Kadir OZDEMIR created PHOENIX-5558:
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Summary: Eliminate the second single data row scan during read
repairs
Key: PHOENIX-5558
URL: https://issues.apache.org/jira/browse/PHOENIX-5558
Project: Phoenix
Issue Type: Improvement
Affects Versions: 5.1.0
Reporter: Kadir OZDEMIR
Assignee: Kadir OZDEMIR
Initially GlobalIndexChecker used a raw scan to rebuild an index row in order
to replay delete markers while rebuilding the row. Although a single index row
was rebuilt, the number of mutations that are replayed could be one or more.
Because of this, GlobalIndexChecker could not determine if the data table row
corresponding to the unverified index row exists or not by just looking at the
mutation count returned by UngroupedAggregateRegionObserver. Thus,
GlobalIndexChecker had to do another single row scan on the data table to find
out if the data table row exist. After PHOENIX-5535, GlobalIndexChecker does
not use raw scans anymore. This means that the second single data table row
scan during the read repair can be eliminated.
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