ndimiduk commented on a change in pull request #1922:
URL: https://github.com/apache/hbase/pull/1922#discussion_r446413487
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.java
##########
@@ -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:
I think what we need is to unset the default values of
`hbase.normalizer.merge.min_region_age.days` and
`hbase.normalizer.merge.min_region_size.mb`. If someone wants the features,
make them opt-in.
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