Meng-Shuan Tsai created HDDS-16204:
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Summary: Avoid the per-group list copy in
ContainerToKeyMapping.getContainers
Key: HDDS-16204
URL: https://issues.apache.org/jira/browse/HDDS-16204
Project: Apache Ozone
Issue Type: Improvement
Reporter: Meng-Shuan Tsai
Assignee: Meng-Shuan Tsai
{{ContainerToKeyMapping.getContainers}} ({{ozone debug om
container-key-mapping}}) only checks whether a key's blocks fall in the
requested container IDs, but it calls
{{OmKeyLocationInfoGroup.getLocationList()}} for every version group. That
accessor is documented as not O(1); it flatten-copies into a new List.
{{getLocationLists()}} returns {{locationVersionMap.values()}} with no copy.
The method does not keep the flattened list; it adds matching container IDs to
a HashSet. Iterate {{getLocationLists()}} instead. Behavior unchanged.
Related: HDDS-16183.
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