region be merged with others automatically when all data in the region has
expired and removed, or region gets too small.
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Key: HBASE-3521
URL: https://issues.apache.org/jira/browse/HBASE-3521
Project: HBase
Issue Type: Improvement
Components: master, regionserver, scripts
Affects Versions: 0.90.0
Reporter: zhoushuaifeng
Priority: Minor
We have test a cluster which have more than 30,000 regions, max size of a
region is 512MB. At this situation, data no more growing, but remove some old
data and insert new, and regions will be more and more. And some regions may be
very small or empty. This occupies too much heapsize, and will be more if
regions cannot be merged. This will limit hbase running for a long time.
A script that does a survey to remove empty regions, or pick out adjacent small
regions that then does the online merge up seems like it would be useful.
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