Huang Kuan Hao created HDDS-16215:
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Summary: Avoid the per-group list copy in
OmMetadataManagerImpl.getBlocksForKeyDelete
Key: HDDS-16215
URL: https://issues.apache.org/jira/browse/HDDS-16215
Project: Apache Ozone
Issue Type: Sub-task
Reporter: Huang Kuan Hao
Assignee: Huang Kuan Hao
getBlocksForKeyDelete flatten-copies each version group only to stream it once
into DeletedBlock items:
for (OmKeyLocationInfoGroup keyLocations : info.getKeyLocationVersions()) {
List<DeletedBlock> item = keyLocations.getLocationList().stream()
.map(b -> new DeletedBlock(
new BlockID(b.getContainerID(), b.getLocalID()),
b.getLength(),
QuotaUtil.getReplicatedSize(b.getLength(),
info.getReplicationConfig()),
QuotaUtil.getSizePerReplica(b.getLength(),
info.getReplicationConfig())))
.collect(Collectors.toList());
...
}
Fix: keyLocations.getLocationLists().stream().flatMap(List::stream). Behavior
unchanged.
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