDS-16217
Project: Apache Ozone
Issue Type: Sub-task
Reporter: Huang Kuan Hao
Assignee: Huang Kuan Hao
OmKeyInfo.Builder(OmKeyInfo) copies each version by passing getLocationList()
to the (long, List, boolean) constructor, which immediately regroups the
flattened list back into a version map — so the flatten is pure overhead:
obj.keyLocationVersions.forEach(keyLocationVersion ->
this.omKeyLocationInfoGroups.add(
new OmKeyLocationInfoGroup(keyLocationVersion.getVersion(),
keyLocationVersion.getLocationList(),
keyLocationVersion.isMultipartKey())));
Fix: pass new HashMap<>(keyLocationVersion.getLocationVersionMap()) to the
map-taking constructor — this skips the flatten-and-regroup while keeping the
map spine independent from the source. Behavior unchanged.
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