Huang Kuan Hao created HDDS-16350:
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Summary: Use isExist instead of a value get for the start-key
check in RDBTable.getRangeKVs
Key: HDDS-16350
URL: https://issues.apache.org/jira/browse/HDDS-16350
Project: Apache Ozone
Issue Type: Improvement
Reporter: Huang Kuan Hao
Assignee: Huang Kuan Hao
RDBTable.getRangeKVs checks whether startKey exists with get(startKey) == null,
a full point-get that materializes and then discards the value byte[],
immediately followed by it.seek(startKey).
Current:
if ((prefix == null || startKey.length > prefix.length)
&& get(startKey) == null) {
// Key not found, return empty list
return result;
}
it.seek(startKey);
isExist(byte[]) already answers this via keyMayExist (bloom filter) and only
point-gets when keyMayExist is undecided, so it does not materialize the value
in the common case and is exact. Fix: use !isExist(startKey). Behavior
unchanged.
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