ndimiduk commented on a change in pull request #1922:
URL: https://github.com/apache/hbase/pull/1922#discussion_r464645151
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File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.java
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@@ -369,7 +369,8 @@ private boolean skipForMerge(final RegionStates
regionStates, final RegionInfo r
}
final long currentSizeMb = getRegionSizeMB(current);
final long nextSizeMb = getRegionSizeMB(next);
- if (currentSizeMb + nextSizeMb < avgRegionSizeMb) {
+ // always merge away empty regions when they present themselves.
+ if (currentSizeMb == 0 || nextSizeMb == 0 || currentSizeMb + nextSizeMb
< avgRegionSizeMb) {
Review comment:
Replying to my earlier comment,
> So let me propose this: rather than basing this decision on a scaling
factor, how about we decide on some arbitrary value to use as meaning
"effectively 0" in size.
Per my above, and @mnpoonia 's, we've already decided that "effectively 0"
means "less than 1mb according to reported metrics." Thus I think we should
keep this "special logic".
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