Github user eowhadi commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/510#discussion_r65262111
--- Diff:
core/sqf/src/seatrans/hbase-trx/src/main/java/org/apache/hadoop/hbase/client/TrafParallelClientScanner.java.tmpl
---
@@ -116,21 +116,22 @@ public class TrafParallelClientScanner extends
AbstractClientScanner implements
LOG.debug("Found "+locs.size()+" region(s).");
if (locs.size() == 0) return;
+ int threads = parallelScaling>1.0 ?(int)Math.ceil(parallelScaling) :
(int)Math.ceil(locs.size() * parallelScaling);
+
--- End diff --
there is 2 ways to set DOP: as a % of regions to scan, or define the number
of thread manually.
parallelScaling = 0 disabled.
0<parallelScaling<=1.0, DOP expressed as percentage of regions to scan. 1.0
means 100%, .2 means 20%,
parallelScanner > 1.0, parallelScanner should be an integer number
representing the number of thread you want. If you define parallelScanner > 1
but not integer, we convert using ceiling...
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