Check the sloppiness of the region load before balancing
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Key: HBASE-3681
URL: https://issues.apache.org/jira/browse/HBASE-3681
Project: HBase
Issue Type: Improvement
Affects Versions: 0.90.1
Reporter: Jean-Daniel Cryans
Fix For: 0.92.0
Per our discussion at the hackathon today, it seems that it would be more
helpful to add a sloppiness check before doing the normal balancing.
The current situation is that the balancer always tries to get the region load
even, meaning that there can be some very frequent regions movement.
Setting the balancer to run less often (like every 4 hours) isn't much better
since the load could get out of whack easily.
This is why running the normal balancer frequently, but first checking for some
sloppiness in the region load across the RS, seems like a more viable option.
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