Eric Owhadi created TRAFODION-1421:
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Summary: Implement parallel Scanner primitive
Key: TRAFODION-1421
URL: https://issues.apache.org/jira/browse/TRAFODION-1421
Project: Apache Trafodion
Issue Type: Improvement
Components: sql-cmp, sql-exe
Reporter: Eric Owhadi
Fix For: 2.0-incubating
ClientScanner API is serial, to conserve key ordering. However, many operators
don't care about ordering and would rather get the scan result fast, regardless
of order. This JIRA is about providing a parallel scanner, that would take care
of splitting the work between all region servers evenly if possible. HBase had
a parallel scanner in the pipe for quite some time HBAse-9272, but the work is
stalled since october 2013. However, looking at the available code, look like a
big part can be leveraged without requiring an HBase custom build.
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